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
61s
max time network
61s
platform
windows10_x64
resource
win10v20201028
submitted
18-11-2020 13:38

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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 4048 created 2804	4048	WerFault.exe	92

Executes dropped EXE 2 IoCs

pid	Process
828	wincommon.exe
2804	svchost.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\PLA\System\f4d236fdec2fd03914189c3b26e5cb0dfea9d761	wincommon.exe
File created	C:\Windows\Resources\Maps\pure\svchost.exe	wincommon.exe
File created	C:\Windows\Resources\Maps\pure\f4d236fdec2fd03914189c3b26e5cb0dfea9d761	wincommon.exe
File created	C:\Windows\PLA\System\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
4048	2804	WerFault.exe	92

Creates scheduled task(s) 1 TTPs 4 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1796	schtasks.exe
2012	schtasks.exe
2352	schtasks.exe
2528	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.bin.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
828	wincommon.exe
2804	svchost.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe
4048	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	828	wincommon.exe
Token: SeDebugPrivilege	2804	svchost.exe
Token: SeDebugPrivilege	4048	WerFault.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4692 wrote to memory of 724	4692	ForceOp 2.8.7 - By RaiSence.bin.exe	75
PID 4692 wrote to memory of 724	4692	ForceOp 2.8.7 - By RaiSence.bin.exe	75
PID 4692 wrote to memory of 724	4692	ForceOp 2.8.7 - By RaiSence.bin.exe	75
PID 4692 wrote to memory of 2288	4692	ForceOp 2.8.7 - By RaiSence.bin.exe	76
PID 4692 wrote to memory of 2288	4692	ForceOp 2.8.7 - By RaiSence.bin.exe	76
PID 4692 wrote to memory of 2288	4692	ForceOp 2.8.7 - By RaiSence.bin.exe	76
PID 724 wrote to memory of 628	724	WScript.exe	79
PID 724 wrote to memory of 628	724	WScript.exe	79
PID 724 wrote to memory of 628	724	WScript.exe	79
PID 628 wrote to memory of 828	628	cmd.exe	82
PID 628 wrote to memory of 828	628	cmd.exe	82
PID 828 wrote to memory of 1796	828	wincommon.exe	84
PID 828 wrote to memory of 1796	828	wincommon.exe	84
PID 828 wrote to memory of 2012	828	wincommon.exe	86
PID 828 wrote to memory of 2012	828	wincommon.exe	86
PID 828 wrote to memory of 2352	828	wincommon.exe	88
PID 828 wrote to memory of 2352	828	wincommon.exe	88
PID 828 wrote to memory of 2528	828	wincommon.exe	90
PID 828 wrote to memory of 2528	828	wincommon.exe	90
PID 828 wrote to memory of 2804	828	wincommon.exe	92
PID 828 wrote to memory of 2804	828	wincommon.exe	92

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:4692
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\intofont\1Udi0TDz635jTrMWFNrE4kqnOIuYIi.vbe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:724
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\intofont\xLg6v1j1ZJy5DZ1pz826KfZq2BmfLM.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:628
  - - 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:828
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Documents and Settings\WmiPrvSE.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:1796
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Windows\PLA\System\svchost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2012
    - - 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:2352
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "svchost" /sc ONLOGON /tr "'C:\Windows\Resources\Maps\pure\svchost.exe'" /rl HIGHEST /f
        5⤵
        Creates scheduled task(s)
        
        PID:2528
    - - C:\Windows\Resources\Maps\pure\svchost.exe
        
        "C:\Windows\Resources\Maps\pure\svchost.exe"
        5⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2804
      - C:\Windows\system32\WerFault.exe
        
        C:\Windows\system32\WerFault.exe -u -p 2804 -s 1788
        6⤵
        Suspicious use of NtCreateProcessExOtherParentProcess
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4048
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\intofont\msg.vbs"
  2⤵
  PID:2288

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/828-14-0x0000000002D50000-0x0000000002D51000-memory.dmp

Filesize
4KB

Download
memory/828-12-0x00000000009C0000-0x00000000009C1000-memory.dmp

Filesize
4KB

Download
memory/828-11-0x00007FFCF2830000-0x00007FFCF321C000-memory.dmp

Filesize
9.9MB

Download
memory/2804-22-0x00007FFCF2830000-0x00007FFCF321C000-memory.dmp

Filesize
9.9MB

Download
memory/4048-27-0x0000025F09470000-0x0000025F09471000-memory.dmp

Filesize
4KB

Download
memory/4048-26-0x0000025F09470000-0x0000025F09471000-memory.dmp

Filesize
4KB

Download
memory/4048-45-0x0000025F0A1E0000-0x0000025F0A1E1000-memory.dmp

Filesize
4KB

Download
memory/4048-46-0x0000025F0A1E0000-0x0000025F0A1E1000-memory.dmp

Filesize
4KB

Download