darkcomet | 3ca01a8c0bb55c92e88f57640dea04c8a8e6419721e1536bcc5a13947645c08b

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
16-12-2024 02:18

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General

Target

f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe
Size

890KB
MD5

f6d672794b8b4c02f5c671407955aa24
SHA1

aa3261f54f574fd476129562af354f8c3631c59b
SHA256

3ca01a8c0bb55c92e88f57640dea04c8a8e6419721e1536bcc5a13947645c08b
SHA512

4a6eefcc4fd84bca4ad049d30b5c8edbfd7f6a1a3cef101c64afa3b7e06b1eeb06e0ad9468bf852a84898e66cd268d5b2da3f9270e846a513a8f6e3086f94d25
SSDEEP

12288:TNdxlP9OqtG9B+2jOXUrxfyllxjfsrZwv3VBmk4NLecPqVB1oxGSIrbdd+6tCSWU:TNdxGscqlTv3VArLyB1IGSK

Score

10^/10

darkcomet new test discovery evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

New Test

meteor63.no-ip.org:1604

Mutex

DC_MUTEX-XR5ADYH

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
GVYsL3brnVb8
install
true
offline_keylogger
false
password
12345
persistence
true
reg_key
explorer

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Darkcomet family
darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\MSDCSC\\msdcsc.exe"	vbc.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2924	attrib.exe
2868	attrib.exe

Executes dropped EXE 4 IoCs

pid	Process
2156	vbc.exe
2724	vbc.exe
2728	vbc.exe
3028	msdcsc.exe

Loads dropped DLL 4 IoCs

pid	Process
2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe
2156	vbc.exe
2156	vbc.exe
2724	vbc.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\explorer = "C:\\Windows\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2172 set thread context of 2156	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe	30
PID 2156 set thread context of 2724	2156	vbc.exe	31
PID 2156 set thread context of 2728	2156	vbc.exe	32

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2724-26-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/2724-28-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/2724-31-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/2724-34-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/2724-44-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/2724-55-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/2724-50-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/2724-47-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/2724-46-0x0000000000400000-0x00000000004E8000-memory.dmp	upx
behavioral1/memory/2724-68-0x0000000000400000-0x00000000004E8000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\MSDCSC\msdcsc.exe	vbc.exe
File opened for modification	C:\Windows\MSDCSC\msdcsc.exe	vbc.exe
File opened for modification	C:\Windows\MSDCSC\	vbc.exe

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 9 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	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdcsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeDebugPrivilege	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	2724	vbc.exe
Token: SeSecurityPrivilege	2724	vbc.exe
Token: SeTakeOwnershipPrivilege	2724	vbc.exe
Token: SeLoadDriverPrivilege	2724	vbc.exe
Token: SeSystemProfilePrivilege	2724	vbc.exe
Token: SeSystemtimePrivilege	2724	vbc.exe
Token: SeProfSingleProcessPrivilege	2724	vbc.exe
Token: SeIncBasePriorityPrivilege	2724	vbc.exe
Token: SeCreatePagefilePrivilege	2724	vbc.exe
Token: SeBackupPrivilege	2724	vbc.exe
Token: SeRestorePrivilege	2724	vbc.exe
Token: SeShutdownPrivilege	2724	vbc.exe
Token: SeDebugPrivilege	2724	vbc.exe
Token: SeSystemEnvironmentPrivilege	2724	vbc.exe
Token: SeChangeNotifyPrivilege	2724	vbc.exe
Token: SeRemoteShutdownPrivilege	2724	vbc.exe
Token: SeUndockPrivilege	2724	vbc.exe
Token: SeManageVolumePrivilege	2724	vbc.exe
Token: SeImpersonatePrivilege	2724	vbc.exe
Token: SeCreateGlobalPrivilege	2724	vbc.exe
Token: 33	2724	vbc.exe
Token: 34	2724	vbc.exe
Token: 35	2724	vbc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2156	vbc.exe
2728	vbc.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 2156	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe	30
PID 2172 wrote to memory of 2156	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe	30
PID 2172 wrote to memory of 2156	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe	30
PID 2172 wrote to memory of 2156	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe	30
PID 2172 wrote to memory of 2156	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe	30
PID 2172 wrote to memory of 2156	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe	30
PID 2172 wrote to memory of 2156	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe	30
PID 2172 wrote to memory of 2156	2172	f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe	30
PID 2156 wrote to memory of 2724	2156	vbc.exe	31
PID 2156 wrote to memory of 2724	2156	vbc.exe	31
PID 2156 wrote to memory of 2724	2156	vbc.exe	31
PID 2156 wrote to memory of 2724	2156	vbc.exe	31
PID 2156 wrote to memory of 2724	2156	vbc.exe	31
PID 2156 wrote to memory of 2724	2156	vbc.exe	31
PID 2156 wrote to memory of 2724	2156	vbc.exe	31
PID 2156 wrote to memory of 2724	2156	vbc.exe	31
PID 2156 wrote to memory of 2728	2156	vbc.exe	32
PID 2156 wrote to memory of 2728	2156	vbc.exe	32
PID 2156 wrote to memory of 2728	2156	vbc.exe	32
PID 2156 wrote to memory of 2728	2156	vbc.exe	32
PID 2156 wrote to memory of 2728	2156	vbc.exe	32
PID 2156 wrote to memory of 2728	2156	vbc.exe	32
PID 2156 wrote to memory of 2728	2156	vbc.exe	32
PID 2156 wrote to memory of 2728	2156	vbc.exe	32
PID 2724 wrote to memory of 2364	2724	vbc.exe	33
PID 2724 wrote to memory of 2364	2724	vbc.exe	33
PID 2724 wrote to memory of 2364	2724	vbc.exe	33
PID 2724 wrote to memory of 2364	2724	vbc.exe	33
PID 2724 wrote to memory of 2356	2724	vbc.exe	34
PID 2724 wrote to memory of 2356	2724	vbc.exe	34
PID 2724 wrote to memory of 2356	2724	vbc.exe	34
PID 2724 wrote to memory of 2356	2724	vbc.exe	34
PID 2364 wrote to memory of 2924	2364	cmd.exe	37
PID 2364 wrote to memory of 2924	2364	cmd.exe	37
PID 2364 wrote to memory of 2924	2364	cmd.exe	37
PID 2364 wrote to memory of 2924	2364	cmd.exe	37
PID 2356 wrote to memory of 2868	2356	cmd.exe	38
PID 2356 wrote to memory of 2868	2356	cmd.exe	38
PID 2356 wrote to memory of 2868	2356	cmd.exe	38
PID 2356 wrote to memory of 2868	2356	cmd.exe	38
PID 2724 wrote to memory of 3028	2724	vbc.exe	39
PID 2724 wrote to memory of 3028	2724	vbc.exe	39
PID 2724 wrote to memory of 3028	2724	vbc.exe	39
PID 2724 wrote to memory of 3028	2724	vbc.exe	39

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2924	attrib.exe
2868	attrib.exe

C:\Users\Admin\AppData\Local\Temp\f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f6d672794b8b4c02f5c671407955aa24_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  C:\Users\Admin\AppData\Local\Temp\vbc.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:2156
- - C:\Users\Admin\AppData\Local\Temp\vbc.exe
    C:\Users\Admin\AppData\Local\Temp\vbc.exe
    3⤵
    - Modifies WinLogon for persistence
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2724
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\vbc.exe" +s +h
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2364
    - - C:\Windows\SysWOW64\attrib.exe
        
        attrib "C:\Users\Admin\AppData\Local\Temp\vbc.exe" +s +h
        5⤵
        Sets file to hidden
        System Location Discovery: System Language Discovery
        Views/modifies file attributes
        
        PID:2924
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2356
    - - C:\Windows\SysWOW64\attrib.exe
        
        attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
        5⤵
        Sets file to hidden
        System Location Discovery: System Language Discovery
        Views/modifies file attributes
        
        PID:2868
  - - C:\Windows\MSDCSC\msdcsc.exe
      "C:\Windows\MSDCSC\msdcsc.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:3028
- - C:\Users\Admin\AppData\Local\Temp\vbc.exe
    C:\Users\Admin\AppData\Local\Temp\vbc.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\vbc.exe

Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/2156-52-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/2156-7-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/2156-15-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/2156-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2156-11-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/2156-9-0x0000000000400000-0x0000000000474000-memory.dmp

Filesize
464KB

Download
memory/2172-1-0x00000000743C0000-0x000000007496B000-memory.dmp

Filesize
5.7MB

Download
memory/2172-0-0x00000000743C1000-0x00000000743C2000-memory.dmp

Filesize
4KB

Download
memory/2172-21-0x00000000743C0000-0x000000007496B000-memory.dmp

Filesize
5.7MB

Download
memory/2172-2-0x00000000743C0000-0x000000007496B000-memory.dmp

Filesize
5.7MB

Download
memory/2724-68-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-46-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-26-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-24-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-50-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-34-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-28-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-47-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-44-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-55-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2724-31-0x0000000000400000-0x00000000004E8000-memory.dmp

Filesize
928KB

Download
memory/2728-35-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/2728-43-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/2728-39-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/2728-60-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download
memory/2728-58-0x0000000000410000-0x00000000004EF000-memory.dmp

Filesize
892KB

Download
memory/2728-37-0x0000000000400000-0x0000000000405000-memory.dmp

Filesize
20KB

Download