darkcomet | 9a4238d07b78cedaf9f16693faadaf26e524d37d82989871b7e8875a38c16318

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 20:14

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General

Target

new calc.exe
Size

1.1MB
MD5

0878b366dd695cc10da365b40f454062
SHA1

c21f65d76421ff06dab8ada263b5aca971a6d899
SHA256

098aef2de51c227361d72b5607b9ec7fe463d9a185ff5300577e96371c75a69c
SHA512

9b8213a3eea6f7fab26796768812a944539c0d2ea449b1354b51a6e71938d280c66babfd823d483c5faf797b86396680f9072bc12e954c5d32ee9fb16607c279
SSDEEP

24576:RQox/GpVEAIT5XRtEyAPqsw97uN+XmxjeU/+sbG:RQoc45XTEyACt7uNHX/zbG

Score

10^/10

darkcomet guest16 aspackv2 discovery evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

dc2012.ddns.net:77

Mutex

DC_MUTEX-F666ELN

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
M472kUGFekzF
install
true
offline_keylogger
true
persistence
true
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

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	STUB.EXE

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2872	attrib.exe
2328	attrib.exe

ASPack v2.12-2.42 1 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

resource	yara_rule
behavioral1/files/0x0011000000011c2c-2.dat	aspack_v212_v242

Executes dropped EXE 3 IoCs

pid	Process
2500	ESBCALCPORT.EXE
1008	STUB.EXE
2928	msdcsc.exe

Loads dropped DLL 5 IoCs

pid	Process
2272	new calc.exe
2272	new calc.exe
2272	new calc.exe
1008	STUB.EXE
1008	STUB.EXE

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	STUB.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	msdcsc.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	STUB.EXE
File opened for modification	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	STUB.EXE
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	STUB.EXE

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 9 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	STUB.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	new calc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ESBCALCPORT.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1008	STUB.EXE
Token: SeSecurityPrivilege	1008	STUB.EXE
Token: SeTakeOwnershipPrivilege	1008	STUB.EXE
Token: SeLoadDriverPrivilege	1008	STUB.EXE
Token: SeSystemProfilePrivilege	1008	STUB.EXE
Token: SeSystemtimePrivilege	1008	STUB.EXE
Token: SeProfSingleProcessPrivilege	1008	STUB.EXE
Token: SeIncBasePriorityPrivilege	1008	STUB.EXE
Token: SeCreatePagefilePrivilege	1008	STUB.EXE
Token: SeBackupPrivilege	1008	STUB.EXE
Token: SeRestorePrivilege	1008	STUB.EXE
Token: SeShutdownPrivilege	1008	STUB.EXE
Token: SeDebugPrivilege	1008	STUB.EXE
Token: SeSystemEnvironmentPrivilege	1008	STUB.EXE
Token: SeChangeNotifyPrivilege	1008	STUB.EXE
Token: SeRemoteShutdownPrivilege	1008	STUB.EXE
Token: SeUndockPrivilege	1008	STUB.EXE
Token: SeManageVolumePrivilege	1008	STUB.EXE
Token: SeImpersonatePrivilege	1008	STUB.EXE
Token: SeCreateGlobalPrivilege	1008	STUB.EXE
Token: 33	1008	STUB.EXE
Token: 34	1008	STUB.EXE
Token: 35	1008	STUB.EXE
Token: SeIncreaseQuotaPrivilege	2928	msdcsc.exe
Token: SeSecurityPrivilege	2928	msdcsc.exe
Token: SeTakeOwnershipPrivilege	2928	msdcsc.exe
Token: SeLoadDriverPrivilege	2928	msdcsc.exe
Token: SeSystemProfilePrivilege	2928	msdcsc.exe
Token: SeSystemtimePrivilege	2928	msdcsc.exe
Token: SeProfSingleProcessPrivilege	2928	msdcsc.exe
Token: SeIncBasePriorityPrivilege	2928	msdcsc.exe
Token: SeCreatePagefilePrivilege	2928	msdcsc.exe
Token: SeBackupPrivilege	2928	msdcsc.exe
Token: SeRestorePrivilege	2928	msdcsc.exe
Token: SeShutdownPrivilege	2928	msdcsc.exe
Token: SeDebugPrivilege	2928	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	2928	msdcsc.exe
Token: SeChangeNotifyPrivilege	2928	msdcsc.exe
Token: SeRemoteShutdownPrivilege	2928	msdcsc.exe
Token: SeUndockPrivilege	2928	msdcsc.exe
Token: SeManageVolumePrivilege	2928	msdcsc.exe
Token: SeImpersonatePrivilege	2928	msdcsc.exe
Token: SeCreateGlobalPrivilege	2928	msdcsc.exe
Token: 33	2928	msdcsc.exe
Token: 34	2928	msdcsc.exe
Token: 35	2928	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2928	msdcsc.exe

Suspicious use of WriteProcessMemory 55 IoCs

description	pid	Process	procid_target
PID 2272 wrote to memory of 2500	2272	new calc.exe	30
PID 2272 wrote to memory of 2500	2272	new calc.exe	30
PID 2272 wrote to memory of 2500	2272	new calc.exe	30
PID 2272 wrote to memory of 2500	2272	new calc.exe	30
PID 2272 wrote to memory of 1008	2272	new calc.exe	31
PID 2272 wrote to memory of 1008	2272	new calc.exe	31
PID 2272 wrote to memory of 1008	2272	new calc.exe	31
PID 2272 wrote to memory of 1008	2272	new calc.exe	31
PID 2500 wrote to memory of 928	2500	ESBCALCPORT.EXE	32
PID 2500 wrote to memory of 928	2500	ESBCALCPORT.EXE	32
PID 2500 wrote to memory of 928	2500	ESBCALCPORT.EXE	32
PID 2500 wrote to memory of 928	2500	ESBCALCPORT.EXE	32
PID 1008 wrote to memory of 3048	1008	STUB.EXE	33
PID 1008 wrote to memory of 3048	1008	STUB.EXE	33
PID 1008 wrote to memory of 3048	1008	STUB.EXE	33
PID 1008 wrote to memory of 3048	1008	STUB.EXE	33
PID 1008 wrote to memory of 2812	1008	STUB.EXE	35
PID 1008 wrote to memory of 2812	1008	STUB.EXE	35
PID 1008 wrote to memory of 2812	1008	STUB.EXE	35
PID 1008 wrote to memory of 2812	1008	STUB.EXE	35
PID 1008 wrote to memory of 2928	1008	STUB.EXE	37
PID 1008 wrote to memory of 2928	1008	STUB.EXE	37
PID 1008 wrote to memory of 2928	1008	STUB.EXE	37
PID 1008 wrote to memory of 2928	1008	STUB.EXE	37
PID 2812 wrote to memory of 2872	2812	cmd.exe	39
PID 2812 wrote to memory of 2872	2812	cmd.exe	39
PID 2812 wrote to memory of 2872	2812	cmd.exe	39
PID 2812 wrote to memory of 2872	2812	cmd.exe	39
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 2928 wrote to memory of 3056	2928	msdcsc.exe	38
PID 3048 wrote to memory of 2328	3048	cmd.exe	40
PID 3048 wrote to memory of 2328	3048	cmd.exe	40
PID 3048 wrote to memory of 2328	3048	cmd.exe	40
PID 3048 wrote to memory of 2328	3048	cmd.exe	40

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2328	attrib.exe
2872	attrib.exe

C:\Users\Admin\AppData\Local\Temp\new calc.exe
"C:\Users\Admin\AppData\Local\Temp\new calc.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Users\Admin\AppData\Roaming\ESBCALCPORT.EXE
  "C:\Users\Admin\AppData\Roaming\ESBCALCPORT.EXE"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2500
- - C:\Windows\splwow64.exe
    C:\Windows\splwow64.exe 12288
    3⤵
    PID:928
- C:\Users\Admin\AppData\Roaming\STUB.EXE
  "C:\Users\Admin\AppData\Roaming\STUB.EXE"
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1008
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Roaming\STUB.EXE" +s +h
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3048
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Roaming\STUB.EXE" +s +h
      4⤵
      Sets file to hidden
      System Location Discovery: System Language Discovery
      Views/modifies file attributes
      PID:2328
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Roaming" +s +h
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2812
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Roaming" +s +h
      4⤵
      Sets file to hidden
      System Location Discovery: System Language Discovery
      Views/modifies file attributes
      PID:2872
- - C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
    "C:\Windows\system32\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2928
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      System Location Discovery: System Language Discovery
      PID:3056

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Roaming\ESBCALCPORT.EXE

Filesize
836KB

MD5
4ecf1d1915f6c16a1d80fabb5ed8ad25

SHA1
e29b5b807f111b7eb3108eb113bed845352f94bd

SHA256
d66c32f7016280c5e413222cae5406b462d72d7228037e8adc8239420d5a5df0

SHA512
1b9d7ed66047961681f5de58a14a3e328a4f1c90835fd2d1ccbcd03cb1344852251960dd01fd46d9e31175702110e99c3d1abf646f025f9a931075fa69049d1e

Download Submit
\Users\Admin\AppData\Roaming\STUB.EXE

Filesize
235KB

MD5
92125c8bd0623f4ae5fb220d261bfc3b

SHA1
3e0b2ddc4a56c747e998afc4c631ffe1ca663703

SHA256
9f857811dffa0fd8d08f1053caed8aed94a7ac79b541ba44189cea0887e415de

SHA512
396d5cab185bffe5fb466471fffc0b89afe1a938136bc133105d25c211f58b6e48b6742603aeb8d13d0e32e4eaaeedc8b9b0729f016a3f89cd7f405c3a695303

Download Submit
memory/1008-38-0x0000000003610000-0x00000000036C5000-memory.dmp

Filesize
724KB

Download
memory/1008-23-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1008-81-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1008-37-0x0000000003610000-0x00000000036C5000-memory.dmp

Filesize
724KB

Download
memory/2272-6-0x0000000003070000-0x000000000334B000-memory.dmp

Filesize
2.9MB

Download
memory/2272-20-0x0000000002510000-0x00000000025C5000-memory.dmp

Filesize
724KB

Download
memory/2272-21-0x0000000002510000-0x00000000025C5000-memory.dmp

Filesize
724KB

Download
memory/2500-84-0x0000000000400000-0x00000000006DB000-memory.dmp

Filesize
2.9MB

Download
memory/2500-15-0x0000000000400000-0x00000000006DB000-memory.dmp

Filesize
2.9MB

Download
memory/2500-11-0x0000000000400000-0x00000000006DB000-memory.dmp

Filesize
2.9MB

Download
memory/2500-12-0x0000000000400000-0x00000000006DB000-memory.dmp

Filesize
2.9MB

Download
memory/2500-13-0x0000000000400000-0x00000000006DB000-memory.dmp

Filesize
2.9MB

Download
memory/2500-24-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2500-82-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2500-14-0x0000000000400000-0x00000000006DB000-memory.dmp

Filesize
2.9MB

Download
memory/2928-93-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-97-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-83-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-85-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-103-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-87-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-89-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-91-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-39-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-95-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-101-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-99-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/3056-41-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/3056-79-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads