darkcomet | d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5

General

Target

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Size

343KB
MD5

c6551e869e75447e6456095e6c6aeced
SHA1

44b79feb248f0c1d68e9f4f61f43050280e8672a
SHA256

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5
SHA512

965aa351ec316b187c92ed0ce065db56b813e52f31abd391f593b4215b443300f8355889b8eb66e896f9fcdc0fd87511d55c734e785459d047ebf4e0a0db00fe
SSDEEP

6144:fUPCHRSrGCFGMQZhKYWqdRBYn58JOBGmtMCANkRfX90OO1+JCl+aL5n:Xx2GiGMBHqhYOJONtMCesfXlKXll

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:

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.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"	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe

Executes dropped EXE 3 IoCs

Processes:

STUB.EXEwinhost.exewinhost.exe

pid process

3220 STUB.EXE
1296 winhost.exe
1916 winhost.exe

pid	process
3220	STUB.EXE
1296	winhost.exe
1916	winhost.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4408-133-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/4408-134-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/4408-135-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/4408-137-0x0000000000400000-0x00000000004C2000-memory.dmp	upx
behavioral2/memory/4408-138-0x0000000000400000-0x00000000004C2000-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:

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\winhost.exe"	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe

Drops file in System32 directory 3 IoCs

Processes:

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe

description	ioc	process
File created	C:\Windows\SysWOW64\MSDCSC\winhost.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\winhost.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exewinhost.exe

description	pid	process	target process
PID 5068 set thread context of 4408	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
PID 1296 set thread context of 1916	1296	winhost.exe	winhost.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:

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

winhost.exe

pid process

1916 winhost.exe

pid	process
1916	winhost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

Processes:

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exed461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exewinhost.exewinhost.exe

description	pid	process
Token: SeDebugPrivilege	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeIncreaseQuotaPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeSecurityPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeTakeOwnershipPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeLoadDriverPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeSystemProfilePrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeSystemtimePrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeProfSingleProcessPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeIncBasePriorityPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeCreatePagefilePrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeBackupPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeRestorePrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeShutdownPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeDebugPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeSystemEnvironmentPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeChangeNotifyPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeRemoteShutdownPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeUndockPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeManageVolumePrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeImpersonatePrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeCreateGlobalPrivilege	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: 33	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: 34	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: 35	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: 36	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
Token: SeDebugPrivilege	1296	winhost.exe
Token: SeIncreaseQuotaPrivilege	1916	winhost.exe
Token: SeSecurityPrivilege	1916	winhost.exe
Token: SeTakeOwnershipPrivilege	1916	winhost.exe
Token: SeLoadDriverPrivilege	1916	winhost.exe
Token: SeSystemProfilePrivilege	1916	winhost.exe
Token: SeSystemtimePrivilege	1916	winhost.exe
Token: SeProfSingleProcessPrivilege	1916	winhost.exe
Token: SeIncBasePriorityPrivilege	1916	winhost.exe
Token: SeCreatePagefilePrivilege	1916	winhost.exe
Token: SeBackupPrivilege	1916	winhost.exe
Token: SeRestorePrivilege	1916	winhost.exe
Token: SeShutdownPrivilege	1916	winhost.exe
Token: SeDebugPrivilege	1916	winhost.exe
Token: SeSystemEnvironmentPrivilege	1916	winhost.exe
Token: SeChangeNotifyPrivilege	1916	winhost.exe
Token: SeRemoteShutdownPrivilege	1916	winhost.exe
Token: SeUndockPrivilege	1916	winhost.exe
Token: SeManageVolumePrivilege	1916	winhost.exe
Token: SeImpersonatePrivilege	1916	winhost.exe
Token: SeCreateGlobalPrivilege	1916	winhost.exe
Token: 33	1916	winhost.exe
Token: 34	1916	winhost.exe
Token: 35	1916	winhost.exe
Token: 36	1916	winhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

winhost.exe

pid process

1916 winhost.exe

pid	process
1916	winhost.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exed461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exewinhost.exe

description	pid	process	target process
PID 5068 wrote to memory of 4408	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
PID 5068 wrote to memory of 4408	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
PID 5068 wrote to memory of 4408	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
PID 5068 wrote to memory of 4408	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
PID 5068 wrote to memory of 4408	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
PID 5068 wrote to memory of 4408	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
PID 5068 wrote to memory of 4408	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
PID 5068 wrote to memory of 4408	5068	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
PID 4408 wrote to memory of 3220	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	STUB.EXE
PID 4408 wrote to memory of 3220	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	STUB.EXE
PID 4408 wrote to memory of 3220	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	STUB.EXE
PID 4408 wrote to memory of 1296	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	winhost.exe
PID 4408 wrote to memory of 1296	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	winhost.exe
PID 4408 wrote to memory of 1296	4408	d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe	winhost.exe
PID 1296 wrote to memory of 1916	1296	winhost.exe	winhost.exe
PID 1296 wrote to memory of 1916	1296	winhost.exe	winhost.exe
PID 1296 wrote to memory of 1916	1296	winhost.exe	winhost.exe
PID 1296 wrote to memory of 1916	1296	winhost.exe	winhost.exe
PID 1296 wrote to memory of 1916	1296	winhost.exe	winhost.exe
PID 1296 wrote to memory of 1916	1296	winhost.exe	winhost.exe
PID 1296 wrote to memory of 1916	1296	winhost.exe	winhost.exe
PID 1296 wrote to memory of 1916	1296	winhost.exe	winhost.exe

C:\Users\Admin\AppData\Local\Temp\d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
"C:\Users\Admin\AppData\Local\Temp\d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5068

C:\Users\Admin\AppData\Local\Temp\d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.exe
C:\Users\Admin\AppData\Local\Temp\d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5.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:4408

C:\Users\Admin\AppData\Local\Temp\STUB.EXE
"C:\Users\Admin\AppData\Local\Temp\STUB.EXE"
3⤵
- Executes dropped EXE
PID:3220

C:\Windows\SysWOW64\MSDCSC\winhost.exe
"C:\Windows\system32\MSDCSC\winhost.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1296

C:\Windows\SysWOW64\MSDCSC\winhost.exe
C:\Windows\SysWOW64\MSDCSC\winhost.exe
4⤵
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1916

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

Replay Monitor

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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
343KB

MD5
c6551e869e75447e6456095e6c6aeced

SHA1
44b79feb248f0c1d68e9f4f61f43050280e8672a

SHA256
d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5

SHA512
965aa351ec316b187c92ed0ce065db56b813e52f31abd391f593b4215b443300f8355889b8eb66e896f9fcdc0fd87511d55c734e785459d047ebf4e0a0db00fe

Download Submit
C:\Windows\SysWOW64\MSDCSC\winhost.exe
Filesize
343KB

MD5
c6551e869e75447e6456095e6c6aeced

SHA1
44b79feb248f0c1d68e9f4f61f43050280e8672a

SHA256
d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5

SHA512
965aa351ec316b187c92ed0ce065db56b813e52f31abd391f593b4215b443300f8355889b8eb66e896f9fcdc0fd87511d55c734e785459d047ebf4e0a0db00fe

Download Submit
C:\Windows\SysWOW64\MSDCSC\winhost.exe
Filesize
343KB

MD5
c6551e869e75447e6456095e6c6aeced

SHA1
44b79feb248f0c1d68e9f4f61f43050280e8672a

SHA256
d461402663b6423f2f86b51a5e69b1d505d1d04c297d84d881b94afad55465d5

SHA512
965aa351ec316b187c92ed0ce065db56b813e52f31abd391f593b4215b443300f8355889b8eb66e896f9fcdc0fd87511d55c734e785459d047ebf4e0a0db00fe

Download Submit
memory/1296-151-0x0000000072980000-0x0000000072F31000-memory.dmp

Filesize
5.7MB

Download
memory/1296-146-0x0000000072980000-0x0000000072F31000-memory.dmp

Filesize
5.7MB

Download
memory/1296-143-0x0000000000000000-mapping.dmp

Download
memory/1916-147-0x0000000000000000-mapping.dmp

Download
memory/3220-142-0x0000000074010000-0x00000000745C1000-memory.dmp

Filesize
5.7MB

Download
memory/3220-139-0x0000000000000000-mapping.dmp

Download
memory/3220-156-0x0000000074010000-0x00000000745C1000-memory.dmp

Filesize
5.7MB

Download
memory/4408-132-0x0000000000000000-mapping.dmp

Download
memory/4408-138-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/4408-137-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/4408-135-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/4408-134-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/4408-133-0x0000000000400000-0x00000000004C2000-memory.dmp

Filesize
776KB

Download
memory/5068-136-0x00000000751D0000-0x0000000075781000-memory.dmp

Filesize
5.7MB

Download
memory/5068-155-0x00000000751D0000-0x0000000075781000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads