dcrat | 1bf6d14c4b5f59aa30882f4aa25e9e9d703dac905a785fe020ff667600e5fc97

Analysis

max time kernel
286s
max time network
298s
platform
windows10_x64
resource
win10v20201028
submitted
18-11-2020 15:58

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General

Target

ForceOp 2.8.7 - By RaiSence.exe

Score

10^/10

dcrat 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

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 3508 created 3812	3508	WerFault.exe	90

Executes dropped EXE 2 IoCs

pid	Process
1336	wincommon.exe
3812	wininit.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\authman\f4d236fdec2fd03914189c3b26e5cb0dfea9d761	wincommon.exe
File created	C:\Windows\InputMethod\CHT\svchost.exe	wincommon.exe
File created	C:\Windows\InputMethod\CHT\f4d236fdec2fd03914189c3b26e5cb0dfea9d761	wincommon.exe
File created	C:\Windows\Microsoft.NET\authman\svchost.exe	wincommon.exe
File opened for modification	C:\Windows\Microsoft.NET\authman\svchost.exe	wincommon.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3508	3812	WerFault.exe	90

Creates scheduled task(s) 1 TTPs 3 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
2168	schtasks.exe
3588	schtasks.exe
2436	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings	ForceOp 2.8.7 - By RaiSence.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
1336	wincommon.exe
3812	wininit.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe
3508	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1336	wincommon.exe
Token: SeDebugPrivilege	3812	wininit.exe
Token: SeDebugPrivilege	3508	WerFault.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 728 wrote to memory of 3768	728	ForceOp 2.8.7 - By RaiSence.exe	75
PID 728 wrote to memory of 3768	728	ForceOp 2.8.7 - By RaiSence.exe	75
PID 728 wrote to memory of 3768	728	ForceOp 2.8.7 - By RaiSence.exe	75
PID 728 wrote to memory of 2836	728	ForceOp 2.8.7 - By RaiSence.exe	76
PID 728 wrote to memory of 2836	728	ForceOp 2.8.7 - By RaiSence.exe	76
PID 728 wrote to memory of 2836	728	ForceOp 2.8.7 - By RaiSence.exe	76
PID 3768 wrote to memory of 648	3768	WScript.exe	77
PID 3768 wrote to memory of 648	3768	WScript.exe	77
PID 3768 wrote to memory of 648	3768	WScript.exe	77
PID 648 wrote to memory of 1336	648	cmd.exe	79
PID 648 wrote to memory of 1336	648	cmd.exe	79
PID 1336 wrote to memory of 2168	1336	wincommon.exe	83
PID 1336 wrote to memory of 2168	1336	wincommon.exe	83
PID 1336 wrote to memory of 3588	1336	wincommon.exe	86
PID 1336 wrote to memory of 3588	1336	wincommon.exe	86
PID 1336 wrote to memory of 2436	1336	wincommon.exe	88
PID 1336 wrote to memory of 2436	1336	wincommon.exe	88
PID 1336 wrote to memory of 3812	1336	wincommon.exe	90
PID 1336 wrote to memory of 3812	1336	wincommon.exe	90

C:\Users\Admin\AppData\Local\Temp\ForceOp 2.8.7 - By RaiSence.exe
"C:\Users\Admin\AppData\Local\Temp\ForceOp 2.8.7 - By RaiSence.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:728
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\intofont\1Udi0TDz635jTrMWFNrE4kqnOIuYIi.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3768
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\intofont\xLg6v1j1ZJy5DZ1pz826KfZq2BmfLM.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:648
  - - C:\intofont\wincommon.exe
      "C:\intofont\wincommon.exe"
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1336
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Windows\Microsoft.NET\authman\svchost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2168
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Windows\InputMethod\CHT\svchost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:3588
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "wininit" /sc ONLOGON /tr "'C:\intofont\wininit.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2436
    - - C:\intofont\wininit.exe
        
        "C:\intofont\wininit.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3812
      - C:\Windows\system32\WerFault.exe
        
        C:\Windows\system32\WerFault.exe -u -p 3812 -s 1824
        6⤵
        Suspicious use of NtCreateProcessExOtherParentProcess
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3508
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\intofont\msg.vbs"
  2⤵
  PID:2836

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1336-24-0x00007FF99FA40000-0x00007FF9A042C000-memory.dmp

Filesize
9.9MB

Download
memory/1336-25-0x0000000000DC0000-0x0000000000DC1000-memory.dmp

Filesize
4KB

Download
memory/1336-27-0x0000000001450000-0x0000000001451000-memory.dmp

Filesize
4KB

Download
memory/3508-38-0x0000013AA2AB0000-0x0000013AA2AB1000-memory.dmp

Filesize
4KB

Download
memory/3508-57-0x0000013AA3820000-0x0000013AA3821000-memory.dmp

Filesize
4KB

Download
memory/3508-58-0x0000013AA3820000-0x0000013AA3821000-memory.dmp

Filesize
4KB

Download
memory/3508-39-0x0000013AA2AB0000-0x0000013AA2AB1000-memory.dmp

Filesize
4KB

Download
memory/3812-34-0x00007FF99FA40000-0x00007FF9A042C000-memory.dmp

Filesize
9.9MB

Download