darkcomet | bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59

General

Target

bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe
Size

452KB
MD5

2e3ab1bbf15e53f6b7157c2d75808562
SHA1

2830a10c16acfb19d06ee71c366f699068507e36
SHA256

bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59
SHA512

ac0c57ef76ce7d06a78f71f1a81335fc110265b7c3f99b1e0ceed332045044fa6442dc02b90c7b248f0381b8628ce0b3956c2a0051f3f6d87e15a93c88f24665
SSDEEP

12288:8mPNiMwOB3vWON7iPsPNIP4Xvfr/6kQCsfbin:8iNizOB/ECK4XvfD+Csbin

Score

10^/10

darkcomet victim evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Victim

C2

jrusse.no-ip.org:5050

Mutex

DC_MUTEX-SANCFCW

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
Xl6PgidaJaTh
install
true
offline_keylogger
true
persistence
true
reg_key
rundll32

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:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	vbc.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

4244 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

1140 attrib.exe
1116 attrib.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
4244	msdcsc.exe

pid	process
1140	attrib.exe
1116	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\rundll32 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe

description pid process target process

PID 728 set thread context of 4392 728 bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe vbc.exe

description	pid	process	target process
PID 728 set thread context of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.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

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

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

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

vbc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4392	vbc.exe
Token: SeSecurityPrivilege	4392	vbc.exe
Token: SeTakeOwnershipPrivilege	4392	vbc.exe
Token: SeLoadDriverPrivilege	4392	vbc.exe
Token: SeSystemProfilePrivilege	4392	vbc.exe
Token: SeSystemtimePrivilege	4392	vbc.exe
Token: SeProfSingleProcessPrivilege	4392	vbc.exe
Token: SeIncBasePriorityPrivilege	4392	vbc.exe
Token: SeCreatePagefilePrivilege	4392	vbc.exe
Token: SeBackupPrivilege	4392	vbc.exe
Token: SeRestorePrivilege	4392	vbc.exe
Token: SeShutdownPrivilege	4392	vbc.exe
Token: SeDebugPrivilege	4392	vbc.exe
Token: SeSystemEnvironmentPrivilege	4392	vbc.exe
Token: SeChangeNotifyPrivilege	4392	vbc.exe
Token: SeRemoteShutdownPrivilege	4392	vbc.exe
Token: SeUndockPrivilege	4392	vbc.exe
Token: SeManageVolumePrivilege	4392	vbc.exe
Token: SeImpersonatePrivilege	4392	vbc.exe
Token: SeCreateGlobalPrivilege	4392	vbc.exe
Token: 33	4392	vbc.exe
Token: 34	4392	vbc.exe
Token: 35	4392	vbc.exe
Token: 36	4392	vbc.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exevbc.execmd.execmd.exe

description	pid	process	target process
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 728 wrote to memory of 4392	728	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 4392 wrote to memory of 2080	4392	vbc.exe	cmd.exe
PID 4392 wrote to memory of 2080	4392	vbc.exe	cmd.exe
PID 4392 wrote to memory of 2080	4392	vbc.exe	cmd.exe
PID 4392 wrote to memory of 1700	4392	vbc.exe	cmd.exe
PID 4392 wrote to memory of 1700	4392	vbc.exe	cmd.exe
PID 4392 wrote to memory of 1700	4392	vbc.exe	cmd.exe
PID 2080 wrote to memory of 1116	2080	cmd.exe	attrib.exe
PID 2080 wrote to memory of 1116	2080	cmd.exe	attrib.exe
PID 2080 wrote to memory of 1116	2080	cmd.exe	attrib.exe
PID 1700 wrote to memory of 1140	1700	cmd.exe	attrib.exe
PID 1700 wrote to memory of 1140	1700	cmd.exe	attrib.exe
PID 1700 wrote to memory of 1140	1700	cmd.exe	attrib.exe
PID 4392 wrote to memory of 4244	4392	vbc.exe	msdcsc.exe
PID 4392 wrote to memory of 4244	4392	vbc.exe	msdcsc.exe
PID 4392 wrote to memory of 4244	4392	vbc.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

1140 attrib.exe
1116 attrib.exe

pid	process
1140	attrib.exe
1116	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe
"C:\Users\Admin\AppData\Local\Temp\bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:728

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:4392

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:2080

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:1116

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:1700

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:1140

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:4244

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:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/728-146-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/728-132-0x0000000074C60000-0x0000000075211000-memory.dmp

Filesize
5.7MB

Download
memory/1116-150-0x0000000000000000-mapping.dmp

Download
memory/1140-151-0x0000000000000000-mapping.dmp

Download
memory/1700-149-0x0000000000000000-mapping.dmp

Download
memory/2080-148-0x0000000000000000-mapping.dmp

Download
memory/4244-152-0x0000000000000000-mapping.dmp

Download
memory/4392-138-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-145-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-144-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-147-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-142-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-141-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-140-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-136-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-135-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-134-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4392-133-0x0000000000000000-mapping.dmp

Download
memory/4392-155-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads