General

  • Target

    ##!!SetUp_5566_Pa$sW0rd$$!!.zip

  • Size

    14.0MB

  • Sample

    240614-tjbn9axerb

  • MD5

    c5beb2107b1c858ace78ea6ce60ba131

  • SHA1

    7d9fab73d76f00933107d8dc680aa6d1de053538

  • SHA256

    25cbba8cb4b96c8b9e6c8490c2460eb8fecb3b6dd4eb8fc2a06392cb018dda5b

  • SHA512

    307604092c9574fcaaf134def38e815de50d48835c5167086fdab5963a6e195633bcb59b667f102f02be01192984a975a2691897c3bbc2be855d036c5a7b1e47

  • SSDEEP

    393216:qzEczUdMmVDBOxcEE/S17dGzzSlnsmLbIzNkqo6Wu+9Tq:qgczU2mVDEy7egzzSlnsSICU7Mq

Malware Config

Extracted

Family

stealc

rc4.plain

Targets

    • Target

      ##!!SetUp_5566_Pa$sW0rd$$!!/Setup.exe

    • Size

      5.4MB

    • MD5

      ad2735f096925010a53450cb4178c89e

    • SHA1

      c6d65163c6315a642664f4eaec0fae9528549bfe

    • SHA256

      4e775b5fafb4e6d89a4694f8694d2b8b540534bd4a52ff42f70095f1c929160e

    • SHA512

      1868b22a7c5cba89545b06f010c09c5418b3d86039099d681eee9567c47208fdba3b89c6251cf03c964c58c805280d45ba9c3533125f6bd3e0bc067477e03ab9

    • SSDEEP

      98304:o/zx+riUDpJowboU+XEsumY2XW6jBYeZ1ER:2x+riUDwUj12X1tY5

    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

4
T1552.001

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

4
T1005

Tasks