General

  • Target

    1b282409371bffd8a0958cfc23fec3f6df136c72f43471ac913f9b904c7a4687

  • Size

    5.0MB

  • Sample

    220520-2qs6waaghp

  • MD5

    8db829ab4445100d2c17ff53f8de0c10

  • SHA1

    f23a8912d4ba7d50c8a062bae3acac48ac4b78fd

  • SHA256

    1b282409371bffd8a0958cfc23fec3f6df136c72f43471ac913f9b904c7a4687

  • SHA512

    a670c51f89e6db3881ba5e743cd162544104584b0d1e6ca085375b9b323c976329565b48c70f0edb77d5ccf4ee4d8bbd6511fa426e677b7f49b28611e995c83a

Malware Config

Targets

    • Target

      Payment receipt.exe

    • Size

      4.9MB

    • MD5

      21ce722319d2e436a23302c488c8e474

    • SHA1

      8926922f8a66a95200513918c5370b3bef143be9

    • SHA256

      c9e3b73cd0bfb2a80b1ac9b3e45272975bdac5ed76ac3f9a5a2e963d82370cca

    • SHA512

      2fe3408605227f45b4cd11e2eb502aa9806665433c3144c93c0c2ef4580de9d755602f232d83c111b9d7e5399c8f080743abda332a77ae107842bac1910df0d7

    • Matiex

      Matiex is a keylogger and infostealer first seen in July 2020.

    • Matiex Main Payload

    • Modifies WinLogon for persistence

    • Modifies Windows Defender Real-time Protection settings

    • Drops startup file

    • 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.

    • Windows security modification

    • Accesses Microsoft Outlook profiles

    • Adds Run key to start application

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

4
T1112

Disabling Security Tools

2
T1089

Credential Access

Credentials in Files

3
T1081

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks