dcrat | 285725b9100603eea2e9c67d60c367e734123aaa220e6989d41ccdbd09c34856

Analysis

max time kernel
95s
max time network
96s
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 04:05

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General

Target

285725b9100603eea2e9c67d60c367e734123aaa220e6989d41ccdbd09c34856N.exe
Size

427KB
MD5

fd27e07622f1bfcaa1136e947e48c740
SHA1

2506bce8dcf5f1fe7872aefee13803def7bd1659
SHA256

285725b9100603eea2e9c67d60c367e734123aaa220e6989d41ccdbd09c34856
SHA512

17a0c964c83cc4dbc8e930b3eb8afd9209168f882ac82fabf690afcdb7240da646e348033e502a010b563e736f0a2cb410deb1bc54bb3982d15f5eede2129657
SSDEEP

6144:OAFvyPmv34F6CYlaAD3l0HkffT+DOsrTyFyiYy73KywNz:OAk+4HYlti8qDZyyTy73Kym

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/files/0x000a000000023b56-19.dat	family_dcrat_v2
behavioral2/memory/3960-22-0x0000000000340000-0x0000000000C96000-memory.dmp	family_dcrat_v2

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

Processes:

MsBrowserreviewDriverPerf.exe

pid	Process
3960	MsBrowserreviewDriverPerf.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

Processes:

flow	ioc
20	raw.githubusercontent.com
21	raw.githubusercontent.com

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

MsBrowserreviewDriverPerf.exe

pid	Process
3960	MsBrowserreviewDriverPerf.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

285725b9100603eea2e9c67d60c367e734123aaa220e6989d41ccdbd09c34856N.exe

description	pid	Process	procid_target
PID 1916 wrote to memory of 3960	1916	285725b9100603eea2e9c67d60c367e734123aaa220e6989d41ccdbd09c34856N.exe	82
PID 1916 wrote to memory of 3960	1916	285725b9100603eea2e9c67d60c367e734123aaa220e6989d41ccdbd09c34856N.exe	82

C:\Users\Admin\AppData\Local\Temp\285725b9100603eea2e9c67d60c367e734123aaa220e6989d41ccdbd09c34856N.exe
"C:\Users\Admin\AppData\Local\Temp\285725b9100603eea2e9c67d60c367e734123aaa220e6989d41ccdbd09c34856N.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Windows\Temp\MsBrowserreviewDriverPerf.exe
  C:\Windows\Temp\MsBrowserreviewDriverPerf.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:3960

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\Temp\MsBrowserreviewDriverPerf.exe

Filesize
6.2MB

MD5
0835aac5054b99b000b6d51141bb54e6

SHA1
504731f62bd503bf14557d9203202179c102289a

SHA256
e93af24c6a6362cb832dfca5c6ea2f3fc84dd96b451f8fd9738b8f7f880e9f8c

SHA512
7608a81d21302e0544d86309c17c5780ce4cd74e2c163134cfd65c16d91f71a58bb7260890e745978ce1391b04b74d5ce66ac14527d485a9b069a2499df29f0e

Download Submit
memory/3960-21-0x00007FFDBCA03000-0x00007FFDBCA05000-memory.dmp

Filesize
8KB

Download
memory/3960-22-0x0000000000340000-0x0000000000C96000-memory.dmp

Filesize
9.3MB

Download
memory/3960-23-0x00007FFDBCA00000-0x00007FFDBD4C1000-memory.dmp

Filesize
10.8MB

Download
memory/3960-24-0x0000000001540000-0x0000000001541000-memory.dmp

Filesize
4KB

Download
memory/3960-26-0x00007FFDBCA00000-0x00007FFDBD4C1000-memory.dmp

Filesize
10.8MB

Download