dcrat | 0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01 | Triage

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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
behavioral2/memory/5088-1-0x00000000008B0000-0x0000000000942000-memory.dmp	family_dcrat_v2
behavioral2/files/0x000c000000023b42-15.dat	family_dcrat_v2

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	fhjsfryjaspyjga.exe

Executes dropped EXE 1 IoCs

pid	Process
2556	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
2216	PING.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	fhjsfryjaspyjga.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

pid	Process
2216	PING.EXE

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2556	staticfile.exe
2556	staticfile.exe
2556	staticfile.exe
2556	staticfile.exe
2556	staticfile.exe
2556	staticfile.exe
2556	staticfile.exe
2556	staticfile.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5088	fhjsfryjaspyjga.exe
Token: SeDebugPrivilege	2556	staticfile.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5088 wrote to memory of 3128	5088	fhjsfryjaspyjga.exe	84
PID 5088 wrote to memory of 3128	5088	fhjsfryjaspyjga.exe	84
PID 3128 wrote to memory of 4964	3128	cmd.exe	86
PID 3128 wrote to memory of 4964	3128	cmd.exe	86
PID 3128 wrote to memory of 2216	3128	cmd.exe	87
PID 3128 wrote to memory of 2216	3128	cmd.exe	87
PID 3128 wrote to memory of 2556	3128	cmd.exe	95
PID 3128 wrote to memory of 2556	3128	cmd.exe	95

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:5088
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\hIMCA3Kf5V.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3128
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4964
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2216
- - 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:2556

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

Remote System Discovery

System Information Discovery

System Network Configuration Discovery

Internet Connection Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\hIMCA3Kf5V.bat

Filesize
171B

MD5
8ea31d713face86c604cf446235d075b

SHA1
ffc27acada0b879477c15bc9554cebfd447eba94

SHA256
13b866dae7ba33c23090ab3c6116fcf1a64f83816fc773198209f769a3b4e99f

SHA512
177739af6445edc8b7b089db198915b2bfff5543ae55848d54a1220c5ee7b0dfabc0ed0dbd6900286f5c34db6e8ead79cee28d9a46d2afadf6575964b1a31e58

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

Filesize
560KB

MD5
37cb065f052d8cf6a46d41d6225b9a9f

SHA1
ffcd01452c4b695f1371787a5c728c692283fca2

SHA256
0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

SHA512
8a2850f61af22a40ebb1e11c1d294cd74c94cf3b365619a4588bfbc54362575467cff4a5d75f685354b073453ad9892125739e78468a8dc550e52ccab88df47e

Download Submit
memory/2556-17-0x00007FFEEB110000-0x00007FFEEBBD1000-memory.dmp

Filesize
10.8MB

Download
memory/2556-18-0x00007FFEEB110000-0x00007FFEEBBD1000-memory.dmp

Filesize
10.8MB

Download
memory/2556-19-0x00007FFEEB110000-0x00007FFEEBBD1000-memory.dmp

Filesize
10.8MB

Download
memory/2556-20-0x00007FFEEB110000-0x00007FFEEBBD1000-memory.dmp

Filesize
10.8MB

Download
memory/5088-0-0x00007FFEEB9B3000-0x00007FFEEB9B5000-memory.dmp

Filesize
8KB

Download
memory/5088-1-0x00000000008B0000-0x0000000000942000-memory.dmp

Filesize
584KB

Download
memory/5088-2-0x00000000011F0000-0x00000000011FE000-memory.dmp

Filesize
56KB

Download
memory/5088-3-0x0000000001200000-0x000000000120C000-memory.dmp

Filesize
48KB

Download
memory/5088-6-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download
memory/5088-12-0x00007FFEEB9B0000-0x00007FFEEC471000-memory.dmp

Filesize
10.8MB

Download