darkcomet | d571ff9a1d5fbc0f6e362ff75f7cec4a9ef36cdf0681e4511847eab7351757c2

General

Target
1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe
Size 1.2MB
Sample240702-1g42ca1blc
SHA256 d571ff9a1d5fbc0f6e362ff75f7cec4a9ef36cdf0681e4511847eab7351757c2
MD5 1d879b950fdbead79ab703aa3ae06ff3
SHA1 118551e59f96d21891407b310013b9d77786c500
SHA512 cdd5269e127d3a7ca4d1688726424015bbcfce88d20832ec6db7e138cbb749458a79a70f75162801db930e8297fb21fa49029ce2695be040b3f028935ca3f66e
SSDEEP 12288:kpU9b5pYXaiDoh93B3W55ES+VF1U9f6OTHigtIZxOeqA5ulpA9/z5CHtGLugDj+y:N9b43c452V0EOmTpni1RTAz17v
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet lexcro persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

lexcro

C2

lexcro.no-ip.biz:4040

Mutex

DC_MUTEX-T9Z1DKS

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
5YqsobkB5NX8
install
true
offline_keylogger
true
persistence
false
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\\Documents\\MSDCSC\\msdcsc.exe"	vbc.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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	vbc.exe

Executes dropped EXE 2 IoCs

pid	Process
3156	vbc.exe
2052	msdcsc.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\JavaUpdtr = "C:\\Users\\Admin\\AppData\\Roaming\\JavaUpdtr\\1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe"	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3932 set thread context of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 25 IoCs

description	pid	Process
Token: SeDebugPrivilege	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	3156	vbc.exe
Token: SeSecurityPrivilege	3156	vbc.exe
Token: SeTakeOwnershipPrivilege	3156	vbc.exe
Token: SeLoadDriverPrivilege	3156	vbc.exe
Token: SeSystemProfilePrivilege	3156	vbc.exe
Token: SeSystemtimePrivilege	3156	vbc.exe
Token: SeProfSingleProcessPrivilege	3156	vbc.exe
Token: SeIncBasePriorityPrivilege	3156	vbc.exe
Token: SeCreatePagefilePrivilege	3156	vbc.exe
Token: SeBackupPrivilege	3156	vbc.exe
Token: SeRestorePrivilege	3156	vbc.exe
Token: SeShutdownPrivilege	3156	vbc.exe
Token: SeDebugPrivilege	3156	vbc.exe
Token: SeSystemEnvironmentPrivilege	3156	vbc.exe
Token: SeChangeNotifyPrivilege	3156	vbc.exe
Token: SeRemoteShutdownPrivilege	3156	vbc.exe
Token: SeUndockPrivilege	3156	vbc.exe
Token: SeManageVolumePrivilege	3156	vbc.exe
Token: SeImpersonatePrivilege	3156	vbc.exe
Token: SeCreateGlobalPrivilege	3156	vbc.exe
Token: 33	3156	vbc.exe
Token: 34	3156	vbc.exe
Token: 35	3156	vbc.exe
Token: 36	3156	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3932 wrote to memory of 3156	3932	1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe	81
PID 3156 wrote to memory of 2052	3156	vbc.exe	82
PID 3156 wrote to memory of 2052	3156	vbc.exe	82
PID 3156 wrote to memory of 2052	3156	vbc.exe	82

C:\Users\Admin\AppData\Local\Temp\1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\1d879b950fdbead79ab703aa3ae06ff3_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3932
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  C:\Users\Admin\AppData\Local\Temp\vbc.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3156
- - C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
    "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    PID:2052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

Scripting

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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vbc.exe

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

Submit Download

memory/3156-7-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/3156-10-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/3156-14-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/3156-12-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/3156-17-0x0000000002190000-0x0000000002191000-memory.dmp

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memory/3156-30-0x0000000000400000-0x00000000004BD000-memory.dmp

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memory/3932-0-0x0000000074A32000-0x0000000074A33000-memory.dmp

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memory/3932-1-0x0000000074A30000-0x0000000074FE1000-memory.dmp

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memory/3932-2-0x0000000074A30000-0x0000000074FE1000-memory.dmp

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memory/3932-18-0x0000000074A30000-0x0000000074FE1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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