General

  • Target

    019f4a42d97d7e08b821d968343fb0f73b066b36983b28cca821f5b7e9e485b2

  • Size

    2.0MB

  • Sample

    240523-a1mnasfc46

  • MD5

    cce0d1b4fb8fd929c7cfe702259384b1

  • SHA1

    a1a68e6984ddd162e4674703eb62070ae45de8fc

  • SHA256

    019f4a42d97d7e08b821d968343fb0f73b066b36983b28cca821f5b7e9e485b2

  • SHA512

    3e77a34ce3f156992c22daf63167f9849e4fa09b8db412cbc91930ebc031f81412526495d36968b355c7a66d437fc4287d12a6140f762aae2deac97c8ca5b050

  • SSDEEP

    49152:7QzHt472DUJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHt2tIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Targets

    • Target

      019f4a42d97d7e08b821d968343fb0f73b066b36983b28cca821f5b7e9e485b2

    • Size

      2.0MB

    • MD5

      cce0d1b4fb8fd929c7cfe702259384b1

    • SHA1

      a1a68e6984ddd162e4674703eb62070ae45de8fc

    • SHA256

      019f4a42d97d7e08b821d968343fb0f73b066b36983b28cca821f5b7e9e485b2

    • SHA512

      3e77a34ce3f156992c22daf63167f9849e4fa09b8db412cbc91930ebc031f81412526495d36968b355c7a66d437fc4287d12a6140f762aae2deac97c8ca5b050

    • SSDEEP

      49152:7QzHt472DUJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHt2tIuoITsdZ

    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • 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

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