Analysis

  • max time kernel
    74s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-04-2022 02:16

General

  • Target

    20a4e9a7d6416e639eea0b2b5bb70e005406be250f6b2aa4a38b5deedad29f6a.exe

  • Size

    864KB

  • MD5

    dba45b78198d8bc0d5baddecc15e58a0

  • SHA1

    51324f74e8bb21ac03fe082bf03de3eaaa83503d

  • SHA256

    20a4e9a7d6416e639eea0b2b5bb70e005406be250f6b2aa4a38b5deedad29f6a

  • SHA512

    9f14b263ec835db48dfdd278d61ad07b1e075075fa9e5fe23d26d61c08f7b061dcf6efc9d8c9591ce0fa43f48a71247d5a73ed2fb6ba48d00556e12ab1ca0c03

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.krsmakina.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    XqDx*4o&I0w,

Signatures

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • MassLogger Main Payload 7 IoCs
  • 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 35 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • 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
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\20a4e9a7d6416e639eea0b2b5bb70e005406be250f6b2aa4a38b5deedad29f6a.exe
    "C:\Users\Admin\AppData\Local\Temp\20a4e9a7d6416e639eea0b2b5bb70e005406be250f6b2aa4a38b5deedad29f6a.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Users\Admin\AppData\Local\Temp\20a4e9a7d6416e639eea0b2b5bb70e005406be250f6b2aa4a38b5deedad29f6a.exe
      "{path}"
      2⤵
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:652
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\20a4e9a7d6416e639eea0b2b5bb70e005406be250f6b2aa4a38b5deedad29f6a.exe'
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1460

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/652-63-0x000000000048181E-mapping.dmp

  • memory/652-69-0x0000000000B05000-0x0000000000B16000-memory.dmp

    Filesize

    68KB

  • memory/652-65-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/652-67-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/652-58-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/652-61-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/652-60-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/652-62-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/652-72-0x0000000005FA0000-0x0000000006030000-memory.dmp

    Filesize

    576KB

  • memory/652-71-0x0000000005010000-0x000000000504E000-memory.dmp

    Filesize

    248KB

  • memory/652-57-0x0000000000400000-0x0000000000486000-memory.dmp

    Filesize

    536KB

  • memory/1460-70-0x00000000754A1000-0x00000000754A3000-memory.dmp

    Filesize

    8KB

  • memory/1460-68-0x0000000000000000-mapping.dmp

  • memory/1460-74-0x00000000003F0000-0x0000000000430000-memory.dmp

    Filesize

    256KB

  • memory/1460-73-0x000000006EE40000-0x000000006F3EB000-memory.dmp

    Filesize

    5.7MB

  • memory/1948-55-0x0000000000550000-0x000000000056E000-memory.dmp

    Filesize

    120KB

  • memory/1948-56-0x0000000008500000-0x00000000085B2000-memory.dmp

    Filesize

    712KB

  • memory/1948-54-0x0000000000B70000-0x0000000000C4E000-memory.dmp

    Filesize

    888KB