dcrat | 858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2024 21:36

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General

Target

lfcdgbuksf.exe
Size

1.6MB
MD5

8c6e4c86c216b898f24ff14b417c4369
SHA1

266e7d01ba11cd7914451c798199596f4d2f7b53
SHA256

858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f
SHA512

3f6416bf0b7989b522d399e151cc755783b9b7afe9cde559f8207fad6c043e24f85b22c3a583329e1620e862c7824249c536209b6be5e093a2b580c2fc52f660
SSDEEP

24576:o2a0H/WPj+rsO6AOhaDxL/aySUYj79FcPX6t1:va0SKsOP1L/KzEP

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
behavioral2/memory/4308-1-0x0000000000D40000-0x0000000000EDC000-memory.dmp	family_dcrat_v2
behavioral2/files/0x000f000000023c8e-40.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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	lfcdgbuksf.exe

Executes dropped EXE 1 IoCs

pid	Process
1608	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-1-5-21-1045960512-3948844814-3059691613-1000_Classes\Local Settings	lfcdgbuksf.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe
4308	lfcdgbuksf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4308	lfcdgbuksf.exe
Token: SeDebugPrivilege	1608	staticfile.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1608	staticfile.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4308 wrote to memory of 1416	4308	lfcdgbuksf.exe	83
PID 4308 wrote to memory of 1416	4308	lfcdgbuksf.exe	83
PID 1416 wrote to memory of 468	1416	cmd.exe	85
PID 1416 wrote to memory of 468	1416	cmd.exe	85
PID 1416 wrote to memory of 412	1416	cmd.exe	86
PID 1416 wrote to memory of 412	1416	cmd.exe	86
PID 1416 wrote to memory of 1608	1416	cmd.exe	88
PID 1416 wrote to memory of 1608	1416	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\lfcdgbuksf.exe
"C:\Users\Admin\AppData\Local\Temp\lfcdgbuksf.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4308
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ArAzJktLiV.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1416
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:468
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:412
- - C:\Users\Admin\AppData\Local\staticfile.exe
    "C:\Users\Admin\AppData\Local\staticfile.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:1608

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

Replay Monitor

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Downloads

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

Filesize
219B

MD5
bf5906432f09272a57cf0a06eafd80ea

SHA1
aa417cc9bc70b138e8450c5d1260bed785297aa8

SHA256
2374a190184ff4fcf8cc2158dabd5f9c7ce047c4cb3b4c39e54a220ff6d9120f

SHA512
44df0cb82014d54c486dde682d4032a076c372ffae340797da167ee1d88acef13bd89517c06ba8ecfb65a4d7ff855b2446494170b2ba82acabc99f99d370453b

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

Filesize
1.6MB

MD5
8c6e4c86c216b898f24ff14b417c4369

SHA1
266e7d01ba11cd7914451c798199596f4d2f7b53

SHA256
858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f

SHA512
3f6416bf0b7989b522d399e151cc755783b9b7afe9cde559f8207fad6c043e24f85b22c3a583329e1620e862c7824249c536209b6be5e093a2b580c2fc52f660

Download Submit
memory/1608-48-0x000000001D0B0000-0x000000001D17D000-memory.dmp

Filesize
820KB

Download
memory/4308-16-0x000000001C1A0000-0x000000001C6C8000-memory.dmp

Filesize
5.2MB

Download
memory/4308-19-0x000000001BC70000-0x000000001BCCA000-memory.dmp

Filesize
360KB

Download
memory/4308-6-0x0000000003120000-0x0000000003170000-memory.dmp

Filesize
320KB

Download
memory/4308-7-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-9-0x0000000001730000-0x0000000001748000-memory.dmp

Filesize
96KB

Download
memory/4308-11-0x0000000001750000-0x0000000001766000-memory.dmp

Filesize
88KB

Download
memory/4308-12-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-14-0x0000000003290000-0x00000000032A2000-memory.dmp

Filesize
72KB

Download
memory/4308-15-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-0-0x00007FFA102C3000-0x00007FFA102C5000-memory.dmp

Filesize
8KB

Download
memory/4308-17-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-5-0x00000000016F0000-0x000000000170C000-memory.dmp

Filesize
112KB

Download
memory/4308-20-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-22-0x0000000001720000-0x000000000172E000-memory.dmp

Filesize
56KB

Download
memory/4308-24-0x000000001BDD0000-0x000000001BE1E000-memory.dmp

Filesize
312KB

Download
memory/4308-25-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-28-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-32-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-37-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-4-0x00000000016A0000-0x00000000016BC000-memory.dmp

Filesize
112KB

Download
memory/4308-35-0x000000001C7D0000-0x000000001C89D000-memory.dmp

Filesize
820KB

Download
memory/4308-2-0x00007FFA102C0000-0x00007FFA10D81000-memory.dmp

Filesize
10.8MB

Download
memory/4308-1-0x0000000000D40000-0x0000000000EDC000-memory.dmp

Filesize
1.6MB

Download