darkcomet | 78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471

General

Target

78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe
Size

911KB
MD5

4bb9134eade669f1ad497b4d022da29f
SHA1

46074e9c42e81452ba97459a73896628db5341ea
SHA256

78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471
SHA512

778851a0407fca8499d7048cfe03e7c475e6d7909e94f7ecf63e6328793b67e07da38b23d8d5a5fafdbba0e057333bbeff1dba5c1bc069c5c74cf0da34b2fa60
SSDEEP

24576:W2O/Gl+LjtXzH4UXAPMdLkRrYFJkiD16KF8KJrUt5+Cx:yjtXzH4UXPBkrYoigKF8KlSDx

Score

10^/10

darkcomet guest16 persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

127.0.0.1:1604

Mutex

DC_MUTEX-54FS22Q

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
G2nZxP5wXrRx
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:

server.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\\MSDCSC\\msdcsc.exe"	server.exe

Drops file in Drivers directory 1 IoCs

Processes:

server.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts server.exe
Executes dropped EXE 3 IoCs

Processes:

server.exeResHacker.exemsdcsc.exe

pid process

2252 server.exe
2180 ResHacker.exe
328 msdcsc.exe

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	server.exe

pid	process
2252	server.exe
2180	ResHacker.exe
328	msdcsc.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exeserver.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	server.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

server.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	server.exe

Drops file in Windows directory 5 IoCs

Processes:

78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe

description	ioc	process
File opened for modification	C:\Windows\server.exe	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe
File created	C:\Windows\__tmp_rar_sfx_access_check_240562875	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe
File created	C:\Windows\ResHacker.exe	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe
File opened for modification	C:\Windows\ResHacker.exe	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe
File created	C:\Windows\server.exe	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

server.exemsdcsc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2252	server.exe
Token: SeSecurityPrivilege	2252	server.exe
Token: SeTakeOwnershipPrivilege	2252	server.exe
Token: SeLoadDriverPrivilege	2252	server.exe
Token: SeSystemProfilePrivilege	2252	server.exe
Token: SeSystemtimePrivilege	2252	server.exe
Token: SeProfSingleProcessPrivilege	2252	server.exe
Token: SeIncBasePriorityPrivilege	2252	server.exe
Token: SeCreatePagefilePrivilege	2252	server.exe
Token: SeBackupPrivilege	2252	server.exe
Token: SeRestorePrivilege	2252	server.exe
Token: SeShutdownPrivilege	2252	server.exe
Token: SeDebugPrivilege	2252	server.exe
Token: SeSystemEnvironmentPrivilege	2252	server.exe
Token: SeChangeNotifyPrivilege	2252	server.exe
Token: SeRemoteShutdownPrivilege	2252	server.exe
Token: SeUndockPrivilege	2252	server.exe
Token: SeManageVolumePrivilege	2252	server.exe
Token: SeImpersonatePrivilege	2252	server.exe
Token: SeCreateGlobalPrivilege	2252	server.exe
Token: 33	2252	server.exe
Token: 34	2252	server.exe
Token: 35	2252	server.exe
Token: 36	2252	server.exe
Token: SeIncreaseQuotaPrivilege	328	msdcsc.exe
Token: SeSecurityPrivilege	328	msdcsc.exe
Token: SeTakeOwnershipPrivilege	328	msdcsc.exe
Token: SeLoadDriverPrivilege	328	msdcsc.exe
Token: SeSystemProfilePrivilege	328	msdcsc.exe
Token: SeSystemtimePrivilege	328	msdcsc.exe
Token: SeProfSingleProcessPrivilege	328	msdcsc.exe
Token: SeIncBasePriorityPrivilege	328	msdcsc.exe
Token: SeCreatePagefilePrivilege	328	msdcsc.exe
Token: SeBackupPrivilege	328	msdcsc.exe
Token: SeRestorePrivilege	328	msdcsc.exe
Token: SeShutdownPrivilege	328	msdcsc.exe
Token: SeDebugPrivilege	328	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	328	msdcsc.exe
Token: SeChangeNotifyPrivilege	328	msdcsc.exe
Token: SeRemoteShutdownPrivilege	328	msdcsc.exe
Token: SeUndockPrivilege	328	msdcsc.exe
Token: SeManageVolumePrivilege	328	msdcsc.exe
Token: SeImpersonatePrivilege	328	msdcsc.exe
Token: SeCreateGlobalPrivilege	328	msdcsc.exe
Token: 33	328	msdcsc.exe
Token: 34	328	msdcsc.exe
Token: 35	328	msdcsc.exe
Token: 36	328	msdcsc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

msdcsc.exe

pid process

328 msdcsc.exe

pid	process
328	msdcsc.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exeserver.exe

description	pid	process	target process
PID 4948 wrote to memory of 2252	4948	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe	server.exe
PID 4948 wrote to memory of 2252	4948	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe	server.exe
PID 4948 wrote to memory of 2252	4948	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe	server.exe
PID 4948 wrote to memory of 2180	4948	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe	ResHacker.exe
PID 4948 wrote to memory of 2180	4948	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe	ResHacker.exe
PID 4948 wrote to memory of 2180	4948	78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe	ResHacker.exe
PID 2252 wrote to memory of 328	2252	server.exe	msdcsc.exe
PID 2252 wrote to memory of 328	2252	server.exe	msdcsc.exe
PID 2252 wrote to memory of 328	2252	server.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe
"C:\Users\Admin\AppData\Local\Temp\78f1d4ae12c30ca54b70aa9400f8d1d1d5d2e1e14b8ffd7959b61e50eecfc471.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Windows\server.exe
  "C:\Windows\server.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2252
- - C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
    "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:328
- C:\Windows\ResHacker.exe
  "C:\Windows\ResHacker.exe"
  2⤵
  - Executes dropped EXE
  PID:2180

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

Filesize
694KB

MD5
60526be0422ff21338477a2db15e0585

SHA1
87d802a77e22ed3d7ac84ece3247fa60e55f6be5

SHA256
5e727364e0dc432f6ea5b157a9e9569cc03b3b26b2db34b070b7c7dd81df484e

SHA512
e9f72d24a640900d95243152a912881cc260e220e8c0a289a2feae956118f6d869beb697adc80aa77d1be2dcc2c2809375e420bcc33b2098df83112aa8dbfa70

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

Filesize
694KB

MD5
60526be0422ff21338477a2db15e0585

SHA1
87d802a77e22ed3d7ac84ece3247fa60e55f6be5

SHA256
5e727364e0dc432f6ea5b157a9e9569cc03b3b26b2db34b070b7c7dd81df484e

SHA512
e9f72d24a640900d95243152a912881cc260e220e8c0a289a2feae956118f6d869beb697adc80aa77d1be2dcc2c2809375e420bcc33b2098df83112aa8dbfa70

Download Submit
C:\Windows\ResHacker.exe

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
C:\Windows\ResHacker.exe

Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
C:\Windows\server.exe

Filesize
694KB

MD5
60526be0422ff21338477a2db15e0585

SHA1
87d802a77e22ed3d7ac84ece3247fa60e55f6be5

SHA256
5e727364e0dc432f6ea5b157a9e9569cc03b3b26b2db34b070b7c7dd81df484e

SHA512
e9f72d24a640900d95243152a912881cc260e220e8c0a289a2feae956118f6d869beb697adc80aa77d1be2dcc2c2809375e420bcc33b2098df83112aa8dbfa70

Download Submit
C:\Windows\server.exe

Filesize
694KB

MD5
60526be0422ff21338477a2db15e0585

SHA1
87d802a77e22ed3d7ac84ece3247fa60e55f6be5

SHA256
5e727364e0dc432f6ea5b157a9e9569cc03b3b26b2db34b070b7c7dd81df484e

SHA512
e9f72d24a640900d95243152a912881cc260e220e8c0a289a2feae956118f6d869beb697adc80aa77d1be2dcc2c2809375e420bcc33b2098df83112aa8dbfa70

Download Submit
memory/328-138-0x0000000000000000-mapping.dmp

Download
memory/2180-135-0x0000000000000000-mapping.dmp

Download
memory/2252-132-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads