dcrat | 56fa8446933d5de458500c110f2c70b6e072a3010fb7afe948c6955be6c2f5b2

Analysis

max time kernel
96s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
06/07/2024, 15:47

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General

Target
Nursultan Alpha.exe
Size 1.4MB
Sample240706-s77adstcnk
SHA256 56fa8446933d5de458500c110f2c70b6e072a3010fb7afe948c6955be6c2f5b2
MD5 783c0f752f2252cc44d0a276762806c2
SHA1 8dd27a9511420e0706c9154c905ed1a8554f87a1
SHA512 02307c263e5ccac880bb621a257fdf5836c4bbc4c86f5d0e787b7e8c0a1c79a98a21c820fbc30d310d0699f5175cfe96f2140fd6b6079b672547a3b1f33cdd41
SSDEEP 24576:U2G/nvxW3Ww0trc08LZO8GaXDYmdMiAKPfxPChiMHCVN+vmMUdj:UbA30rcfO8GaX5HxeiMHWMUh
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/0x000c000000023427-10.dat	dcrat
behavioral2/memory/1836-13-0x0000000000160000-0x0000000000278000-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-1-5-21-1015551233-1106003478-1645743776-1000\Control Panel\International\Geo\Nation	Nursultan Alpha.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1015551233-1106003478-1645743776-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
1836	ChainSaves.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-1-5-21-1015551233-1106003478-1645743776-1000_Classes\Local Settings	Nursultan Alpha.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1836	ChainSaves.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4452 wrote to memory of 4212	4452	Nursultan Alpha.exe	85
PID 4452 wrote to memory of 4212	4452	Nursultan Alpha.exe	85
PID 4452 wrote to memory of 4212	4452	Nursultan Alpha.exe	85
PID 4212 wrote to memory of 2476	4212	WScript.exe	86
PID 4212 wrote to memory of 2476	4212	WScript.exe	86
PID 4212 wrote to memory of 2476	4212	WScript.exe	86
PID 2476 wrote to memory of 1836	2476	cmd.exe	88
PID 2476 wrote to memory of 1836	2476	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\Nursultan Alpha.exe
"C:\Users\Admin\AppData\Local\Temp\Nursultan Alpha.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4452
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\browserrefCrtsvc\hIjatACLXzcR.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:4212
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\browserrefCrtsvc\nOzhVDOEIDz5E1.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2476
  - - C:\Users\Admin\AppData\Local\Temp\browserrefCrtsvc\ChainSaves.exe
      "C:\Users\Admin\AppData\Local\Temp\browserrefCrtsvc\ChainSaves.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:1836

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

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Downloads

ChainSaves.exe

Path C:\Users\Admin\AppData\Local\Temp\browserrefCrtsvc\ChainSaves.exe
Size 1.1MB
SHA256 5ee686ed0dbc44650e2bb2fd3f46f6e80a2a2ccd6e8da6d6b131df3f9ec7edbf
MD5 fa200a9f1cb23286759e8822c8ae278b
SHA1 239fa1801a69fc80b9e7091a800d13b32b0438b6
SHA512 47c73229fab41e0dd148d923f4dbac893dd36e109666bab806d94392f2c7bc84fcd3bded447f8ab9e075cf4c4a9dd5a94dcfb823f74ef87e0c1afa1d4ffe46e0
SSDEEP 24576:wc08LZO8GaXDYmdMiAKPfxPChiMHCVN+vmMUd:wcfO8GaX5HxeiMHWMU
MD5 SHA1 SHA512 SSDEEP

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hIjatACLXzcR.vbe

Path C:\Users\Admin\AppData\Local\Temp\browserrefCrtsvc\hIjatACLXzcR.vbe
Size 208B
SHA256 2ea5a33da82aacea2f408599e1bb5da950fb73e6d2ce01105c5513ee39b9fcb0
MD5 fc122668e2ffa5b27f7968d0cc3d07b7
SHA1 ea1993a57623763ac61382067c956bf2a66c87c1
SHA512 f755b7a45867195be99eff8b69e4ea3f2b85b51adbb02f0a1b99c860179184211f6a29c9bce7ab1b951d641ceb3b8be9efe862634af6d3da441e367a721ae46e
MD5 SHA1 SHA512

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nOzhVDOEIDz5E1.bat

Path C:\Users\Admin\AppData\Local\Temp\browserrefCrtsvc\nOzhVDOEIDz5E1.bat
Size 40B
SHA256 3b76b5aa6ef4298fcaea871bb9b88ed5f5ecd0cda2ada2b3090a80093f1cbec3
MD5 841307750510e536ecc5f7bcc2dc04c5
SHA1 23f78f1f5e21f8a9222245587ff1a0e7f49c1905
SHA512 7fed4e9330a13730941c396ebdda4190c92cda5709c4c525f9528490ba1d76a5fa34898effa7b160ecb8d954a168e2a31ced2f534510621eea4b65386968af6b
MD5 SHA1 SHA512

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memory/1836-12-0x00007FFB95783000-0x00007FFB95785000-memory.dmp

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memory/1836-13-0x0000000000160000-0x0000000000278000-memory.dmp

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memory/1836-14-0x0000000002380000-0x000000000238E000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads