dcrat | a2d3d6430f6775951cf988d960cfae4093d7a1e4d0f684ddfffaf4599ace9a71

Resubmissions

18-11-2020 14:18

201118-dj27sn3f52 10

18-11-2020 13:42

201118-1arz86e7w6 10

18-11-2020 13:38

201118-n8jh228ctn 10

Analysis

max time kernel
1712s
max time network
1723s
platform
windows10_x64
resource
win10v20201028
submitted
18-11-2020 14:18

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General

Target

ForceOp 2.8.7 - By RaiSence.bin.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 3948 created 2416	3948	WerFault.exe	87

Executes dropped EXE 2 IoCs

pid	Process
3444	wincommon.exe
2416	svchost.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
3948	2416	WerFault.exe	87

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1664	schtasks.exe
3832	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings	ForceOp 2.8.7 - By RaiSence.bin.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
3444	wincommon.exe
2416	svchost.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe
3948	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3444	wincommon.exe
Token: SeDebugPrivilege	2416	svchost.exe
Token: SeDebugPrivilege	3948	WerFault.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3920 wrote to memory of 1628	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	74
PID 3920 wrote to memory of 1628	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	74
PID 3920 wrote to memory of 1628	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	74
PID 3920 wrote to memory of 2464	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	75
PID 3920 wrote to memory of 2464	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	75
PID 3920 wrote to memory of 2464	3920	ForceOp 2.8.7 - By RaiSence.bin.exe	75
PID 1628 wrote to memory of 1568	1628	WScript.exe	80
PID 1628 wrote to memory of 1568	1628	WScript.exe	80
PID 1628 wrote to memory of 1568	1628	WScript.exe	80
PID 1568 wrote to memory of 3444	1568	cmd.exe	82
PID 1568 wrote to memory of 3444	1568	cmd.exe	82
PID 3444 wrote to memory of 3832	3444	wincommon.exe	83
PID 3444 wrote to memory of 3832	3444	wincommon.exe	83
PID 3444 wrote to memory of 1664	3444	wincommon.exe	85
PID 3444 wrote to memory of 1664	3444	wincommon.exe	85
PID 3444 wrote to memory of 2416	3444	wincommon.exe	87
PID 3444 wrote to memory of 2416	3444	wincommon.exe	87

C:\Users\Admin\AppData\Local\Temp\ForceOp 2.8.7 - By RaiSence.bin.exe
"C:\Users\Admin\AppData\Local\Temp\ForceOp 2.8.7 - By RaiSence.bin.exe"
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3920
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\intofont\1Udi0TDz635jTrMWFNrE4kqnOIuYIi.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1628
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\intofont\xLg6v1j1ZJy5DZ1pz826KfZq2BmfLM.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1568
  - - C:\intofont\wincommon.exe
      "C:\intofont\wincommon.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3444
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\PerfLogs\svchost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:3832
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\svchost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1664
    - - C:\Recovery\WindowsRE\svchost.exe
        
        "C:\Recovery\WindowsRE\svchost.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2416
      - C:\Windows\system32\WerFault.exe
        
        C:\Windows\system32\WerFault.exe -u -p 2416 -s 1512
        6⤵
        Suspicious use of NtCreateProcessExOtherParentProcess
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3948
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\intofont\msg.vbs"
  2⤵
  PID:2464

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

Replay Monitor

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Downloads

memory/2416-31-0x00007FF90A690000-0x00007FF90B07C000-memory.dmp

Filesize
9.9MB

Download
memory/3444-25-0x0000000001200000-0x0000000001201000-memory.dmp

Filesize
4KB

Download
memory/3444-22-0x00007FF90A690000-0x00007FF90B07C000-memory.dmp

Filesize
9.9MB

Download
memory/3444-23-0x0000000000960000-0x0000000000961000-memory.dmp

Filesize
4KB

Download
memory/3948-35-0x0000021DCAF10000-0x0000021DCAF11000-memory.dmp

Filesize
4KB

Download
memory/3948-51-0x0000021DCBC80000-0x0000021DCBC81000-memory.dmp

Filesize
4KB

Download
memory/3948-52-0x0000021DCBC80000-0x0000021DCBC81000-memory.dmp

Filesize
4KB

Download
memory/3948-54-0x0000021DCBC80000-0x0000021DCBC81000-memory.dmp

Filesize
4KB

Download