General

  • Target

    file.exe

  • Size

    4.9MB

  • Sample

    221005-vx5d6afab8

  • MD5

    f3e98458c6afc2c7f2456b55ee758568

  • SHA1

    dce0c5c299a29706654393307efd4bd439a63996

  • SHA256

    c6af08db8d058efc88312d44e1906f4e7cec8d27bd99af3ccd9b09c045551ee3

  • SHA512

    2054c9f0af3bc820f6bf7daa8c4968a52ce282266c9dc6322945f73f7d45ee31e78b84fc81f9d9de83e0d5b85a827f1e5c9dfc5294577e95bfb8251d3f0e0bb5

  • SSDEEP

    98304:4NoZ0HR04Up9OHxAXvS+qdwJ6Vgf8233IAW9fPxPGSKNrA09UXYlpkBFE:n0HR0dp9xvSbdeoE3IAsZPGSyA5XI4

Malware Config

Extracted

Family

vidar

Version

54.9

Botnet

1679

C2

https://t.me/larsenup

https://ioc.exchange/@zebra54

Attributes
  • profile_id

    1679

Targets

    • Target

      file.exe

    • Size

      4.9MB

    • MD5

      f3e98458c6afc2c7f2456b55ee758568

    • SHA1

      dce0c5c299a29706654393307efd4bd439a63996

    • SHA256

      c6af08db8d058efc88312d44e1906f4e7cec8d27bd99af3ccd9b09c045551ee3

    • SHA512

      2054c9f0af3bc820f6bf7daa8c4968a52ce282266c9dc6322945f73f7d45ee31e78b84fc81f9d9de83e0d5b85a827f1e5c9dfc5294577e95bfb8251d3f0e0bb5

    • SSDEEP

      98304:4NoZ0HR04Up9OHxAXvS+qdwJ6Vgf8233IAW9fPxPGSKNrA09UXYlpkBFE:n0HR0dp9xvSbdeoE3IAsZPGSyA5XI4

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

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

    • Checks BIOS information in registry

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

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses 2FA software files, possible credential harvesting

    • 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.

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

5
T1082

Collection

Data from Local System

3
T1005

Tasks