dcrat | 858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f

Analysis

max time kernel
143s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30-11-2024 21:36

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/2388-1-0x0000000000CB0000-0x0000000000E4C000-memory.dmp	family_dcrat_v2
behavioral1/files/0x0011000000012033-32.dat	family_dcrat_v2
behavioral1/memory/2744-34-0x0000000000070000-0x000000000020C000-memory.dmp	family_dcrat_v2

Executes dropped EXE 1 IoCs

Processes:

staticfile.exe

pid	Process
2744	staticfile.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

lfcdgbuksf.exe

pid	Process
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe
2388	lfcdgbuksf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

lfcdgbuksf.exestaticfile.exe

description	pid	Process
Token: SeDebugPrivilege	2388	lfcdgbuksf.exe
Token: SeDebugPrivilege	2744	staticfile.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

staticfile.exe

pid	Process
2744	staticfile.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

lfcdgbuksf.execmd.exe

description	pid	Process	procid_target
PID 2388 wrote to memory of 2880	2388	lfcdgbuksf.exe	30
PID 2388 wrote to memory of 2880	2388	lfcdgbuksf.exe	30
PID 2388 wrote to memory of 2880	2388	lfcdgbuksf.exe	30
PID 2880 wrote to memory of 2696	2880	cmd.exe	32
PID 2880 wrote to memory of 2696	2880	cmd.exe	32
PID 2880 wrote to memory of 2696	2880	cmd.exe	32
PID 2880 wrote to memory of 2720	2880	cmd.exe	33
PID 2880 wrote to memory of 2720	2880	cmd.exe	33
PID 2880 wrote to memory of 2720	2880	cmd.exe	33
PID 2880 wrote to memory of 2744	2880	cmd.exe	34
PID 2880 wrote to memory of 2744	2880	cmd.exe	34
PID 2880 wrote to memory of 2744	2880	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\lfcdgbuksf.exe
"C:\Users\Admin\AppData\Local\Temp\lfcdgbuksf.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\fNkLWIMq3J.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2880
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2696
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2720
- - 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:2744

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\fNkLWIMq3J.bat

Filesize
219B

MD5
0cd0e3f4eff972052d7cdac394b2b2c7

SHA1
aa3aa7985dd4903d6d212733369e6d24f9f8c7b7

SHA256
5832f6f65bddeca83752c977142f43bff96400d8cc8a4332f29115156c03c655

SHA512
7b579073ab46e2585a0d404e6e8cf12482ed8f69460075b523fcbcf181c29e80322a6cc0c827bbb71e735912a2b7e3707f5f17d132361723f5dcbcee62d54da4

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

Filesize
1.6MB

MD5
8c6e4c86c216b898f24ff14b417c4369

SHA1
266e7d01ba11cd7914451c798199596f4d2f7b53

SHA256
858fff104da670b640eff2a93b7fa4b794ae554c30a409864d00f3b7ecc1e09f

SHA512
3f6416bf0b7989b522d399e151cc755783b9b7afe9cde559f8207fad6c043e24f85b22c3a583329e1620e862c7824249c536209b6be5e093a2b580c2fc52f660

Download Submit
memory/2388-15-0x0000000002360000-0x00000000023BA000-memory.dmp

Filesize
360KB

Download
memory/2388-16-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-5-0x0000000000470000-0x000000000048C000-memory.dmp

Filesize
112KB

Download
memory/2388-7-0x00000000005D0000-0x00000000005E8000-memory.dmp

Filesize
96KB

Download
memory/2388-9-0x00000000005F0000-0x0000000000606000-memory.dmp

Filesize
88KB

Download
memory/2388-10-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-12-0x00000000006A0000-0x00000000006B2000-memory.dmp

Filesize
72KB

Download
memory/2388-13-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-0-0x000007FEF5573000-0x000007FEF5574000-memory.dmp

Filesize
4KB

Download
memory/2388-4-0x0000000000490000-0x00000000004AC000-memory.dmp

Filesize
112KB

Download
memory/2388-18-0x0000000000490000-0x000000000049E000-memory.dmp

Filesize
56KB

Download
memory/2388-21-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-20-0x00000000023C0000-0x000000000240E000-memory.dmp

Filesize
312KB

Download
memory/2388-29-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-27-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-2-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-31-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-1-0x0000000000CB0000-0x0000000000E4C000-memory.dmp

Filesize
1.6MB

Download
memory/2744-34-0x0000000000070000-0x000000000020C000-memory.dmp

Filesize
1.6MB

Download