darkcomet | be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01

Analysis

max time kernel
192s
max time network
229s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
14/10/2022, 10:02

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Size 252KB
Sample221014-l2yyhaadd8
SHA256 be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01
MD5 74864d27b17bfb5cc0361f3dad0682f0
SHA1 60692c47dc2b281375f4c5cef204a0a398199a8f
SHA512 711707974581a2476539e17d38aa297fbb6fb8e02d75c0479f8ff2f0fad0a50c846c488137133407e91070c02bbbfd09e82f6f5e51069af1a2435f3ead089704
SSDEEP 6144:ncNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37:ncW7KEZlPzCy37
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet asd-1 evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

ASD-1

192.168.1.4:1604

Mutex

DC_MUTEX-31Y1MQ5

Attributes

InstallPath
module\reg.exe
gencode
QVMexaPBr0Rj
install
true
offline_keylogger
true
persistence
true
reg_key
regedit

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

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\module\\reg.exe"	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe

Executes dropped EXE 1 IoCs

pid	Process
1452	reg.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1158

pid	Process
4100	attrib.exe
2232	attrib.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1736-132-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/files/0x0008000000022dfb-136.dat	upx
behavioral2/files/0x0008000000022dfb-137.dat	upx
behavioral2/memory/1452-140-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/1736-142-0x0000000000400000-0x00000000004B7000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\regedit = "C:\\Windows\\system32\\module\\reg.exe"	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\regedit = "C:\\Windows\\system32\\module\\reg.exe"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\regedit = "C:\\Windows\\system32\\module\\reg.exe"	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\module\reg.exe	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
File opened for modification	C:\Windows\SysWOW64\module\reg.exe	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
File opened for modification	C:\Windows\SysWOW64\module\	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1452 set thread context of 4660	1452	reg.exe	89

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

System Information Discovery
T1082

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4660	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeSecurityPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeTakeOwnershipPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeLoadDriverPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeSystemProfilePrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeSystemtimePrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeProfSingleProcessPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeIncBasePriorityPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeCreatePagefilePrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeBackupPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeRestorePrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeShutdownPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeDebugPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeSystemEnvironmentPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeChangeNotifyPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeRemoteShutdownPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeUndockPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeManageVolumePrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeImpersonatePrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeCreateGlobalPrivilege	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: 33	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: 34	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: 35	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: 36	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
Token: SeIncreaseQuotaPrivilege	1452	reg.exe
Token: SeSecurityPrivilege	1452	reg.exe
Token: SeTakeOwnershipPrivilege	1452	reg.exe
Token: SeLoadDriverPrivilege	1452	reg.exe
Token: SeSystemProfilePrivilege	1452	reg.exe
Token: SeSystemtimePrivilege	1452	reg.exe
Token: SeProfSingleProcessPrivilege	1452	reg.exe
Token: SeIncBasePriorityPrivilege	1452	reg.exe
Token: SeCreatePagefilePrivilege	1452	reg.exe
Token: SeBackupPrivilege	1452	reg.exe
Token: SeRestorePrivilege	1452	reg.exe
Token: SeShutdownPrivilege	1452	reg.exe
Token: SeDebugPrivilege	1452	reg.exe
Token: SeSystemEnvironmentPrivilege	1452	reg.exe
Token: SeChangeNotifyPrivilege	1452	reg.exe
Token: SeRemoteShutdownPrivilege	1452	reg.exe
Token: SeUndockPrivilege	1452	reg.exe
Token: SeManageVolumePrivilege	1452	reg.exe
Token: SeImpersonatePrivilege	1452	reg.exe
Token: SeCreateGlobalPrivilege	1452	reg.exe
Token: 33	1452	reg.exe
Token: 34	1452	reg.exe
Token: 35	1452	reg.exe
Token: 36	1452	reg.exe
Token: SeIncreaseQuotaPrivilege	4660	iexplore.exe
Token: SeSecurityPrivilege	4660	iexplore.exe
Token: SeTakeOwnershipPrivilege	4660	iexplore.exe
Token: SeLoadDriverPrivilege	4660	iexplore.exe
Token: SeSystemProfilePrivilege	4660	iexplore.exe
Token: SeSystemtimePrivilege	4660	iexplore.exe
Token: SeProfSingleProcessPrivilege	4660	iexplore.exe
Token: SeIncBasePriorityPrivilege	4660	iexplore.exe
Token: SeCreatePagefilePrivilege	4660	iexplore.exe
Token: SeBackupPrivilege	4660	iexplore.exe
Token: SeRestorePrivilege	4660	iexplore.exe
Token: SeShutdownPrivilege	4660	iexplore.exe
Token: SeDebugPrivilege	4660	iexplore.exe
Token: SeSystemEnvironmentPrivilege	4660	iexplore.exe
Token: SeChangeNotifyPrivilege	4660	iexplore.exe
Token: SeRemoteShutdownPrivilege	4660	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4660	iexplore.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 4632	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe	82
PID 1736 wrote to memory of 4632	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe	82
PID 1736 wrote to memory of 4632	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe	82
PID 1736 wrote to memory of 1296	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe	83
PID 1736 wrote to memory of 1296	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe	83
PID 1736 wrote to memory of 1296	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe	83
PID 1736 wrote to memory of 1452	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe	85
PID 1736 wrote to memory of 1452	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe	85
PID 1736 wrote to memory of 1452	1736	be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe	85
PID 4632 wrote to memory of 4100	4632	cmd.exe	87
PID 4632 wrote to memory of 4100	4632	cmd.exe	87
PID 4632 wrote to memory of 4100	4632	cmd.exe	87
PID 1452 wrote to memory of 4660	1452	reg.exe	89
PID 1452 wrote to memory of 4660	1452	reg.exe	89
PID 1452 wrote to memory of 4660	1452	reg.exe	89
PID 1296 wrote to memory of 2232	1296	cmd.exe	88
PID 1296 wrote to memory of 2232	1296	cmd.exe	88
PID 1296 wrote to memory of 2232	1296	cmd.exe	88
PID 1452 wrote to memory of 4660	1452	reg.exe	89
PID 1452 wrote to memory of 4660	1452	reg.exe	89
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90
PID 4660 wrote to memory of 2720	4660	iexplore.exe	90

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
4100	attrib.exe
2232	attrib.exe

C:\Users\Admin\AppData\Local\Temp\be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe
"C:\Users\Admin\AppData\Local\Temp\be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1736
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4632
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01.exe" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:4100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1296
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:2232
- C:\Windows\SysWOW64\module\reg.exe
  "C:\Windows\system32\module\reg.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1452
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Adds Run key to start application
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4660
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      PID:2720

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

reg.exe

Path C:\Windows\SysWOW64\module\reg.exe
Size 252KB
SHA256 be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01
MD5 74864d27b17bfb5cc0361f3dad0682f0
SHA1 60692c47dc2b281375f4c5cef204a0a398199a8f
SHA512 711707974581a2476539e17d38aa297fbb6fb8e02d75c0479f8ff2f0fad0a50c846c488137133407e91070c02bbbfd09e82f6f5e51069af1a2435f3ead089704
SSDEEP 6144:ncNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37:ncW7KEZlPzCy37
MD5 SHA1 SHA512 SSDEEP

Submit Download

reg.exe

Path C:\Windows\SysWOW64\module\reg.exe
Size 252KB
SHA256 be8b32c5fda66fec2fb82d8fff15011c90c5eaaaf869ae126bfcc61b8e35cb01
MD5 74864d27b17bfb5cc0361f3dad0682f0
SHA1 60692c47dc2b281375f4c5cef204a0a398199a8f
SHA512 711707974581a2476539e17d38aa297fbb6fb8e02d75c0479f8ff2f0fad0a50c846c488137133407e91070c02bbbfd09e82f6f5e51069af1a2435f3ead089704
SSDEEP 6144:ncNYS996KFifeVjBpeExgVTFSXFoMc5RhCaL37:ncW7KEZlPzCy37
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1452-140-0x0000000000400000-0x00000000004B7000-memory.dmp

Download

memory/1736-132-0x0000000000400000-0x00000000004B7000-memory.dmp

Download

memory/1736-142-0x0000000000400000-0x00000000004B7000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads