darkcomet | b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964

General

Target

b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Size

814KB
MD5

74230b48a3527617281d77d88a876591
SHA1

eb36e4e7a0a4a18cafe4405988542f3742aee86e
SHA256

b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964
SHA512

b3275c8f4d4069f81ac5467d641ef9fc7b36de8fcdfd97d2e47c22a3c894a494dc143cb4d5a4da85434f9d38a636ea2b31151c06e7d8f32f582fef0497dc9aec
SSDEEP

12288:LifsksSl+IUfUGkk0lzSqfJhUIgWc4S5m48kA+WWgNhUO2NncLBwvgRTGJIKW3/u:eHZUZNaqWHgRRORBwvgRuS/81L

Score

10^/10

darkcomet modiloader server persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Server

C2

thaneveenz.no-ip.biz:1604

Mutex

DC_MUTEX-NZWP5K5

Attributes

InstallPath
Program Files\winupdate\winupdate.exe
gencode
7Jojid436QAA
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
ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Program Files\\winupdate\\winupdate.exe"	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe

ModiLoader Second Stage 3 IoCs

Processes:

resource	yara_rule
C:\Program Files\winupdate\winupdate.exe	modiloader_stage2
C:\Program Files\winupdate\winupdate.exe	modiloader_stage2
C:\Program Files\winupdate\winupdate.exe	modiloader_stage2

Executes dropped EXE 2 IoCs

Processes:

winupdate.exewinupdate.exe

pid process

4148 winupdate.exe
424 winupdate.exe

pid	process
4148	winupdate.exe
424	winupdate.exe

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:

b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

winupdate.exeb4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Program Files\\winupdate\\winupdate.exe"	winupdate.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Program Files\\winupdate\\winupdate.exe"	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exewinupdate.exe

description	pid	process	target process
PID 2620 set thread context of 5068	2620	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
PID 4148 set thread context of 424	4148	winupdate.exe	winupdate.exe

Drops file in Program Files directory 3 IoCs

Processes:

b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe

description	ioc	process
File created	C:\Program Files\winupdate\winupdate.exe	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
File opened for modification	C:\Program Files\winupdate\winupdate.exe	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
File opened for modification	C:\Program Files\winupdate\	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exewinupdate.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeSecurityPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeTakeOwnershipPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeLoadDriverPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeSystemProfilePrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeSystemtimePrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeProfSingleProcessPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeIncBasePriorityPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeCreatePagefilePrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeBackupPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeRestorePrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeShutdownPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeDebugPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeSystemEnvironmentPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeChangeNotifyPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeRemoteShutdownPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeUndockPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeManageVolumePrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeImpersonatePrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeCreateGlobalPrivilege	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: 33	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: 34	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: 35	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: 36	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
Token: SeIncreaseQuotaPrivilege	424	winupdate.exe
Token: SeSecurityPrivilege	424	winupdate.exe
Token: SeTakeOwnershipPrivilege	424	winupdate.exe
Token: SeLoadDriverPrivilege	424	winupdate.exe
Token: SeSystemProfilePrivilege	424	winupdate.exe
Token: SeSystemtimePrivilege	424	winupdate.exe
Token: SeProfSingleProcessPrivilege	424	winupdate.exe
Token: SeIncBasePriorityPrivilege	424	winupdate.exe
Token: SeCreatePagefilePrivilege	424	winupdate.exe
Token: SeBackupPrivilege	424	winupdate.exe
Token: SeRestorePrivilege	424	winupdate.exe
Token: SeShutdownPrivilege	424	winupdate.exe
Token: SeDebugPrivilege	424	winupdate.exe
Token: SeSystemEnvironmentPrivilege	424	winupdate.exe
Token: SeChangeNotifyPrivilege	424	winupdate.exe
Token: SeRemoteShutdownPrivilege	424	winupdate.exe
Token: SeUndockPrivilege	424	winupdate.exe
Token: SeManageVolumePrivilege	424	winupdate.exe
Token: SeImpersonatePrivilege	424	winupdate.exe
Token: SeCreateGlobalPrivilege	424	winupdate.exe
Token: 33	424	winupdate.exe
Token: 34	424	winupdate.exe
Token: 35	424	winupdate.exe
Token: 36	424	winupdate.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

winupdate.exe

pid process

424 winupdate.exe

pid	process
424	winupdate.exe

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exeb4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exewinupdate.exewinupdate.exe

description	pid	process	target process
PID 2620 wrote to memory of 5068	2620	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
PID 2620 wrote to memory of 5068	2620	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
PID 2620 wrote to memory of 5068	2620	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
PID 2620 wrote to memory of 5068	2620	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
PID 2620 wrote to memory of 5068	2620	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
PID 5068 wrote to memory of 4148	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe	winupdate.exe
PID 5068 wrote to memory of 4148	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe	winupdate.exe
PID 5068 wrote to memory of 4148	5068	b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe	winupdate.exe
PID 4148 wrote to memory of 424	4148	winupdate.exe	winupdate.exe
PID 4148 wrote to memory of 424	4148	winupdate.exe	winupdate.exe
PID 4148 wrote to memory of 424	4148	winupdate.exe	winupdate.exe
PID 4148 wrote to memory of 424	4148	winupdate.exe	winupdate.exe
PID 4148 wrote to memory of 424	4148	winupdate.exe	winupdate.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe
PID 424 wrote to memory of 4636	424	winupdate.exe	notepad.exe

C:\Users\Admin\AppData\Local\Temp\b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
"C:\Users\Admin\AppData\Local\Temp\b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2620

C:\Users\Admin\AppData\Local\Temp\b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe
"C:\Users\Admin\AppData\Local\Temp\b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964.exe"
2⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5068

C:\Program Files\winupdate\winupdate.exe
"C:\Program Files\winupdate\winupdate.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4148

C:\Program Files\winupdate\winupdate.exe
"C:\Program Files\winupdate\winupdate.exe"
4⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:424

C:\Windows\SysWOW64\notepad.exe
notepad
5⤵
PID:4636

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files\winupdate\winupdate.exe
Filesize
814KB

MD5
74230b48a3527617281d77d88a876591

SHA1
eb36e4e7a0a4a18cafe4405988542f3742aee86e

SHA256
b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964

SHA512
b3275c8f4d4069f81ac5467d641ef9fc7b36de8fcdfd97d2e47c22a3c894a494dc143cb4d5a4da85434f9d38a636ea2b31151c06e7d8f32f582fef0497dc9aec

Download Submit
C:\Program Files\winupdate\winupdate.exe
Filesize
814KB

MD5
74230b48a3527617281d77d88a876591

SHA1
eb36e4e7a0a4a18cafe4405988542f3742aee86e

SHA256
b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964

SHA512
b3275c8f4d4069f81ac5467d641ef9fc7b36de8fcdfd97d2e47c22a3c894a494dc143cb4d5a4da85434f9d38a636ea2b31151c06e7d8f32f582fef0497dc9aec

Download Submit
C:\Program Files\winupdate\winupdate.exe
Filesize
814KB

MD5
74230b48a3527617281d77d88a876591

SHA1
eb36e4e7a0a4a18cafe4405988542f3742aee86e

SHA256
b4d47dffea5885e4a5a9b7d329949d2523fa6e528d24333f8ef719bbe5d71964

SHA512
b3275c8f4d4069f81ac5467d641ef9fc7b36de8fcdfd97d2e47c22a3c894a494dc143cb4d5a4da85434f9d38a636ea2b31151c06e7d8f32f582fef0497dc9aec

Download Submit
memory/424-140-0x0000000000000000-mapping.dmp

Download
memory/424-146-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/424-147-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/4148-137-0x0000000000000000-mapping.dmp

Download
memory/4636-145-0x0000000000000000-mapping.dmp

Download
memory/5068-135-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/5068-136-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/5068-134-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/5068-133-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/5068-132-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads