darkcomet | 8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357

Analysis

max time kernel
150s
max time network
143s
platform
windows10_x64
resource
win10v20201028
submitted
13/11/2020, 15:32

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General

Target
8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Size 251KB
Sample201113-scgp1zpta6
SHA256 8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357
MD5 530119807d27adea9b69bcbf9aad4f0b
SHA1 37c487c8363d9f4e730772ceb135e1a3d330b121
SHA512 295342c759e0da72e18e2c2967d9df4173f05d81d8dbc3472ec6e29a6cc1729008e26830e412c995ed19b94008b77cd8c61e49af26ed41006ff351afbdb867be
MD5 SHA1 SHA512

Score

10^/10

darkcomet evasion persistence rat trojan upx

Malware Config

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:\\Users\\Admin\\AppData\\Roaming\\Temp\\Microsoft.NET.exe"	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	Microsoft.NET.exe

Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112

Executes dropped EXE 1 IoCs

pid	Process
208	Microsoft.NET.exe

Sets file to hidden 1 TTPs
Modifies file attributes to stop it showing in Explorer etc.
evasion

Hidden Files and Directories
T1158

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x000200000001ab64-3.dat	upx
behavioral2/files/0x000200000001ab64-4.dat	upx

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	Microsoft.NET.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	Microsoft.NET.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microsoft.NET = "C:\\Users\\Admin\\AppData\\Roaming\\Temp\\Microsoft.NET.exe"	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe

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
208	Microsoft.NET.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeSecurityPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeTakeOwnershipPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeLoadDriverPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeSystemProfilePrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeSystemtimePrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeProfSingleProcessPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeIncBasePriorityPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeCreatePagefilePrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeBackupPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeRestorePrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeShutdownPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeDebugPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeSystemEnvironmentPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeChangeNotifyPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeRemoteShutdownPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeUndockPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeManageVolumePrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeImpersonatePrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeCreateGlobalPrivilege	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: 33	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: 34	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: 35	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: 36	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
Token: SeIncreaseQuotaPrivilege	208	Microsoft.NET.exe
Token: SeSecurityPrivilege	208	Microsoft.NET.exe
Token: SeTakeOwnershipPrivilege	208	Microsoft.NET.exe
Token: SeLoadDriverPrivilege	208	Microsoft.NET.exe
Token: SeSystemProfilePrivilege	208	Microsoft.NET.exe
Token: SeSystemtimePrivilege	208	Microsoft.NET.exe
Token: SeProfSingleProcessPrivilege	208	Microsoft.NET.exe
Token: SeIncBasePriorityPrivilege	208	Microsoft.NET.exe
Token: SeCreatePagefilePrivilege	208	Microsoft.NET.exe
Token: SeBackupPrivilege	208	Microsoft.NET.exe
Token: SeRestorePrivilege	208	Microsoft.NET.exe
Token: SeShutdownPrivilege	208	Microsoft.NET.exe
Token: SeDebugPrivilege	208	Microsoft.NET.exe
Token: SeSystemEnvironmentPrivilege	208	Microsoft.NET.exe
Token: SeChangeNotifyPrivilege	208	Microsoft.NET.exe
Token: SeRemoteShutdownPrivilege	208	Microsoft.NET.exe
Token: SeUndockPrivilege	208	Microsoft.NET.exe
Token: SeManageVolumePrivilege	208	Microsoft.NET.exe
Token: SeImpersonatePrivilege	208	Microsoft.NET.exe
Token: SeCreateGlobalPrivilege	208	Microsoft.NET.exe
Token: 33	208	Microsoft.NET.exe
Token: 34	208	Microsoft.NET.exe
Token: 35	208	Microsoft.NET.exe
Token: 36	208	Microsoft.NET.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
208	Microsoft.NET.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1056 wrote to memory of 400	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe	76
PID 1056 wrote to memory of 400	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe	76
PID 1056 wrote to memory of 400	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe	76
PID 1056 wrote to memory of 2928	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe	77
PID 1056 wrote to memory of 2928	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe	77
PID 1056 wrote to memory of 2928	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe	77
PID 1056 wrote to memory of 208	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe	80
PID 1056 wrote to memory of 208	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe	80
PID 1056 wrote to memory of 208	1056	8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe	80
PID 400 wrote to memory of 3820	400	cmd.exe	81
PID 400 wrote to memory of 3820	400	cmd.exe	81
PID 400 wrote to memory of 3820	400	cmd.exe	81
PID 2928 wrote to memory of 2888	2928	cmd.exe	82
PID 2928 wrote to memory of 2888	2928	cmd.exe	82
PID 2928 wrote to memory of 2888	2928	cmd.exe	82
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83
PID 208 wrote to memory of 1372	208	Microsoft.NET.exe	83

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
3820	attrib.exe
2888	attrib.exe

C:\Users\Admin\AppData\Local\Temp\8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe
"C:\Users\Admin\AppData\Local\Temp\8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1056
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:400
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\8237c56fb8d1968bafeb63ebd64ef362b9efc3b923e57e3732870076e04bf357.exe" +s +h
    3⤵
    - Views/modifies file attributes
    PID:3820
- 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:2928
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Views/modifies file attributes
    PID:2888
- C:\Users\Admin\AppData\Roaming\Temp\Microsoft.NET.exe
  "C:\Users\Admin\AppData\Roaming\Temp\Microsoft.NET.exe"
  2⤵
  - Modifies security service
  - Executes dropped EXE
  - Windows security modification
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:208
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    PID:1372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Disabling Security Tools

T1089

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1372-8-0x00000000031B0000-0x00000000031B1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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