dcrat | 40e2af7feff476ac43edae054634e294c55e966e7139d77d0bcd98d49a228aab

Analysis

max time kernel
142s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
17/12/2023, 06:38

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General

Target
001f751b0e56b26084d1ca8a939f638b.exe
Size 3.7MB
Sample231217-hd2spsdhfl
SHA256 40e2af7feff476ac43edae054634e294c55e966e7139d77d0bcd98d49a228aab
MD5 001f751b0e56b26084d1ca8a939f638b
SHA1 c57e7c0e9aad9cc1cdfbd546fa469840bb0ca55c
SHA512 91a8ca9280825859f61ab9827448d16e39fee1f0294b4168ce4eca138e725dc34964cc709a0248e20cf544f2c2167ce3be1519e2a7f46fe56a86e7485c92daf8
SSDEEP 98304:hbaFUGvxA4Yd9aKOK91xzRB186FEjWc72SzmZiq+:hvhZH7h86HQ24ew
MD5 SHA1 SHA512 SSDEEP

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

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x0006000000023207-15.dat	dcrat
behavioral2/memory/4232-17-0x00000000006F0000-0x0000000000A30000-memory.dmp	dcrat

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	001f751b0e56b26084d1ca8a939f638b.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
4232	comperf.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000_Classes\Local Settings	001f751b0e56b26084d1ca8a939f638b.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4232	comperf.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1128 wrote to memory of 520	1128	001f751b0e56b26084d1ca8a939f638b.exe	90
PID 1128 wrote to memory of 520	1128	001f751b0e56b26084d1ca8a939f638b.exe	90
PID 1128 wrote to memory of 520	1128	001f751b0e56b26084d1ca8a939f638b.exe	90
PID 1128 wrote to memory of 2720	1128	001f751b0e56b26084d1ca8a939f638b.exe	91
PID 1128 wrote to memory of 2720	1128	001f751b0e56b26084d1ca8a939f638b.exe	91
PID 1128 wrote to memory of 2720	1128	001f751b0e56b26084d1ca8a939f638b.exe	91
PID 520 wrote to memory of 1348	520	WScript.exe	98
PID 520 wrote to memory of 1348	520	WScript.exe	98
PID 520 wrote to memory of 1348	520	WScript.exe	98
PID 1348 wrote to memory of 4232	1348	cmd.exe	100
PID 1348 wrote to memory of 4232	1348	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\001f751b0e56b26084d1ca8a939f638b.exe
"C:\Users\Admin\AppData\Local\Temp\001f751b0e56b26084d1ca8a939f638b.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1128
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\chainBlockComponentRefsession\WzBnkadGzJBxYrkkXRX1Dm7JU30NG.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:520
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\chainBlockComponentRefsession\oA1oUiTt7RGPifOagJBmaCAuX9.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1348
  - - C:\chainBlockComponentRefsession\comperf.exe
      "C:\chainBlockComponentRefsession\comperf.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:4232
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\chainBlockComponentRefsession\file.vbs"
  2⤵
  PID:2720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

WzBnkadGzJBxYrkkXRX1Dm7JU30NG.vbe

Path C:\chainBlockComponentRefsession\WzBnkadGzJBxYrkkXRX1Dm7JU30NG.vbe
Size 233B
SHA256 f19a971ccbef8a77e7c0593e1f28f94ba235d9fd2b30bb732e5319a6f7774c4a
MD5 3e5a1199a1679753a21c332ec473971d
SHA1 40967f5fdbc83c2b2513c14665f865ffd1c20e86
SHA512 7b4520d3ad452104b856867fdd8d57baf0a14643af61378bbf00250bf56d7547da3d39e2667512a9e1d9dbdc874132dfa4df2e66c8f40db198f33f4822ed30ab
MD5 SHA1 SHA512

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comperf.exe

Path C:\chainBlockComponentRefsession\comperf.exe
Size 3.2MB
SHA256 956d6628ad790fe46470e3c60c463049761f04b14e59fe3fa552a106f453fc8b
MD5 20e643f8db33fd26cb54b72a25d773b5
SHA1 c2610d8361474cbae4a20cc5bc8934ac26559395
SHA512 6c794641999617006affdf771d4feea7ccb4430f97d62227762ae5dffeeb3e6e39a2718e91a723da1a5efee4203d64483080169984fff2a2e289159c4c9a2066
SSDEEP 98304:tFUGvxA4Yd9aKOK91xzRB186FEjWc72SzmZiq:MhZH7h86HQ24e
MD5 SHA1 SHA512 SSDEEP

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file.vbs

Path C:\chainBlockComponentRefsession\file.vbs
Size 34B
SHA256 f1cccb5ae4aa51d293bd3c7d2a1a04cb7847d22c5db8e05ac64e9a6d7455aa0b
MD5 677cc4360477c72cb0ce00406a949c61
SHA1 b679e8c3427f6c5fc47c8ac46cd0e56c9424de05
SHA512 7cfe2cc92f9e659f0a15a295624d611b3363bd01eb5bcf9bc7681ea9b70b0564d192d570d294657c8dc2c93497fa3b4526c975a9bf35d69617c31d9936573c6a
MD5 SHA1 SHA512

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oA1oUiTt7RGPifOagJBmaCAuX9.bat

Path C:\chainBlockComponentRefsession\oA1oUiTt7RGPifOagJBmaCAuX9.bat
Size 46B
SHA256 4be486072caec8e0697e5acebb334bf0c97c26b77a60ab6dc46b97b9d34ae255
MD5 72209f92ce4ee6e470c8abf3d4c97f91
SHA1 5930c3aa072a8a5c3d0b80fe80cf8a8785a9ecd3
SHA512 341a5ee3253f35798b70d26bfa3fc58bdbcd6634b98c6d42722673b50f9252e1f50a8cf91a0c41a4a0bd63cb44d9c9aa290b411ee921f74f24883e4e57d02e06
MD5 SHA1 SHA512

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memory/4232-17-0x00000000006F0000-0x0000000000A30000-memory.dmp

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memory/4232-18-0x00007FFA1BCE0000-0x00007FFA1C7A1000-memory.dmp

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memory/4232-19-0x000000001B770000-0x000000001B780000-memory.dmp

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memory/4232-20-0x0000000002B30000-0x0000000002B3E000-memory.dmp

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memory/4232-21-0x0000000002B40000-0x0000000002B4E000-memory.dmp

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memory/4232-23-0x00007FFA1BCE0000-0x00007FFA1C7A1000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads