darkcomet | 8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2

System Information Discovery

Processes:

mcsft.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	mcsft.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

Processes:

8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\Control Panel\International\Geo\Nation	8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe

Executes dropped EXE 2 IoCs

Processes:

mcsft.exemcsft.exe

pid	Process
3096	mcsft.exe
3816	mcsft.exe

UPX packed file 31 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4076-0-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral2/files/0x000b000000023b8f-16.dat	upx
behavioral2/memory/3096-28-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral2/memory/4076-30-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral2/memory/3816-33-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-36-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-37-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3096-39-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral2/memory/3816-40-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-41-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-43-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-42-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-46-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-45-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-44-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-47-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-48-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-49-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-50-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-51-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-53-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-54-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-55-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-56-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-57-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-58-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-59-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-60-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-61-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3816-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-17203666-93769886-2545153620-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Mcrosoft = "C:\\Users\\Admin\\AppData\\Roaming\\mcsft.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

mcsft.exe

description	pid	Process	procid_target
PID 3096 set thread context of 3816	3096	mcsft.exe	91

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

Processes:

mcsft.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	mcsft.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	mcsft.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	mcsft.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	mcsft.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

System Information Discovery

Processes:

mcsft.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	mcsft.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

mcsft.exe

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3816	mcsft.exe
Token: SeSecurityPrivilege	3816	mcsft.exe
Token: SeTakeOwnershipPrivilege	3816	mcsft.exe
Token: SeLoadDriverPrivilege	3816	mcsft.exe
Token: SeSystemProfilePrivilege	3816	mcsft.exe
Token: SeSystemtimePrivilege	3816	mcsft.exe
Token: SeProfSingleProcessPrivilege	3816	mcsft.exe
Token: SeIncBasePriorityPrivilege	3816	mcsft.exe
Token: SeCreatePagefilePrivilege	3816	mcsft.exe
Token: SeBackupPrivilege	3816	mcsft.exe
Token: SeRestorePrivilege	3816	mcsft.exe
Token: SeShutdownPrivilege	3816	mcsft.exe
Token: SeDebugPrivilege	3816	mcsft.exe
Token: SeSystemEnvironmentPrivilege	3816	mcsft.exe
Token: SeChangeNotifyPrivilege	3816	mcsft.exe
Token: SeRemoteShutdownPrivilege	3816	mcsft.exe
Token: SeUndockPrivilege	3816	mcsft.exe
Token: SeManageVolumePrivilege	3816	mcsft.exe
Token: SeImpersonatePrivilege	3816	mcsft.exe
Token: SeCreateGlobalPrivilege	3816	mcsft.exe
Token: 33	3816	mcsft.exe
Token: 34	3816	mcsft.exe
Token: 35	3816	mcsft.exe
Token: 36	3816	mcsft.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exemcsft.exemcsft.exe

pid	Process
4076	8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe
3096	mcsft.exe
3816	mcsft.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.execmd.exemcsft.exe

description	pid	Process	procid_target
PID 4076 wrote to memory of 3332	4076	8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe	83
PID 4076 wrote to memory of 3332	4076	8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe	83
PID 4076 wrote to memory of 3332	4076	8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe	83
PID 3332 wrote to memory of 1476	3332	cmd.exe	86
PID 3332 wrote to memory of 1476	3332	cmd.exe	86
PID 3332 wrote to memory of 1476	3332	cmd.exe	86
PID 4076 wrote to memory of 3096	4076	8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe	89
PID 4076 wrote to memory of 3096	4076	8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe	89
PID 4076 wrote to memory of 3096	4076	8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe	89
PID 3096 wrote to memory of 3816	3096	mcsft.exe	91
PID 3096 wrote to memory of 3816	3096	mcsft.exe	91
PID 3096 wrote to memory of 3816	3096	mcsft.exe	91
PID 3096 wrote to memory of 3816	3096	mcsft.exe	91
PID 3096 wrote to memory of 3816	3096	mcsft.exe	91
PID 3096 wrote to memory of 3816	3096	mcsft.exe	91
PID 3096 wrote to memory of 3816	3096	mcsft.exe	91
PID 3096 wrote to memory of 3816	3096	mcsft.exe	91

C:\Users\Admin\AppData\Local\Temp\8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe
"C:\Users\Admin\AppData\Local\Temp\8d2a8167e80ff936aa765fd6725bf6e6a56d7183b7222459042f84957e53e2b2.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4076
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\hgpor.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3332
- - C:\Windows\SysWOW64\reg.exe
    REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "Mcrosoft" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\mcsft.exe" /f
    3⤵
    - Adds Run key to start application
    PID:1476
- C:\Users\Admin\AppData\Roaming\mcsft.exe
  "C:\Users\Admin\AppData\Roaming\mcsft.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3096
- - C:\Users\Admin\AppData\Roaming\mcsft.exe
    C:\Users\Admin\AppData\Roaming\mcsft.exe
    3⤵
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3816

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

4

System Information Discovery

5