Overview

overview

10

Static

static

3

DOCUMENT.exe

windows7-x64

10

DOCUMENT.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    JaffaCakes118_76b900c663d3733b89501e7034a631d0
  • Size 833KB
  • Sample250104-bevx8asphx
  • SHA256 8371ad57c9f598e7bad4e96b4c4e0749971cbe42cfd175b0b8dbedab90eb7bea
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
isrstealercollectiondiscoveryevasionpersistencestealertrojanupx

Malware Config

Targets

    • Target
      DOCUMENT.exe
    • Size 941KB
    • SHA256 7b6570a85ef1600456266810593fd5e2de186f34ed7868ace12148ec14f8812e
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    isrstealercollectiondiscoveryevasionpersistencestealertrojanupx

    • ISR Stealer

      ISR Stealer is a modified version of Hackhound Stealer written in visual basic.

      trojanstealerisrstealer

    • ISR Stealer payload

    • Isrstealer family

      isrstealer

    • Modifies visiblity of hidden/system files in Explorer

      evasion

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Accesses Microsoft Outlook accounts

      collection

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      evasiontrojan

    • Suspicious use of SetThreadContext

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

      upx
    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks