dcrat | 7007ad2f99a1da6616401648bcd0bdb00161c20d5dc2c27390214b028d9ddf84

General

Target

Crack Cheat.exe
Size

3.3MB
MD5

188bfbff71841426601213f21a79857f
SHA1

aae3deda1b9b4ff703b7fa311ee10117b3a7b546
SHA256

7007ad2f99a1da6616401648bcd0bdb00161c20d5dc2c27390214b028d9ddf84
SHA512

f3495dfb14068d659824506a3278810a1dde60523218add2e530768e65473c2573263ce28c3560c5723158054051223c94ded5c00cf6389711ed02a47bb753b3
SSDEEP

49152:ubA3jB65wSIehCuRt1MJh9JsZCG6eRCbKjHUMGb7JzA6LI0HM6HqyYu/K:ubr/jk9JlGr4Kj0MOm6kgkui

Score

10^/10

dcrat discovery evasion 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

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x001900000002ab1c-15.dat	dcrat
behavioral2/memory/4272-17-0x0000000000440000-0x0000000000754000-memory.dmp	dcrat

Disables Task Manager via registry modification
evasion

Executes dropped EXE 1 IoCs

pid	Process
4272	browserHost.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 5 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	Crack Cheat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4248760313-3670024077-2384670640-1000_Classes\Local Settings	Crack Cheat.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4780	reg.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4272	browserHost.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 956 wrote to memory of 2816	956	Crack Cheat.exe	79
PID 956 wrote to memory of 2816	956	Crack Cheat.exe	79
PID 956 wrote to memory of 2816	956	Crack Cheat.exe	79
PID 956 wrote to memory of 3280	956	Crack Cheat.exe	80
PID 956 wrote to memory of 3280	956	Crack Cheat.exe	80
PID 956 wrote to memory of 3280	956	Crack Cheat.exe	80
PID 2816 wrote to memory of 1192	2816	WScript.exe	81
PID 2816 wrote to memory of 1192	2816	WScript.exe	81
PID 2816 wrote to memory of 1192	2816	WScript.exe	81
PID 1192 wrote to memory of 4272	1192	cmd.exe	83
PID 1192 wrote to memory of 4272	1192	cmd.exe	83
PID 1192 wrote to memory of 4780	1192	cmd.exe	86
PID 1192 wrote to memory of 4780	1192	cmd.exe	86
PID 1192 wrote to memory of 4780	1192	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\Crack Cheat.exe
"C:\Users\Admin\AppData\Local\Temp\Crack Cheat.exe"
1⤵
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:956
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\hostperfmonitornetCommon\sVfMeP.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2816
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\hostperfmonitornetCommon\EoILAIW.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1192
  - - C:\hostperfmonitornetCommon\browserHost.exe
      "C:\hostperfmonitornetCommon\browserHost.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:4272
  - - C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
      4⤵
      System Location Discovery: System Language Discovery
      Modifies registry key
      PID:4780
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\hostperfmonitornetCommon\file.vbs"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3280

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\hostperfmonitornetCommon\EoILAIW.bat

Filesize
157B

MD5
d436eca1a75d336316136483b7fd4cc8

SHA1
efca2f7efac382bb438b66cad807cb01f65afbfe

SHA256
20d4b15f59b1d9a528d1f7987ecee9763843f4492a27c79aaf8039ee703eecc2

SHA512
cb5039e9ea28a3f4009160b582997c976f91d021941d7b32f61ef750d5f301d230611e6a7adddaeced01e54cae65d906938ae20d670f3e20c07fbf5f8f9c8475

Download Submit
C:\hostperfmonitornetCommon\browserHost.exe

Filesize
3.0MB

MD5
bdabb232abcfd496e2db81b4d28f0da2

SHA1
64173661bb3c959858583da283628bb3352e5f03

SHA256
8750b610638b8de125dadfb8f45512a41c44f9a960cfab3e06d5cf56fbbb1972

SHA512
d68bc6e52ebbb7feae060612a4b07b53910105e122ec21deb7f8375de67e93f6a9ecded6bc1783611b7e576b1ba4b320bb78a21e06b6947e1b693a2142fcb0f1

Download Submit
C:\hostperfmonitornetCommon\file.vbs

Filesize
34B

MD5
677cc4360477c72cb0ce00406a949c61

SHA1
b679e8c3427f6c5fc47c8ac46cd0e56c9424de05

SHA256
f1cccb5ae4aa51d293bd3c7d2a1a04cb7847d22c5db8e05ac64e9a6d7455aa0b

SHA512
7cfe2cc92f9e659f0a15a295624d611b3363bd01eb5bcf9bc7681ea9b70b0564d192d570d294657c8dc2c93497fa3b4526c975a9bf35d69617c31d9936573c6a

Download Submit
C:\hostperfmonitornetCommon\sVfMeP.vbe

Filesize
205B

MD5
be0e14acc0f8b2e43e11fd0801e489a3

SHA1
afdb9e4157050fa1dac114ffde701667f987d5db

SHA256
8c6d6f195cf1488151028a9a63ebc0890ddff4c363567a26b7e8fcc76f8e7553

SHA512
0d00fc006602e1386a8a3888f841f9fd78d96906002d16c9f85dc1920efffd53f537b8e13893466793b13f6d05f8f9966716e185392326831d1977e13307a3fe

Download Submit
memory/4272-17-0x0000000000440000-0x0000000000754000-memory.dmp

Filesize
3.1MB

Download
memory/4272-18-0x0000000002890000-0x000000000289E000-memory.dmp

Filesize
56KB

Download
memory/4272-19-0x00000000028A0000-0x00000000028AE000-memory.dmp

Filesize
56KB

Download

Analysis

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