General

  • Target

    4482b36f974e96258f7e207cf45de37ab8fb53af3076bf0cbba9b7166350d647

  • Size

    2.0MB

  • Sample

    240526-1zx1raee96

  • MD5

    6dceefaec3370e2b15a38b8afab89ca0

  • SHA1

    367f0589dd9a16ccf1ee83a8392ed14d8941df21

  • SHA256

    4482b36f974e96258f7e207cf45de37ab8fb53af3076bf0cbba9b7166350d647

  • SHA512

    3e3bada5bd493e753b0cf4ac900ac9857df3e208d8cf5f96e8bf9636a505eac40a623bb3433b06309c0da97380056035f4752154c15844737bf5b81d5803bcd4

  • SSDEEP

    49152:OePpQEJJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEJtIuoITsdZ

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

      4482b36f974e96258f7e207cf45de37ab8fb53af3076bf0cbba9b7166350d647

    • Size

      2.0MB

    • MD5

      6dceefaec3370e2b15a38b8afab89ca0

    • SHA1

      367f0589dd9a16ccf1ee83a8392ed14d8941df21

    • SHA256

      4482b36f974e96258f7e207cf45de37ab8fb53af3076bf0cbba9b7166350d647

    • SHA512

      3e3bada5bd493e753b0cf4ac900ac9857df3e208d8cf5f96e8bf9636a505eac40a623bb3433b06309c0da97380056035f4752154c15844737bf5b81d5803bcd4

    • SSDEEP

      49152:OePpQEJJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEJtIuoITsdZ

    • 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