darkcomet | cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8

General

Target

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Size

396KB
MD5

d7f4b00a1c6f756a97bbd409e0e01e28
SHA1

7d0325baff23fc02a924c0033d9ca5205770ab94
SHA256

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8
SHA512

db4454bcc0bc09952ac46dd18aa9a41971c52624394795c84d81625f3ba1a9f484918379d767b97a0dc9a8f232df10e541f232e42f6211e116aadbb09f896911
SSDEEP

6144:yzuqM8bSZzkD9MvPGm7uDwG6tVsa8ez4d6O5Gtl50LyNdsy9eIkZg0ar:j8yE9cuvDkWazhD9dsyMI8cr

Score

10^/10

darkcomet victima evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

victima

C2

critical.zapto.org:1604

Mutex

DC_MUTEX-ADY5V62

Attributes

InstallPath
Windsound\soundloader.exe
gencode
abg2bucWtxxq
install
true
offline_keylogger
true
persistence
false
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:

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.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\\Roaming\\Windsound\\soundloader.exe"	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe

Modifies firewall policy service 2 TTPs 3 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

soundloader.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "0"	soundloader.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	soundloader.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0"	soundloader.exe

Executes dropped EXE 2 IoCs

Processes:

soundloader.exesoundloader.exe

pid process

5060 soundloader.exe
4540 soundloader.exe

pid	process
5060	soundloader.exe
4540	soundloader.exe

UPX packed file 9 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4820-135-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/4820-136-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/4820-137-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/4820-138-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/4820-139-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/4540-149-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/4540-150-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/4540-151-0x0000000000400000-0x00000000004B9000-memory.dmp	upx
behavioral2/memory/4540-152-0x0000000000400000-0x00000000004B9000-memory.dmp	upx

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:

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\Windsound\\soundloader.exe"	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exesoundloader.exe

description	pid	process	target process
PID 4420 set thread context of 4820	4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
PID 5060 set thread context of 4540	5060	soundloader.exe	soundloader.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:

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

soundloader.exe

pid process

4540 soundloader.exe

pid	process
4540	soundloader.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exesoundloader.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeSecurityPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeTakeOwnershipPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeLoadDriverPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeSystemProfilePrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeSystemtimePrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeProfSingleProcessPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeIncBasePriorityPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeCreatePagefilePrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeBackupPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeRestorePrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeShutdownPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeDebugPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeSystemEnvironmentPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeChangeNotifyPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeRemoteShutdownPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeUndockPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeManageVolumePrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeImpersonatePrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeCreateGlobalPrivilege	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: 33	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: 34	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: 35	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: 36	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
Token: SeIncreaseQuotaPrivilege	4540	soundloader.exe
Token: SeSecurityPrivilege	4540	soundloader.exe
Token: SeTakeOwnershipPrivilege	4540	soundloader.exe
Token: SeLoadDriverPrivilege	4540	soundloader.exe
Token: SeSystemProfilePrivilege	4540	soundloader.exe
Token: SeSystemtimePrivilege	4540	soundloader.exe
Token: SeProfSingleProcessPrivilege	4540	soundloader.exe
Token: SeIncBasePriorityPrivilege	4540	soundloader.exe
Token: SeCreatePagefilePrivilege	4540	soundloader.exe
Token: SeBackupPrivilege	4540	soundloader.exe
Token: SeRestorePrivilege	4540	soundloader.exe
Token: SeShutdownPrivilege	4540	soundloader.exe
Token: SeDebugPrivilege	4540	soundloader.exe
Token: SeSystemEnvironmentPrivilege	4540	soundloader.exe
Token: SeChangeNotifyPrivilege	4540	soundloader.exe
Token: SeRemoteShutdownPrivilege	4540	soundloader.exe
Token: SeUndockPrivilege	4540	soundloader.exe
Token: SeManageVolumePrivilege	4540	soundloader.exe
Token: SeImpersonatePrivilege	4540	soundloader.exe
Token: SeCreateGlobalPrivilege	4540	soundloader.exe
Token: 33	4540	soundloader.exe
Token: 34	4540	soundloader.exe
Token: 35	4540	soundloader.exe
Token: 36	4540	soundloader.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exesoundloader.exesoundloader.exe

pid process

4420 cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
5060 soundloader.exe
4540 soundloader.exe

pid	process
4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
5060	soundloader.exe
4540	soundloader.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.execb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exesoundloader.exe

description	pid	process	target process
PID 4420 wrote to memory of 4820	4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
PID 4420 wrote to memory of 4820	4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
PID 4420 wrote to memory of 4820	4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
PID 4420 wrote to memory of 4820	4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
PID 4420 wrote to memory of 4820	4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
PID 4420 wrote to memory of 4820	4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
PID 4420 wrote to memory of 4820	4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
PID 4420 wrote to memory of 4820	4420	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
PID 4820 wrote to memory of 5060	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	soundloader.exe
PID 4820 wrote to memory of 5060	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	soundloader.exe
PID 4820 wrote to memory of 5060	4820	cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe	soundloader.exe
PID 5060 wrote to memory of 4540	5060	soundloader.exe	soundloader.exe
PID 5060 wrote to memory of 4540	5060	soundloader.exe	soundloader.exe
PID 5060 wrote to memory of 4540	5060	soundloader.exe	soundloader.exe
PID 5060 wrote to memory of 4540	5060	soundloader.exe	soundloader.exe
PID 5060 wrote to memory of 4540	5060	soundloader.exe	soundloader.exe
PID 5060 wrote to memory of 4540	5060	soundloader.exe	soundloader.exe
PID 5060 wrote to memory of 4540	5060	soundloader.exe	soundloader.exe
PID 5060 wrote to memory of 4540	5060	soundloader.exe	soundloader.exe

C:\Users\Admin\AppData\Local\Temp\cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
"C:\Users\Admin\AppData\Local\Temp\cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4420

C:\Users\Admin\AppData\Local\Temp\cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.exe
"C:\Users\Admin\AppData\Local\Temp\cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8.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:4820

C:\Users\Admin\AppData\Roaming\Windsound\soundloader.exe
"C:\Users\Admin\AppData\Roaming\Windsound\soundloader.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5060

C:\Users\Admin\AppData\Roaming\Windsound\soundloader.exe
"C:\Users\Admin\AppData\Roaming\Windsound\soundloader.exe"
4⤵
- Modifies firewall policy service
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4540

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Windsound\soundloader.exe
Filesize
396KB

MD5
d7f4b00a1c6f756a97bbd409e0e01e28

SHA1
7d0325baff23fc02a924c0033d9ca5205770ab94

SHA256
cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8

SHA512
db4454bcc0bc09952ac46dd18aa9a41971c52624394795c84d81625f3ba1a9f484918379d767b97a0dc9a8f232df10e541f232e42f6211e116aadbb09f896911

Download Submit
C:\Users\Admin\AppData\Roaming\Windsound\soundloader.exe
Filesize
396KB

MD5
d7f4b00a1c6f756a97bbd409e0e01e28

SHA1
7d0325baff23fc02a924c0033d9ca5205770ab94

SHA256
cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8

SHA512
db4454bcc0bc09952ac46dd18aa9a41971c52624394795c84d81625f3ba1a9f484918379d767b97a0dc9a8f232df10e541f232e42f6211e116aadbb09f896911

Download Submit
C:\Users\Admin\AppData\Roaming\Windsound\soundloader.exe
Filesize
396KB

MD5
d7f4b00a1c6f756a97bbd409e0e01e28

SHA1
7d0325baff23fc02a924c0033d9ca5205770ab94

SHA256
cb15f9234cadbfd951c61339905693f6c8554fa2c89a31028da87774b55870f8

SHA512
db4454bcc0bc09952ac46dd18aa9a41971c52624394795c84d81625f3ba1a9f484918379d767b97a0dc9a8f232df10e541f232e42f6211e116aadbb09f896911

Download Submit
memory/4540-152-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/4540-151-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/4540-150-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/4540-149-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/4540-145-0x0000000000000000-mapping.dmp

Download
memory/4820-137-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/4820-139-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/4820-138-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/4820-134-0x0000000000000000-mapping.dmp

Download
memory/4820-136-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/4820-135-0x0000000000400000-0x00000000004B9000-memory.dmp

Filesize
740KB

Download
memory/5060-140-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads