General

  • Target

    SKM_C258 Up21042213080.exe

  • Size

    245KB

  • Sample

    210422-5zfb7dczse

  • MD5

    dc4db6a0a101c438e4fcfc94b8bf7e10

  • SHA1

    d8e984558e6239d15488670ccf61b6156fa151dd

  • SHA256

    62660594fe950472731f11f07d45be81e3b03880953fdc5c3b07b06fae74ea25

  • SHA512

    e24ea0d8614f82fd98fe477e598acf1f310697c0aa668446698120f0d4c6a74c7f6f0f0878f1ffe081523f12b27431772b09a453c47bc7c0026d8a3988cd588d

Malware Config

Extracted

Family

oski

C2

45.144.225.118

Extracted

Family

azorult

C2

http://lexusbiscuit.com/OiuBn/index.php

Targets

    • Target

      SKM_C258 Up21042213080.exe

    • Size

      245KB

    • MD5

      dc4db6a0a101c438e4fcfc94b8bf7e10

    • SHA1

      d8e984558e6239d15488670ccf61b6156fa151dd

    • SHA256

      62660594fe950472731f11f07d45be81e3b03880953fdc5c3b07b06fae74ea25

    • SHA512

      e24ea0d8614f82fd98fe477e598acf1f310697c0aa668446698120f0d4c6a74c7f6f0f0878f1ffe081523f12b27431772b09a453c47bc7c0026d8a3988cd588d

    • Azorult

      An information stealer that was first discovered in 2016, targeting browsing history and passwords.

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • 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.

    • 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 v6

Credential Access

Credentials in Files

5
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

5
T1005

Tasks