darkcomet | c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500

General

Target

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Size

347KB
MD5

eefcea17c245d722fcfe515970a99b24
SHA1

100f1fa0224e1ae4b79fb661e29a7b22cf0e47fa
SHA256

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500
SHA512

23c08bc35f8e3c6e28173f0e6eadabe11638e40c3ec68ef0a6448a70739d340d29a3c3b75f887ed7aa807cfe40cc78b34c1f040fffa51cea87ba14553d4e08bb
SSDEEP

6144:CUPCHaSrGCFGMQZhKYWqdRBYn58JOBGmtMCANkRfX90OO1+JC5mfT4Neu:G62GiGMBHqhYOJONtMCesfXlKXk7A

Score

10^/10

darkcomet 13.07.12 crypter persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

13.07.12 Crypter

C2

leetaka1337.no-ip.org:1604

Mutex

DC_MUTEX-JFX5RP1

Attributes

InstallPath
MSDCSC\winhost.exe
gencode
lCnq6VNbar2M
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:

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\MSDCSC\\winhost.exe"	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

Executes dropped EXE 2 IoCs

Processes:

STUB.EXEwinhost.exe

pid process

3948 STUB.EXE
4840 winhost.exe

pid	process
3948	STUB.EXE
4840	winhost.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/5068-134-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/5068-135-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/5068-136-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/5068-138-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/5068-139-0x0000000000400000-0x00000000004C2000-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:

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\winhost.exe"	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

Drops file in System32 directory 3 IoCs

Processes:

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

description	ioc	process
File created	C:\Windows\SysWOW64\MSDCSC\winhost.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\winhost.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

description	pid	process	target process
PID 4112 set thread context of 5068	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.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:

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe

Suspicious use of AdjustPrivilegeToken 26 IoCs

Processes:

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exec4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exewinhost.exe

description	pid	process
Token: SeDebugPrivilege	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeIncreaseQuotaPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeSecurityPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeTakeOwnershipPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeLoadDriverPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeSystemProfilePrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeSystemtimePrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeProfSingleProcessPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeIncBasePriorityPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeCreatePagefilePrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeBackupPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeRestorePrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeShutdownPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeDebugPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeSystemEnvironmentPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeChangeNotifyPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeRemoteShutdownPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeUndockPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeManageVolumePrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeImpersonatePrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeCreateGlobalPrivilege	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: 33	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: 34	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: 35	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: 36	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
Token: SeDebugPrivilege	4840	winhost.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exec4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exewinhost.exe

description	pid	process	target process
PID 4112 wrote to memory of 5068	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
PID 4112 wrote to memory of 5068	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
PID 4112 wrote to memory of 5068	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
PID 4112 wrote to memory of 5068	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
PID 4112 wrote to memory of 5068	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
PID 4112 wrote to memory of 5068	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
PID 4112 wrote to memory of 5068	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
PID 4112 wrote to memory of 5068	4112	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
PID 5068 wrote to memory of 3948	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	STUB.EXE
PID 5068 wrote to memory of 3948	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	STUB.EXE
PID 5068 wrote to memory of 3948	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	STUB.EXE
PID 5068 wrote to memory of 4840	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	winhost.exe
PID 5068 wrote to memory of 4840	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	winhost.exe
PID 5068 wrote to memory of 4840	5068	c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe	winhost.exe
PID 4840 wrote to memory of 4800	4840	winhost.exe	winhost.exe
PID 4840 wrote to memory of 4800	4840	winhost.exe	winhost.exe
PID 4840 wrote to memory of 4800	4840	winhost.exe	winhost.exe

C:\Users\Admin\AppData\Local\Temp\c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
"C:\Users\Admin\AppData\Local\Temp\c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4112

C:\Users\Admin\AppData\Local\Temp\c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
C:\Users\Admin\AppData\Local\Temp\c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500.exe
2⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5068

C:\Users\Admin\AppData\Local\Temp\STUB.EXE
"C:\Users\Admin\AppData\Local\Temp\STUB.EXE"
3⤵
- Executes dropped EXE
PID:3948

C:\Windows\SysWOW64\MSDCSC\winhost.exe
"C:\Windows\system32\MSDCSC\winhost.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4840

C:\Windows\SysWOW64\MSDCSC\winhost.exe
C:\Windows\SysWOW64\MSDCSC\winhost.exe
4⤵
PID:4800

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

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\AppData\Local\Temp\STUB.EXE
Filesize
47KB

MD5
6e9ee67b3cceaf1fc3bd53a9c33a3cc7

SHA1
1ce7d9f73b9da92385ec41e416d2cf7a6f2ccc03

SHA256
e9509d87ec53efda131c636fe729180eea8c48850693f0c800fc04f88f5960bb

SHA512
6ee77b3d3238e1507ab83f57fa06b88b384b5d8a804a27d93aab30622166b1bedd4796ec30c8dfca3b9085d41c69fd064014e0a424a79e9e8f15b79c6568fb1c

Download Submit
C:\Users\Admin\AppData\Local\Temp\STUB.EXE
Filesize
47KB

MD5
6e9ee67b3cceaf1fc3bd53a9c33a3cc7

SHA1
1ce7d9f73b9da92385ec41e416d2cf7a6f2ccc03

SHA256
e9509d87ec53efda131c636fe729180eea8c48850693f0c800fc04f88f5960bb

SHA512
6ee77b3d3238e1507ab83f57fa06b88b384b5d8a804a27d93aab30622166b1bedd4796ec30c8dfca3b9085d41c69fd064014e0a424a79e9e8f15b79c6568fb1c

Download Submit
C:\Windows\SysWOW64\MSDCSC\winhost.exe
Filesize
347KB

MD5
eefcea17c245d722fcfe515970a99b24

SHA1
100f1fa0224e1ae4b79fb661e29a7b22cf0e47fa

SHA256
c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500

SHA512
23c08bc35f8e3c6e28173f0e6eadabe11638e40c3ec68ef0a6448a70739d340d29a3c3b75f887ed7aa807cfe40cc78b34c1f040fffa51cea87ba14553d4e08bb

Download Submit
C:\Windows\SysWOW64\MSDCSC\winhost.exe
Filesize
347KB

MD5
eefcea17c245d722fcfe515970a99b24

SHA1
100f1fa0224e1ae4b79fb661e29a7b22cf0e47fa

SHA256
c4a3eb0612d558ec941be28a8a4b7734a822c5659db9f840a57567a971ffc500

SHA512
23c08bc35f8e3c6e28173f0e6eadabe11638e40c3ec68ef0a6448a70739d340d29a3c3b75f887ed7aa807cfe40cc78b34c1f040fffa51cea87ba14553d4e08bb

Download Submit
memory/3948-140-0x0000000000000000-mapping.dmp

Download
memory/3948-143-0x0000000074630000-0x0000000074BE1000-memory.dmp

Filesize
5.7MB

Download
memory/4112-132-0x0000000075510000-0x0000000075AC1000-memory.dmp

Filesize
5.7MB

Download
memory/4112-137-0x0000000075510000-0x0000000075AC1000-memory.dmp

Filesize
5.7MB

Download
memory/4800-147-0x0000000000000000-mapping.dmp

Download
memory/4840-144-0x0000000000000000-mapping.dmp

Download
memory/4840-148-0x0000000073C80000-0x0000000074231000-memory.dmp

Filesize
5.7MB

Download
memory/5068-136-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/5068-138-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/5068-139-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/5068-135-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/5068-134-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/5068-133-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads