darkcomet | cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8

General

Target

cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe
Size

825KB
MD5

8ee96064220b9576479c458e2ad51411
SHA1

ef27c1347df38df970d6d0ac9c3330c60d032dbb
SHA256

cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8
SHA512

74658cad0d8b38191e90e068e3e7bb7429e7e3a41555a5fadf33b6118ac36e8f4f1b8e5de20c17a340985285e7899c104d1eb5f5e8074c5dc193b934dc016f8a
SSDEEP

12288:GPcF55DQMSjPaiibTKQZEHi3usCJbGwVHxxhqW+yeGUqG2RKSC:GPGUVPanKMZ35CJCw3rY41n

Score

10^/10

darkcomet evasion persistence rat trojan

Malware Config

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

T1004

Modify Registry

T1112

Processes:

AppLaunch.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\WidnowsUpdate\\msdcsc.exe"	AppLaunch.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

4044 msdcsc.exe
Sets file to hidden 1 TTPs 2 IoCs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

1320 attrib.exe
5116 attrib.exe

pid	process
4044	msdcsc.exe

pid	process
1320	attrib.exe
5116	attrib.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

AppLaunch.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\WidnowsUpdate\\msdcsc.exe"	AppLaunch.exe

Drops file in System32 directory 3 IoCs

Processes:

AppLaunch.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\WidnowsUpdate\msdcsc.exe	AppLaunch.exe
File opened for modification	C:\Windows\SysWOW64\WidnowsUpdate\	AppLaunch.exe
File created	C:\Windows\SysWOW64\WidnowsUpdate\msdcsc.exe	AppLaunch.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe

description	pid	process	target process
PID 4864 set thread context of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe

Drops file in Windows directory 2 IoCs

Processes:

attrib.exeattrib.exe

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

Modifies registry class 1 IoCs

Processes:

AppLaunch.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ AppLaunch.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	AppLaunch.exe

Suspicious use of AdjustPrivilegeToken 25 IoCs

Processes:

cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exeAppLaunch.exe

description	pid	process
Token: SeDebugPrivilege	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe
Token: SeIncreaseQuotaPrivilege	4760	AppLaunch.exe
Token: SeSecurityPrivilege	4760	AppLaunch.exe
Token: SeTakeOwnershipPrivilege	4760	AppLaunch.exe
Token: SeLoadDriverPrivilege	4760	AppLaunch.exe
Token: SeSystemProfilePrivilege	4760	AppLaunch.exe
Token: SeSystemtimePrivilege	4760	AppLaunch.exe
Token: SeProfSingleProcessPrivilege	4760	AppLaunch.exe
Token: SeIncBasePriorityPrivilege	4760	AppLaunch.exe
Token: SeCreatePagefilePrivilege	4760	AppLaunch.exe
Token: SeBackupPrivilege	4760	AppLaunch.exe
Token: SeRestorePrivilege	4760	AppLaunch.exe
Token: SeShutdownPrivilege	4760	AppLaunch.exe
Token: SeDebugPrivilege	4760	AppLaunch.exe
Token: SeSystemEnvironmentPrivilege	4760	AppLaunch.exe
Token: SeChangeNotifyPrivilege	4760	AppLaunch.exe
Token: SeRemoteShutdownPrivilege	4760	AppLaunch.exe
Token: SeUndockPrivilege	4760	AppLaunch.exe
Token: SeManageVolumePrivilege	4760	AppLaunch.exe
Token: SeImpersonatePrivilege	4760	AppLaunch.exe
Token: SeCreateGlobalPrivilege	4760	AppLaunch.exe
Token: 33	4760	AppLaunch.exe
Token: 34	4760	AppLaunch.exe
Token: 35	4760	AppLaunch.exe
Token: 36	4760	AppLaunch.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exeAppLaunch.execmd.execmd.exe

description	pid	process	target process
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4864 wrote to memory of 4760	4864	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 4760 wrote to memory of 3420	4760	AppLaunch.exe	cmd.exe
PID 4760 wrote to memory of 3420	4760	AppLaunch.exe	cmd.exe
PID 4760 wrote to memory of 3420	4760	AppLaunch.exe	cmd.exe
PID 4760 wrote to memory of 64	4760	AppLaunch.exe	cmd.exe
PID 4760 wrote to memory of 64	4760	AppLaunch.exe	cmd.exe
PID 4760 wrote to memory of 64	4760	AppLaunch.exe	cmd.exe
PID 3420 wrote to memory of 1320	3420	cmd.exe	attrib.exe
PID 3420 wrote to memory of 1320	3420	cmd.exe	attrib.exe
PID 3420 wrote to memory of 1320	3420	cmd.exe	attrib.exe
PID 64 wrote to memory of 5116	64	cmd.exe	attrib.exe
PID 64 wrote to memory of 5116	64	cmd.exe	attrib.exe
PID 64 wrote to memory of 5116	64	cmd.exe	attrib.exe
PID 4760 wrote to memory of 4044	4760	AppLaunch.exe	msdcsc.exe
PID 4760 wrote to memory of 4044	4760	AppLaunch.exe	msdcsc.exe
PID 4760 wrote to memory of 4044	4760	AppLaunch.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

1320 attrib.exe
5116 attrib.exe

pid	process
1320	attrib.exe
5116	attrib.exe

C:\Users\Admin\AppData\Local\Temp\cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe
"C:\Users\Admin\AppData\Local\Temp\cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4864

C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\AppLaunch.exe
2⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4760

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:3420

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
4⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:1320

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:64

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
4⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:5116

C:\Windows\SysWOW64\WidnowsUpdate\msdcsc.exe
"C:\Windows\system32\WidnowsUpdate\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:4044

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Hidden Files and Directories

2

T1158

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat
Filesize
62B

MD5
c6abd7a109bb37ab773b9e79b91b7741

SHA1
7933b8795914b27483d2afed35b3830e8bf5bdb6

SHA256
8bc84b3ddfd9c295f555926bf1c311be423732423c585ca90796cdee7a245629

SHA512
35d14c9b7366a4737e3685223d55d85c583c7fbe73274577424dc8d9960cc78c79a80a8b42a62f6d9d9962ddd60cf2a332411d4ac18196258dc9d5b0b575e3dc

Download Submit
C:\Windows\SysWOW64\WidnowsUpdate\msdcsc.exe
Filesize
57KB

MD5
454501a66ad6e85175a6757573d79f8b

SHA1
8ca96c61f26a640a5b1b1152d055260b9d43e308

SHA256
7fd4f35aff4a0d4bfaae3a5dfb14b94934276df0e96d1a417a8f3693915e72c8

SHA512
9dc3b9a9b7e661acc3ac9a0ff4fd764097fc41ccbc2e7969cae9805cc693a87e8255e459ea5f315271825e7e517a46649acc8d42122a8018264cc3f2efa34fb7

Download Submit
C:\Windows\SysWOW64\WidnowsUpdate\msdcsc.exe
Filesize
57KB

MD5
454501a66ad6e85175a6757573d79f8b

SHA1
8ca96c61f26a640a5b1b1152d055260b9d43e308

SHA256
7fd4f35aff4a0d4bfaae3a5dfb14b94934276df0e96d1a417a8f3693915e72c8

SHA512
9dc3b9a9b7e661acc3ac9a0ff4fd764097fc41ccbc2e7969cae9805cc693a87e8255e459ea5f315271825e7e517a46649acc8d42122a8018264cc3f2efa34fb7

Download Submit
memory/64-139-0x0000000000000000-mapping.dmp

Download
memory/1320-141-0x0000000000000000-mapping.dmp

Download
memory/3420-138-0x0000000000000000-mapping.dmp

Download
memory/4044-143-0x0000000000000000-mapping.dmp

Download
memory/4760-136-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/4760-135-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/4760-134-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/4760-133-0x0000000000000000-mapping.dmp

Download
memory/4864-132-0x0000000074B50000-0x0000000075101000-memory.dmp

Filesize
5.7MB

Download
memory/4864-137-0x0000000074B50000-0x0000000075101000-memory.dmp

Filesize
5.7MB

Download
memory/5116-142-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads