dcrat | 993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1

General

Target

JaffaCakes118_993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1.exe
Size

1.3MB
MD5

4e46c09323f0bdde212da251fa27bd56
SHA1

17e390046edad88a491f2283d57839e8f4dd868d
SHA256

993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1
SHA512

86f5e147941d1d24737828d0a9704d66d09ef4d8fd4ee692de07e5410240614c1c3e766b2ae84fa5d80eaa232d9be247ddec7e15091b2c6426887e8e08f0e002
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 6 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	1800	2540	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2864	2540	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2700	2540	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2780	2540	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2548	2540	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2608	2540	schtasks.exe	35

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x000800000001747b-9.dat	dcrat
behavioral1/memory/2092-13-0x0000000000FD0000-0x00000000010E0000-memory.dmp	dcrat

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2984	powershell.exe
2992	powershell.exe
1852	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2092	DllCommonsvc.exe
1448	DllCommonsvc.exe

Loads dropped DLL 2 IoCs

pid	Process
1776	cmd.exe
1776	cmd.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Mail\OSPPSVC.exe	DllCommonsvc.exe
File created	C:\Program Files\Windows Mail\1610b97d3ab4a7	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_993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1.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 6 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2608	schtasks.exe
1800	schtasks.exe
2864	schtasks.exe
2700	schtasks.exe
2780	schtasks.exe
2548	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2092	DllCommonsvc.exe
2992	powershell.exe
2984	powershell.exe
1852	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2092	DllCommonsvc.exe
Token: SeDebugPrivilege	1448	DllCommonsvc.exe
Token: SeDebugPrivilege	2992	powershell.exe
Token: SeDebugPrivilege	2984	powershell.exe
Token: SeDebugPrivilege	1852	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2120 wrote to memory of 2956	2120	JaffaCakes118_993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1.exe	31
PID 2120 wrote to memory of 2956	2120	JaffaCakes118_993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1.exe	31
PID 2120 wrote to memory of 2956	2120	JaffaCakes118_993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1.exe	31
PID 2120 wrote to memory of 2956	2120	JaffaCakes118_993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1.exe	31
PID 2956 wrote to memory of 1776	2956	WScript.exe	32
PID 2956 wrote to memory of 1776	2956	WScript.exe	32
PID 2956 wrote to memory of 1776	2956	WScript.exe	32
PID 2956 wrote to memory of 1776	2956	WScript.exe	32
PID 1776 wrote to memory of 2092	1776	cmd.exe	34
PID 1776 wrote to memory of 2092	1776	cmd.exe	34
PID 1776 wrote to memory of 2092	1776	cmd.exe	34
PID 1776 wrote to memory of 2092	1776	cmd.exe	34
PID 2092 wrote to memory of 2984	2092	DllCommonsvc.exe	42
PID 2092 wrote to memory of 2984	2092	DllCommonsvc.exe	42
PID 2092 wrote to memory of 2984	2092	DllCommonsvc.exe	42
PID 2092 wrote to memory of 1852	2092	DllCommonsvc.exe	44
PID 2092 wrote to memory of 1852	2092	DllCommonsvc.exe	44
PID 2092 wrote to memory of 1852	2092	DllCommonsvc.exe	44
PID 2092 wrote to memory of 2992	2092	DllCommonsvc.exe	45
PID 2092 wrote to memory of 2992	2092	DllCommonsvc.exe	45
PID 2092 wrote to memory of 2992	2092	DllCommonsvc.exe	45
PID 2092 wrote to memory of 1448	2092	DllCommonsvc.exe	48
PID 2092 wrote to memory of 1448	2092	DllCommonsvc.exe	48
PID 2092 wrote to memory of 1448	2092	DllCommonsvc.exe	48

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_993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_993498fb9e4e7b3a4ae403494e78dc9f153fbe40f7f66cd62348ecf2b096ded1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2120
- 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:2956
- - 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:1776
  - - 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:2092
    - - 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:2984
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\lsass.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1852
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Windows Mail\OSPPSVC.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2992
    - - C:\providercommon\DllCommonsvc.exe
        
        "C:\providercommon\DllCommonsvc.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1448

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\providercommon\lsass.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1800

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\providercommon\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2864

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\providercommon\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows Mail\OSPPSVC.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2780

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2548

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Mail\OSPPSVC.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2608

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\LISXBSMR0KT195RCDK6C.temp

Filesize
7KB

MD5
41234b46e92365f294b3120794419940

SHA1
1c7617316cfd6668deaed4ab46996512ee257bbb

SHA256
685a8dc59f9dc080f2e3e1b3a6cc908f8f4f821b2b2b24c0440e9bcfc5bc7dd8

SHA512
0217e6d524a189120bd2f692b297761a8fe38160d1f36f98f5a0d520f9917206ebd62e98edb7c574dfddf899fe4c1574ad8c3cf63c62a03a9c0543f371f5c24d

Download Submit
C:\providercommon\1zu9dW.bat

Filesize
36B

MD5
6783c3ee07c7d151ceac57f1f9c8bed7

SHA1
17468f98f95bf504cc1f83c49e49a78526b3ea03

SHA256
8ab782f0f327a2021530e7230d3aee8abbecb7eed59482a3a46e78b9e3862322

SHA512
c6012d4bfac1ed14d0fd9f0eabd0e1c3d647b343db292a907b246271d52a4b7469c809db43910ddba2e8c5045f9cb3d24d0af62d363281e6cb8b39ee94a183e8

Download Submit
C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe

Filesize
197B

MD5
8088241160261560a02c84025d107592

SHA1
083121f7027557570994c9fc211df61730455bb5

SHA256
2072cc9a4a3b84d4c5178ab41c5588eea7d0103e3928e34d64f17bf97f3d1cc1

SHA512
20d9369dd359315848ea30144383a0bb479d86059fdbc3b3256ac84f998193512feb3b1799ab663619920c99fe7e0ebba33ada31a3855094b956fcd351c90478

Download Submit
\providercommon\DllCommonsvc.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
memory/2092-13-0x0000000000FD0000-0x00000000010E0000-memory.dmp

Filesize
1.1MB

Download
memory/2092-14-0x0000000000340000-0x0000000000352000-memory.dmp

Filesize
72KB

Download
memory/2092-15-0x0000000000360000-0x000000000036C000-memory.dmp

Filesize
48KB

Download
memory/2092-16-0x0000000000350000-0x000000000035C000-memory.dmp

Filesize
48KB

Download
memory/2092-17-0x0000000000380000-0x000000000038C000-memory.dmp

Filesize
48KB

Download
memory/2992-37-0x000000001B790000-0x000000001BA72000-memory.dmp

Filesize
2.9MB

Download
memory/2992-38-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads