dcrat | cf56915bbabca1ab11ae4cc7f946594e79aba3e4a79e89eb600c60bc19e4b357

Analysis

max time kernel
137s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
17/05/2024, 03:05

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General

Target
c0db54d6ec9c0e2310d4c8bfd1739f079a0fd85adcf088ff8876f54485a61f2c.exe
Size 1.4MB
Sample240517-dk835sef92
SHA256 c0db54d6ec9c0e2310d4c8bfd1739f079a0fd85adcf088ff8876f54485a61f2c
MD5 3d71f1e177234c396f2a5d7d852a2376
SHA1 fe960120b965c91a3021fbea60e1b2c77ec78b63
SHA512 e2bc7e6027b32088580ab4e2a074d23c8be77ef5992f502fadb0875316a2b2f79bd9d1668568d99867715d5e60ee2fa236c903ba668cfd868142e3d18bbda82c
SSDEEP 24576:U2G/nvxW3Ww0tHzmBv0vDGt3r6+yWJmgHgwSRADpDial:UbA30HzFGnJ2wS+1ic
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/0x0007000000023453-10.dat	dcrat
behavioral2/memory/2184-13-0x0000000000610000-0x0000000000734000-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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	c0db54d6ec9c0e2310d4c8bfd1739f079a0fd85adcf088ff8876f54485a61f2c.exe
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
2184	RAT.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-1-5-21-540404634-651139247-2967210625-1000_Classes\Local Settings	c0db54d6ec9c0e2310d4c8bfd1739f079a0fd85adcf088ff8876f54485a61f2c.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2184	RAT.exe
2184	RAT.exe
2184	RAT.exe
2184	RAT.exe
2184	RAT.exe
2184	RAT.exe
2184	RAT.exe
2184	RAT.exe
2184	RAT.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2184	RAT.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2184	RAT.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4352 wrote to memory of 3556	4352	c0db54d6ec9c0e2310d4c8bfd1739f079a0fd85adcf088ff8876f54485a61f2c.exe	85
PID 4352 wrote to memory of 3556	4352	c0db54d6ec9c0e2310d4c8bfd1739f079a0fd85adcf088ff8876f54485a61f2c.exe	85
PID 4352 wrote to memory of 3556	4352	c0db54d6ec9c0e2310d4c8bfd1739f079a0fd85adcf088ff8876f54485a61f2c.exe	85
PID 3556 wrote to memory of 3984	3556	WScript.exe	86
PID 3556 wrote to memory of 3984	3556	WScript.exe	86
PID 3556 wrote to memory of 3984	3556	WScript.exe	86
PID 3984 wrote to memory of 2184	3984	cmd.exe	88
PID 3984 wrote to memory of 2184	3984	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\c0db54d6ec9c0e2310d4c8bfd1739f079a0fd85adcf088ff8876f54485a61f2c.exe
"C:\Users\Admin\AppData\Local\Temp\c0db54d6ec9c0e2310d4c8bfd1739f079a0fd85adcf088ff8876f54485a61f2c.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4352
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\DCRAT\u3Ah4o8.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:3556
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\DCRAT\VmabnRVk3Q0Z4Rsmx4y.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3984
  - - C:\Users\Admin\AppData\Roaming\DCRAT\RAT.exe
      "C:\Users\Admin\AppData\Roaming\\DCRAT\RAT.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of AdjustPrivilegeToken
      PID:2184

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

RAT.exe

Path C:\Users\Admin\AppData\Roaming\DCRAT\RAT.exe
Size 1.1MB
SHA256 267c6d4e9f47e320bc83d14ae62a3b3942b5bc52271981a62634be7859d3e41a
MD5 4cf21cf4fe938861269eee0dce7ab40a
SHA1 8edccf6b4ce1a73419d25632d9707d1e473bfedc
SHA512 c5cdf840d65ab2e78480c1a172250696860a70953dade41463352d47f89183c40c15d0672c9268fea68711eb432ff5167189de0bac90fc83b81d563a808f2879
SSDEEP 12288:VGcqjGumBv0SNdif3QKRDGUwUPECbyrdgDWaw6+DJKAC4FQAfJ4H1fZ2EsFDUzkj:IzmBv0vDGt3r6+yWJmgHgwSRADpDia
MD5 SHA1 SHA512 SSDEEP

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VmabnRVk3Q0Z4Rsmx4y.bat

Path C:\Users\Admin\AppData\Roaming\DCRAT\VmabnRVk3Q0Z4Rsmx4y.bat
Size 26B
SHA256 298f4bc92dc502984c2b53207f096788fd77e095ca3f66a512a49ff2d8fd6b59
MD5 6938225aa9b06be749c03e2ed1d0a8a1
SHA1 9c18762161a7b0fb2ba460d649fa3797d6b048e3
SHA512 1be9139357b9ffe68a36bf4ba59141b9940ff5f54caa331bdcfe046f52a1f973542b54d2c383e9dea8ea01b4f3154d74d5c7a2af71910d9414ef79ff20d41327
MD5 SHA1 SHA512

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u3Ah4o8.vbe

Path C:\Users\Admin\AppData\Roaming\DCRAT\u3Ah4o8.vbe
Size 206B
SHA256 1be67ff6caccef7bc37346582d6ee3ffec585ce4a139c23a4d8fa1a2cad0836e
MD5 d25609d0ea00bd9b4034f6c115d73176
SHA1 9b4e9ce99da10017399de6ef8d9ac055f1f6fb5f
SHA512 c976d90d4b8f2d8aa7f8810e858acc13d51b2eb366fc1780145d24ded22fcb32c08bdb275db29d414cb217e4591fa821a42984149b1072660d28af2932348221
MD5 SHA1 SHA512

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memory/2184-12-0x00007FFA49B63000-0x00007FFA49B65000-memory.dmp

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memory/2184-13-0x0000000000610000-0x0000000000734000-memory.dmp

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memory/2184-14-0x0000000002840000-0x000000000285C000-memory.dmp

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memory/2184-16-0x0000000002880000-0x0000000002896000-memory.dmp

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memory/2184-15-0x0000000002A10000-0x0000000002A60000-memory.dmp

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memory/2184-17-0x00007FFA49B63000-0x00007FFA49B65000-memory.dmp

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