Analysis

  • max time kernel
    95s
  • max time network
    100s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 01:46

General

  • Target

    4f65afff4bbaee37d797d5f695d78412a53221a6d1c0fd80d750648df039ff5c.exe

  • Size

    501KB

  • MD5

    7860c138e3b8f40bfb6efec08f4a4068

  • SHA1

    28718036a0ff9ecd92e794cefc429f3d4aea7ba1

  • SHA256

    4f65afff4bbaee37d797d5f695d78412a53221a6d1c0fd80d750648df039ff5c

  • SHA512

    71686bdfa1d10e50ee82374dfde16c45b3bc338065f24e3f5f68ddf984ba6a97624e88f147183c9f3874d14725d75e236d0c209d3eb5d924e9dff3ac1815f620

Malware Config

Extracted

Family

azorult

C2

http://crevisoft.net/images/backgrounds/ob/index.php

Signatures

  • Azorult

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

  • suricata: ET MALWARE AZORult Variant.4 Checkin M2

    suricata: ET MALWARE AZORult Variant.4 Checkin M2

  • suricata: ET MALWARE Win32/AZORult V3.2 Client Checkin M5

    suricata: ET MALWARE Win32/AZORult V3.2 Client Checkin M5

  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4f65afff4bbaee37d797d5f695d78412a53221a6d1c0fd80d750648df039ff5c.exe
    "C:\Users\Admin\AppData\Local\Temp\4f65afff4bbaee37d797d5f695d78412a53221a6d1c0fd80d750648df039ff5c.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:536
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YJSlNpkH" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC015.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1752
    • C:\Users\Admin\AppData\Local\Temp\4f65afff4bbaee37d797d5f695d78412a53221a6d1c0fd80d750648df039ff5c.exe
      "C:\Users\Admin\AppData\Local\Temp\4f65afff4bbaee37d797d5f695d78412a53221a6d1c0fd80d750648df039ff5c.exe"
      2⤵
      • Modifies system certificate store
      PID:268

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpC015.tmp

    Filesize

    1KB

    MD5

    49d3009901c448f7f5879d6e28891910

    SHA1

    a4a2527912c095627af0da68a5baf66eeb009651

    SHA256

    50d86860dc0ae79596e04aa0cbcd345410eeb72bea7653bcf1c82be105659c6c

    SHA512

    83765bd487a7288d18f9da290dc82fca7678659d48dc7197ee48a7f2d2aa67ed71ba34bdf84fbcd9d4621ba746756dce53b9cec52ca62eace3ab78b0c3d59d3c

  • memory/268-68-0x0000000000400000-0x0000000000420000-memory.dmp

    Filesize

    128KB

  • memory/268-66-0x0000000000400000-0x0000000000420000-memory.dmp

    Filesize

    128KB

  • memory/268-73-0x0000000000400000-0x0000000000420000-memory.dmp

    Filesize

    128KB

  • memory/268-71-0x0000000000400000-0x0000000000420000-memory.dmp

    Filesize

    128KB

  • memory/268-69-0x000000000041A1F8-mapping.dmp

  • memory/268-62-0x0000000000400000-0x0000000000420000-memory.dmp

    Filesize

    128KB

  • memory/268-65-0x0000000000400000-0x0000000000420000-memory.dmp

    Filesize

    128KB

  • memory/268-64-0x0000000000400000-0x0000000000420000-memory.dmp

    Filesize

    128KB

  • memory/268-61-0x0000000000400000-0x0000000000420000-memory.dmp

    Filesize

    128KB

  • memory/536-56-0x0000000004A40000-0x0000000004A9E000-memory.dmp

    Filesize

    376KB

  • memory/536-55-0x0000000000380000-0x0000000000390000-memory.dmp

    Filesize

    64KB

  • memory/536-54-0x0000000001020000-0x00000000010A4000-memory.dmp

    Filesize

    528KB

  • memory/536-58-0x0000000075B61000-0x0000000075B63000-memory.dmp

    Filesize

    8KB

  • memory/536-57-0x0000000000CD0000-0x0000000000D02000-memory.dmp

    Filesize

    200KB

  • memory/1752-59-0x0000000000000000-mapping.dmp