darkcomet | 26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422

General

Target

26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe
Size

559KB
MD5

38e231e0d35c22835aa17d526fe32150
SHA1

dda6917b40f8ad09266fbad549c0e2368d8c34c0
SHA256

26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422
SHA512

8c915daa82f13f386c749ce965159a4d8fe24197764ae571a215ed449084fdce373c229424cf30b898dfa6761253d4a670186c79b7742c7d1ebee41fbc0aea61
SSDEEP

12288:x+xOrozCCYaCphtIYJb6lzOqPpFOblme0pLLsbii9cWDeO7HtoNmKzoST:COEzCFaCpAYJbwzOqPUlvOsmi9c8SlR

Score

10^/10

darkcomet discovery persistence rat trojan upx

Malware Config

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Darkcomet family
darkcomet
Checks BIOS information in registry 2 TTPs 1 IoCs
BIOS information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

mcsft.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate 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

T1012

System Information Discovery

T1082

Processes:

26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe

Executes dropped EXE 2 IoCs

Processes:

mcsft.exemcsft.exe

pid process

2988 mcsft.exe
4124 mcsft.exe

pid	process
2988	mcsft.exe
4124	mcsft.exe

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-1-5-21-4050598569-1597076380-177084960-1000\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 target process

PID 2988 set thread context of 4124 2988 mcsft.exe mcsft.exe

description	pid	process	target process
PID 2988 set thread context of 4124	2988	mcsft.exe	mcsft.exe

UPX packed file 20 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3516-0-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
C:\Users\Admin\AppData\Roaming\mcsft.txt	upx
behavioral2/memory/3516-29-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral2/memory/4124-32-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-35-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2988-36-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral2/memory/4124-39-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-37-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-41-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-40-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-42-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-44-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-43-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-45-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-46-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-48-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-50-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-52-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-54-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4124-56-0x0000000000400000-0x00000000004B5000-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:

26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.execmd.exereg.exemcsft.exemcsft.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mcsft.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mcsft.exe

Checks processor information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

mcsft.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	mcsft.exe
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

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

mcsft.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier 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	4124	mcsft.exe
Token: SeSecurityPrivilege	4124	mcsft.exe
Token: SeTakeOwnershipPrivilege	4124	mcsft.exe
Token: SeLoadDriverPrivilege	4124	mcsft.exe
Token: SeSystemProfilePrivilege	4124	mcsft.exe
Token: SeSystemtimePrivilege	4124	mcsft.exe
Token: SeProfSingleProcessPrivilege	4124	mcsft.exe
Token: SeIncBasePriorityPrivilege	4124	mcsft.exe
Token: SeCreatePagefilePrivilege	4124	mcsft.exe
Token: SeBackupPrivilege	4124	mcsft.exe
Token: SeRestorePrivilege	4124	mcsft.exe
Token: SeShutdownPrivilege	4124	mcsft.exe
Token: SeDebugPrivilege	4124	mcsft.exe
Token: SeSystemEnvironmentPrivilege	4124	mcsft.exe
Token: SeChangeNotifyPrivilege	4124	mcsft.exe
Token: SeRemoteShutdownPrivilege	4124	mcsft.exe
Token: SeUndockPrivilege	4124	mcsft.exe
Token: SeManageVolumePrivilege	4124	mcsft.exe
Token: SeImpersonatePrivilege	4124	mcsft.exe
Token: SeCreateGlobalPrivilege	4124	mcsft.exe
Token: 33	4124	mcsft.exe
Token: 34	4124	mcsft.exe
Token: 35	4124	mcsft.exe
Token: 36	4124	mcsft.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exemcsft.exemcsft.exe

pid process

3516 26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe
2988 mcsft.exe
4124 mcsft.exe

pid	process
3516	26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe
2988	mcsft.exe
4124	mcsft.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.execmd.exemcsft.exe

description	pid	process	target process
PID 3516 wrote to memory of 4736	3516	26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe	cmd.exe
PID 3516 wrote to memory of 4736	3516	26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe	cmd.exe
PID 3516 wrote to memory of 4736	3516	26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe	cmd.exe
PID 4736 wrote to memory of 2676	4736	cmd.exe	reg.exe
PID 4736 wrote to memory of 2676	4736	cmd.exe	reg.exe
PID 4736 wrote to memory of 2676	4736	cmd.exe	reg.exe
PID 3516 wrote to memory of 2988	3516	26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe	mcsft.exe
PID 3516 wrote to memory of 2988	3516	26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe	mcsft.exe
PID 3516 wrote to memory of 2988	3516	26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe	mcsft.exe
PID 2988 wrote to memory of 4124	2988	mcsft.exe	mcsft.exe
PID 2988 wrote to memory of 4124	2988	mcsft.exe	mcsft.exe
PID 2988 wrote to memory of 4124	2988	mcsft.exe	mcsft.exe
PID 2988 wrote to memory of 4124	2988	mcsft.exe	mcsft.exe
PID 2988 wrote to memory of 4124	2988	mcsft.exe	mcsft.exe
PID 2988 wrote to memory of 4124	2988	mcsft.exe	mcsft.exe
PID 2988 wrote to memory of 4124	2988	mcsft.exe	mcsft.exe
PID 2988 wrote to memory of 4124	2988	mcsft.exe	mcsft.exe

C:\Users\Admin\AppData\Local\Temp\26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe
"C:\Users\Admin\AppData\Local\Temp\26790a40a15ed51294738eadfc0ba540d109cadd195ea7d12c56b4fd6ef50422N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3516
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\MXBPq.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4736
- - 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
    - System Location Discovery: System Language Discovery
    PID:2676
- C:\Users\Admin\AppData\Roaming\mcsft.exe
  "C:\Users\Admin\AppData\Roaming\mcsft.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2988
- - C:\Users\Admin\AppData\Roaming\mcsft.exe
    C:\Users\Admin\AppData\Roaming\mcsft.exe
    3⤵
    - Checks BIOS information in registry
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4124

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

4

T1012

System Information Discovery

5

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\MXBPq.txt

Filesize
135B

MD5
a5feca573884d76f559b996d45e8ad9a

SHA1
0e81a993f3af4e31d60653dc2513186f0495f1c8

SHA256
c98e20d46d6465febb5d29cfab51241521ea5d6cd621f5e18b9b7d6fbfac3f0f

SHA512
a9239648b5f15eac4d4151b6e1bdc81065eeaeb101404c2a0126f03bc87f1e6a57206bfa07a44379e9d3bba889e4497a9991ff41fb109099b01512df3dc3cbda

Download Submit
C:\Users\Admin\AppData\Roaming\mcsft.txt

Filesize
559KB

MD5
757b08702f0a53038ce1453251086ad5

SHA1
45b872f09da061a4c35eac5764d49a937f3dff73

SHA256
4a0f77f4e93d7cc2305a0c3fd8ed1f97c8d4e0cb441d00493ea6f29c5202f5d3

SHA512
591391fd5bb0eae40262bc8f8303a6efd96ad5d5b6e8b68fe60a4bedbbf09ef3dd025fcdc4b020a4ef2776eb09fa2331eee18602fe46ca5f9de5d309937e59c2

Download Submit
memory/2988-36-0x0000000000400000-0x00000000007C8000-memory.dmp

Filesize
3.8MB

Download
memory/3516-29-0x0000000000400000-0x00000000007C8000-memory.dmp

Filesize
3.8MB

Download
memory/3516-0-0x0000000000400000-0x00000000007C8000-memory.dmp

Filesize
3.8MB

Download
memory/4124-40-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-44-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-39-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-37-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-41-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-32-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-42-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-35-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-43-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-45-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-46-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-48-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-50-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-52-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-54-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4124-56-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads