General

  • Target

    fae57d3f7b959dfc9e9f7b3329c58bfb20a6473c1b35ce991cb336a6413f412e

  • Size

    2.8MB

  • Sample

    220625-ey1jlagbe6

  • MD5

    42dfab1fc3e86efb33605a188238785f

  • SHA1

    2143d6fc6f94dca174ceed7a2ea9af40f7a73408

  • SHA256

    fae57d3f7b959dfc9e9f7b3329c58bfb20a6473c1b35ce991cb336a6413f412e

  • SHA512

    ff06aae357ee661c5d18fd66020f20d5d5891faff803a31cb98757015f37e1fbe373a7778064b6e03d9389638d0c42701806175e0ec78506f653c83957c2f0d1

Malware Config

Extracted

Family

vidar

Version

25.3

Botnet

539

C2

http://rattlesnakespr.com/

Attributes
  • profile_id

    539

Targets

    • Target

      fae57d3f7b959dfc9e9f7b3329c58bfb20a6473c1b35ce991cb336a6413f412e

    • Size

      2.8MB

    • MD5

      42dfab1fc3e86efb33605a188238785f

    • SHA1

      2143d6fc6f94dca174ceed7a2ea9af40f7a73408

    • SHA256

      fae57d3f7b959dfc9e9f7b3329c58bfb20a6473c1b35ce991cb336a6413f412e

    • SHA512

      ff06aae357ee661c5d18fd66020f20d5d5891faff803a31cb98757015f37e1fbe373a7778064b6e03d9389638d0c42701806175e0ec78506f653c83957c2f0d1

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

      suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Vidar Stealer

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Reads local data of messenger clients

      Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

    • 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.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Accesses 2FA software files, possible credential harvesting

    • Checks installed software on the system

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

    • Checks whether UAC is enabled

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

4
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

3
T1082

Collection

Data from Local System

4
T1005

Tasks