darkcomet | 5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944

General

Target

5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe
Size

943KB
MD5

73bcf2b04c92a924efbf970ee4b51f27
SHA1

9adc5d462452977b5f0a803e909eac78b4b3ae5a
SHA256

5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944
SHA512

4ab52efc47766ea073f5501767f709829a4b178bc5fd823c932c66f57e1a4cf27726ff9c197a662b7dfbe5a21449692da8fcc79f3e95cb313d6969e18af394d5

Score

10^/10

darkcomet sazan evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Sazan

C2

127.0.0.1:1604

Mutex

DC_MUTEX-19R9P6E

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
FExQJU0T6CCU
install
true
offline_keylogger
true
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:

RegAsm.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"	RegAsm.exe

Executes dropped EXE 1 IoCs

Processes:

msdcsc.exe

pid process

3548 msdcsc.exe
Sets file to hidden 1 TTPs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Control Panel\International\Geo\Nation RegAsm.exe

pid	process
3548	msdcsc.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exeRegAsm.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\windows = "/windows\\windows.exe"	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe

description	pid	process	target process
PID 812 set thread context of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe

Drops file in Windows directory 4 IoCs

Processes:

attrib.exe5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exeattrib.exe

description	ioc	process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727	attrib.exe
File created	C:\windows\windows.exe	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe
File opened for modification	C:\windows\windows.exe	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe
File opened for modification	C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe	attrib.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Modifies registry class 1 IoCs

Processes:

RegAsm.exe

description ioc process

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

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

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

RegAsm.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3248	RegAsm.exe
Token: SeSecurityPrivilege	3248	RegAsm.exe
Token: SeTakeOwnershipPrivilege	3248	RegAsm.exe
Token: SeLoadDriverPrivilege	3248	RegAsm.exe
Token: SeSystemProfilePrivilege	3248	RegAsm.exe
Token: SeSystemtimePrivilege	3248	RegAsm.exe
Token: SeProfSingleProcessPrivilege	3248	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3248	RegAsm.exe
Token: SeCreatePagefilePrivilege	3248	RegAsm.exe
Token: SeBackupPrivilege	3248	RegAsm.exe
Token: SeRestorePrivilege	3248	RegAsm.exe
Token: SeShutdownPrivilege	3248	RegAsm.exe
Token: SeDebugPrivilege	3248	RegAsm.exe
Token: SeSystemEnvironmentPrivilege	3248	RegAsm.exe
Token: SeChangeNotifyPrivilege	3248	RegAsm.exe
Token: SeRemoteShutdownPrivilege	3248	RegAsm.exe
Token: SeUndockPrivilege	3248	RegAsm.exe
Token: SeManageVolumePrivilege	3248	RegAsm.exe
Token: SeImpersonatePrivilege	3248	RegAsm.exe
Token: SeCreateGlobalPrivilege	3248	RegAsm.exe
Token: 33	3248	RegAsm.exe
Token: 34	3248	RegAsm.exe
Token: 35	3248	RegAsm.exe
Token: 36	3248	RegAsm.exe

Suspicious use of WriteProcessMemory 44 IoCs

Processes:

5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exeRegAsm.execmd.execmd.exe

description	pid	process	target process
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 812 wrote to memory of 3248	812	5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe	RegAsm.exe
PID 3248 wrote to memory of 2916	3248	RegAsm.exe	cmd.exe
PID 3248 wrote to memory of 2916	3248	RegAsm.exe	cmd.exe
PID 3248 wrote to memory of 2916	3248	RegAsm.exe	cmd.exe
PID 3248 wrote to memory of 2928	3248	RegAsm.exe	cmd.exe
PID 3248 wrote to memory of 2928	3248	RegAsm.exe	cmd.exe
PID 3248 wrote to memory of 2928	3248	RegAsm.exe	cmd.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 3248 wrote to memory of 2732	3248	RegAsm.exe	notepad.exe
PID 2928 wrote to memory of 3872	2928	cmd.exe	attrib.exe
PID 2928 wrote to memory of 3872	2928	cmd.exe	attrib.exe
PID 2928 wrote to memory of 3872	2928	cmd.exe	attrib.exe
PID 2916 wrote to memory of 2120	2916	cmd.exe	attrib.exe
PID 2916 wrote to memory of 2120	2916	cmd.exe	attrib.exe
PID 2916 wrote to memory of 2120	2916	cmd.exe	attrib.exe
PID 3248 wrote to memory of 3548	3248	RegAsm.exe	msdcsc.exe
PID 3248 wrote to memory of 3548	3248	RegAsm.exe	msdcsc.exe
PID 3248 wrote to memory of 3548	3248	RegAsm.exe	msdcsc.exe

Views/modifies file attributes 1 TTPs 2 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exe

pid process

2120 attrib.exe
3872 attrib.exe

pid	process
2120	attrib.exe
3872	attrib.exe

C:\Users\Admin\AppData\Local\Temp\5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe
"C:\Users\Admin\AppData\Local\Temp\5270cd6488da8841fbe6f1fa6b91f7b27be14bfcd52d1f2f3925cc2973ef4944.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:812

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
2⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3248

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /k attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe" +s +h
3⤵
- Suspicious use of WriteProcessMemory
PID:2916

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe" +s +h
4⤵
- Drops file in Windows directory
- Views/modifies file attributes
PID:2120

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:2928

C:\Windows\SysWOW64\attrib.exe
attrib "C:\Windows\Microsoft.NET\Framework\v2.0.50727" +s +h
4⤵
- Drops file in Windows directory
- Views/modifies file attributes
PID:3872

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:2732

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:3548

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

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

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
MD5
2b1a3a3fcf0717af55696df58471ab53

SHA1
f3bac5265a01f896fede7440a278ad1814c4ed01

SHA256
8790792d4f545683ed8ae9ed05f5d80df9666fd8f115987c330b82abd3b89222

SHA512
055bea3475a2039ea511e5e7aced6d23f9ccaa3f9f4042f0a7a4014f91b71a42d087cd8292d47d8869f73e04a1dcf5bbcdd43341e84305046f29447eb5fcd7be

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
MD5
2b1a3a3fcf0717af55696df58471ab53

SHA1
f3bac5265a01f896fede7440a278ad1814c4ed01

SHA256
8790792d4f545683ed8ae9ed05f5d80df9666fd8f115987c330b82abd3b89222

SHA512
055bea3475a2039ea511e5e7aced6d23f9ccaa3f9f4042f0a7a4014f91b71a42d087cd8292d47d8869f73e04a1dcf5bbcdd43341e84305046f29447eb5fcd7be

Download Submit
memory/2120-13-0x0000000000000000-mapping.dmp

Download
memory/2732-10-0x00000000030E0000-0x00000000030E1000-memory.dmp

Filesize
4KB

Download
memory/2732-9-0x0000000000000000-mapping.dmp

Download
memory/2732-11-0x0000000000000000-mapping.dmp

Download
memory/2916-7-0x0000000000000000-mapping.dmp

Download
memory/2928-8-0x0000000000000000-mapping.dmp

Download
memory/3248-4-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3248-6-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3248-5-0x000000000048F888-mapping.dmp

Download
memory/3548-14-0x0000000000000000-mapping.dmp

Download
memory/3872-12-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads