dcrat | baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 05:49

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General

Target

JaffaCakes118_baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed.exe
Size

1.3MB
MD5

73042d9bec44dae4e0c98547ba688c4f
SHA1

ff66202cb7af090090e7cbb0546f43fea11f0b72
SHA256

baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed
SHA512

19bb7e7bf853d268b79edcb2fba60567431f256d8e0bd7ab749f76de8ec05a02f1abfc1162a5041979f4166f559b72f7d29f2a379cb6fd430fa9444af630d539
SSDEEP

24576:U2G/nvxW3Ww0t6TnzGmVBDh4+aknuRRZJND0gFJ4rD/IjC:UbA30GnzV/q+DnsXg

Score

10^/10

dcrat discovery execution infostealer rat

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat
Dcrat family
dcrat

Process spawned unexpected child process 9 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2848	2712	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2768	2712	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2708	2712	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2744	2712	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2664	2712	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2604	2712	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2728	2712	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2652	2712	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3020	2712	schtasks.exe	35

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0007000000015d30-12.dat	dcrat
behavioral1/memory/992-13-0x0000000000D10000-0x0000000000E20000-memory.dmp	dcrat

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1528	powershell.exe
2352	powershell.exe
864	powershell.exe
1984	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
992	DllCommonsvc.exe
108	DllCommonsvc.exe

Loads dropped DLL 2 IoCs

pid	Process
2240	cmd.exe
2240	cmd.exe

Drops file in Program Files directory 7 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Microsoft Office\Document Themes 14\services.exe	DllCommonsvc.exe
File created	C:\Program Files (x86)\Microsoft Office\Document Themes 14\c5b4cb5e9653cc	DllCommonsvc.exe
File created	C:\Program Files\Mozilla Firefox\dwm.exe	DllCommonsvc.exe
File created	C:\Program Files\Mozilla Firefox\6cb0b6c459d5d3	DllCommonsvc.exe
File created	C:\Program Files (x86)\Google\Temp\csrss.exe	DllCommonsvc.exe
File opened for modification	C:\Program Files (x86)\Google\Temp\csrss.exe	DllCommonsvc.exe
File created	C:\Program Files (x86)\Google\Temp\886983d96e3d3e	DllCommonsvc.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 3 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	JaffaCakes118_baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 9 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2604	schtasks.exe
2652	schtasks.exe
2848	schtasks.exe
2708	schtasks.exe
2664	schtasks.exe
3020	schtasks.exe
2768	schtasks.exe
2744	schtasks.exe
2728	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
992	DllCommonsvc.exe
2352	powershell.exe
864	powershell.exe
1528	powershell.exe
1984	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	992	DllCommonsvc.exe
Token: SeDebugPrivilege	2352	powershell.exe
Token: SeDebugPrivilege	864	powershell.exe
Token: SeDebugPrivilege	1528	powershell.exe
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeDebugPrivilege	108	DllCommonsvc.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 1860	2136	JaffaCakes118_baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed.exe	30
PID 2136 wrote to memory of 1860	2136	JaffaCakes118_baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed.exe	30
PID 2136 wrote to memory of 1860	2136	JaffaCakes118_baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed.exe	30
PID 2136 wrote to memory of 1860	2136	JaffaCakes118_baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed.exe	30
PID 1860 wrote to memory of 2240	1860	WScript.exe	32
PID 1860 wrote to memory of 2240	1860	WScript.exe	32
PID 1860 wrote to memory of 2240	1860	WScript.exe	32
PID 1860 wrote to memory of 2240	1860	WScript.exe	32
PID 2240 wrote to memory of 992	2240	cmd.exe	34
PID 2240 wrote to memory of 992	2240	cmd.exe	34
PID 2240 wrote to memory of 992	2240	cmd.exe	34
PID 2240 wrote to memory of 992	2240	cmd.exe	34
PID 992 wrote to memory of 2352	992	DllCommonsvc.exe	45
PID 992 wrote to memory of 2352	992	DllCommonsvc.exe	45
PID 992 wrote to memory of 2352	992	DllCommonsvc.exe	45
PID 992 wrote to memory of 1528	992	DllCommonsvc.exe	46
PID 992 wrote to memory of 1528	992	DllCommonsvc.exe	46
PID 992 wrote to memory of 1528	992	DllCommonsvc.exe	46
PID 992 wrote to memory of 1984	992	DllCommonsvc.exe	47
PID 992 wrote to memory of 1984	992	DllCommonsvc.exe	47
PID 992 wrote to memory of 1984	992	DllCommonsvc.exe	47
PID 992 wrote to memory of 864	992	DllCommonsvc.exe	49
PID 992 wrote to memory of 864	992	DllCommonsvc.exe	49
PID 992 wrote to memory of 864	992	DllCommonsvc.exe	49
PID 992 wrote to memory of 108	992	DllCommonsvc.exe	53
PID 992 wrote to memory of 108	992	DllCommonsvc.exe	53
PID 992 wrote to memory of 108	992	DllCommonsvc.exe	53

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_baa45f504688458132537495eb90ba6bec83c7d89518b43163eac23e365385ed.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1860
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\providercommon\1zu9dW.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2240
  - - C:\providercommon\DllCommonsvc.exe
      "C:\providercommon\DllCommonsvc.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:992
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\DllCommonsvc.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2352
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Google\Temp\csrss.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1528
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft Office\Document Themes 14\services.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1984
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Mozilla Firefox\dwm.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:864
    - - C:\providercommon\DllCommonsvc.exe
        
        "C:\providercommon\DllCommonsvc.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:108

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Google\Temp\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2848

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\Temp\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2768

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Google\Temp\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2708

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft Office\Document Themes 14\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Office\Document Themes 14\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2664

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft Office\Document Themes 14\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 14 /tr "'C:\Program Files\Mozilla Firefox\dwm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2728

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2652

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\Program Files\Mozilla Firefox\dwm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\2XHQT7HL03CNDLO19FEG.temp

Filesize
7KB

MD5
43bad57e726371ab00b8f8799f24a750

SHA1
a93616fa19a919e683084103853241c0efef9b3f

SHA256
dcc61aaaa39466b90ba03e06446751498a686e3d38af4e39ee2f6b23febd13ac

SHA512
48853205843f085bb66ec9b63ae75c0a76df044d7e1ff26414389377e216b78d5dfb5f2fa802ea1ad0af26cad6e966f7c51c66bf2fed1d0bb187c0d989796d39

Download Submit
C:\providercommon\1zu9dW.bat

Filesize
36B

MD5
6783c3ee07c7d151ceac57f1f9c8bed7

SHA1
17468f98f95bf504cc1f83c49e49a78526b3ea03

SHA256
8ab782f0f327a2021530e7230d3aee8abbecb7eed59482a3a46e78b9e3862322

SHA512
c6012d4bfac1ed14d0fd9f0eabd0e1c3d647b343db292a907b246271d52a4b7469c809db43910ddba2e8c5045f9cb3d24d0af62d363281e6cb8b39ee94a183e8

Download Submit
C:\providercommon\DllCommonsvc.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe

Filesize
197B

MD5
8088241160261560a02c84025d107592

SHA1
083121f7027557570994c9fc211df61730455bb5

SHA256
2072cc9a4a3b84d4c5178ab41c5588eea7d0103e3928e34d64f17bf97f3d1cc1

SHA512
20d9369dd359315848ea30144383a0bb479d86059fdbc3b3256ac84f998193512feb3b1799ab663619920c99fe7e0ebba33ada31a3855094b956fcd351c90478

Download Submit
memory/992-13-0x0000000000D10000-0x0000000000E20000-memory.dmp

Filesize
1.1MB

Download
memory/992-14-0x0000000000650000-0x0000000000662000-memory.dmp

Filesize
72KB

Download
memory/992-15-0x0000000000660000-0x000000000066C000-memory.dmp

Filesize
48KB

Download
memory/992-16-0x0000000000A10000-0x0000000000A1C000-memory.dmp

Filesize
48KB

Download
memory/992-17-0x0000000000A20000-0x0000000000A2C000-memory.dmp

Filesize
48KB

Download
memory/2352-34-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2352-35-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download