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

1540 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

1808 attrib.exe
1584 attrib.exe

pid	process
1540	msdcsc.exe

pid	process
1808	attrib.exe
1584	attrib.exe

UPX packed file 8 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1628-56-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/1628-58-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/1628-60-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/1628-62-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/1628-65-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/1628-66-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/1628-67-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/1628-78-0x0000000000400000-0x00000000004E8000-memory.dmp	upx

Loads dropped DLL 1 IoCs

Processes:

vbc.exe

pid process

1628 vbc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
1628	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-1-5-21-4063495947-34355257-727531523-1000\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 1168 set thread context of 1628	1168	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	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	1628	vbc.exe
Token: SeSecurityPrivilege	1628	vbc.exe
Token: SeTakeOwnershipPrivilege	1628	vbc.exe
Token: SeLoadDriverPrivilege	1628	vbc.exe
Token: SeSystemProfilePrivilege	1628	vbc.exe
Token: SeSystemtimePrivilege	1628	vbc.exe
Token: SeProfSingleProcessPrivilege	1628	vbc.exe
Token: SeIncBasePriorityPrivilege	1628	vbc.exe
Token: SeCreatePagefilePrivilege	1628	vbc.exe
Token: SeBackupPrivilege	1628	vbc.exe
Token: SeRestorePrivilege	1628	vbc.exe
Token: SeShutdownPrivilege	1628	vbc.exe
Token: SeDebugPrivilege	1628	vbc.exe
Token: SeSystemEnvironmentPrivilege	1628	vbc.exe
Token: SeChangeNotifyPrivilege	1628	vbc.exe
Token: SeRemoteShutdownPrivilege	1628	vbc.exe
Token: SeUndockPrivilege	1628	vbc.exe
Token: SeManageVolumePrivilege	1628	vbc.exe
Token: SeImpersonatePrivilege	1628	vbc.exe
Token: SeCreateGlobalPrivilege	1628	vbc.exe
Token: 33	1628	vbc.exe
Token: 34	1628	vbc.exe
Token: 35	1628	vbc.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exevbc.execmd.execmd.exe

description	pid	process	target process
PID 1168 wrote to memory of 1628	1168	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1168 wrote to memory of 1628	1168	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1168 wrote to memory of 1628	1168	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1168 wrote to memory of 1628	1168	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1168 wrote to memory of 1628	1168	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1168 wrote to memory of 1628	1168	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1168 wrote to memory of 1628	1168	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1168 wrote to memory of 1628	1168	b79e1b1c27f4d27629213c9cd6b348507e201a175f9e88b631a8fd51323311b4.exe	vbc.exe
PID 1628 wrote to memory of 1888	1628	vbc.exe	cmd.exe
PID 1628 wrote to memory of 1888	1628	vbc.exe	cmd.exe
PID 1628 wrote to memory of 1888	1628	vbc.exe	cmd.exe
PID 1628 wrote to memory of 1888	1628	vbc.exe	cmd.exe
PID 1628 wrote to memory of 1780	1628	vbc.exe	cmd.exe
PID 1628 wrote to memory of 1780	1628	vbc.exe	cmd.exe
PID 1628 wrote to memory of 1780	1628	vbc.exe	cmd.exe
PID 1628 wrote to memory of 1780	1628	vbc.exe	cmd.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1628 wrote to memory of 1936	1628	vbc.exe	notepad.exe
PID 1888 wrote to memory of 1808	1888	cmd.exe	attrib.exe
PID 1888 wrote to memory of 1808	1888	cmd.exe	attrib.exe
PID 1888 wrote to memory of 1808	1888	cmd.exe	attrib.exe
PID 1888 wrote to memory of 1808	1888	cmd.exe	attrib.exe
PID 1780 wrote to memory of 1584	1780	cmd.exe	attrib.exe
PID 1780 wrote to memory of 1584	1780	cmd.exe	attrib.exe
PID 1780 wrote to memory of 1584	1780	cmd.exe	attrib.exe
PID 1780 wrote to memory of 1584	1780	cmd.exe	attrib.exe
PID 1628 wrote to memory of 1540	1628	vbc.exe	msdcsc.exe
PID 1628 wrote to memory of 1540	1628	vbc.exe	msdcsc.exe
PID 1628 wrote to memory of 1540	1628	vbc.exe	msdcsc.exe
PID 1628 wrote to memory of 1540	1628	vbc.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

1808 attrib.exe
1584 attrib.exe

pid	process
1808	attrib.exe
1584	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:1168

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:1628

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:1888

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:1808

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:1780

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:1584

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:1936

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:1540

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
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

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

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

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

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/1168-64-0x0000000074720000-0x0000000074CCB000-memory.dmp

Filesize
5.7MB

Download
memory/1168-54-0x00000000760E1000-0x00000000760E3000-memory.dmp

Filesize
8KB

Download
memory/1540-75-0x0000000000000000-mapping.dmp

Download
memory/1584-73-0x0000000000000000-mapping.dmp

Download
memory/1628-67-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1628-58-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1628-66-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1628-62-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1628-78-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1628-55-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1628-56-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1628-61-0x00000000004CD910-mapping.dmp

Download
memory/1628-65-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1628-60-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/1780-69-0x0000000000000000-mapping.dmp

Download
memory/1808-72-0x0000000000000000-mapping.dmp

Download
memory/1888-68-0x0000000000000000-mapping.dmp

Download
memory/1936-70-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads