darkcomet | 7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93

General

Target

7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe
Size

328KB
MD5

5a6770a663b5125240a78424db7a74f2
SHA1

b3f3615b2e3c7b04fa904ce893644b9de65f9395
SHA256

7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93
SHA512

58bfc1a02760d14ac63e4a9c8a06430a1a2adca1608fba10d8be59e34db03e51cf8ebbb6b7e016fd932506af7246da501b5ea0a1f6ab4e6aa78b32ad106aa5ad
SSDEEP

6144:umYnW1JAtWAwM0bWQLM0D0B+Gs4Jc+UO5EBGprbDGwBuUPN:KW1JuWm0bRw+NTO5JRPGwBrV

Score

10^/10

darkcomet backup persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

BackUp

C2

185.17.1.54:9002

Mutex

WindowsBackUpMgr

Attributes

gencode
VzVqX1p6FUzg
install
false
offline_keylogger
true
password
redblood1
persistence
false

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Executes dropped EXE 3 IoCs

Processes:

winlogon.exewinlogon.execsrss.exe

pid process

4964 winlogon.exe
1224 winlogon.exe
4912 csrss.exe

pid	process
4964	winlogon.exe
1224	winlogon.exe
4912	csrss.exe

UPX packed file 8 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1224-140-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/1224-141-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/1224-142-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/1224-148-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/1224-150-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/1224-151-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/1224-152-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/1224-157-0x0000000000400000-0x00000000004B7000-memory.dmp	upx

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exewinlogon.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	winlogon.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

winlogon.execsrss.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\sgbcsvbadfvbdfvasdf\\Tsdfadsvsfsdfs\\winlogon.exe"	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\sgbcsvbadfvbdfvasdf\\Tsdfadsvsfsdfs\\winlogon.exe"	winlogon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\sgbcsvbadfvbdfvasdf\\Tsdfadsvsfsdfs\\winlogon.exe"	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\sgbcsvbadfvbdfvasdf\\Tsdfadsvsfsdfs\\winlogon.exe"	csrss.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

winlogon.exe

description pid process target process

PID 4964 set thread context of 1224 4964 winlogon.exe winlogon.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:

winlogon.exe

description ioc process

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

description	pid	process	target process
PID 4964 set thread context of 1224	4964	winlogon.exe	winlogon.exe

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

NTFS ADS 4 IoCs

Processes:

7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.execmd.exewinlogon.execmd.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe\:ZONE.identifier:$DATA	7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe:ZONE.identifier	cmd.exe
File created	C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\csrss.exe\:ZONE.identifier:$DATA	winlogon.exe
File created	C:\Users\Admin\AppData\Local\Temp\7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe:ZONE.identifier	cmd.exe

Suspicious behavior: EnumeratesProcesses 63 IoCs

Processes:

csrss.exe

pid	process
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe
4912	csrss.exe

Suspicious use of AdjustPrivilegeToken 25 IoCs

Processes:

winlogon.execsrss.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1224	winlogon.exe
Token: SeSecurityPrivilege	1224	winlogon.exe
Token: SeTakeOwnershipPrivilege	1224	winlogon.exe
Token: SeLoadDriverPrivilege	1224	winlogon.exe
Token: SeSystemProfilePrivilege	1224	winlogon.exe
Token: SeSystemtimePrivilege	1224	winlogon.exe
Token: SeProfSingleProcessPrivilege	1224	winlogon.exe
Token: SeIncBasePriorityPrivilege	1224	winlogon.exe
Token: SeCreatePagefilePrivilege	1224	winlogon.exe
Token: SeBackupPrivilege	1224	winlogon.exe
Token: SeRestorePrivilege	1224	winlogon.exe
Token: SeShutdownPrivilege	1224	winlogon.exe
Token: SeDebugPrivilege	1224	winlogon.exe
Token: SeSystemEnvironmentPrivilege	1224	winlogon.exe
Token: SeChangeNotifyPrivilege	1224	winlogon.exe
Token: SeRemoteShutdownPrivilege	1224	winlogon.exe
Token: SeUndockPrivilege	1224	winlogon.exe
Token: SeManageVolumePrivilege	1224	winlogon.exe
Token: SeImpersonatePrivilege	1224	winlogon.exe
Token: SeCreateGlobalPrivilege	1224	winlogon.exe
Token: 33	1224	winlogon.exe
Token: 34	1224	winlogon.exe
Token: 35	1224	winlogon.exe
Token: 36	1224	winlogon.exe
Token: SeDebugPrivilege	4912	csrss.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

winlogon.exe

pid process

1224 winlogon.exe

pid	process
1224	winlogon.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exewinlogon.exe

description	pid	process	target process
PID 2264 wrote to memory of 4480	2264	7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe	cmd.exe
PID 2264 wrote to memory of 4480	2264	7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe	cmd.exe
PID 2264 wrote to memory of 4964	2264	7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe	winlogon.exe
PID 2264 wrote to memory of 4964	2264	7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe	winlogon.exe
PID 4964 wrote to memory of 3268	4964	winlogon.exe	cmd.exe
PID 4964 wrote to memory of 3268	4964	winlogon.exe	cmd.exe
PID 4964 wrote to memory of 1224	4964	winlogon.exe	winlogon.exe
PID 4964 wrote to memory of 1224	4964	winlogon.exe	winlogon.exe
PID 4964 wrote to memory of 1224	4964	winlogon.exe	winlogon.exe
PID 4964 wrote to memory of 1224	4964	winlogon.exe	winlogon.exe
PID 4964 wrote to memory of 1224	4964	winlogon.exe	winlogon.exe
PID 4964 wrote to memory of 1224	4964	winlogon.exe	winlogon.exe
PID 4964 wrote to memory of 1224	4964	winlogon.exe	winlogon.exe
PID 4964 wrote to memory of 1224	4964	winlogon.exe	winlogon.exe
PID 4964 wrote to memory of 4912	4964	winlogon.exe	csrss.exe
PID 4964 wrote to memory of 4912	4964	winlogon.exe	csrss.exe

C:\Users\Admin\AppData\Local\Temp\7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe
"C:\Users\Admin\AppData\Local\Temp\7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe"
1⤵
- Checks computer location settings
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:2264

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c echo [zoneTransfer]ZoneID = 2 > "C:\Users\Admin\AppData\Local\Temp\7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe":ZONE.identifier & exit
2⤵
- NTFS ADS
PID:4480

C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe
"C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe"
2⤵
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Modifies registry class
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:4964

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c echo [zoneTransfer]ZoneID = 2 > "C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe":ZONE.identifier & exit
3⤵
- NTFS ADS
PID:3268

C:\Users\Admin\AppData\Roaming\winlogon.exe
"C:\Users\Admin\AppData\Roaming\winlogon.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1224

C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\csrss.exe
"C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\csrss.exe" -reg C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe -proc 1224 C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe
3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4912

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

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\Local\Temp\7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93.exe
Filesize
328KB

MD5
5a6770a663b5125240a78424db7a74f2

SHA1
b3f3615b2e3c7b04fa904ce893644b9de65f9395

SHA256
7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93

SHA512
58bfc1a02760d14ac63e4a9c8a06430a1a2adca1608fba10d8be59e34db03e51cf8ebbb6b7e016fd932506af7246da501b5ea0a1f6ab4e6aa78b32ad106aa5ad

Download Submit
C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\csrss.exe
Filesize
328KB

MD5
5a6770a663b5125240a78424db7a74f2

SHA1
b3f3615b2e3c7b04fa904ce893644b9de65f9395

SHA256
7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93

SHA512
58bfc1a02760d14ac63e4a9c8a06430a1a2adca1608fba10d8be59e34db03e51cf8ebbb6b7e016fd932506af7246da501b5ea0a1f6ab4e6aa78b32ad106aa5ad

Download Submit
C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\csrss.exe
Filesize
328KB

MD5
5a6770a663b5125240a78424db7a74f2

SHA1
b3f3615b2e3c7b04fa904ce893644b9de65f9395

SHA256
7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93

SHA512
58bfc1a02760d14ac63e4a9c8a06430a1a2adca1608fba10d8be59e34db03e51cf8ebbb6b7e016fd932506af7246da501b5ea0a1f6ab4e6aa78b32ad106aa5ad

Download Submit
C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe
Filesize
328KB

MD5
5a6770a663b5125240a78424db7a74f2

SHA1
b3f3615b2e3c7b04fa904ce893644b9de65f9395

SHA256
7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93

SHA512
58bfc1a02760d14ac63e4a9c8a06430a1a2adca1608fba10d8be59e34db03e51cf8ebbb6b7e016fd932506af7246da501b5ea0a1f6ab4e6aa78b32ad106aa5ad

Download Submit
C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe
Filesize
328KB

MD5
5a6770a663b5125240a78424db7a74f2

SHA1
b3f3615b2e3c7b04fa904ce893644b9de65f9395

SHA256
7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93

SHA512
58bfc1a02760d14ac63e4a9c8a06430a1a2adca1608fba10d8be59e34db03e51cf8ebbb6b7e016fd932506af7246da501b5ea0a1f6ab4e6aa78b32ad106aa5ad

Download Submit
C:\Users\Admin\AppData\Roaming\sgbcsvbadfvbdfvasdf\Tsdfadsvsfsdfs\winlogon.exe
Filesize
328KB

MD5
5a6770a663b5125240a78424db7a74f2

SHA1
b3f3615b2e3c7b04fa904ce893644b9de65f9395

SHA256
7487b0bf31ecec6248a41d78cd00d1f4e4b5f6e778b363f0d798fe2e654f1f93

SHA512
58bfc1a02760d14ac63e4a9c8a06430a1a2adca1608fba10d8be59e34db03e51cf8ebbb6b7e016fd932506af7246da501b5ea0a1f6ab4e6aa78b32ad106aa5ad

Download Submit
C:\Users\Admin\AppData\Roaming\winlogon.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
C:\Users\Admin\AppData\Roaming\winlogon.exe
Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/1224-152-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1224-151-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1224-142-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1224-140-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1224-157-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1224-144-0x00000000004B5670-mapping.dmp

Download
memory/1224-141-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1224-148-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/1224-150-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/2264-132-0x00007FFEE7540000-0x00007FFEE7F76000-memory.dmp

Filesize
10.2MB

Download
memory/3268-139-0x0000000000000000-mapping.dmp

Download
memory/4480-133-0x0000000000000000-mapping.dmp

Download
memory/4912-153-0x0000000000000000-mapping.dmp

Download
memory/4912-156-0x00007FFEE7540000-0x00007FFEE7F76000-memory.dmp

Filesize
10.2MB

Download
memory/4964-138-0x00007FFEE7540000-0x00007FFEE7F76000-memory.dmp

Filesize
10.2MB

Download
memory/4964-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads