General

  • Target

    1127c7f40292bafad2b67216e3bb531155b4a7518fa66cebfdb644d49c5bba3c

  • Size

    2.0MB

  • Sample

    240525-2xrlmade8x

  • MD5

    9d5dc4e231f602620e299ccedbd73d3f

  • SHA1

    c37107fe431a28e0cc4497d4d325ad2f545cc9fd

  • SHA256

    1127c7f40292bafad2b67216e3bb531155b4a7518fa66cebfdb644d49c5bba3c

  • SHA512

    1456276c938d1288d22dce00521bf3ea93c004171bf373f80f3aa82d7b079829e5d3bd3c8e8a44a0d0bb0858e468c1d8556295814316e570b2a6c930d9f3269a

  • SSDEEP

    49152:s4K3x1vUKJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18KtIuoITsdZ

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

      1127c7f40292bafad2b67216e3bb531155b4a7518fa66cebfdb644d49c5bba3c

    • Size

      2.0MB

    • MD5

      9d5dc4e231f602620e299ccedbd73d3f

    • SHA1

      c37107fe431a28e0cc4497d4d325ad2f545cc9fd

    • SHA256

      1127c7f40292bafad2b67216e3bb531155b4a7518fa66cebfdb644d49c5bba3c

    • SHA512

      1456276c938d1288d22dce00521bf3ea93c004171bf373f80f3aa82d7b079829e5d3bd3c8e8a44a0d0bb0858e468c1d8556295814316e570b2a6c930d9f3269a

    • SSDEEP

      49152:s4K3x1vUKJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18KtIuoITsdZ

    • 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