dcrat | 858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f

Analysis

max time kernel
150s
max time network
147s
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 21:33

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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

Processes:

resource	yara_rule
behavioral2/memory/3988-1-0x0000000000FF0000-0x000000000118C000-memory.dmp	family_dcrat_v2
behavioral2/files/0x0012000000023b92-36.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

Processes:

lfcdgbuksf.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	lfcdgbuksf.exe

Executes dropped EXE 1 IoCs

Processes:

staticfile.exe

pid	Process
4852	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

Processes:

lfcdgbuksf.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\Local Settings	lfcdgbuksf.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

lfcdgbuksf.exe

pid	Process
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe
3988	lfcdgbuksf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

lfcdgbuksf.exestaticfile.exe

description	pid	Process
Token: SeDebugPrivilege	3988	lfcdgbuksf.exe
Token: SeDebugPrivilege	4852	staticfile.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

staticfile.exe

pid	Process
4852	staticfile.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

lfcdgbuksf.execmd.exe

description	pid	Process	procid_target
PID 3988 wrote to memory of 2816	3988	lfcdgbuksf.exe	84
PID 3988 wrote to memory of 2816	3988	lfcdgbuksf.exe	84
PID 2816 wrote to memory of 3704	2816	cmd.exe	86
PID 2816 wrote to memory of 3704	2816	cmd.exe	86
PID 2816 wrote to memory of 4156	2816	cmd.exe	87
PID 2816 wrote to memory of 4156	2816	cmd.exe	87
PID 2816 wrote to memory of 4852	2816	cmd.exe	88
PID 2816 wrote to memory of 4852	2816	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:3988
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\EKWIzsz24d.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2816
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3704
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:4156
- - 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:4852

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\EKWIzsz24d.bat

Filesize
219B

MD5
1c358307dd2a922b2fe0e95c36a0bd91

SHA1
afefd37edbf40bb3cec1a4b7e58a2b792a4f83f6

SHA256
8403741c8b2d6f0a1617aa638b8aa47afec3764f69904120a4f14ce133221c93

SHA512
2aa13ded8f8379b792f0732810d5345ec022da31e1d38544dc49b269750439da47a48faaec7a27e51b8cfeb960b6d720003de4ed0a90f5b47c7ad485b9992230

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

Filesize
1.6MB

MD5
8c6e4c86c216b898f24ff14b417c4369

SHA1
266e7d01ba11cd7914451c798199596f4d2f7b53

SHA256
858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f

SHA512
3f6416bf0b7989b522d399e151cc755783b9b7afe9cde559f8207fad6c043e24f85b22c3a583329e1620e862c7824249c536209b6be5e093a2b580c2fc52f660

Download Submit
memory/3988-17-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/3988-5-0x00000000031E0000-0x00000000031FC000-memory.dmp

Filesize
112KB

Download
memory/3988-19-0x0000000003210000-0x000000000321E000-memory.dmp

Filesize
56KB

Download
memory/3988-6-0x000000001BDE0000-0x000000001BE30000-memory.dmp

Filesize
320KB

Download
memory/3988-8-0x0000000003340000-0x0000000003358000-memory.dmp

Filesize
96KB

Download
memory/3988-10-0x0000000003360000-0x0000000003376000-memory.dmp

Filesize
88KB

Download
memory/3988-12-0x000000001BE30000-0x000000001BE42000-memory.dmp

Filesize
72KB

Download
memory/3988-13-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/3988-21-0x000000001C070000-0x000000001C0BE000-memory.dmp

Filesize
312KB

Download
memory/3988-14-0x000000001C3A0000-0x000000001C8C8000-memory.dmp

Filesize
5.2MB

Download
memory/3988-0-0x00007FF80F383000-0x00007FF80F385000-memory.dmp

Filesize
8KB

Download
memory/3988-4-0x0000000003200000-0x000000000321C000-memory.dmp

Filesize
112KB

Download
memory/3988-16-0x000000001BF10000-0x000000001BF6A000-memory.dmp

Filesize
360KB

Download
memory/3988-22-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/3988-28-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/3988-29-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/3988-30-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/3988-33-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/3988-2-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/3988-1-0x0000000000FF0000-0x000000000118C000-memory.dmp

Filesize
1.6MB

Download
memory/4852-45-0x000000001BEC0000-0x000000001BFC2000-memory.dmp

Filesize
1.0MB

Download
memory/4852-46-0x000000001CC60000-0x000000001CD75000-memory.dmp

Filesize
1.1MB

Download