dcrat | 1e1a63dc013e9571d1430993d08eb080e5f97339e107efcfdb39bae9aef8ce54

Analysis

max time kernel
137s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
25/11/2023, 02:03

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General

Target
552fc1ab56ac48bebff7d6ddb8555045.exe
Size 1.7MB
Sample231125-cgpdwsfg92
SHA256 1e1a63dc013e9571d1430993d08eb080e5f97339e107efcfdb39bae9aef8ce54
MD5 552fc1ab56ac48bebff7d6ddb8555045
SHA1 a3d47484a165a3c2d0684ac495e3d8e80e81d26f
SHA512 ad2f70733e5f569e9904847139e36987615a6b7e2369ff090ee0d52d7933e6963637391a143f0174c2c66ec051cbb3639f69889b0934a5e6a674dd5a4dab71e0
SSDEEP 24576:u2G/nvxW3WieChpnoW7Y2eypAqUVZNNPnMVbhYsPfczm6BBpWgxKIC45SPX/UA:ubA3jhpTIIGnMV9f94foIC+Sft
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 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x0009000000022bec-10.dat	dcrat
behavioral2/files/0x0009000000022bec-11.dat	dcrat
behavioral2/memory/3140-12-0x0000000000100000-0x0000000000262000-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-1-5-21-3125601242-331447593-1512828465-1000\Control Panel\International\Geo\Nation	552fc1ab56ac48bebff7d6ddb8555045.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3125601242-331447593-1512828465-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3140	reviewdhcp.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-1-5-21-3125601242-331447593-1512828465-1000_Classes\Local Settings	552fc1ab56ac48bebff7d6ddb8555045.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3140	reviewdhcp.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1904 wrote to memory of 3968	1904	552fc1ab56ac48bebff7d6ddb8555045.exe	87
PID 1904 wrote to memory of 3968	1904	552fc1ab56ac48bebff7d6ddb8555045.exe	87
PID 1904 wrote to memory of 3968	1904	552fc1ab56ac48bebff7d6ddb8555045.exe	87
PID 3968 wrote to memory of 2452	3968	WScript.exe	92
PID 3968 wrote to memory of 2452	3968	WScript.exe	92
PID 3968 wrote to memory of 2452	3968	WScript.exe	92
PID 2452 wrote to memory of 3140	2452	cmd.exe	94
PID 2452 wrote to memory of 3140	2452	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\552fc1ab56ac48bebff7d6ddb8555045.exe
"C:\Users\Admin\AppData\Local\Temp\552fc1ab56ac48bebff7d6ddb8555045.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\windriverPerfDll\4ddwiPU.vbe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:3968
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\windriverPerfDll\nhfguPjSEr5LbJ7IT8hOZ.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2452
  - - C:\windriverPerfDll\reviewdhcp.exe
      "C:\windriverPerfDll\reviewdhcp.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:3140

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

4ddwiPU.vbe

Path C:\windriverPerfDll\4ddwiPU.vbe
Size 214B
SHA256 116e638bc0eafb000be4c801dde0e67a482d3c1efcd1fc75bebaafb3963edd2d
MD5 e41a49af50c689042f5169ca831f0be0
SHA1 b4e90edd8ac37bbe9a222c755d2eb8b637f21a7f
SHA512 eaa14f770ff2539169138a5d5b5b648baa297bdb847a5273baf38cd27b06d5e8762186dfb4db2aa487a5582b04c2f8b1d4b92cfe4e675cf4e7d1c67bee3a35fd
MD5 SHA1 SHA512

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nhfguPjSEr5LbJ7IT8hOZ.bat

Path C:\windriverPerfDll\nhfguPjSEr5LbJ7IT8hOZ.bat
Size 36B
SHA256 80c683483072a77a1b48364ac0e83eb8ca2d5fbf152c3edd466cace1a5b4a038
MD5 c167588af4f5c090b08d8643c1d09d9b
SHA1 417169a34b3faf89803c2b5d393b19e761cbdcee
SHA512 5a262ebd528b4299d2d68ce5f2506618a1bacf2ab6d8c24dd86bde4d0b0e5c840b103989c94c3bac6dfbb69b50bf0b833cf70ec8f2a537356d53ce09a82257cd
MD5 SHA1 SHA512

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reviewdhcp.exe

Path C:\windriverPerfDll\reviewdhcp.exe
Size 1.4MB
SHA256 c161a446ccfa6b56705a8bc1afb0846ddc1f3c895c2065385588308a7e0cac64
MD5 4d5af888f2c633e3f7f88f018cf8e257
SHA1 72242859e6b3d182b6aeb1ad9b3e02e6dec42840
SHA512 104d7d4bf9b2ae34d09fd1a83908d8c2c0f670a05ca39557f25557b0954ff30f34daa5c121ff5184b9455a6e7a4406be287dfb3d145421c8b0ee1492670bce56
SSDEEP 24576:5pnoW7Y2eypAqUVZNNPnMVbhYsPfczm6BBpWgxKIC45SPX/U:5pTIIGnMV9f94foIC+Sf
MD5 SHA1 SHA512 SSDEEP

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reviewdhcp.exe

Path C:\windriverPerfDll\reviewdhcp.exe
Size 1.4MB
SHA256 c161a446ccfa6b56705a8bc1afb0846ddc1f3c895c2065385588308a7e0cac64
MD5 4d5af888f2c633e3f7f88f018cf8e257
SHA1 72242859e6b3d182b6aeb1ad9b3e02e6dec42840
SHA512 104d7d4bf9b2ae34d09fd1a83908d8c2c0f670a05ca39557f25557b0954ff30f34daa5c121ff5184b9455a6e7a4406be287dfb3d145421c8b0ee1492670bce56
SSDEEP 24576:5pnoW7Y2eypAqUVZNNPnMVbhYsPfczm6BBpWgxKIC45SPX/U:5pTIIGnMV9f94foIC+Sf
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/3140-12-0x0000000000100000-0x0000000000262000-memory.dmp

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memory/3140-13-0x00007FFFA9EE0000-0x00007FFFAA9A1000-memory.dmp

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memory/3140-14-0x0000000002420000-0x0000000002430000-memory.dmp

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memory/3140-15-0x0000000002450000-0x000000000245E000-memory.dmp

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memory/3140-17-0x00007FFFA9EE0000-0x00007FFFAA9A1000-memory.dmp

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Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads