Threat Database Worms Worm.Kapucen.A

Worm.Kapucen.A

By Domesticus in Worms

Threat Scorecard

Threat Level: 80 % (High)
Infected Computers: 0
First Seen: December 1, 2009
OS(es) Affected: Windows

Worm.Kapucen.A is a network worm that targets Windows operating systems. Worm.Kapucen.A is able to spread via removable media or peer-to-peer networks. On infecting a computer system, Worm.Kapucen.A will connect to the internet and communicate with a remote server via HTTP. Worm.Kapucen.A will also place a copy of itself in \svchost.exe and then create the file \Log.txt.

Aliases

15 security vendors flagged this file as malicious.

Antivirus Vendor Detection
Symantec W32.Ecup
Sophos W32/Kapucen-D
Prevx1 Cloaked Malware
Panda W32/Puce.I.worm
NOD32 Win32/Kapucen.NAM
Microsoft Worm:Win32/Puce.gen!B
eTrust-Vet Win32/Puce.F
Comodo Worm.Win32.Kapucen.~B
ClamAV Worm.W32.Puce
CAT-QuickHeal Win32.Worm.Puce.gen!B.4
AVG Win32/Puce.E
AhnLab-V3 Win32/IRCBot.worm.variant
a-squared P2P-Worm.Win32.Kapucen.b!IK
TrendMicro WORM_KAPUCEN.B
Symantec Trojan Horse

SpyHunter Detects & Remove Worm.Kapucen.A

File System Details

Worm.Kapucen.A may create the following file(s):
# File Name MD5 Detections
1. svchost.exe 8dfc24fd74b0fbb4369b54fd39e5a1f7 0
More files

Analysis Report

General information

Family Name: Trojan.Kapucen.A
Signature status: No Signature

Known Samples

MD5: 2ce1b578ed684c1384e2fcef574adea4
SHA1: 224aa58aaa92adb1aa1be24c9beeb6cb2d797dfd
SHA256: 6EE6DE486C43B00F8B6E35203634047544BBC20431C71B2B745A1882FCB9ECF8
File Size: 106.50 KB, 106496 bytes
MD5: f3b5063f655710fbe8ce3a77237983b2
SHA1: 8feb248a3678da666007f096bc64cbcbfb0838f7
SHA256: B6C4C271B5B31E72F273EC3ED69C7FBE19C8DE44495FAEA7B942BCD1C74B3F4B
File Size: 106.50 KB, 106496 bytes
MD5: 49c5c299a80c9c5ecfd0cfcc3ad4a92c
SHA1: 4b5da4b1471baa6608ee70deb597b3c2ab917328
SHA256: 83116A703A3C4D6719F4CCD9D118D74BDF036C0657161C062FDE3E5C74F48698
File Size: 106.50 KB, 106496 bytes
MD5: e92e4bd29c9ea6c65b8ce680da1cc507
SHA1: fb0450e23217eef00d93fef1008be6dba07a9aea
SHA256: 6060AB3EEB9D146089141EF79E30E8DF8DCAE37B39B8158FA1C411075A19744E
File Size: 106.50 KB, 106496 bytes
MD5: 635bc2986de0fd521e2d64f0b4385869
SHA1: 9ab99ecedb0a3f3a5f5e1226f3bf670f6a5c586b
SHA256: 4E3D9CAE95D1BE9A2DB1790831EFE5E0BABAAF884EE2733354B2B65799C68781
File Size: 102.40 KB, 102400 bytes

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 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)
  • File is not packed
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  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Icons

File Traits

  • HighEntropy
  • No Version Info
  • x86

Block Information

Total Blocks: 208
Potentially Malicious Blocks: 21
Whitelisted Blocks: 180
Unknown Blocks: 7

Visual Map

? ? ? ? ? ? ? 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x x x 0 x x x x x 0 0 x 0 x x x 0 0 x x x x x x x x x 0 0 1 1 0 1 1 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

Files Modified

File Attributes
c:\users\user\appdata\local\temp\svchost.exe Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144
c:\users\user\downloads\log.txt Generic Read,Generic Execute,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 786496

Registry Modifications

Key::Value Data API Name
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
HKLM\software\wow6432node\microsoft\windows\currentversion\run::windowsservicesstartup C:\Users\Gxddfjnw\AppData\Local\Temp\svchost.exe 1 RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 闺ȁ ਪˣ鈯ˣ遙̃豤̃অˣ炑̃龡^濖̃賬̃P獖}偫~엦1਷ˣ邯̃뫯ʃdᵂċᵆċeဈ엦1:¶i ꙥžr֢ RegNtPreCreateKey
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HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 zk�8�jg�B�8 �� �6 �v �� 7� �� �� ۀ���T�B���������%��3bBx�<���!#��$kF$��%`�%�&� &�-'�!(�(X�(�) ;)�`*J*9*�",=�-!R0P%1`1�1HO5,]5�G>��@V�@�*A��B B��E�mF  RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\windows\currentversion\run::windowsservicesstartup C:\Users\Kjsqotwn\AppData\Local\Temp\svchost.exe 1 RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 � * �/��Y�d�� ��ރ�p�o�#Vs}kP~��1��7 ���ﺃdB F e��1 �� RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 �k�8��jg�B �� �v �� 7� xy �� ���T�B������%����Bx�!#��$kF$��%�&� '�!(�(X�(�) ;)�`*9*�",=�-!R1�1HO5,]5�G>��@V�@�*A��B F Fy�H�pJ��M�lN$N�P@jR�JR��X �X�.X�b"h RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\windows\currentversion\run::windowsservicesstartup C:\Users\Oczmbemw\AppData\Local\Temp\svchost.exe 1 RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 e� * �/��Y�d�� ��ރ�p��^�o�7Vs}kP~��1��7 ���ﺃee����12��fe��iUe��rG�se�� RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 �l�8�tX�jg�8 �� �6 �v xy ����T���������%���5����3bBx��!wz#�#��$kF%`�&� &�-(�(X�(�)�`*J*9*�"+�[-!R0P%1`1�1HO1�D5,]9ߔ@V�A��B��F?G�IH[uH�pH��J��K��N$N� RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\windows\currentversion\run::windowsservicesstartup C:\Users\Uurcgpks\AppData\Local\Temp\svchost.exe 1 RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 �  xy* �/��Y�d�kP~� ��ރ�p$��^�o�eeSVs}$kP~$��1B��7 ���ﺃe"e��� ��1-��fe��g� RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 �m�8��8z�jg�B�8 �� �6 �v z �Z xy �� �a��T�B�����������5���� +Bx�<��5�R �!wz"Wc#�#��$kF$��%:�%`�%�&� &�-(�(X�)E)�`*J*9*�"+�[,��-!R/9�/��0P%1`1� RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\windows\currentversion\run::windowsservicesstartup C:\Users\Fqoymcca\AppData\Local\Temp\svchost.exe 1 RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 鵅ȁ 砍yਪˣ鈯ˣ遙̃豤̃偫~অˣ炑̃龡^濖̃賬̃獖}偫~엦1 鰚²਷ˣ邯̃뫯ʃeꙥžᐊ엦1¶fꙥžh溼´iꙥžp RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 �n�8��"a�jg�8 �� �v xy ��T��������%������Bx!wz#�#��$kF%:�&� (�(X�(�)�`*J*9*�"+�[-!R/9�/��1`1�1HO1��1�D5,]9ߔ=�>3�@V�A��D�G�IH[uH�pJ��K��N$N�R20R�JU_*V � RegNtPreCreateKey

Windows API Usage

Category API
Other Suspicious
  • AdjustTokenPrivileges
Process Manipulation Evasion
  • NtUnmapViewOfSection
Process Shell Execute
  • CreateProcess
  • ShellExecute
User Data Access
  • GetUserObjectInformation
Anti Debug
  • NtQuerySystemInformation

Shell Command Execution

open Log.txt
C:\Users\Gxddfjnw\AppData\Local\Temp\svchost.exe 1
C:\Users\Kjsqotwn\AppData\Local\Temp\svchost.exe 1
C:\Users\Oczmbemw\AppData\Local\Temp\svchost.exe 1
C:\Users\Uurcgpks\AppData\Local\Temp\svchost.exe 1
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C:\Users\Fqoymcca\AppData\Local\Temp\svchost.exe 1