dcrat | 0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

General

Target

0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01.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/1264-1-0x0000000000240000-0x00000000002D2000-memory.dmp	family_dcrat_v2
behavioral2/files/0x0033000000023b78-15.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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01.exe

Executes dropped EXE 1 IoCs

pid	Process
2812	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-1-5-21-493223053-2004649691-1575712786-1000_Classes\Local Settings	0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2812	staticfile.exe
2812	staticfile.exe
2812	staticfile.exe
2812	staticfile.exe
2812	staticfile.exe
2812	staticfile.exe
2812	staticfile.exe
2812	staticfile.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1264	0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01.exe
Token: SeDebugPrivilege	2812	staticfile.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1264 wrote to memory of 4556	1264	0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01.exe	83
PID 1264 wrote to memory of 4556	1264	0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01.exe	83
PID 4556 wrote to memory of 2276	4556	cmd.exe	85
PID 4556 wrote to memory of 2276	4556	cmd.exe	85
PID 4556 wrote to memory of 3492	4556	cmd.exe	86
PID 4556 wrote to memory of 3492	4556	cmd.exe	86
PID 4556 wrote to memory of 2812	4556	cmd.exe	88
PID 4556 wrote to memory of 2812	4556	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01.exe
"C:\Users\Admin\AppData\Local\Temp\0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1264
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\11t0zNY5Ue.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4556
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2276
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:3492
- - 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:2812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\11t0zNY5Ue.bat

Filesize
219B

MD5
ff6ca6ded0868a2b2b93f65eeee5bf92

SHA1
d83d5d34e55e10263dfb4fab0ba46f9336906630

SHA256
9660d03b43cd6346209896d5fb9bdef5284aeeea42ec9c03c6b219f3f84e81f0

SHA512
30cbd414b94f1ed09f39ce686a285bf1516cf7d2c7ee8659b9b9e5e03c655f91e5b0d37c1a648b5147dd5b9a858765c74b52b97f850a812d00483146acc650d5

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

Filesize
560KB

MD5
37cb065f052d8cf6a46d41d6225b9a9f

SHA1
ffcd01452c4b695f1371787a5c728c692283fca2

SHA256
0b3af32b322e30f7f68017c13e59e71b6b1f26756477e122b40a20434bd01d01

SHA512
8a2850f61af22a40ebb1e11c1d294cd74c94cf3b365619a4588bfbc54362575467cff4a5d75f685354b073453ad9892125739e78468a8dc550e52ccab88df47e

Download Submit
memory/1264-0-0x00007FF8FC723000-0x00007FF8FC725000-memory.dmp

Filesize
8KB

Download
memory/1264-1-0x0000000000240000-0x00000000002D2000-memory.dmp

Filesize
584KB

Download
memory/1264-2-0x0000000000A70000-0x0000000000A7E000-memory.dmp

Filesize
56KB

Download
memory/1264-3-0x0000000000A80000-0x0000000000A8C000-memory.dmp

Filesize
48KB

Download
memory/1264-4-0x00007FF8FC720000-0x00007FF8FD1E1000-memory.dmp

Filesize
10.8MB

Download
memory/1264-13-0x00007FF8FC720000-0x00007FF8FD1E1000-memory.dmp

Filesize
10.8MB

Download
memory/2812-17-0x00007FF8FBFA0000-0x00007FF8FCA61000-memory.dmp

Filesize
10.8MB

Download
memory/2812-18-0x00007FF8FBFA0000-0x00007FF8FCA61000-memory.dmp

Filesize
10.8MB

Download
memory/2812-19-0x00007FF8FBFA0000-0x00007FF8FCA61000-memory.dmp

Filesize
10.8MB

Download
memory/2812-20-0x00007FF8FBFA0000-0x00007FF8FCA61000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing