dcrat | 527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-12-2024 16:18

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9.exe
Size

1.3MB
MD5

3f632bedb25973558f6d03d3c331fbc2
SHA1

4e8957a1833502fcc251f33e81471c33bb9a2822
SHA256

527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9
SHA512

bcb0a4cae2d791e31ebc1364aef5486a53319c1b953de7517ee21c9b06a4e4a144335afebb80d5354557f7e3c869d5b6b6b504f09a89744c629505e33636c9d4
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	2696	2668	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2568	2668	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2868	2668	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2832	2668	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2820	2668	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2576	2668	schtasks.exe	35

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0008000000018bf3-11.dat	dcrat
behavioral1/memory/2864-13-0x00000000009D0000-0x0000000000AE0000-memory.dmp	dcrat
behavioral1/memory/2492-45-0x0000000000FA0000-0x00000000010B0000-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
3012	powershell.exe
2608	powershell.exe
2656	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2864	DllCommonsvc.exe
2492	services.exe

Loads dropped DLL 2 IoCs

pid	Process
1856	cmd.exe
1856	cmd.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.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
2696	schtasks.exe
2568	schtasks.exe
2868	schtasks.exe
2832	schtasks.exe
2820	schtasks.exe
2576	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2864	DllCommonsvc.exe
2656	powershell.exe
2608	powershell.exe
3012	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2864	DllCommonsvc.exe
Token: SeDebugPrivilege	2656	powershell.exe
Token: SeDebugPrivilege	2608	powershell.exe
Token: SeDebugPrivilege	3012	powershell.exe
Token: SeDebugPrivilege	2492	services.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 1972	3048	527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9.exe	30
PID 3048 wrote to memory of 1972	3048	527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9.exe	30
PID 3048 wrote to memory of 1972	3048	527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9.exe	30
PID 3048 wrote to memory of 1972	3048	527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9.exe	30
PID 1972 wrote to memory of 1856	1972	WScript.exe	31
PID 1972 wrote to memory of 1856	1972	WScript.exe	31
PID 1972 wrote to memory of 1856	1972	WScript.exe	31
PID 1972 wrote to memory of 1856	1972	WScript.exe	31
PID 1856 wrote to memory of 2864	1856	cmd.exe	34
PID 1856 wrote to memory of 2864	1856	cmd.exe	34
PID 1856 wrote to memory of 2864	1856	cmd.exe	34
PID 1856 wrote to memory of 2864	1856	cmd.exe	34
PID 2864 wrote to memory of 2608	2864	DllCommonsvc.exe	42
PID 2864 wrote to memory of 2608	2864	DllCommonsvc.exe	42
PID 2864 wrote to memory of 2608	2864	DllCommonsvc.exe	42
PID 2864 wrote to memory of 2656	2864	DllCommonsvc.exe	43
PID 2864 wrote to memory of 2656	2864	DllCommonsvc.exe	43
PID 2864 wrote to memory of 2656	2864	DllCommonsvc.exe	43
PID 2864 wrote to memory of 3012	2864	DllCommonsvc.exe	44
PID 2864 wrote to memory of 3012	2864	DllCommonsvc.exe	44
PID 2864 wrote to memory of 3012	2864	DllCommonsvc.exe	44
PID 2864 wrote to memory of 2328	2864	DllCommonsvc.exe	48
PID 2864 wrote to memory of 2328	2864	DllCommonsvc.exe	48
PID 2864 wrote to memory of 2328	2864	DllCommonsvc.exe	48
PID 2328 wrote to memory of 1040	2328	cmd.exe	50
PID 2328 wrote to memory of 1040	2328	cmd.exe	50
PID 2328 wrote to memory of 1040	2328	cmd.exe	50
PID 2328 wrote to memory of 2492	2328	cmd.exe	51
PID 2328 wrote to memory of 2492	2328	cmd.exe	51
PID 2328 wrote to memory of 2492	2328	cmd.exe	51

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\527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9.exe
"C:\Users\Admin\AppData\Local\Temp\527cccee7317629a8c06efc3d9a32c6c80b296c71618e8364c9b03185e676df9.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3048
- 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:1972
- - 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:1856
  - - C:\providercommon\DllCommonsvc.exe
      "C:\providercommon\DllCommonsvc.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2864
    - - 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:2608
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\cmd.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2656
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\services.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3012
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\3qIDwt1oDr.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2328
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:1040
      - C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\services.exe
        
        "C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\services.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:2492

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\cmd.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2696

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2568

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2868

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2832

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2820

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2576

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\3qIDwt1oDr.bat

Filesize
240B

MD5
21f16089dd14512e8e6d0935364c35e0

SHA1
c3c5784f51d9e535a647dc8eb8df90278d6a209d

SHA256
e93390c9671e4aa66a6b349ac3e0d2854fa53eb21688a4c1dd96f11e398a28ba

SHA512
ec6268942793d8704c9cbc372c4469bc88de6833448bc033ca6ab41b2e93a3e0a15ad05a57dd879688a76e9af4aa34a0ef9506e9fc89a83e98d3a312155e44f7

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

Filesize
7KB

MD5
99fe697e9ec4c47f8a2f09186991037e

SHA1
bb45e4ca7f8643c550d09a16ceb53de8ce0c41ba

SHA256
890ebdb6210812d47b2fec48240a8a0ae5551d7f92eead33c5572b5396ff9fdf

SHA512
f337a4198194ba1c4fb9c1fa2ab79936f9809525b7b75861d3eba8a06fa12c76d59b4e53ca11a0b740a4bff393b0cd662877fded8274fcc648924ebbf1f93f60

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/2492-45-0x0000000000FA0000-0x00000000010B0000-memory.dmp

Filesize
1.1MB

Download
memory/2656-42-0x0000000001DF0000-0x0000000001DF8000-memory.dmp

Filesize
32KB

Download
memory/2656-40-0x000000001B4D0000-0x000000001B7B2000-memory.dmp

Filesize
2.9MB

Download
memory/2864-13-0x00000000009D0000-0x0000000000AE0000-memory.dmp

Filesize
1.1MB

Download
memory/2864-17-0x00000000004F0000-0x00000000004FC000-memory.dmp

Filesize
48KB

Download
memory/2864-16-0x0000000000460000-0x000000000046C000-memory.dmp

Filesize
48KB

Download
memory/2864-15-0x0000000000450000-0x000000000045C000-memory.dmp

Filesize
48KB

Download
memory/2864-14-0x0000000000330000-0x0000000000342000-memory.dmp

Filesize
72KB

Download