darkcomet | dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0

Analysis

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

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
03-01-2025 12:17

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General

Target

dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe
Size

589KB
MD5

7d57575fe8124d51e6d13d66c58c25a0
SHA1

45f3c10d8b7e10fba9db6bd522f3a8ae04546ecd
SHA256

dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0
SHA512

53ee167f71ad917a4516fc139f5dab275dcdf9b26f6fd17d40fabbacf9b1f57e1524b9f765ee9fe65b4c7892f89bbd5da071a9c5988c6098c8d0954bb3f312bb
SSDEEP

12288:9ffLtEIQIu7k5sscLsD5iZqHyscNExmj1NT5BzYQR8NxOz8Y5oSv:9fTOIQIu7k5DzvLxm5Bl8sf

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

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

Executes dropped EXE 3 IoCs

pid	Process
2928	mcsft.exe
2628	mcsft.exe
2232	mcsft.exe

Loads dropped DLL 7 IoCs

pid	Process
2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe
2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe
2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe
2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe
2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe
2928	mcsft.exe
2928	mcsft.exe

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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\Mcrosoft = "C:\\Users\\Admin\\AppData\\Roaming\\mcsft.exe"	reg.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2928 set thread context of 2628	2928	mcsft.exe	34
PID 2928 set thread context of 2232	2928	mcsft.exe	35

UPX packed file 33 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2280-2-0x0000000000400000-0x00000000007EA000-memory.dmp	upx
behavioral1/files/0x0009000000016d71-27.dat	upx
behavioral1/memory/2928-49-0x0000000000400000-0x00000000007EA000-memory.dmp	upx
behavioral1/memory/2280-48-0x0000000000400000-0x00000000007EA000-memory.dmp	upx
behavioral1/memory/2628-54-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-62-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-61-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2928-60-0x0000000000400000-0x00000000007EA000-memory.dmp	upx
behavioral1/memory/2232-57-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2628-63-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2232-69-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2628-72-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-75-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-74-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-73-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-71-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2232-66-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2232-65-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2628-76-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2232-77-0x0000000000400000-0x0000000000409000-memory.dmp	upx
behavioral1/memory/2628-78-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-80-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-81-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-83-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-85-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-87-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-89-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-91-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-93-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-95-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-97-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/2628-99-0x0000000000400000-0x00000000004B5000-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 6 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	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.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
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

description	ioc	Process
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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	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: SeDebugPrivilege	2232	mcsft.exe
Token: SeIncreaseQuotaPrivilege	2628	mcsft.exe
Token: SeSecurityPrivilege	2628	mcsft.exe
Token: SeTakeOwnershipPrivilege	2628	mcsft.exe
Token: SeLoadDriverPrivilege	2628	mcsft.exe
Token: SeSystemProfilePrivilege	2628	mcsft.exe
Token: SeSystemtimePrivilege	2628	mcsft.exe
Token: SeProfSingleProcessPrivilege	2628	mcsft.exe
Token: SeIncBasePriorityPrivilege	2628	mcsft.exe
Token: SeCreatePagefilePrivilege	2628	mcsft.exe
Token: SeBackupPrivilege	2628	mcsft.exe
Token: SeRestorePrivilege	2628	mcsft.exe
Token: SeShutdownPrivilege	2628	mcsft.exe
Token: SeDebugPrivilege	2628	mcsft.exe
Token: SeSystemEnvironmentPrivilege	2628	mcsft.exe
Token: SeChangeNotifyPrivilege	2628	mcsft.exe
Token: SeRemoteShutdownPrivilege	2628	mcsft.exe
Token: SeUndockPrivilege	2628	mcsft.exe
Token: SeManageVolumePrivilege	2628	mcsft.exe
Token: SeImpersonatePrivilege	2628	mcsft.exe
Token: SeCreateGlobalPrivilege	2628	mcsft.exe
Token: 33	2628	mcsft.exe
Token: 34	2628	mcsft.exe
Token: 35	2628	mcsft.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe
2928	mcsft.exe
2232	mcsft.exe
2628	mcsft.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 2692	2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe	30
PID 2280 wrote to memory of 2692	2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe	30
PID 2280 wrote to memory of 2692	2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe	30
PID 2280 wrote to memory of 2692	2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe	30
PID 2692 wrote to memory of 2988	2692	cmd.exe	32
PID 2692 wrote to memory of 2988	2692	cmd.exe	32
PID 2692 wrote to memory of 2988	2692	cmd.exe	32
PID 2692 wrote to memory of 2988	2692	cmd.exe	32
PID 2280 wrote to memory of 2928	2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe	33
PID 2280 wrote to memory of 2928	2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe	33
PID 2280 wrote to memory of 2928	2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe	33
PID 2280 wrote to memory of 2928	2280	dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe	33
PID 2928 wrote to memory of 2628	2928	mcsft.exe	34
PID 2928 wrote to memory of 2628	2928	mcsft.exe	34
PID 2928 wrote to memory of 2628	2928	mcsft.exe	34
PID 2928 wrote to memory of 2628	2928	mcsft.exe	34
PID 2928 wrote to memory of 2628	2928	mcsft.exe	34
PID 2928 wrote to memory of 2628	2928	mcsft.exe	34
PID 2928 wrote to memory of 2628	2928	mcsft.exe	34
PID 2928 wrote to memory of 2628	2928	mcsft.exe	34
PID 2928 wrote to memory of 2628	2928	mcsft.exe	34
PID 2928 wrote to memory of 2232	2928	mcsft.exe	35
PID 2928 wrote to memory of 2232	2928	mcsft.exe	35
PID 2928 wrote to memory of 2232	2928	mcsft.exe	35
PID 2928 wrote to memory of 2232	2928	mcsft.exe	35
PID 2928 wrote to memory of 2232	2928	mcsft.exe	35
PID 2928 wrote to memory of 2232	2928	mcsft.exe	35
PID 2928 wrote to memory of 2232	2928	mcsft.exe	35
PID 2928 wrote to memory of 2232	2928	mcsft.exe	35
PID 2928 wrote to memory of 2232	2928	mcsft.exe	35

C:\Users\Admin\AppData\Local\Temp\dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe
"C:\Users\Admin\AppData\Local\Temp\dca7f803c64d843e64c8bdfe515b02746caf82d2c44f92bc275077af56b7a7d0N.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tzNrl.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2692
- - 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:2988
- 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
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2928
- - 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:2628
- - C:\Users\Admin\AppData\Roaming\mcsft.exe
    C:\Users\Admin\AppData\Roaming\mcsft.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2232

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

C:\Users\Admin\AppData\Local\Temp\tzNrl.bat

Filesize
135B

MD5
a5feca573884d76f559b996d45e8ad9a

SHA1
0e81a993f3af4e31d60653dc2513186f0495f1c8

SHA256
c98e20d46d6465febb5d29cfab51241521ea5d6cd621f5e18b9b7d6fbfac3f0f

SHA512
a9239648b5f15eac4d4151b6e1bdc81065eeaeb101404c2a0126f03bc87f1e6a57206bfa07a44379e9d3bba889e4497a9991ff41fb109099b01512df3dc3cbda

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

Filesize
589KB

MD5
56c5451a3380aab34a2b8aa4d1fcc82c

SHA1
5bc8f304fa6dde4543c5393c52f6929cd936df5f

SHA256
238bab0ef9d05aecc1006b22ab917fc67ee04397ce5f6ede37747f0033c6c448

SHA512
eca0137358ae3f7b372705addc9d335fe755ce22d8933fd68d520429eb7954b7daada071634d751ea20056c84f91b3e223d7bf13cf35b4239fc5b713065d4b11

Download Submit
memory/2232-65-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2232-57-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2232-69-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2232-77-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2232-66-0x0000000000400000-0x0000000000409000-memory.dmp

Filesize
36KB

Download
memory/2280-42-0x0000000003B30000-0x0000000003F1A000-memory.dmp

Filesize
3.9MB

Download
memory/2280-44-0x0000000003B30000-0x0000000003F1A000-memory.dmp

Filesize
3.9MB

Download
memory/2280-45-0x0000000003B30000-0x0000000003F1A000-memory.dmp

Filesize
3.9MB

Download
memory/2280-48-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/2280-2-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/2280-43-0x0000000003B30000-0x0000000003F1A000-memory.dmp

Filesize
3.9MB

Download
memory/2628-74-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-78-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-99-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-72-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-75-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-61-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-73-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-71-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-70-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-62-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-54-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-76-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-97-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-63-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-80-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-81-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-83-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-85-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-87-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-89-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-91-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-93-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2628-95-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/2928-49-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download
memory/2928-60-0x0000000000400000-0x00000000007EA000-memory.dmp

Filesize
3.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads