darkcomet | 301c9a9b0936d1ea247feb4acc049a46dc07c793424424256cabcbdc2fdd0f34

Analysis

max time kernel
119s
max time network
16s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
22/07/2024, 02:29

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General

Target
4910f222d85a166fd1e592fba2e34770N.exe
Size 576KB
Sample240722-cymxdsvenf
SHA256 301c9a9b0936d1ea247feb4acc049a46dc07c793424424256cabcbdc2fdd0f34
MD5 4910f222d85a166fd1e592fba2e34770
SHA1 ceaf1d364efbe03a29a15a0f19afd08318cce395
SHA512 95995d63b99ef2ae792c698648e0b380ccf0e02e18283bdfae00435553f70370a20c7b5f9e51b238a5db782358dcbbf9c8357b92868f15472edfa65cd67af926
SSDEEP 12288:+NWPkHlUkErBuxQ4uzi6d6dL/yiXLzeMdK6io8levy0FhVlpzkzDDoSI:+NWPkHlUfBgpuPdWzyuDTifgyWlR
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet 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

Executes dropped EXE 2 IoCs

pid	Process
2720	mcsft.exe
2104	mcsft.exe

Loads dropped DLL 6 IoCs

pid	Process
2384	4910f222d85a166fd1e592fba2e34770N.exe
2384	4910f222d85a166fd1e592fba2e34770N.exe
2384	4910f222d85a166fd1e592fba2e34770N.exe
2384	4910f222d85a166fd1e592fba2e34770N.exe
2384	4910f222d85a166fd1e592fba2e34770N.exe
2720	mcsft.exe

UPX packed file 27 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2384-0-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral1/files/0x00080000000187a7-28.dat	upx
behavioral1/memory/2720-46-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral1/memory/2384-48-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral1/memory/2104-53-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2720-57-0x0000000000400000-0x00000000007C8000-memory.dmp	upx
behavioral1/memory/2104-58-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-56-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-59-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-60-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-61-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-63-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-65-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-64-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-66-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-67-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-68-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-69-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-71-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-72-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-73-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-74-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-75-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-76-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2104-77-0x0000000000400000-0x00000000004B5000-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-1-5-21-1506706701-1246725540-2219210854-1000\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 2720 set thread context of 2104	2720	mcsft.exe	34

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

T1012

System Information Discovery

T1082

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

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

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2104	mcsft.exe
Token: SeSecurityPrivilege	2104	mcsft.exe
Token: SeTakeOwnershipPrivilege	2104	mcsft.exe
Token: SeLoadDriverPrivilege	2104	mcsft.exe
Token: SeSystemProfilePrivilege	2104	mcsft.exe
Token: SeSystemtimePrivilege	2104	mcsft.exe
Token: SeProfSingleProcessPrivilege	2104	mcsft.exe
Token: SeIncBasePriorityPrivilege	2104	mcsft.exe
Token: SeCreatePagefilePrivilege	2104	mcsft.exe
Token: SeBackupPrivilege	2104	mcsft.exe
Token: SeRestorePrivilege	2104	mcsft.exe
Token: SeShutdownPrivilege	2104	mcsft.exe
Token: SeDebugPrivilege	2104	mcsft.exe
Token: SeSystemEnvironmentPrivilege	2104	mcsft.exe
Token: SeChangeNotifyPrivilege	2104	mcsft.exe
Token: SeRemoteShutdownPrivilege	2104	mcsft.exe
Token: SeUndockPrivilege	2104	mcsft.exe
Token: SeManageVolumePrivilege	2104	mcsft.exe
Token: SeImpersonatePrivilege	2104	mcsft.exe
Token: SeCreateGlobalPrivilege	2104	mcsft.exe
Token: 33	2104	mcsft.exe
Token: 34	2104	mcsft.exe
Token: 35	2104	mcsft.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2384	4910f222d85a166fd1e592fba2e34770N.exe
2720	mcsft.exe
2104	mcsft.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2384 wrote to memory of 2572	2384	4910f222d85a166fd1e592fba2e34770N.exe	30
PID 2384 wrote to memory of 2572	2384	4910f222d85a166fd1e592fba2e34770N.exe	30
PID 2384 wrote to memory of 2572	2384	4910f222d85a166fd1e592fba2e34770N.exe	30
PID 2384 wrote to memory of 2572	2384	4910f222d85a166fd1e592fba2e34770N.exe	30
PID 2572 wrote to memory of 2792	2572	cmd.exe	32
PID 2572 wrote to memory of 2792	2572	cmd.exe	32
PID 2572 wrote to memory of 2792	2572	cmd.exe	32
PID 2572 wrote to memory of 2792	2572	cmd.exe	32
PID 2384 wrote to memory of 2720	2384	4910f222d85a166fd1e592fba2e34770N.exe	33
PID 2384 wrote to memory of 2720	2384	4910f222d85a166fd1e592fba2e34770N.exe	33
PID 2384 wrote to memory of 2720	2384	4910f222d85a166fd1e592fba2e34770N.exe	33
PID 2384 wrote to memory of 2720	2384	4910f222d85a166fd1e592fba2e34770N.exe	33
PID 2720 wrote to memory of 2104	2720	mcsft.exe	34
PID 2720 wrote to memory of 2104	2720	mcsft.exe	34
PID 2720 wrote to memory of 2104	2720	mcsft.exe	34
PID 2720 wrote to memory of 2104	2720	mcsft.exe	34
PID 2720 wrote to memory of 2104	2720	mcsft.exe	34
PID 2720 wrote to memory of 2104	2720	mcsft.exe	34
PID 2720 wrote to memory of 2104	2720	mcsft.exe	34
PID 2720 wrote to memory of 2104	2720	mcsft.exe	34
PID 2720 wrote to memory of 2104	2720	mcsft.exe	34

C:\Users\Admin\AppData\Local\Temp\4910f222d85a166fd1e592fba2e34770N.exe
"C:\Users\Admin\AppData\Local\Temp\4910f222d85a166fd1e592fba2e34770N.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\pSblw.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2572
- - 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:2792
- C:\Users\Admin\AppData\Roaming\mcsft.exe
  "C:\Users\Admin\AppData\Roaming\mcsft.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2720
- - 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:2104

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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pSblw.bat

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

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mcsft.exe

Path \Users\Admin\AppData\Roaming\mcsft.exe
Size 576KB
SHA256 df1e76736dee97107aeda714a91b0d5465b9ced0847d36af7833f1cd3bb621c8
MD5 134b4e4531d41a1fc6eda93f052a3b03
SHA1 b9221f0d21887986721c07c3f2606c6c448286e0
SHA512 c6e2ff40fc1204ee2031085758a8cfd35c7f74294e1f12419e6747c49750e5cdea4509ee4e81be23cb54a151fe68529c4cde2c889c8737be574f7571a631e021
SSDEEP 12288:+NWPkHlUkErBuxQ4uzi6d6dL/yiXLzeMdK6io8levy0FhVlpzkzDDoSL:+NWPkHlUfBgpuPdWzyuDTifgyWlY
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/2104-68-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-71-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-77-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-76-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-75-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-74-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-53-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-73-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-58-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-56-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-59-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-60-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-61-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-62-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-72-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-64-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-63-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-66-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-67-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-65-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-69-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2104-70-0x0000000000400000-0x00000000004B5000-memory.dmp

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memory/2384-0-0x0000000000400000-0x00000000007C8000-memory.dmp

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memory/2384-42-0x0000000003850000-0x0000000003C18000-memory.dmp

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memory/2384-48-0x0000000000400000-0x00000000007C8000-memory.dmp

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memory/2384-43-0x0000000003850000-0x0000000003C18000-memory.dmp

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memory/2384-44-0x0000000003850000-0x0000000003C18000-memory.dmp

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memory/2720-57-0x0000000000400000-0x00000000007C8000-memory.dmp

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memory/2720-46-0x0000000000400000-0x00000000007C8000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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