darkcomet | 894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75

General

Target

894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe
Size

1.2MB
MD5

8976f3e0aff56ea29bb2cea8fc199e43
SHA1

f7c707b7d1405d75b342a89d07445953b65b1724
SHA256

894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75
SHA512

19af5e522a586e4d1c398bb21d1406c701a06b15a0f467e687bcf4d33650e5cde143532722883e1dbba96511e974354a9292bfe901a4065786947b1a61a88bbd
SSDEEP

12288:vZdjjz8tf5Tdxr0s6rMie0Fy1SNoiH99cM1gDcIBzKocKBEth7B6OwjfHngQRRBU:vZQM8mqJsMOG1Jc6J8U+Hjlz93

Score

10^/10

darkcomet thomas evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Thomas

C2

thomaske19951.no-ip.org:2000

Mutex

DC_MUTEX-ECCAP6P

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
5wK8lbcuWlps
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

T1004

Modify Registry

T1112

Processes:

vbc.exe

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

Drops file in Drivers directory 1 IoCs

Processes:

vbc.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts vbc.exe
Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

4052 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

4680 attrib.exe
4688 attrib.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	vbc.exe

pid	process
4052	msdcsc.exe

pid	process
4680	attrib.exe
4688	attrib.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

vbc.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\\MSDCSC\\msdcsc.exe"	vbc.exe

Drops file in System32 directory 5 IoCs

Processes:

894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exevbc.exe

description	ioc	process
File created	C:\Windows\SysWOW64\Windows\wdt.exe	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe
File opened for modification	C:\Windows\SysWOW64\Windows\wdt.exe	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe
File created	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	vbc.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe

description	pid	process	target process
PID 4708 set thread context of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.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\vbc.exe	attrib.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727	attrib.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

vbc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3972	vbc.exe
Token: SeSecurityPrivilege	3972	vbc.exe
Token: SeTakeOwnershipPrivilege	3972	vbc.exe
Token: SeLoadDriverPrivilege	3972	vbc.exe
Token: SeSystemProfilePrivilege	3972	vbc.exe
Token: SeSystemtimePrivilege	3972	vbc.exe
Token: SeProfSingleProcessPrivilege	3972	vbc.exe
Token: SeIncBasePriorityPrivilege	3972	vbc.exe
Token: SeCreatePagefilePrivilege	3972	vbc.exe
Token: SeBackupPrivilege	3972	vbc.exe
Token: SeRestorePrivilege	3972	vbc.exe
Token: SeShutdownPrivilege	3972	vbc.exe
Token: SeDebugPrivilege	3972	vbc.exe
Token: SeSystemEnvironmentPrivilege	3972	vbc.exe
Token: SeChangeNotifyPrivilege	3972	vbc.exe
Token: SeRemoteShutdownPrivilege	3972	vbc.exe
Token: SeUndockPrivilege	3972	vbc.exe
Token: SeManageVolumePrivilege	3972	vbc.exe
Token: SeImpersonatePrivilege	3972	vbc.exe
Token: SeCreateGlobalPrivilege	3972	vbc.exe
Token: 33	3972	vbc.exe
Token: 34	3972	vbc.exe
Token: 35	3972	vbc.exe
Token: 36	3972	vbc.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exevbc.execmd.execmd.exe

description	pid	process	target process
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 4708 wrote to memory of 3972	4708	894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe	vbc.exe
PID 3972 wrote to memory of 4384	3972	vbc.exe	cmd.exe
PID 3972 wrote to memory of 4384	3972	vbc.exe	cmd.exe
PID 3972 wrote to memory of 4384	3972	vbc.exe	cmd.exe
PID 3972 wrote to memory of 2168	3972	vbc.exe	cmd.exe
PID 3972 wrote to memory of 2168	3972	vbc.exe	cmd.exe
PID 3972 wrote to memory of 2168	3972	vbc.exe	cmd.exe
PID 3972 wrote to memory of 4052	3972	vbc.exe	msdcsc.exe
PID 3972 wrote to memory of 4052	3972	vbc.exe	msdcsc.exe
PID 3972 wrote to memory of 4052	3972	vbc.exe	msdcsc.exe
PID 2168 wrote to memory of 4680	2168	cmd.exe	attrib.exe
PID 2168 wrote to memory of 4680	2168	cmd.exe	attrib.exe
PID 2168 wrote to memory of 4680	2168	cmd.exe	attrib.exe
PID 4384 wrote to memory of 4688	4384	cmd.exe	attrib.exe
PID 4384 wrote to memory of 4688	4384	cmd.exe	attrib.exe
PID 4384 wrote to memory of 4688	4384	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

4680 attrib.exe
4688 attrib.exe

pid	process
4680	attrib.exe
4688	attrib.exe

C:\Users\Admin\AppData\Local\Temp\894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe
"C:\Users\Admin\AppData\Local\Temp\894324d95e7faada875358b1267b1d5644d11c2948a99a107fdfef49c899eb75.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4708

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
2⤵
- Modifies WinLogon for persistence
- Drops file in Drivers directory
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3972

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:4384

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" +s +h
4⤵
- Sets file to hidden
- Drops file in Windows directory
- Views/modifies file attributes
PID:4688

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:2168

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:4680

C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
"C:\Windows\system32\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:4052

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

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

Scripting

1

T1064

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/2168-139-0x0000000000000000-mapping.dmp

Download
memory/3972-133-0x0000000000400000-0x00000000004BD000-memory.dmp

Filesize
756KB

Download
memory/3972-132-0x0000000000000000-mapping.dmp

Download
memory/3972-134-0x0000000000400000-0x00000000004BD000-memory.dmp

Filesize
756KB

Download
memory/3972-135-0x0000000000400000-0x00000000004BD000-memory.dmp

Filesize
756KB

Download
memory/3972-137-0x0000000000400000-0x00000000004BD000-memory.dmp

Filesize
756KB

Download
memory/3972-142-0x0000000000400000-0x00000000004BD000-memory.dmp

Filesize
756KB

Download
memory/4052-140-0x0000000000000000-mapping.dmp

Download
memory/4384-138-0x0000000000000000-mapping.dmp

Download
memory/4680-143-0x0000000000000000-mapping.dmp

Download
memory/4688-144-0x0000000000000000-mapping.dmp

Download
memory/4708-136-0x0000000074D40000-0x00000000752F1000-memory.dmp

Filesize
5.7MB

Download
memory/4708-146-0x0000000074D40000-0x00000000752F1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads