General

  • Target

    16f68e14ac5306881f082a811eb3039891ed6a2e4e716e5f02f4cd00400b64c6

  • Size

    1.9MB

  • Sample

    240527-z16tlsbc92

  • MD5

    1af7c31fde13c5b8e70a6946324e2fa3

  • SHA1

    293523f498bb7d006a3b0c962e22ceb811292b16

  • SHA256

    16f68e14ac5306881f082a811eb3039891ed6a2e4e716e5f02f4cd00400b64c6

  • SHA512

    e6d8af2c41d5e5168772f0f9351fc19c702958c423314f4c96d1acc33fe306f2f06631febae604e44891f8be865db79e6f52b2cb0dd2a578dab58863f099adb5

  • SSDEEP

    49152:CdKfTn6vOJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTndtIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Targets

    • Target

      16f68e14ac5306881f082a811eb3039891ed6a2e4e716e5f02f4cd00400b64c6

    • Size

      1.9MB

    • MD5

      1af7c31fde13c5b8e70a6946324e2fa3

    • SHA1

      293523f498bb7d006a3b0c962e22ceb811292b16

    • SHA256

      16f68e14ac5306881f082a811eb3039891ed6a2e4e716e5f02f4cd00400b64c6

    • SHA512

      e6d8af2c41d5e5168772f0f9351fc19c702958c423314f4c96d1acc33fe306f2f06631febae604e44891f8be865db79e6f52b2cb0dd2a578dab58863f099adb5

    • SSDEEP

      49152:CdKfTn6vOJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTndtIuoITsdZ

    • 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 Enterprise v15

Tasks