Trojan.Downloader.Firseria
Threat Scorecard
EnigmaSoft Threat Scorecard
EnigmaSoft Threat Scorecards are assessment reports for different malware threats which have been collected and analyzed by our research team. EnigmaSoft Threat Scorecards evaluate and rank threats using several metrics including real-world and potential risk factors, trends, frequency, prevalence, and persistence. EnigmaSoft Threat Scorecards are updated regularly based on our research data and metrics and are useful for a wide range of computer users, from end users seeking solutions to remove malware from their systems to security experts analyzing threats.
EnigmaSoft Threat Scorecards display a variety of useful information, including:
Popularity Rank: The ranking of a particular threat in EnigmaSoft’s Threat Database.
Severity Level: The determined severity level of an object, represented numerically, based on our risk modeling process and research, as explained in our Threat Assessment Criteria.
Infected Computers: The number of confirmed and suspected cases of a particular threat detected on infected computers as reported by SpyHunter.
See also Threat Assessment Criteria.
| Popularity Rank: | 12,425 |
| Threat Level: | 80 % (High) |
| Infected Computers: | 721 |
| First Seen: | August 22, 2018 |
| Last Seen: | June 22, 2026 |
| OS(es) Affected: | Windows |
Table of Contents
Analysis Report
General information
| Family Name: | Trojan.Downloader.Firseria |
|---|---|
| Packers: | UPX |
| Signature status: | Root Not Trusted |
Known Samples
Known Samples
This section lists other file samples believed to be associated with this family.|
MD5:
74419fcafd5b0cf8b66b4040a824442b
SHA1:
045a0700ba81030a479fd6f041d5eb1a388cdc3d
SHA256:
A676B802990386764F43AA6FC32034458CA499B765E5B08F19A314759BBE52AF
File Size:
526.43 KB, 526432 bytes
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MD5:
b2e4e7069c57a165c3c609d5ea9a4cef
SHA1:
ff02bfbada66239b68e2cd2e66020238f7551964
SHA256:
765C8BF1009D1F39A2EB1147082F5BA58603F96F7860D3C33BEE5DC6542F967D
File Size:
178.02 KB, 178024 bytes
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MD5:
f06bb0ccfac60369651ea821d8a19bfe
SHA1:
34bea79397f8adac74aea195804224ca3c3bddfb
SHA256:
ADB6FEA52A6EE9BBF10EEDBF175C689979A58980919A0438B5F67F94C880E1C6
File Size:
660.06 KB, 660064 bytes
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MD5:
f9b609aaa3c0e1ba7c4db25de7914221
SHA1:
520dd913a1303042df3b5878e92ba676c2819946
SHA256:
B40AE1F02F077A8B9F029B78BAF2B9C5C72C3F3C6AD9C20860F4C8295FC3D44D
File Size:
195.43 KB, 195432 bytes
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Windows Portable Executable Attributes
- File doesn't have "Rich" header
- File doesn't have debug information
- File doesn't have exports table
- File doesn't have relocations information
- File doesn't have security information
- File has been packed
- File is 32-bit executable
- File is either console or GUI application
- File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
- File is Native application (NOT .NET application)
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- File is not packed
- IMAGE_FILE_DLL is not set inside PE header (Executable)
- IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)
File Icons
File Icons
This section displays icon resources found within family samples. Malware often replicates icons commonly associated with legitimate software to mislead users into believing the malware is safe.
Windows PE Version Information
Windows PE Version Information
This section displays values and attributes that have been set in the Windows file version information data structure for samples within this family. To mislead users, malware actors often add fake version information mimicking legitimate software.| Name | Value |
|---|---|
| Company Name | Rapiddown |
| File Description | DownloaddMger |
| File Version |
|
| Internal Name | install |
| Legal Copyright | copyright·©·2013 |
| Original Filename | ¡nstal·exe |
| Product Version | 3.0.26 |
Digital Signatures
Digital Signatures
This section lists digital signatures that are attached to samples within this family. When analyzing and verifying digital signatures, it is important to confirm that the signature’s root authority is a well-known and trustworthy entity and that the status of the signature is good. Malware is often signed with non-trustworthy “Self Signed” digital signatures (which can be easily created by a malware author with no verification). Malware may also be signed by legitimate signatures that have an invalid status, and by signatures from questionable root authorities with fake or misleading “Signer” names.| Signer | Root | Status |
|---|---|---|
| RAPIDDOWN | DigiCert Assured ID Root CA | Root Not Trusted |
Block Information
Block Information
During analysis, EnigmaSoft breaks file samples into logical blocks for classification and comparison with other samples. Blocks can be used to generate malware detection rules and to group file samples into families based on shared source code, functionality and other distinguishing attributes and characteristics. This section lists a summary of this block data, as well as its classification by EnigmaSoft. A visual representation of the block data is also displayed, where available.| Total Blocks: | 628 |
|---|---|
| Potentially Malicious Blocks: | 28 |
| Whitelisted Blocks: | 600 |
| Unknown Blocks: | 0 |
Visual Map
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0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block
? - Unknown Block
x - Potentially Malicious Block
Files Modified
Files Modified
This section lists files that were created, modified, moved and/or deleted by samples in this family. File system activity can provide valuable insight into how malware functions on the operating system.| File | Attributes |
|---|---|
| c:\users\user\appdata\local\temp\n1890\s1890.exe | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\n3747\ins3747.exe | Generic Write,Read Attributes |
| c:\users\user\appdata\local\temp\n3836\ins3836.exe | Generic Write,Read Attributes |
| c:\users\user\appdata\locallow\microsoft\cryptneturlcache\content\7d266d9e1e69fa1eefb9699b009b34c8_0a9bfdd75b598c2110cbf610c078e6e6 | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\locallow\microsoft\cryptneturlcache\content\8dfdf057024880d7a081afbf6d26b92f | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\locallow\microsoft\cryptneturlcache\content\9a19adad9d098e039450abbedd5616eb_90988534438596fe5d238c3ba6208526 | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\locallow\microsoft\cryptneturlcache\content\a89dfcc31c360ba5cbd616749b1b1c5d | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\locallow\microsoft\cryptneturlcache\metadata\7d266d9e1e69fa1eefb9699b009b34c8_0a9bfdd75b598c2110cbf610c078e6e6 | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\locallow\microsoft\cryptneturlcache\metadata\8dfdf057024880d7a081afbf6d26b92f | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\users\user\appdata\locallow\microsoft\cryptneturlcache\metadata\9a19adad9d098e039450abbedd5616eb_90988534438596fe5d238c3ba6208526 | Generic Read,Write Data,Write Attributes,Write extended,Append data |
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| c:\users\user\appdata\locallow\microsoft\cryptneturlcache\metadata\a89dfcc31c360ba5cbd616749b1b1c5d | Generic Read,Write Data,Write Attributes,Write extended,Append data |
| c:\windows\assembly | Synchronize,Write Attributes |
Registry Modifications
Registry Modifications
This section lists registry keys and values that were created, modified and/or deleted by samples in this family. Windows Registry activity can provide valuable insight into malware functionality. Additionally, malware often creates registry values to allow itself to automatically start and indefinitely persist after an initial infection has compromised the system.| Key::Value | Data | API Name |
|---|---|---|
| HKLM\system\controlset001\control\session manager::pendingfilerenameoperations | \??\C:\Windows\SystemTemp\a9dd6c3f-d641-4292-855a-e9c09c1b694b.tmp \??\C:\Windows\SystemTemp\85968c61-a19d-4e7b-a80f-d2a1fc3c08 | RegNtPreCreateKey |
| HKLM\system\controlset001\control\session manager::pendingfilerenameoperations | \??\C:\Windows\SystemTemp\a9dd6c3f-d641-4292-855a-e9c09c1b694b.tmp \??\C:\Windows\SystemTemp\85968c61-a19d-4e7b-a80f-d2a1fc3c08 | RegNtPreCreateKey |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet | RegNtPreCreateKey | |
| HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect | RegNtPreCreateKey |
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| HKLM\software\microsoft\systemcertificates\authroot\certificates\4eb6d578499b1ccf5f581ead56be3d9b6744a5e5::blob | ់㹧ৢ䗾鍗ᳺ ứ霞輫穆轙⊩㢅즔S c 愰ℰଆ虠ňŅᜇ〆〒ؐ⬊ĆĄ㞂ļ́ダ؟怉䢆蘁泽ĂሰူਆثЁ舁㰷āȃ쀀ᬰԆ腧Č〃〒ؐ⬊ĆĄ㞂ļ́翀 Ā ⨀ ب⬈Ćԅ̇⬈Ćԅ̇⬈Ćԅ̇⬈Ćԅ̇ँ Ā ⨀ ب⬈Ćԅ̇⬈Ćԅ | RegNtPreCreateKey |
| HKLM\software\microsoft\systemcertificates\authroot\certificates\4eb6d578499b1ccf5f581ead56be3d9b6744a5e5::blob | \ ص�6�hbu�B�Ҫ�7 N��xI� �_X �V�=�gD��h ~ �/-�� ����\L�A��T�a V e r i S i g n �e�����0 �C9��313b �ϫ~C��k&*����e������d��� * 0( | RegNtPreCreateKey |
| HKLM\software\microsoft\systemcertificates\root\certificates\be36a4562fb2ee05dbb3d32323adf445084ed656::blob | \ Ѐ 볝蚽㾜ࠛ컯퇄춈ᔻ ᰘ兘槹镹⍋ . Thawte Timestamping CA ਰࠆثԁ܅ࠃ 㚾嚤눯돛⏓괣䗴丈囖 晿煺硩騠ᑑ莝⃚ ꗨ뺘芄ﺎ炮ᔑ㔁뉶 ʥ | RegNtPreCreateKey |
Windows API Usage
Windows API Usage
This section lists Windows API calls that are used by the samples in this family. Windows API usage analysis is a valuable tool that can help identify malicious activity, such as keylogging, security privilege escalation, data encryption, data exfiltration, interference with antivirus software, and network request manipulation.| Category | API |
|---|---|
| Anti Debug |
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| User Data Access |
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| Process Manipulation Evasion |
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| Process Shell Execute |
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| Syscall Use |
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2 additional items are not displayed above. |
| Encryption Used |
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Shell Command Execution
Shell Command Execution
This section lists Windows shell commands that are run by the samples in this family. Windows Shell commands are often leveraged by malware for nefarious purposes and can be used to elevate security privileges, download and launch other malware, exploit vulnerabilities, collect and exfiltrate data, and hide malicious activity.
s1890.exe 30cb3dae7b4f397e0a5a9108uL6KamSNxbsl/Wecags7y73LNZQPW+uSWU5Sxg0COmpLiC8ruo5Ai5eK+m4joydHyxhFdkZhMfDq/FUByLH/A94eOVBWUT8vyjWSp2hv3Unjvp01lNZhove/rME9gL7OjVdIknuE0ZY4ya5zarIcTR6J /v "c:\users\user\downloads\045a0700ba81030a479fd6f041d5eb1a388cdc3d_0000526432"
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open C:\Users\Kbbzzxwt\AppData\Local\Temp\\n3836\ins3836.exe ins.exe /e5610583 /u50d1d9d5-cf90-407c-820a-35e05bc06f2f
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open C:\Users\Qtctuuqa\AppData\Local\Temp\\n3747\ins3747.exe ins.exe /e12091047 /u50af3520-6b08-4b9d-a6b2-07165bc06f2f
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