Analysis

  • max time kernel
    4294179s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20220311-en
  • submitted
    12-03-2022 05:57

General

  • Target

    98ef2ef656e87c35a07d919b391f3f772cc4d4ae0c1a9c67290e89b206677e6f.exe

  • Size

    548KB

  • MD5

    808c074ba15f5206d5e3ba380b67e977

  • SHA1

    908df198b1ac1402be6933cbeafd6fdd715ca918

  • SHA256

    98ef2ef656e87c35a07d919b391f3f772cc4d4ae0c1a9c67290e89b206677e6f

  • SHA512

    a01232c4289d7b37c6cd85f7759f4c9bf6579aac50d6d8d5af8c330f37a5b3a3b528031388055c3ec99e186a7395f4db94ad5f5e35dfb9f7bd442811b464b9ee

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer Payload 2 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 IoCs
  • Executes dropped EXE 3 IoCs
  • UPX packed file 8 IoCs

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

  • Loads dropped DLL 3 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\98ef2ef656e87c35a07d919b391f3f772cc4d4ae0c1a9c67290e89b206677e6f.exe
    "C:\Users\Admin\AppData\Local\Temp\98ef2ef656e87c35a07d919b391f3f772cc4d4ae0c1a9c67290e89b206677e6f.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1776
    • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
      C:\Users\Admin\AppData\Local\Temp\\cvtres.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1680
      • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
        "C:\Users\Admin\AppData\Local\Temp\cvtres.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:512
        • C:\Users\Admin\AppData\Local\Temp\cvtres.exe
          "C:\Users\Admin\AppData\Local\Temp\cvtres.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
          4⤵
          • Executes dropped EXE
          PID:2044
        • C:\Windows\SysWOW64\svchost.exe
          "C:\Windows\System32\svchost.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data1.dmp
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1508
        • C:\Windows\SysWOW64\svchost.exe
          "C:\Windows\System32\svchost.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data2.dmp
          4⤵
          • Accesses Microsoft Outlook accounts
          PID:1320

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/512-90-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/512-78-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/512-88-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/512-93-0x0000000000622000-0x0000000000624000-memory.dmp

    Filesize

    8KB

  • memory/512-72-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/512-74-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/512-76-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/512-92-0x0000000000230000-0x0000000000231000-memory.dmp

    Filesize

    4KB

  • memory/512-80-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/512-82-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/512-84-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/512-86-0x0000000000400000-0x000000000045F000-memory.dmp

    Filesize

    380KB

  • memory/1320-108-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1320-116-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1320-115-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1320-112-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1320-117-0x0000000000400000-0x000000000041F000-memory.dmp

    Filesize

    124KB

  • memory/1508-104-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1508-111-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1508-107-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1508-102-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1508-109-0x0000000000400000-0x0000000000426000-memory.dmp

    Filesize

    152KB

  • memory/1680-65-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/1680-63-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/1680-61-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/1680-59-0x0000000000400000-0x0000000000470000-memory.dmp

    Filesize

    448KB

  • memory/1776-55-0x0000000074E10000-0x00000000753BB000-memory.dmp

    Filesize

    5.7MB

  • memory/1776-56-0x0000000000290000-0x0000000000291000-memory.dmp

    Filesize

    4KB

  • memory/1776-57-0x0000000074E10000-0x00000000753BB000-memory.dmp

    Filesize

    5.7MB

  • memory/1776-54-0x0000000075C41000-0x0000000075C43000-memory.dmp

    Filesize

    8KB

  • memory/2044-95-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/2044-101-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB

  • memory/2044-97-0x0000000000400000-0x0000000000454000-memory.dmp

    Filesize

    336KB