General

  • Target

    808f3751aad0d9b9e3b5b85263803162928caedcb16edcb8cb8985583ab9351b

  • Size

    2.0MB

  • Sample

    240526-arwvlsgf94

  • MD5

    553b7dc8410777d155244488553fcb23

  • SHA1

    fb8871e1f64544a2caad4f8a3cafbe503bd6f848

  • SHA256

    808f3751aad0d9b9e3b5b85263803162928caedcb16edcb8cb8985583ab9351b

  • SHA512

    2f590798a444c0a42804fc0398405054806ac057e1b45a2072148935b435bccff523743c44f4f04a01a03f2f38c29c79e4f9acd9919901ad57431ed605693840

  • SSDEEP

    49152:s4K3x1vU6JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex186tIuoITsdZ

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

      808f3751aad0d9b9e3b5b85263803162928caedcb16edcb8cb8985583ab9351b

    • Size

      2.0MB

    • MD5

      553b7dc8410777d155244488553fcb23

    • SHA1

      fb8871e1f64544a2caad4f8a3cafbe503bd6f848

    • SHA256

      808f3751aad0d9b9e3b5b85263803162928caedcb16edcb8cb8985583ab9351b

    • SHA512

      2f590798a444c0a42804fc0398405054806ac057e1b45a2072148935b435bccff523743c44f4f04a01a03f2f38c29c79e4f9acd9919901ad57431ed605693840

    • SSDEEP

      49152:s4K3x1vU6JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex186tIuoITsdZ

    • 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