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Overview

overview

10

Static

static

1

mysetup.exe

windows7-x64

7

mysetup.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    mysetup.exe

  • Size

    2.2MB

  • Sample

    241129-2fcq5szkdx

  • MD5

    5cb042f9877f5876a19c86ded15fb1f8

  • SHA1

    12249b4e9e8f5a3d66259d9172f8b6d4225812ab

  • SHA256

    e29d2bd946212328bcdf783eb434e1b384445f4c466c5231f91a07a315484819

  • SHA512

    f6c4c9198de1d3a18815db38e50f36f7f73103a050f07c73ad83e05371a7a13be985a84c437ce27a74638d96fffda1eb860fa3b7923e47d020a3912cecd3f490

  • SSDEEP

    49152:FBuZrEUcH4ytTJpIbxrvfqKIy029s4C1eH9K:jkLcH4ytItfgt29s4C1eH9K

Score
10/10
koiloaderdiscoveryexecutionloader

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

http://79.124.78.109/wp-includes/phyllopodan7V7GD.php
exe.dropper

http://79.124.78.109/wp-includes/barasinghaby.ps1

Extracted

Family

koiloader

C2

http://79.124.78.109/flocking.php

Targets

    • Target

      mysetup.exe

    • Size

      2.2MB

    • MD5

      5cb042f9877f5876a19c86ded15fb1f8

    • SHA1

      12249b4e9e8f5a3d66259d9172f8b6d4225812ab

    • SHA256

      e29d2bd946212328bcdf783eb434e1b384445f4c466c5231f91a07a315484819

    • SHA512

      f6c4c9198de1d3a18815db38e50f36f7f73103a050f07c73ad83e05371a7a13be985a84c437ce27a74638d96fffda1eb860fa3b7923e47d020a3912cecd3f490

    • SSDEEP

      49152:FBuZrEUcH4ytTJpIbxrvfqKIy029s4C1eH9K:jkLcH4ytItfgt29s4C1eH9K

    Score
    10/10
    discoveryexecutionkoiloaderloader

    • KoiLoader

      KoiLoader is a malware loader written in C++.

      loaderkoiloader

    • Koiloader family

      koiloader

    • Detects KoiLoader payload

      loader

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks