General

  • Target

    5a8b845edd8d70813c5332eced681cd26e34531d65303c686a31d890d78f9c61

  • Size

    2.0MB

  • Sample

    240527-ay6y6ahh7v

  • MD5

    73c3868deb9cd1e27eb04d7ef0eaf601

  • SHA1

    0bcc435d9798bf2f1a7003a0b01e5b136d8ecb7a

  • SHA256

    5a8b845edd8d70813c5332eced681cd26e34531d65303c686a31d890d78f9c61

  • SHA512

    ddd2f51fa205eb2e5d2a5a503242772352977545430150d95f5c5de9b4a8cb39f1f0c4d23180e370e957c2fef612c1b1abd26bb4c113d08015efa83a47995c86

  • SSDEEP

    49152:OePpQERJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQERtIuoITsdZ

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

      5a8b845edd8d70813c5332eced681cd26e34531d65303c686a31d890d78f9c61

    • Size

      2.0MB

    • MD5

      73c3868deb9cd1e27eb04d7ef0eaf601

    • SHA1

      0bcc435d9798bf2f1a7003a0b01e5b136d8ecb7a

    • SHA256

      5a8b845edd8d70813c5332eced681cd26e34531d65303c686a31d890d78f9c61

    • SHA512

      ddd2f51fa205eb2e5d2a5a503242772352977545430150d95f5c5de9b4a8cb39f1f0c4d23180e370e957c2fef612c1b1abd26bb4c113d08015efa83a47995c86

    • SSDEEP

      49152:OePpQERJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQERtIuoITsdZ

    • 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