dcrat | 0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

Analysis

max time kernel
148s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
04-12-2024 15:48

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General

Target

mrdgasdthawed.exe
Size

560KB
MD5

37cb065f052d8cf6a46d41d6225b9a9f
SHA1

ffcd01452c4b695f1371787a5c728c692283fca2
SHA256

0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01
SHA512

8a2850f61af22a40ebb1e11c1d294cd74c94cf3b365619a4588bfbc54362575467cff4a5d75f685354b073453ad9892125739e78468a8dc550e52ccab88df47e
SSDEEP

6144:s/9Sb1sKhV/+NZCwUW/mulaEqLhEWRzSyAZW9z9mXbj7Gvvai33Ew8X6Asz6UrZ:sFK1DH/p8l/zWRdP5mfA33EjKf6UrZ

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 family
dcrat

DCRat payload 2 IoCs

rat

resource	yara_rule
behavioral3/memory/3468-1-0x00000000000D0000-0x0000000000162000-memory.dmp	family_dcrat_v2
behavioral3/files/0x001c00000002aa6f-16.dat	family_dcrat_v2

Executes dropped EXE 1 IoCs

pid	Process
5036	staticfile.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-1-5-21-2499603254-3415597248-1508446358-1000_Classes\Local Settings	mrdgasdthawed.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
5036	staticfile.exe
5036	staticfile.exe
5036	staticfile.exe
5036	staticfile.exe
5036	staticfile.exe
5036	staticfile.exe
5036	staticfile.exe
5036	staticfile.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3468	mrdgasdthawed.exe
Token: SeDebugPrivilege	5036	staticfile.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3468 wrote to memory of 3832	3468	mrdgasdthawed.exe	77
PID 3468 wrote to memory of 3832	3468	mrdgasdthawed.exe	77
PID 3832 wrote to memory of 3684	3832	cmd.exe	79
PID 3832 wrote to memory of 3684	3832	cmd.exe	79
PID 3832 wrote to memory of 484	3832	cmd.exe	80
PID 3832 wrote to memory of 484	3832	cmd.exe	80
PID 3832 wrote to memory of 5036	3832	cmd.exe	81
PID 3832 wrote to memory of 5036	3832	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\mrdgasdthawed.exe
"C:\Users\Admin\AppData\Local\Temp\mrdgasdthawed.exe"
1⤵
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3468
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\AvUVfFW8zK.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3832
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3684
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:484
- - C:\Users\Admin\AppData\Local\staticfile.exe
    "C:\Users\Admin\AppData\Local\staticfile.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5036

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\AvUVfFW8zK.bat

Filesize
219B

MD5
d3ab35be4e1820f05ee22f3e9bf58fbd

SHA1
bdddf07f8d24fd7a6840c9684ee9c2e5efb23ba5

SHA256
0cdfc50bf11c3ed5a8ea08accf7d1f3714403ea111f2d0c3230ce8eb2f3c36eb

SHA512
4963a90cfde2cbdaacbce1102b4c9828b630b89981b8d46da37f47edc36f34394a9a41d90940b1418164c3f84fa5040d3fd9f4774be10fca88fb8e8c5e591d3f

Download Submit
C:\Users\Admin\AppData\Local\staticfile.exe

Filesize
560KB

MD5
37cb065f052d8cf6a46d41d6225b9a9f

SHA1
ffcd01452c4b695f1371787a5c728c692283fca2

SHA256
0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

SHA512
8a2850f61af22a40ebb1e11c1d294cd74c94cf3b365619a4588bfbc54362575467cff4a5d75f685354b073453ad9892125739e78468a8dc550e52ccab88df47e

Download Submit
memory/3468-0-0x00007FF8E3FC3000-0x00007FF8E3FC5000-memory.dmp

Filesize
8KB

Download
memory/3468-1-0x00000000000D0000-0x0000000000162000-memory.dmp

Filesize
584KB

Download
memory/3468-2-0x0000000002230000-0x000000000223E000-memory.dmp

Filesize
56KB

Download
memory/3468-3-0x0000000002240000-0x000000000224C000-memory.dmp

Filesize
48KB

Download
memory/3468-4-0x00007FF8E3FC0000-0x00007FF8E4A82000-memory.dmp

Filesize
10.8MB

Download
memory/3468-13-0x00007FF8E3FC0000-0x00007FF8E4A82000-memory.dmp

Filesize
10.8MB

Download
memory/5036-17-0x00007FF8E3FC0000-0x00007FF8E4A82000-memory.dmp

Filesize
10.8MB

Download
memory/5036-18-0x00007FF8E3FC0000-0x00007FF8E4A82000-memory.dmp

Filesize
10.8MB

Download