darkcomet | daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1

General

Target

daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe
Size

1.2MB
MD5

2d1552fc4d7061d7ff2d0bb329f93e70
SHA1

cda6295ea30076e323b49405be0e61319d037e69
SHA256

daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1
SHA512

b544a1cdaa9ab1a30ba5f888ecdec0c4336ff7abde5b60ec0080c4ef9ed86d1902ee752f2e46fa7b6182a4ace735905ac3aa0c716ea38a1f7610736b531643b9
SSDEEP

12288:RjFPs8PRJ7xEhU4X2EV+luiIPBLX8eI+LchMP+8uQBiJSKfK5tjZAp6q8g/6PmSJ:nZrAIIMqhPZ5IZGZcUYw62mY

Score

10^/10

darkcomet zombk evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

zombk

C2

zombk.no-ip.org:1500

127.0.0.1:1500

192.168.1.43:1500

Mutex

DC_MUTEX-DR20D9S

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
2hEkSK4e2CCs
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:\\MSDCSC\\msdcsc.exe"	vbc.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

2980 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

4668 attrib.exe
4628 attrib.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
2980	msdcsc.exe

pid	process
4668	attrib.exe
4628	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-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe

description	pid	process	target process
PID 2912 set thread context of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.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

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Modifies registry class 1 IoCs

Processes:

vbc.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ vbc.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe

pid process

2912 daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe

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

pid	process
2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe

Suspicious use of AdjustPrivilegeToken 29 IoCs

Processes:

daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exevbc.exedw20.exe

description	pid	process
Token: SeDebugPrivilege	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe
Token: SeIncreaseQuotaPrivilege	4420	vbc.exe
Token: SeSecurityPrivilege	4420	vbc.exe
Token: SeTakeOwnershipPrivilege	4420	vbc.exe
Token: SeLoadDriverPrivilege	4420	vbc.exe
Token: SeSystemProfilePrivilege	4420	vbc.exe
Token: SeSystemtimePrivilege	4420	vbc.exe
Token: SeProfSingleProcessPrivilege	4420	vbc.exe
Token: SeIncBasePriorityPrivilege	4420	vbc.exe
Token: SeCreatePagefilePrivilege	4420	vbc.exe
Token: SeBackupPrivilege	4420	vbc.exe
Token: SeRestorePrivilege	4420	vbc.exe
Token: SeShutdownPrivilege	4420	vbc.exe
Token: SeDebugPrivilege	4420	vbc.exe
Token: SeSystemEnvironmentPrivilege	4420	vbc.exe
Token: SeChangeNotifyPrivilege	4420	vbc.exe
Token: SeRemoteShutdownPrivilege	4420	vbc.exe
Token: SeUndockPrivilege	4420	vbc.exe
Token: SeManageVolumePrivilege	4420	vbc.exe
Token: SeImpersonatePrivilege	4420	vbc.exe
Token: SeCreateGlobalPrivilege	4420	vbc.exe
Token: 33	4420	vbc.exe
Token: 34	4420	vbc.exe
Token: 35	4420	vbc.exe
Token: 36	4420	vbc.exe
Token: SeRestorePrivilege	4568	dw20.exe
Token: SeBackupPrivilege	4568	dw20.exe
Token: SeBackupPrivilege	4568	dw20.exe
Token: SeBackupPrivilege	4568	dw20.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exevbc.execmd.execmd.exe

description	pid	process	target process
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4420	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	vbc.exe
PID 2912 wrote to memory of 4568	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	dw20.exe
PID 2912 wrote to memory of 4568	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	dw20.exe
PID 2912 wrote to memory of 4568	2912	daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe	dw20.exe
PID 4420 wrote to memory of 912	4420	vbc.exe	cmd.exe
PID 4420 wrote to memory of 912	4420	vbc.exe	cmd.exe
PID 4420 wrote to memory of 912	4420	vbc.exe	cmd.exe
PID 4420 wrote to memory of 1448	4420	vbc.exe	cmd.exe
PID 4420 wrote to memory of 1448	4420	vbc.exe	cmd.exe
PID 4420 wrote to memory of 1448	4420	vbc.exe	cmd.exe
PID 912 wrote to memory of 4668	912	cmd.exe	attrib.exe
PID 912 wrote to memory of 4668	912	cmd.exe	attrib.exe
PID 912 wrote to memory of 4668	912	cmd.exe	attrib.exe
PID 1448 wrote to memory of 4628	1448	cmd.exe	attrib.exe
PID 1448 wrote to memory of 4628	1448	cmd.exe	attrib.exe
PID 1448 wrote to memory of 4628	1448	cmd.exe	attrib.exe
PID 4420 wrote to memory of 2980	4420	vbc.exe	msdcsc.exe
PID 4420 wrote to memory of 2980	4420	vbc.exe	msdcsc.exe
PID 4420 wrote to memory of 2980	4420	vbc.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

4668 attrib.exe
4628 attrib.exe

pid	process
4668	attrib.exe
4628	attrib.exe

C:\Users\Admin\AppData\Local\Temp\daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe
"C:\Users\Admin\AppData\Local\Temp\daf153c8c96b58f17b27eaa1b7940323b85ddfe059991a5ed8d57b750aaf17f1.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2912

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
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4420

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:912

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:4668

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:1448

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:4628

C:\MSDCSC\msdcsc.exe
"C:\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:2980

C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
dw20.exe -x -s 1472
2⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:4568

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

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

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

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/912-140-0x0000000000000000-mapping.dmp

Download
memory/1448-141-0x0000000000000000-mapping.dmp

Download
memory/2912-133-0x0000000075440000-0x00000000759F1000-memory.dmp

Filesize
5.7MB

Download
memory/2912-132-0x0000000075440000-0x00000000759F1000-memory.dmp

Filesize
5.7MB

Download
memory/2912-142-0x0000000075440000-0x00000000759F1000-memory.dmp

Filesize
5.7MB

Download
memory/2980-145-0x0000000000000000-mapping.dmp

Download
memory/4420-136-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/4420-138-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/4420-137-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/4420-135-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/4420-134-0x0000000000000000-mapping.dmp

Download
memory/4420-148-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/4568-139-0x0000000000000000-mapping.dmp

Download
memory/4628-144-0x0000000000000000-mapping.dmp

Download
memory/4668-143-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads