darkcomet | b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4

General

Target

b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe
Size

474KB
MD5

10d8db9c89b6b8d766a899da925517ae
SHA1

a7749810330ac5e76896eabe72fafa1b28924913
SHA256

b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4
SHA512

763badf29a6554542aa8974e609a8d09e21a3ee535e5156977c06616071a70b1b1f2d4d3aa47ebf0713dbb847b56764b831495e9b148d02493651dd5977a6c26
SSDEEP

12288:C2LVSjLqDJZMQzzdrikNOQsLr3dP7/JkHlpAuuVP427tDGTz:FLg29+QFriPQsLDhrJ2A5Vw27tqTz

Score

10^/10

darkcomet guest16 evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

hellobhaiji.no-ip.org:1604

Mutex

DC_MUTEX-SE6LJZ8

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
mlhnz99gxBf3
install
true
offline_keylogger
true
password
123456789
persistence
true
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:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

4032 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

2452 attrib.exe
4068 attrib.exe

pid	process
4032	msdcsc.exe

pid	process
2452	attrib.exe
4068	attrib.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/676-133-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/676-134-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/676-135-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/676-137-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/676-138-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral2/memory/676-148-0x0000000000400000-0x00000000004E8000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

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-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe

description pid process target process

PID 1612 set thread context of 676 1612 b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe vbc.exe

description	pid	process	target process
PID 1612 set thread context of 676	1612	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.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	676	vbc.exe
Token: SeSecurityPrivilege	676	vbc.exe
Token: SeTakeOwnershipPrivilege	676	vbc.exe
Token: SeLoadDriverPrivilege	676	vbc.exe
Token: SeSystemProfilePrivilege	676	vbc.exe
Token: SeSystemtimePrivilege	676	vbc.exe
Token: SeProfSingleProcessPrivilege	676	vbc.exe
Token: SeIncBasePriorityPrivilege	676	vbc.exe
Token: SeCreatePagefilePrivilege	676	vbc.exe
Token: SeBackupPrivilege	676	vbc.exe
Token: SeRestorePrivilege	676	vbc.exe
Token: SeShutdownPrivilege	676	vbc.exe
Token: SeDebugPrivilege	676	vbc.exe
Token: SeSystemEnvironmentPrivilege	676	vbc.exe
Token: SeChangeNotifyPrivilege	676	vbc.exe
Token: SeRemoteShutdownPrivilege	676	vbc.exe
Token: SeUndockPrivilege	676	vbc.exe
Token: SeManageVolumePrivilege	676	vbc.exe
Token: SeImpersonatePrivilege	676	vbc.exe
Token: SeCreateGlobalPrivilege	676	vbc.exe
Token: 33	676	vbc.exe
Token: 34	676	vbc.exe
Token: 35	676	vbc.exe
Token: 36	676	vbc.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exevbc.execmd.execmd.exe

description	pid	process	target process
PID 1612 wrote to memory of 676	1612	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1612 wrote to memory of 676	1612	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1612 wrote to memory of 676	1612	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1612 wrote to memory of 676	1612	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1612 wrote to memory of 676	1612	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1612 wrote to memory of 676	1612	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1612 wrote to memory of 676	1612	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1612 wrote to memory of 676	1612	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 676 wrote to memory of 2196	676	vbc.exe	cmd.exe
PID 676 wrote to memory of 2196	676	vbc.exe	cmd.exe
PID 676 wrote to memory of 2196	676	vbc.exe	cmd.exe
PID 676 wrote to memory of 1332	676	vbc.exe	cmd.exe
PID 676 wrote to memory of 1332	676	vbc.exe	cmd.exe
PID 676 wrote to memory of 1332	676	vbc.exe	cmd.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 676 wrote to memory of 3492	676	vbc.exe	notepad.exe
PID 2196 wrote to memory of 2452	2196	cmd.exe	attrib.exe
PID 2196 wrote to memory of 2452	2196	cmd.exe	attrib.exe
PID 2196 wrote to memory of 2452	2196	cmd.exe	attrib.exe
PID 1332 wrote to memory of 4068	1332	cmd.exe	attrib.exe
PID 1332 wrote to memory of 4068	1332	cmd.exe	attrib.exe
PID 1332 wrote to memory of 4068	1332	cmd.exe	attrib.exe
PID 676 wrote to memory of 4032	676	vbc.exe	msdcsc.exe
PID 676 wrote to memory of 4032	676	vbc.exe	msdcsc.exe
PID 676 wrote to memory of 4032	676	vbc.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

2452 attrib.exe
4068 attrib.exe

pid	process
2452	attrib.exe
4068	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe
"C:\Users\Admin\AppData\Local\Temp\b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1612

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:676

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:2196

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:2452

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:1332

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:4068

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:3492

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:4032

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\Documents\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

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

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/676-133-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/676-134-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/676-135-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/676-137-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/676-138-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/676-132-0x0000000000000000-mapping.dmp

Download
memory/676-148-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1332-141-0x0000000000000000-mapping.dmp

Download
memory/1612-136-0x00000000748F0000-0x0000000074EA1000-memory.dmp

Filesize
5.7MB

Download
memory/1612-139-0x00000000748F0000-0x0000000074EA1000-memory.dmp

Filesize
5.7MB

Download
memory/2196-140-0x0000000000000000-mapping.dmp

Download
memory/2452-143-0x0000000000000000-mapping.dmp

Download
memory/3492-142-0x0000000000000000-mapping.dmp

Download
memory/4032-145-0x0000000000000000-mapping.dmp

Download
memory/4068-144-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads