darkcomet | eda7e632401033fe751df75ee04996d7a8c1fce011bbf1b76de13fd555e2cde1

General

Target

Bloxstrap-v2.8.1.exe
Size

11.5MB
MD5

7d5ee16d78c8229d64220511edd7ed0a
SHA1

c4c71c0e76dee074e78b5fa8575d9002f364ee52
SHA256

eda7e632401033fe751df75ee04996d7a8c1fce011bbf1b76de13fd555e2cde1
SHA512

d9ab115b805405cd8e91671fdf5a391a506e63b2e9209e0300748b7392bce98b7ef3446404a2e1c75c747d689057f7d05c30032fb246552a11c0c218830516d8
SSDEEP

98304:95qZ+pv3Tscod5DFasb/r5vGWD3EOYoHwfLk3vSmaR0+Mc4AN0edaAHDfysrTl/L:95qZ+pLscVsb/r5vGlObAbN0qo

Score

10^/10

darkcomet guest16 discovery persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

interface-alternate.gl.at.ply.gg:54125

Mutex

DC_MUTEX-VPRU4P1

Attributes

InstallPath
Bloxstrap\Errorhandler.exe
gencode
gEP7RRzUsNHB
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
Darkcomet family
darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

HANDLER.EXE

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\Bloxstrap\\Errorhandler.exe"	HANDLER.EXE

Executes dropped EXE 4 IoCs

Processes:

BLOXSTRAP-V2.8.1 (1).EXEHANDLER.EXEErrorhandler.exe

pid process

1736 BLOXSTRAP-V2.8.1 (1).EXE
1972 HANDLER.EXE
1200
2756 Errorhandler.exe
Loads dropped DLL 6 IoCs

Processes:

Bloxstrap-v2.8.1.exeHANDLER.EXE

pid process

3040 Bloxstrap-v2.8.1.exe
3040 Bloxstrap-v2.8.1.exe
3040 Bloxstrap-v2.8.1.exe
1200
1972 HANDLER.EXE
1972 HANDLER.EXE

pid	process
1736	BLOXSTRAP-V2.8.1 (1).EXE
1972	HANDLER.EXE
1200
2756	Errorhandler.exe

pid	process
3040	Bloxstrap-v2.8.1.exe
3040	Bloxstrap-v2.8.1.exe
3040	Bloxstrap-v2.8.1.exe
1200
1972	HANDLER.EXE
1972	HANDLER.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

HANDLER.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\Bloxstrap\\Errorhandler.exe"	HANDLER.EXE

Suspicious use of SetThreadContext 1 IoCs

Processes:

Errorhandler.exe

description pid process target process

PID 2756 set thread context of 2852 2756 Errorhandler.exe iexplore.exe

description	pid	process	target process
PID 2756 set thread context of 2852	2756	Errorhandler.exe	iexplore.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\HANDLER.EXE	upx
behavioral1/memory/1972-14-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/1972-31-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2756-32-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2756-36-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral1/memory/2852-34-0x0000000000400000-0x00000000004BA000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

iexplore.exenotepad.exeBloxstrap-v2.8.1.exeHANDLER.EXEErrorhandler.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bloxstrap-v2.8.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HANDLER.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Errorhandler.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

iexplore.exe

pid	process
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe
2852	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

HANDLER.EXEErrorhandler.exeiexplore.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1972	HANDLER.EXE
Token: SeSecurityPrivilege	1972	HANDLER.EXE
Token: SeTakeOwnershipPrivilege	1972	HANDLER.EXE
Token: SeLoadDriverPrivilege	1972	HANDLER.EXE
Token: SeSystemProfilePrivilege	1972	HANDLER.EXE
Token: SeSystemtimePrivilege	1972	HANDLER.EXE
Token: SeProfSingleProcessPrivilege	1972	HANDLER.EXE
Token: SeIncBasePriorityPrivilege	1972	HANDLER.EXE
Token: SeCreatePagefilePrivilege	1972	HANDLER.EXE
Token: SeBackupPrivilege	1972	HANDLER.EXE
Token: SeRestorePrivilege	1972	HANDLER.EXE
Token: SeShutdownPrivilege	1972	HANDLER.EXE
Token: SeDebugPrivilege	1972	HANDLER.EXE
Token: SeSystemEnvironmentPrivilege	1972	HANDLER.EXE
Token: SeChangeNotifyPrivilege	1972	HANDLER.EXE
Token: SeRemoteShutdownPrivilege	1972	HANDLER.EXE
Token: SeUndockPrivilege	1972	HANDLER.EXE
Token: SeManageVolumePrivilege	1972	HANDLER.EXE
Token: SeImpersonatePrivilege	1972	HANDLER.EXE
Token: SeCreateGlobalPrivilege	1972	HANDLER.EXE
Token: 33	1972	HANDLER.EXE
Token: 34	1972	HANDLER.EXE
Token: 35	1972	HANDLER.EXE
Token: SeIncreaseQuotaPrivilege	2756	Errorhandler.exe
Token: SeSecurityPrivilege	2756	Errorhandler.exe
Token: SeTakeOwnershipPrivilege	2756	Errorhandler.exe
Token: SeLoadDriverPrivilege	2756	Errorhandler.exe
Token: SeSystemProfilePrivilege	2756	Errorhandler.exe
Token: SeSystemtimePrivilege	2756	Errorhandler.exe
Token: SeProfSingleProcessPrivilege	2756	Errorhandler.exe
Token: SeIncBasePriorityPrivilege	2756	Errorhandler.exe
Token: SeCreatePagefilePrivilege	2756	Errorhandler.exe
Token: SeBackupPrivilege	2756	Errorhandler.exe
Token: SeRestorePrivilege	2756	Errorhandler.exe
Token: SeShutdownPrivilege	2756	Errorhandler.exe
Token: SeDebugPrivilege	2756	Errorhandler.exe
Token: SeSystemEnvironmentPrivilege	2756	Errorhandler.exe
Token: SeChangeNotifyPrivilege	2756	Errorhandler.exe
Token: SeRemoteShutdownPrivilege	2756	Errorhandler.exe
Token: SeUndockPrivilege	2756	Errorhandler.exe
Token: SeManageVolumePrivilege	2756	Errorhandler.exe
Token: SeImpersonatePrivilege	2756	Errorhandler.exe
Token: SeCreateGlobalPrivilege	2756	Errorhandler.exe
Token: 33	2756	Errorhandler.exe
Token: 34	2756	Errorhandler.exe
Token: 35	2756	Errorhandler.exe
Token: SeIncreaseQuotaPrivilege	2852	iexplore.exe
Token: SeSecurityPrivilege	2852	iexplore.exe
Token: SeTakeOwnershipPrivilege	2852	iexplore.exe
Token: SeLoadDriverPrivilege	2852	iexplore.exe
Token: SeSystemProfilePrivilege	2852	iexplore.exe
Token: SeSystemtimePrivilege	2852	iexplore.exe
Token: SeProfSingleProcessPrivilege	2852	iexplore.exe
Token: SeIncBasePriorityPrivilege	2852	iexplore.exe
Token: SeCreatePagefilePrivilege	2852	iexplore.exe
Token: SeBackupPrivilege	2852	iexplore.exe
Token: SeRestorePrivilege	2852	iexplore.exe
Token: SeShutdownPrivilege	2852	iexplore.exe
Token: SeDebugPrivilege	2852	iexplore.exe
Token: SeSystemEnvironmentPrivilege	2852	iexplore.exe
Token: SeChangeNotifyPrivilege	2852	iexplore.exe
Token: SeRemoteShutdownPrivilege	2852	iexplore.exe
Token: SeUndockPrivilege	2852	iexplore.exe
Token: SeManageVolumePrivilege	2852	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

iexplore.exe

pid process

2852 iexplore.exe

Suspicious use of WriteProcessMemory 41 IoCs

Processes:

Bloxstrap-v2.8.1.exeHANDLER.EXEErrorhandler.exeiexplore.exe

description	pid	process	target process
PID 3040 wrote to memory of 1736	3040	Bloxstrap-v2.8.1.exe	BLOXSTRAP-V2.8.1 (1).EXE
PID 3040 wrote to memory of 1736	3040	Bloxstrap-v2.8.1.exe	BLOXSTRAP-V2.8.1 (1).EXE
PID 3040 wrote to memory of 1736	3040	Bloxstrap-v2.8.1.exe	BLOXSTRAP-V2.8.1 (1).EXE
PID 3040 wrote to memory of 1736	3040	Bloxstrap-v2.8.1.exe	BLOXSTRAP-V2.8.1 (1).EXE
PID 3040 wrote to memory of 1972	3040	Bloxstrap-v2.8.1.exe	HANDLER.EXE
PID 3040 wrote to memory of 1972	3040	Bloxstrap-v2.8.1.exe	HANDLER.EXE
PID 3040 wrote to memory of 1972	3040	Bloxstrap-v2.8.1.exe	HANDLER.EXE
PID 3040 wrote to memory of 1972	3040	Bloxstrap-v2.8.1.exe	HANDLER.EXE
PID 1972 wrote to memory of 2756	1972	HANDLER.EXE	Errorhandler.exe
PID 1972 wrote to memory of 2756	1972	HANDLER.EXE	Errorhandler.exe
PID 1972 wrote to memory of 2756	1972	HANDLER.EXE	Errorhandler.exe
PID 1972 wrote to memory of 2756	1972	HANDLER.EXE	Errorhandler.exe
PID 2756 wrote to memory of 2852	2756	Errorhandler.exe	iexplore.exe
PID 2756 wrote to memory of 2852	2756	Errorhandler.exe	iexplore.exe
PID 2756 wrote to memory of 2852	2756	Errorhandler.exe	iexplore.exe
PID 2756 wrote to memory of 2852	2756	Errorhandler.exe	iexplore.exe
PID 2756 wrote to memory of 2852	2756	Errorhandler.exe	iexplore.exe
PID 2756 wrote to memory of 2852	2756	Errorhandler.exe	iexplore.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe
PID 2852 wrote to memory of 2848	2852	iexplore.exe	notepad.exe

C:\Users\Admin\AppData\Local\Temp\Bloxstrap-v2.8.1.exe
"C:\Users\Admin\AppData\Local\Temp\Bloxstrap-v2.8.1.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Users\Admin\AppData\Local\Temp\BLOXSTRAP-V2.8.1 (1).EXE
  "C:\Users\Admin\AppData\Local\Temp\BLOXSTRAP-V2.8.1 (1).EXE"
  2⤵
  - Executes dropped EXE
  PID:1736
- C:\Users\Admin\AppData\Local\Temp\HANDLER.EXE
  "C:\Users\Admin\AppData\Local\Temp\HANDLER.EXE"
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1972
- - C:\Users\Admin\Documents\Bloxstrap\Errorhandler.exe
    "C:\Users\Admin\Documents\Bloxstrap\Errorhandler.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2756
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:2852
    - - C:\Windows\SysWOW64\notepad.exe
        
        notepad
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\HANDLER.EXE

Filesize
253KB

MD5
9877f2250a1b6f72beedd0cf71b90a6c

SHA1
c8e179559e1d7839ff1078b0685b798ecfc0f8f2

SHA256
19f4bb3e5785aa78e2e97d59b93fa396636d1d6c9eff94ea8dee21c0b55e2c45

SHA512
a1c65f2c0568444f9e5f2f119810c7d4ca3dbd7b1673edd5235e7be4a316e929c608f2e441860da909d1c120c20b5cab44d6bacaa4db076c0b30f5c832936979

Download Submit
\Users\Admin\AppData\Local\Temp\BLOXSTRAP-V2.8.1 (1).EXE

Filesize
11.1MB

MD5
60246a70b28a9d7ef6a2dfe009e48075

SHA1
8dd51b8460307f785690008657918540a8ee4998

SHA256
e9091fa15944a451e792674cf408e400a5e6391cd31160040210b494bd723f17

SHA512
551ffebc64b11e21a234b3ac5a1e103e5cf0ff4fd4d5b71628d0c4215b24fbca946cc7dc14571667214dca86ae9c3327c928b996be456529f84bb2f4a0901e5f

Download Submit
memory/1972-14-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1972-15-0x0000000000260000-0x0000000000261000-memory.dmp

Filesize
4KB

Download
memory/1972-31-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2756-32-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2756-36-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2848-75-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2848-37-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/2852-34-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads