dcrat | 0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01 | Triage

Analysis

max time kernel
140s
max time network
151s
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 15:47

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General

Target

fhjsfryjaspyjga.exe
Size

560KB
MD5

37cb065f052d8cf6a46d41d6225b9a9f
SHA1

ffcd01452c4b695f1371787a5c728c692283fca2
SHA256

0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01
SHA512

8a2850f61af22a40ebb1e11c1d294cd74c94cf3b365619a4588bfbc54362575467cff4a5d75f685354b073453ad9892125739e78468a8dc550e52ccab88df47e
SSDEEP

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

Score

10^/10

dcrat discovery 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

resource	yara_rule
behavioral3/memory/5000-1-0x00000000002E0000-0x0000000000372000-memory.dmp	family_dcrat_v2
behavioral3/files/0x0009000000029d3e-15.dat	family_dcrat_v2

Executes dropped EXE 1 IoCs

pid	Process
4404	staticfile.exe

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

Internet Connection Discovery

pid	Process
652	PING.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1537126222-899333903-2037027349-1000_Classes\Local Settings	fhjsfryjaspyjga.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
652	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4404	staticfile.exe
4404	staticfile.exe
4404	staticfile.exe
4404	staticfile.exe
4404	staticfile.exe
4404	staticfile.exe
4404	staticfile.exe
4404	staticfile.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4404	staticfile.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5000	fhjsfryjaspyjga.exe
Token: SeDebugPrivilege	4404	staticfile.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5000 wrote to memory of 1208	5000	fhjsfryjaspyjga.exe	77
PID 5000 wrote to memory of 1208	5000	fhjsfryjaspyjga.exe	77
PID 1208 wrote to memory of 3440	1208	cmd.exe	79
PID 1208 wrote to memory of 3440	1208	cmd.exe	79
PID 1208 wrote to memory of 652	1208	cmd.exe	80
PID 1208 wrote to memory of 652	1208	cmd.exe	80
PID 1208 wrote to memory of 4404	1208	cmd.exe	81
PID 1208 wrote to memory of 4404	1208	cmd.exe	81

C:\Users\Admin\AppData\Local\Temp\fhjsfryjaspyjga.exe
"C:\Users\Admin\AppData\Local\Temp\fhjsfryjaspyjga.exe"
1⤵
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5000
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\OP07d0ER5o.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1208
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3440
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:652
- - C:\Users\Admin\AppData\Local\staticfile.exe
    "C:\Users\Admin\AppData\Local\staticfile.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:4404

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

System Information Discovery

System Network Configuration Discovery

Internet Connection Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\OP07d0ER5o.bat

Filesize
171B

MD5
8a16ed4184fe70f8fc5fcf8df66d3368

SHA1
492d6aad66c686e78e73d28cb1a51d80438add9a

SHA256
2b2bed4829dddc1cfa36370f19e5052b0298675c4868d075402e711c458b9d08

SHA512
5240dd709faa728a86faa13ad6ab6771213c22f998cf8d63af11c722bf468684f3cbe2cb7893782d6b0362a6b0f49975029db93f0f3275daa5cc72246a5548fe

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

Filesize
560KB

MD5
37cb065f052d8cf6a46d41d6225b9a9f

SHA1
ffcd01452c4b695f1371787a5c728c692283fca2

SHA256
0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

SHA512
8a2850f61af22a40ebb1e11c1d294cd74c94cf3b365619a4588bfbc54362575467cff4a5d75f685354b073453ad9892125739e78468a8dc550e52ccab88df47e

Download Submit
memory/4404-19-0x000000001B6D0000-0x000000001B6D9000-memory.dmp

Filesize
36KB

Download
memory/4404-23-0x00007FFAE7830000-0x00007FFAE82F2000-memory.dmp

Filesize
10.8MB

Download
memory/4404-21-0x000000001C880000-0x000000001C89E000-memory.dmp

Filesize
120KB

Download
memory/4404-22-0x000000001C8A0000-0x000000001C8AB000-memory.dmp

Filesize
44KB

Download
memory/4404-20-0x000000001C460000-0x000000001C46D000-memory.dmp

Filesize
52KB

Download
memory/4404-18-0x000000001B680000-0x000000001B6C6000-memory.dmp

Filesize
280KB

Download
memory/4404-17-0x00007FFAE7830000-0x00007FFAE82F2000-memory.dmp

Filesize
10.8MB

Download
memory/5000-3-0x0000000000A90000-0x0000000000A9C000-memory.dmp

Filesize
48KB

Download
memory/5000-13-0x00007FFAE7830000-0x00007FFAE82F2000-memory.dmp

Filesize
10.8MB

Download
memory/5000-9-0x00007FFAE7830000-0x00007FFAE82F2000-memory.dmp

Filesize
10.8MB

Download
memory/5000-0-0x00007FFAE7833000-0x00007FFAE7835000-memory.dmp

Filesize
8KB

Download
memory/5000-2-0x0000000000A80000-0x0000000000A8E000-memory.dmp

Filesize
56KB

Download
memory/5000-1-0x00000000002E0000-0x0000000000372000-memory.dmp

Filesize
584KB

Download