darkcomet | a91538569450d03ccab04981d182a90feee1ef623825849c05df3826cbeec25d

Analysis

max time kernel
112s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
26/07/2024, 01:24

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General

Target
48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe
Size 559KB
Sample240726-bswfxaxejq
SHA256 a91538569450d03ccab04981d182a90feee1ef623825849c05df3826cbeec25d
MD5 48bfbcdac6fefdc5f4f94a6ffdb0c0b0
SHA1 18e19d2f55a2ee10bc01b3e33fa06e6fd39e2b7d
SHA512 2682ab54251eeb1276e43e3200af1df32f1b88266e90050f9df48338458c81864b02b70329afbabf45ecd0fd8bec9fbc322f89303daf1f02cb4200dbdb14c77f
SSDEEP 12288:x+xOrozCCYaCphtIYJb6lzOqPpFOblme0pLLsbii9cWDeO7HtoNmKzoSj:COEzCFaCpAYJbwzOqPUlvOsmi9c8SlR
MD5 SHA1 SHA512 SSDEEP

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

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

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe

Executes dropped EXE 2 IoCs

pid	Process
3052	mcsft.exe
2236	mcsft.exe

UPX packed file 20 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5068-0-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral2/files/0x0009000000023468-16.dat	upx
behavioral2/memory/5068-29-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral2/memory/2236-32-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-34-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-35-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/3052-37-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral2/memory/2236-38-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-39-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-40-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-41-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-44-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-43-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-42-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-45-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-46-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-49-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-51-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-53-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/2236-55-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Mcrosoft = "C:\\Users\\Admin\\AppData\\Roaming\\mcsft.exe"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3052 set thread context of 2236	3052	mcsft.exe	92

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mcsft.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mcsft.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.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

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

T1012

System Information Discovery

T1082

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

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2236	mcsft.exe
Token: SeSecurityPrivilege	2236	mcsft.exe
Token: SeTakeOwnershipPrivilege	2236	mcsft.exe
Token: SeLoadDriverPrivilege	2236	mcsft.exe
Token: SeSystemProfilePrivilege	2236	mcsft.exe
Token: SeSystemtimePrivilege	2236	mcsft.exe
Token: SeProfSingleProcessPrivilege	2236	mcsft.exe
Token: SeIncBasePriorityPrivilege	2236	mcsft.exe
Token: SeCreatePagefilePrivilege	2236	mcsft.exe
Token: SeBackupPrivilege	2236	mcsft.exe
Token: SeRestorePrivilege	2236	mcsft.exe
Token: SeShutdownPrivilege	2236	mcsft.exe
Token: SeDebugPrivilege	2236	mcsft.exe
Token: SeSystemEnvironmentPrivilege	2236	mcsft.exe
Token: SeChangeNotifyPrivilege	2236	mcsft.exe
Token: SeRemoteShutdownPrivilege	2236	mcsft.exe
Token: SeUndockPrivilege	2236	mcsft.exe
Token: SeManageVolumePrivilege	2236	mcsft.exe
Token: SeImpersonatePrivilege	2236	mcsft.exe
Token: SeCreateGlobalPrivilege	2236	mcsft.exe
Token: 33	2236	mcsft.exe
Token: 34	2236	mcsft.exe
Token: 35	2236	mcsft.exe
Token: 36	2236	mcsft.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
5068	48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe
3052	mcsft.exe
2236	mcsft.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 5068 wrote to memory of 2224	5068	48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe	87
PID 5068 wrote to memory of 2224	5068	48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe	87
PID 5068 wrote to memory of 2224	5068	48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe	87
PID 2224 wrote to memory of 208	2224	cmd.exe	90
PID 2224 wrote to memory of 208	2224	cmd.exe	90
PID 2224 wrote to memory of 208	2224	cmd.exe	90
PID 5068 wrote to memory of 3052	5068	48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe	91
PID 5068 wrote to memory of 3052	5068	48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe	91
PID 5068 wrote to memory of 3052	5068	48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe	91
PID 3052 wrote to memory of 2236	3052	mcsft.exe	92
PID 3052 wrote to memory of 2236	3052	mcsft.exe	92
PID 3052 wrote to memory of 2236	3052	mcsft.exe	92
PID 3052 wrote to memory of 2236	3052	mcsft.exe	92
PID 3052 wrote to memory of 2236	3052	mcsft.exe	92
PID 3052 wrote to memory of 2236	3052	mcsft.exe	92
PID 3052 wrote to memory of 2236	3052	mcsft.exe	92
PID 3052 wrote to memory of 2236	3052	mcsft.exe	92

C:\Users\Admin\AppData\Local\Temp\48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe
"C:\Users\Admin\AppData\Local\Temp\48bfbcdac6fefdc5f4f94a6ffdb0c0b0N.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5068
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DNeXB.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2224
- - 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:208
- 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:3052
- - 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:2236

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

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

DNeXB.txt

Path C:\Users\Admin\AppData\Local\Temp\DNeXB.txt
Size 135B
SHA256 c98e20d46d6465febb5d29cfab51241521ea5d6cd621f5e18b9b7d6fbfac3f0f
MD5 a5feca573884d76f559b996d45e8ad9a
SHA1 0e81a993f3af4e31d60653dc2513186f0495f1c8
SHA512 a9239648b5f15eac4d4151b6e1bdc81065eeaeb101404c2a0126f03bc87f1e6a57206bfa07a44379e9d3bba889e4497a9991ff41fb109099b01512df3dc3cbda
MD5 SHA1 SHA512

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mcsft.txt

Path C:\Users\Admin\AppData\Roaming\mcsft.txt
Size 559KB
SHA256 54896baa3ca47fd016c46621f52f1929a5028368c267d635674b6e8740d8d5a9
MD5 78d9b6accc8d4ad0d964a562fcae67be
SHA1 5f2e2a75750114e9b0b2c8f07b18895e3a76d39e
SHA512 abd7f645ae4e1fafd7c6197ea72683a2f50fa39fee9839645258230669a034542f150b843a6b7a73cceb30210976b45c10c999b1833cd50538d5ccf56ebcc8b8
SSDEEP 12288:x+xOrozCCYaCphtIYJb6lzOqPpFOblme0pLLsbii9cWDeO7HtoNmKzoSF:COEzCFaCpAYJbwzOqPUlvOsmi9c8SlL
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2236-40-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-45-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-32-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-34-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-35-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-55-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-38-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-39-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-53-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-41-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-44-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-43-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-42-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-51-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-46-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2236-49-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/3052-37-0x0000000000400000-0x00000000007C8000-memory.dmp

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memory/5068-29-0x0000000000400000-0x00000000007C8000-memory.dmp

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memory/5068-0-0x0000000000400000-0x00000000007C8000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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