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

384 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

520 attrib.exe
700 attrib.exe
Loads dropped DLL 1 IoCs

Processes:

AppLaunch.exe

pid process

2016 AppLaunch.exe

pid	process
384	msdcsc.exe

pid	process
520	attrib.exe
700	attrib.exe

pid	process
2016	AppLaunch.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-1-5-21-3845472200-3839195424-595303356-1000\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 1964 set thread context of 2016	1964	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

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exeAppLaunch.exe

description	pid	process
Token: SeDebugPrivilege	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe
Token: SeIncreaseQuotaPrivilege	2016	AppLaunch.exe
Token: SeSecurityPrivilege	2016	AppLaunch.exe
Token: SeTakeOwnershipPrivilege	2016	AppLaunch.exe
Token: SeLoadDriverPrivilege	2016	AppLaunch.exe
Token: SeSystemProfilePrivilege	2016	AppLaunch.exe
Token: SeSystemtimePrivilege	2016	AppLaunch.exe
Token: SeProfSingleProcessPrivilege	2016	AppLaunch.exe
Token: SeIncBasePriorityPrivilege	2016	AppLaunch.exe
Token: SeCreatePagefilePrivilege	2016	AppLaunch.exe
Token: SeBackupPrivilege	2016	AppLaunch.exe
Token: SeRestorePrivilege	2016	AppLaunch.exe
Token: SeShutdownPrivilege	2016	AppLaunch.exe
Token: SeDebugPrivilege	2016	AppLaunch.exe
Token: SeSystemEnvironmentPrivilege	2016	AppLaunch.exe
Token: SeChangeNotifyPrivilege	2016	AppLaunch.exe
Token: SeRemoteShutdownPrivilege	2016	AppLaunch.exe
Token: SeUndockPrivilege	2016	AppLaunch.exe
Token: SeManageVolumePrivilege	2016	AppLaunch.exe
Token: SeImpersonatePrivilege	2016	AppLaunch.exe
Token: SeCreateGlobalPrivilege	2016	AppLaunch.exe
Token: 33	2016	AppLaunch.exe
Token: 34	2016	AppLaunch.exe
Token: 35	2016	AppLaunch.exe

Suspicious use of WriteProcessMemory 51 IoCs

Processes:

cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exeAppLaunch.execmd.execmd.exe

description	pid	process	target process
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 1964 wrote to memory of 2016	1964	cb2ba9ccdb9029771747844d79baa1cffdf68239a25396f9641b70eb52f1ddf8.exe	AppLaunch.exe
PID 2016 wrote to memory of 2004	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 2004	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 2004	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 2004	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 2004	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 2004	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 2004	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 1768	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 1768	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 1768	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 1768	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 1768	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 1768	2016	AppLaunch.exe	cmd.exe
PID 2016 wrote to memory of 1768	2016	AppLaunch.exe	cmd.exe
PID 1768 wrote to memory of 700	1768	cmd.exe	attrib.exe
PID 1768 wrote to memory of 700	1768	cmd.exe	attrib.exe
PID 1768 wrote to memory of 700	1768	cmd.exe	attrib.exe
PID 1768 wrote to memory of 700	1768	cmd.exe	attrib.exe
PID 1768 wrote to memory of 700	1768	cmd.exe	attrib.exe
PID 1768 wrote to memory of 700	1768	cmd.exe	attrib.exe
PID 1768 wrote to memory of 700	1768	cmd.exe	attrib.exe
PID 2004 wrote to memory of 520	2004	cmd.exe	attrib.exe
PID 2004 wrote to memory of 520	2004	cmd.exe	attrib.exe
PID 2004 wrote to memory of 520	2004	cmd.exe	attrib.exe
PID 2004 wrote to memory of 520	2004	cmd.exe	attrib.exe
PID 2004 wrote to memory of 520	2004	cmd.exe	attrib.exe
PID 2004 wrote to memory of 520	2004	cmd.exe	attrib.exe
PID 2004 wrote to memory of 520	2004	cmd.exe	attrib.exe
PID 2016 wrote to memory of 384	2016	AppLaunch.exe	msdcsc.exe
PID 2016 wrote to memory of 384	2016	AppLaunch.exe	msdcsc.exe
PID 2016 wrote to memory of 384	2016	AppLaunch.exe	msdcsc.exe
PID 2016 wrote to memory of 384	2016	AppLaunch.exe	msdcsc.exe
PID 2016 wrote to memory of 384	2016	AppLaunch.exe	msdcsc.exe
PID 2016 wrote to memory of 384	2016	AppLaunch.exe	msdcsc.exe
PID 2016 wrote to memory of 384	2016	AppLaunch.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

520 attrib.exe
700 attrib.exe

pid	process
520	attrib.exe
700	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:1964

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
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2016

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:2004

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:520

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpcmd.bat" "
3⤵
- Suspicious use of WriteProcessMemory
PID:1768

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:700

C:\Windows\SysWOW64\WidnowsUpdate\msdcsc.exe
"C:\Windows\system32\WidnowsUpdate\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:384

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

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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
54KB

MD5
0f01571a3e4c71eb4313175aae86488e

SHA1
2ba648afe2cd52edf5f25e304f77d457abf7ac0e

SHA256
8cc51c4c2efc8c6a401aa83a0aeced0925d5d9d2a43192f35561893cdf704022

SHA512
159dfbb7d385bf92f4fc48ca389b89d69f6c2616e90dfa056e725d7da78a3702694a28f9c5cab7b55adc4d4dbd7bfe5d272c8b1c9931e3ac95f6326d74576794

Download Submit
C:\Windows\SysWOW64\WidnowsUpdate\msdcsc.exe
Filesize
54KB

MD5
0f01571a3e4c71eb4313175aae86488e

SHA1
2ba648afe2cd52edf5f25e304f77d457abf7ac0e

SHA256
8cc51c4c2efc8c6a401aa83a0aeced0925d5d9d2a43192f35561893cdf704022

SHA512
159dfbb7d385bf92f4fc48ca389b89d69f6c2616e90dfa056e725d7da78a3702694a28f9c5cab7b55adc4d4dbd7bfe5d272c8b1c9931e3ac95f6326d74576794

Download Submit
\Windows\SysWOW64\WidnowsUpdate\msdcsc.exe
Filesize
54KB

MD5
0f01571a3e4c71eb4313175aae86488e

SHA1
2ba648afe2cd52edf5f25e304f77d457abf7ac0e

SHA256
8cc51c4c2efc8c6a401aa83a0aeced0925d5d9d2a43192f35561893cdf704022

SHA512
159dfbb7d385bf92f4fc48ca389b89d69f6c2616e90dfa056e725d7da78a3702694a28f9c5cab7b55adc4d4dbd7bfe5d272c8b1c9931e3ac95f6326d74576794

Download Submit
memory/384-87-0x0000000000000000-mapping.dmp

Download
memory/520-83-0x0000000000000000-mapping.dmp

Download
memory/700-82-0x0000000000000000-mapping.dmp

Download
memory/1768-78-0x0000000000000000-mapping.dmp

Download
memory/1964-74-0x0000000074970000-0x0000000074F1B000-memory.dmp

Filesize
5.7MB

Download
memory/1964-54-0x0000000076411000-0x0000000076413000-memory.dmp

Filesize
8KB

Download
memory/1964-92-0x0000000074970000-0x0000000074F1B000-memory.dmp

Filesize
5.7MB

Download
memory/2004-77-0x0000000000000000-mapping.dmp

Download
memory/2016-65-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-62-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-76-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-71-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-67-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-69-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-64-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-73-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-60-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-58-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-56-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-55-0x0000000000400000-0x00000000004CB000-memory.dmp

Filesize
812KB

Download
memory/2016-90-0x0000000000401000-0x000000000049F000-memory.dmp

Filesize
632KB

Download
memory/2016-70-0x000000000049F92C-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads