darkcomet | 018556978f8a8e862bb57db11a55e0be62b424db127b66cd77451fe970b30ee0

Analysis

max time kernel
133s
max time network
103s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
27/06/2024, 16:38

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General

Target
16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe
Size 300KB
Sample240627-t5kjaasdml
SHA256 018556978f8a8e862bb57db11a55e0be62b424db127b66cd77451fe970b30ee0
MD5 16b8315c6de1994bdcbc0faf574a162b
SHA1 38c2018b835dcc8dd6e6c156f7619c8e0acc493d
SHA512 85f5c29486979cb3480fbfa9ab302a29463b060b12dc3aa95785037cfdc2b7f917492f8a1f3a7043d80ef09dca38b908b0f4423907f31148b8c554323fdca4f2
SSDEEP 6144:63EriZWNoVdGEu3j1LdH+gYOFtDD02M14rqM:8EWdGn3jzH+ca5M
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet user evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

User

97.81.46.17:1604
socksproxy1.serveftp.com:1604

Mutex

DC_MUTEX-R0MQYLT

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
SkFtw2Fer8G2
install
true
offline_keylogger
true
persistence
true
reg_key
MicroUpdate

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\MSDCSC\\msdcsc.exe"	vbc.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2044	attrib.exe
4668	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation	16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
3024	msconfig.exe
1328	msdcsc.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/3004-20-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/3004-22-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/3004-24-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/3004-23-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/3004-19-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/3004-34-0x0000000000400000-0x00000000004B9000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\18.exe = "C:\\Users\\Admin\\AppData\\RoamingMicrosoft\\System\\Services\\18.exe"	msconfig.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\18.exe = "C:\\Users\\Admin\\AppData\\RoamingMicrosoft\\System\\Services\\18.exe"	msconfig.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3024 set thread context of 3004	3024	msconfig.exe	84

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe	attrib.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727	attrib.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe
3024	msconfig.exe

Suspicious use of AdjustPrivilegeToken 25 IoCs

description	pid	Process
Token: SeDebugPrivilege	3024	msconfig.exe
Token: SeIncreaseQuotaPrivilege	3004	vbc.exe
Token: SeSecurityPrivilege	3004	vbc.exe
Token: SeTakeOwnershipPrivilege	3004	vbc.exe
Token: SeLoadDriverPrivilege	3004	vbc.exe
Token: SeSystemProfilePrivilege	3004	vbc.exe
Token: SeSystemtimePrivilege	3004	vbc.exe
Token: SeProfSingleProcessPrivilege	3004	vbc.exe
Token: SeIncBasePriorityPrivilege	3004	vbc.exe
Token: SeCreatePagefilePrivilege	3004	vbc.exe
Token: SeBackupPrivilege	3004	vbc.exe
Token: SeRestorePrivilege	3004	vbc.exe
Token: SeShutdownPrivilege	3004	vbc.exe
Token: SeDebugPrivilege	3004	vbc.exe
Token: SeSystemEnvironmentPrivilege	3004	vbc.exe
Token: SeChangeNotifyPrivilege	3004	vbc.exe
Token: SeRemoteShutdownPrivilege	3004	vbc.exe
Token: SeUndockPrivilege	3004	vbc.exe
Token: SeManageVolumePrivilege	3004	vbc.exe
Token: SeImpersonatePrivilege	3004	vbc.exe
Token: SeCreateGlobalPrivilege	3004	vbc.exe
Token: 33	3004	vbc.exe
Token: 34	3004	vbc.exe
Token: 35	3004	vbc.exe
Token: 36	3004	vbc.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3588 wrote to memory of 3024	3588	16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe	83
PID 3588 wrote to memory of 3024	3588	16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe	83
PID 3588 wrote to memory of 3024	3588	16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe	83
PID 3024 wrote to memory of 3004	3024	msconfig.exe	84
PID 3024 wrote to memory of 3004	3024	msconfig.exe	84
PID 3024 wrote to memory of 3004	3024	msconfig.exe	84
PID 3024 wrote to memory of 3004	3024	msconfig.exe	84
PID 3024 wrote to memory of 3004	3024	msconfig.exe	84
PID 3024 wrote to memory of 3004	3024	msconfig.exe	84
PID 3024 wrote to memory of 3004	3024	msconfig.exe	84
PID 3024 wrote to memory of 3004	3024	msconfig.exe	84
PID 3004 wrote to memory of 2176	3004	vbc.exe	86
PID 3004 wrote to memory of 2176	3004	vbc.exe	86
PID 3004 wrote to memory of 2176	3004	vbc.exe	86
PID 3004 wrote to memory of 3268	3004	vbc.exe	88
PID 3004 wrote to memory of 3268	3004	vbc.exe	88
PID 3004 wrote to memory of 3268	3004	vbc.exe	88
PID 3004 wrote to memory of 1328	3004	vbc.exe	89
PID 3004 wrote to memory of 1328	3004	vbc.exe	89
PID 3004 wrote to memory of 1328	3004	vbc.exe	89
PID 2176 wrote to memory of 2044	2176	cmd.exe	92
PID 2176 wrote to memory of 2044	2176	cmd.exe	92
PID 2176 wrote to memory of 2044	2176	cmd.exe	92
PID 3268 wrote to memory of 4668	3268	cmd.exe	93
PID 3268 wrote to memory of 4668	3268	cmd.exe	93
PID 3268 wrote to memory of 4668	3268	cmd.exe	93

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2044	attrib.exe
4668	attrib.exe

C:\Users\Admin\AppData\Local\Temp\16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\16b8315c6de1994bdcbc0faf574a162b_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3588
- C:\Users\Admin\AppData\Roaming\msconfig.exe
  "C:\Users\Admin\AppData\Roaming\msconfig.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3024
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
    3⤵
    - Modifies WinLogon for persistence
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3004
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2176
    - - C:\Windows\SysWOW64\attrib.exe
        
        attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
        5⤵
        Sets file to hidden
        Drops file in Windows directory
        Views/modifies file attributes
        
        PID:2044
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3268
    - - C:\Windows\SysWOW64\attrib.exe
        
        attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
        5⤵
        Sets file to hidden
        Drops file in Windows directory
        Views/modifies file attributes
        
        PID:4668
  - - C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
      "C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe"
      4⤵
      Executes dropped EXE
      PID:1328

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Scripting

T1064

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

msdcsc.exe

Path C:\Users\Admin\AppData\Roaming\MSDCSC\msdcsc.exe
Size 1.1MB
SHA256 b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0
MD5 d881de17aa8f2e2c08cbb7b265f928f9
SHA1 08936aebc87decf0af6e8eada191062b5e65ac2a
SHA512 5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34
SSDEEP 24576:jp2silPBMIXGWClfuRcUGIJYK15Qs/QZM:jp2sMO7VzUTJH15QFZM
MD5 SHA1 SHA512 SSDEEP

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msconfig.exe

Path C:\Users\Admin\AppData\Roaming\msconfig.exe
Size 300KB
SHA256 018556978f8a8e862bb57db11a55e0be62b424db127b66cd77451fe970b30ee0
MD5 16b8315c6de1994bdcbc0faf574a162b
SHA1 38c2018b835dcc8dd6e6c156f7619c8e0acc493d
SHA512 85f5c29486979cb3480fbfa9ab302a29463b060b12dc3aa95785037cfdc2b7f917492f8a1f3a7043d80ef09dca38b908b0f4423907f31148b8c554323fdca4f2
SSDEEP 6144:63EriZWNoVdGEu3j1LdH+gYOFtDD02M14rqM:8EWdGn3jzH+ca5M
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3004-24-0x0000000000400000-0x00000000004B9000-memory.dmp

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memory/3004-20-0x0000000000400000-0x00000000004B9000-memory.dmp

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memory/3004-22-0x0000000000400000-0x00000000004B9000-memory.dmp

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memory/3004-23-0x0000000000400000-0x00000000004B9000-memory.dmp

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memory/3004-19-0x0000000000400000-0x00000000004B9000-memory.dmp

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memory/3004-34-0x0000000000400000-0x00000000004B9000-memory.dmp

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memory/3024-16-0x0000000074A60000-0x0000000075011000-memory.dmp

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memory/3024-17-0x0000000074A60000-0x0000000075011000-memory.dmp

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memory/3024-39-0x0000000074A60000-0x0000000075011000-memory.dmp

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memory/3588-2-0x0000000074A60000-0x0000000075011000-memory.dmp

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memory/3588-15-0x0000000074A60000-0x0000000075011000-memory.dmp

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memory/3588-0-0x0000000074A62000-0x0000000074A63000-memory.dmp

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memory/3588-1-0x0000000074A60000-0x0000000075011000-memory.dmp

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