dcrat | 8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 03:31

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General

Target

JaffaCakes118_8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3.exe
Size

1.3MB
MD5

68a6c4b48a55ee457576a3c5d584b416
SHA1

1885e7607cbf7f018e60f97606fb7b55bbef581f
SHA256

8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3
SHA512

ba6e8113b31bfb9e4cd5c49fdb1eb5e0217164e26a7e31152330c935e3a5fd6674088d4e8b67acf0175ba365600804fc9ac4a54a72d4c2bb1514ef141e4919be
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	1252	2532	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1712	2532	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2484	2532	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2624	2532	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2124	2532	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2092	2532	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2572	2532	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1264	2532	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2992	2532	schtasks.exe	34

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x000800000001628b-10.dat	dcrat
behavioral1/memory/2996-13-0x0000000000120000-0x0000000000230000-memory.dmp	dcrat
behavioral1/memory/1556-46-0x0000000000DA0000-0x0000000000EB0000-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
864	powershell.exe
2880	powershell.exe
2956	powershell.exe
2888	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2996	DllCommonsvc.exe
1556	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
2960	cmd.exe
2960	cmd.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\IME\IMESC5\applets\sppsvc.exe	DllCommonsvc.exe
File created	C:\Windows\SysWOW64\IME\IMESC5\applets\0a1fd5f707cd16	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_8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3.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
2124	schtasks.exe
2092	schtasks.exe
2572	schtasks.exe
2992	schtasks.exe
1712	schtasks.exe
2624	schtasks.exe
1264	schtasks.exe
1252	schtasks.exe
2484	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2996	DllCommonsvc.exe
864	powershell.exe
2888	powershell.exe
2880	powershell.exe
2956	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2996	DllCommonsvc.exe
Token: SeDebugPrivilege	864	powershell.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeDebugPrivilege	2880	powershell.exe
Token: SeDebugPrivilege	1556	csrss.exe
Token: SeDebugPrivilege	2956	powershell.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2612 wrote to memory of 2860	2612	JaffaCakes118_8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3.exe	30
PID 2612 wrote to memory of 2860	2612	JaffaCakes118_8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3.exe	30
PID 2612 wrote to memory of 2860	2612	JaffaCakes118_8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3.exe	30
PID 2612 wrote to memory of 2860	2612	JaffaCakes118_8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3.exe	30
PID 2860 wrote to memory of 2960	2860	WScript.exe	31
PID 2860 wrote to memory of 2960	2860	WScript.exe	31
PID 2860 wrote to memory of 2960	2860	WScript.exe	31
PID 2860 wrote to memory of 2960	2860	WScript.exe	31
PID 2960 wrote to memory of 2996	2960	cmd.exe	33
PID 2960 wrote to memory of 2996	2960	cmd.exe	33
PID 2960 wrote to memory of 2996	2960	cmd.exe	33
PID 2960 wrote to memory of 2996	2960	cmd.exe	33
PID 2996 wrote to memory of 864	2996	DllCommonsvc.exe	44
PID 2996 wrote to memory of 864	2996	DllCommonsvc.exe	44
PID 2996 wrote to memory of 864	2996	DllCommonsvc.exe	44
PID 2996 wrote to memory of 2880	2996	DllCommonsvc.exe	45
PID 2996 wrote to memory of 2880	2996	DllCommonsvc.exe	45
PID 2996 wrote to memory of 2880	2996	DllCommonsvc.exe	45
PID 2996 wrote to memory of 2888	2996	DllCommonsvc.exe	46
PID 2996 wrote to memory of 2888	2996	DllCommonsvc.exe	46
PID 2996 wrote to memory of 2888	2996	DllCommonsvc.exe	46
PID 2996 wrote to memory of 2956	2996	DllCommonsvc.exe	47
PID 2996 wrote to memory of 2956	2996	DllCommonsvc.exe	47
PID 2996 wrote to memory of 2956	2996	DllCommonsvc.exe	47
PID 2996 wrote to memory of 1556	2996	DllCommonsvc.exe	52
PID 2996 wrote to memory of 1556	2996	DllCommonsvc.exe	52
PID 2996 wrote to memory of 1556	2996	DllCommonsvc.exe	52

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_8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_8a021c480e3ba578ba266cabfc607948831844bf37bdd984206623376b7bdcc3.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2612
- 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:2860
- - 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:2960
  - - C:\providercommon\DllCommonsvc.exe
      "C:\providercommon\DllCommonsvc.exe"
      4⤵
      Executes dropped EXE
      Drops file in System32 directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2996
    - - 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:864
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\csrss.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2880
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\480d7142-91a3-11ef-b9f6-6e5a89f5a3c7\conhost.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2888
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\SysWOW64\IME\IMESC5\applets\sppsvc.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2956
    - - C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\csrss.exe
        
        "C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\csrss.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1252

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1712

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2484

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 5 /tr "'C:\Recovery\480d7142-91a3-11ef-b9f6-6e5a89f5a3c7\conhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2624

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Recovery\480d7142-91a3-11ef-b9f6-6e5a89f5a3c7\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2124

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 8 /tr "'C:\Recovery\480d7142-91a3-11ef-b9f6-6e5a89f5a3c7\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2092

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 12 /tr "'C:\Windows\SysWOW64\IME\IMESC5\applets\sppsvc.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2572

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\SysWOW64\IME\IMESC5\applets\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1264

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 9 /tr "'C:\Windows\SysWOW64\IME\IMESC5\applets\sppsvc.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2992

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
d04414c7b8be47da5747771752e32265

SHA1
b8bd618bd96c7f64ff4ecb4dc0b6660c7aee65f1

SHA256
577facc7b82cc93d47c4312bc8241f2f8fc360979fe5be13f43cee82a0f30321

SHA512
0dda3355423830f00ea898832400ac26955fed4aa0984ce089b5005f8aef3e095b10b3d979b43f5c5e73d66d88ebc783acb4e33a4302284c1c9fb2a146eca208

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/864-45-0x0000000001F00000-0x0000000001F08000-memory.dmp

Filesize
32KB

Download
memory/1556-46-0x0000000000DA0000-0x0000000000EB0000-memory.dmp

Filesize
1.1MB

Download
memory/2888-44-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2996-13-0x0000000000120000-0x0000000000230000-memory.dmp

Filesize
1.1MB

Download
memory/2996-14-0x0000000000460000-0x0000000000472000-memory.dmp

Filesize
72KB

Download
memory/2996-15-0x0000000000470000-0x000000000047C000-memory.dmp

Filesize
48KB

Download
memory/2996-16-0x0000000000480000-0x000000000048C000-memory.dmp

Filesize
48KB

Download
memory/2996-17-0x0000000000490000-0x000000000049C000-memory.dmp

Filesize
48KB

Download