dcrat | 0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

Analysis

max time kernel
146s
max time network
152s
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 18:38

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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 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/4436-1-0x0000000000330000-0x00000000003C2000-memory.dmp	family_dcrat_v2
behavioral2/files/0x000c000000023ba4-15.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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	fhjsfryjaspyjga.exe

Executes dropped EXE 1 IoCs

pid	Process
4208	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-1-5-21-3227495264-2217614367-4027411560-1000_Classes\Local Settings	fhjsfryjaspyjga.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4208	staticfile.exe
4208	staticfile.exe
4208	staticfile.exe
4208	staticfile.exe
4208	staticfile.exe
4208	staticfile.exe
4208	staticfile.exe
4208	staticfile.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4208	staticfile.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4436	fhjsfryjaspyjga.exe
Token: SeDebugPrivilege	4208	staticfile.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4436 wrote to memory of 2736	4436	fhjsfryjaspyjga.exe	82
PID 4436 wrote to memory of 2736	4436	fhjsfryjaspyjga.exe	82
PID 2736 wrote to memory of 4364	2736	cmd.exe	84
PID 2736 wrote to memory of 4364	2736	cmd.exe	84
PID 2736 wrote to memory of 4836	2736	cmd.exe	85
PID 2736 wrote to memory of 4836	2736	cmd.exe	85
PID 2736 wrote to memory of 4208	2736	cmd.exe	86
PID 2736 wrote to memory of 4208	2736	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:4436
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\eX9xbBadkO.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2736
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4364
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:4836
- - C:\Users\Admin\AppData\Local\staticfile.exe
    "C:\Users\Admin\AppData\Local\staticfile.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:4208

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\eX9xbBadkO.bat

Filesize
219B

MD5
f816b9d64da6149f90229ef74804fbb2

SHA1
0600a27efedd1460f43295eafa9b1a399a035efc

SHA256
1753d4a1b4a2b5f07962c7e108d78bf15ea90e25ed84ece6549d1f96678acef7

SHA512
5bef940600c8ed9b159681abde9989ce7d952aaf5773f24aa73a4aab950c642cca3210cd648c93af24a22307737c34d039f2054c76bcb728276faef3ef10ab8e

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

Filesize
560KB

MD5
37cb065f052d8cf6a46d41d6225b9a9f

SHA1
ffcd01452c4b695f1371787a5c728c692283fca2

SHA256
0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

SHA512
8a2850f61af22a40ebb1e11c1d294cd74c94cf3b365619a4588bfbc54362575467cff4a5d75f685354b073453ad9892125739e78468a8dc550e52ccab88df47e

Download Submit
memory/4208-21-0x00007FFCC5D30000-0x00007FFCC67F1000-memory.dmp

Filesize
10.8MB

Download
memory/4208-20-0x000000001C650000-0x000000001C7F9000-memory.dmp

Filesize
1.7MB

Download
memory/4208-19-0x00007FFCC5D30000-0x00007FFCC67F1000-memory.dmp

Filesize
10.8MB

Download
memory/4208-18-0x00007FFCC5D30000-0x00007FFCC67F1000-memory.dmp

Filesize
10.8MB

Download
memory/4208-17-0x00007FFCC5D30000-0x00007FFCC67F1000-memory.dmp

Filesize
10.8MB

Download
memory/4436-4-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/4436-13-0x00007FFCC6060000-0x00007FFCC6B21000-memory.dmp

Filesize
10.8MB

Download
memory/4436-3-0x0000000000A70000-0x0000000000A7C000-memory.dmp

Filesize
48KB

Download
memory/4436-0-0x00007FFCC6063000-0x00007FFCC6065000-memory.dmp

Filesize
8KB

Download
memory/4436-2-0x0000000000A60000-0x0000000000A6E000-memory.dmp

Filesize
56KB

Download
memory/4436-1-0x0000000000330000-0x00000000003C2000-memory.dmp

Filesize
584KB

Download