dcrat | 0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

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

rat

resource	yara_rule
behavioral2/memory/4456-1-0x00000000008F0000-0x0000000000982000-memory.dmp	family_dcrat_v2
behavioral2/files/0x000c000000023b77-15.dat	family_dcrat_v2

Checks computer location settings 2 TTPs 1 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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	fhjsfryjaspyjga.exe

Executes dropped EXE 1 IoCs

pid	Process
5112	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.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4300	PING.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000_Classes\Local Settings	fhjsfryjaspyjga.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4300	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
5112	staticfile.exe
5112	staticfile.exe
5112	staticfile.exe
5112	staticfile.exe
5112	staticfile.exe
5112	staticfile.exe
5112	staticfile.exe
5112	staticfile.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4456	fhjsfryjaspyjga.exe
Token: SeDebugPrivilege	5112	staticfile.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4456 wrote to memory of 4180	4456	fhjsfryjaspyjga.exe	82
PID 4456 wrote to memory of 4180	4456	fhjsfryjaspyjga.exe	82
PID 4180 wrote to memory of 1004	4180	cmd.exe	84
PID 4180 wrote to memory of 1004	4180	cmd.exe	84
PID 4180 wrote to memory of 4300	4180	cmd.exe	85
PID 4180 wrote to memory of 4300	4180	cmd.exe	85
PID 4180 wrote to memory of 5112	4180	cmd.exe	86
PID 4180 wrote to memory of 5112	4180	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\fhjsfryjaspyjga.exe
"C:\Users\Admin\AppData\Local\Temp\fhjsfryjaspyjga.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4456
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\MVVwe1ISHk.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4180
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1004
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4300
- - 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:5112

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\MVVwe1ISHk.bat

Filesize
171B

MD5
9685510a7f469f0190bf80a67f594ffa

SHA1
5005aff6bfcfd6fbc407e44cd825a48975330c96

SHA256
233cc39185c721dfcbe0b7f04cf8f40f508076bfca24b2db7daa84beb0f228f4

SHA512
c752d3ee8f79a5dc8d9cb56db343cb1367b22ec444276109030953266f3ea54eb1bcc7330f2e1b6f51b854310a215158897e26352bff4a0eadec4facac44d8ac

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

Filesize
560KB

MD5
37cb065f052d8cf6a46d41d6225b9a9f

SHA1
ffcd01452c4b695f1371787a5c728c692283fca2

SHA256
0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

SHA512
8a2850f61af22a40ebb1e11c1d294cd74c94cf3b365619a4588bfbc54362575467cff4a5d75f685354b073453ad9892125739e78468a8dc550e52ccab88df47e

Download Submit
memory/4456-0-0x00007FF993183000-0x00007FF993185000-memory.dmp

Filesize
8KB

Download
memory/4456-1-0x00000000008F0000-0x0000000000982000-memory.dmp

Filesize
584KB

Download
memory/4456-2-0x00000000029E0000-0x00000000029EE000-memory.dmp

Filesize
56KB

Download
memory/4456-3-0x00000000029F0000-0x00000000029FC000-memory.dmp

Filesize
48KB

Download
memory/4456-4-0x00007FF993180000-0x00007FF993C41000-memory.dmp

Filesize
10.8MB

Download
memory/4456-13-0x00007FF993180000-0x00007FF993C41000-memory.dmp

Filesize
10.8MB

Download
memory/5112-17-0x00007FF992E50000-0x00007FF993911000-memory.dmp

Filesize
10.8MB

Download
memory/5112-18-0x00007FF992E50000-0x00007FF993911000-memory.dmp

Filesize
10.8MB

Download
memory/5112-19-0x00007FF992E50000-0x00007FF993911000-memory.dmp

Filesize
10.8MB

Download
memory/5112-20-0x00007FF992E50000-0x00007FF993911000-memory.dmp

Filesize
10.8MB

Download

Analysis

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