Overview

overview

10

Static

static

3

install.exe

windows10-ltsc 2021-x64

10

install.exe

windows11-21h2-x64

3

Sharing

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General

  • Target

    install.exe

  • Size

    4.3MB

  • Sample

    241120-pejf3s1mar

  • MD5

    c8868d0efa08db9acf9f1be0ea1de96b

  • SHA1

    327b71fa12b87caf9868a6bc18857f78a19fbc43

  • SHA256

    f9ce5f29f9fee9b30206253d77cf17870ee82765b36f51749e08b3a14d52d6db

  • SHA512

    5ac067b46391fb2c41487235eb2a3e57d8b2984ee906f869ad8a20154baba09c09852d9384999bbdee6a2f83263201dcc811bf8386fba3a9a2151c181d6d4690

  • SSDEEP

    98304:4Ps0/vuEKE162HsxtixUU4hR1HxtixUU4hR1F:KaTxtixRCZxtixRC3

Score
10/10
dcratdiscoveryinfostealerpersistenceratspywarestealer

Malware Config

Targets

    • Target

      install.exe

    • Size

      4.3MB

    • MD5

      c8868d0efa08db9acf9f1be0ea1de96b

    • SHA1

      327b71fa12b87caf9868a6bc18857f78a19fbc43

    • SHA256

      f9ce5f29f9fee9b30206253d77cf17870ee82765b36f51749e08b3a14d52d6db

    • SHA512

      5ac067b46391fb2c41487235eb2a3e57d8b2984ee906f869ad8a20154baba09c09852d9384999bbdee6a2f83263201dcc811bf8386fba3a9a2151c181d6d4690

    • SSDEEP

      98304:4Ps0/vuEKE162HsxtixUU4hR1HxtixUU4hR1F:KaTxtixRCZxtixRC3

    Score
    10/10
    dcratdiscoveryinfostealerpersistenceratspywarestealer

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

      ratinfostealerdcrat

    • Dcrat family

      dcrat

    • Modifies WinLogon for persistence

      persistence

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • DCRat payload

      rat

    • Checks computer location settings

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

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

2
T1112

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks