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

1992 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

920 attrib.exe
108 attrib.exe
Loads dropped DLL 1 IoCs

Processes:

vbc.exe

pid process

672 vbc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
1992	msdcsc.exe

pid	process
920	attrib.exe
108	attrib.exe

pid	process
672	vbc.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-1-5-21-3385717845-2518323428-350143044-1000\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 1352 set thread context of 672 1352 bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe vbc.exe

description	pid	process	target process
PID 1352 set thread context of 672	1352	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	attrib.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe	attrib.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

Processes:

vbc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	672	vbc.exe
Token: SeSecurityPrivilege	672	vbc.exe
Token: SeTakeOwnershipPrivilege	672	vbc.exe
Token: SeLoadDriverPrivilege	672	vbc.exe
Token: SeSystemProfilePrivilege	672	vbc.exe
Token: SeSystemtimePrivilege	672	vbc.exe
Token: SeProfSingleProcessPrivilege	672	vbc.exe
Token: SeIncBasePriorityPrivilege	672	vbc.exe
Token: SeCreatePagefilePrivilege	672	vbc.exe
Token: SeBackupPrivilege	672	vbc.exe
Token: SeRestorePrivilege	672	vbc.exe
Token: SeShutdownPrivilege	672	vbc.exe
Token: SeDebugPrivilege	672	vbc.exe
Token: SeSystemEnvironmentPrivilege	672	vbc.exe
Token: SeChangeNotifyPrivilege	672	vbc.exe
Token: SeRemoteShutdownPrivilege	672	vbc.exe
Token: SeUndockPrivilege	672	vbc.exe
Token: SeManageVolumePrivilege	672	vbc.exe
Token: SeImpersonatePrivilege	672	vbc.exe
Token: SeCreateGlobalPrivilege	672	vbc.exe
Token: 33	672	vbc.exe
Token: 34	672	vbc.exe
Token: 35	672	vbc.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exevbc.execmd.execmd.exe

description	pid	process	target process
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 1352 wrote to memory of 672	1352	bc7f0ec83577f07d0e4238401dc0e4f09d1d23bc45b05dd6cf59e60a9e51db59.exe	vbc.exe
PID 672 wrote to memory of 1152	672	vbc.exe	cmd.exe
PID 672 wrote to memory of 1152	672	vbc.exe	cmd.exe
PID 672 wrote to memory of 1152	672	vbc.exe	cmd.exe
PID 672 wrote to memory of 1152	672	vbc.exe	cmd.exe
PID 672 wrote to memory of 392	672	vbc.exe	cmd.exe
PID 672 wrote to memory of 392	672	vbc.exe	cmd.exe
PID 672 wrote to memory of 392	672	vbc.exe	cmd.exe
PID 672 wrote to memory of 392	672	vbc.exe	cmd.exe
PID 392 wrote to memory of 108	392	cmd.exe	attrib.exe
PID 392 wrote to memory of 108	392	cmd.exe	attrib.exe
PID 392 wrote to memory of 108	392	cmd.exe	attrib.exe
PID 392 wrote to memory of 108	392	cmd.exe	attrib.exe
PID 1152 wrote to memory of 920	1152	cmd.exe	attrib.exe
PID 1152 wrote to memory of 920	1152	cmd.exe	attrib.exe
PID 1152 wrote to memory of 920	1152	cmd.exe	attrib.exe
PID 1152 wrote to memory of 920	1152	cmd.exe	attrib.exe
PID 672 wrote to memory of 1992	672	vbc.exe	msdcsc.exe
PID 672 wrote to memory of 1992	672	vbc.exe	msdcsc.exe
PID 672 wrote to memory of 1992	672	vbc.exe	msdcsc.exe
PID 672 wrote to memory of 1992	672	vbc.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

920 attrib.exe
108 attrib.exe

pid	process
920	attrib.exe
108	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:1352

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
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:672

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:1152

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:920

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:392

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:108

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe
"C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:1992

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Scripting

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

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

Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
\Users\Admin\AppData\Local\Temp\MSDCSC\msdcsc.exe

Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/108-88-0x0000000000000000-mapping.dmp

Download
memory/392-87-0x0000000000000000-mapping.dmp

Download
memory/672-65-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-59-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-69-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-72-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-75-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-78-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-80-0x000000000048F888-mapping.dmp

Download
memory/672-81-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-83-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-94-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-85-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-56-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-62-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/672-57-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/920-89-0x0000000000000000-mapping.dmp

Download
memory/1152-86-0x0000000000000000-mapping.dmp

Download
memory/1352-54-0x0000000075931000-0x0000000075933000-memory.dmp

Filesize
8KB

Download
memory/1352-55-0x0000000074BC0000-0x000000007516B000-memory.dmp

Filesize
5.7MB

Download
memory/1352-84-0x0000000074BC0000-0x000000007516B000-memory.dmp

Filesize
5.7MB

Download
memory/1992-91-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads