General

  • Target

    75aee83de71dfd55632d5aba70eb7670277a2a0797f4b033fae83a916db476a1

  • Size

    2.0MB

  • Sample

    240522-12tfcaag96

  • MD5

    1e73837fd737cdfb77179b8c6706450d

  • SHA1

    fef5d663d8622502cc73ae67c3ddcf6d1088550b

  • SHA256

    75aee83de71dfd55632d5aba70eb7670277a2a0797f4b033fae83a916db476a1

  • SHA512

    5df5a0d87c3f1c32241c9135b2e8479449727fcf51269f6369ef68b7b5d924aa9a1db2b5177189bf4714e9521649aad0b8798a718e4f4fef134029da00f6d631

  • SSDEEP

    49152:7QzHt472D+JtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtEtIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Targets

    • Target

      75aee83de71dfd55632d5aba70eb7670277a2a0797f4b033fae83a916db476a1

    • Size

      2.0MB

    • MD5

      1e73837fd737cdfb77179b8c6706450d

    • SHA1

      fef5d663d8622502cc73ae67c3ddcf6d1088550b

    • SHA256

      75aee83de71dfd55632d5aba70eb7670277a2a0797f4b033fae83a916db476a1

    • SHA512

      5df5a0d87c3f1c32241c9135b2e8479449727fcf51269f6369ef68b7b5d924aa9a1db2b5177189bf4714e9521649aad0b8798a718e4f4fef134029da00f6d631

    • SSDEEP

      49152:7QzHt472D+JtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtEtIuoITsdZ

    • 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