Overview

overview

10

Static

static

84b5f339ee...5d.exe

windows7_x64

10

84b5f339ee...5d.exe

windows10_x64

10

Analysis

  • max time kernel
    143s
  • max time network
    123s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    13/08/2021, 16:22

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General

  • Target
    84b5f339ee516b5a673b00b04485fe5d.exe
  • Size 35KB
  • Sample210813-vxep3grane
  • SHA256 694c513735b327961745d7e6da7f10c982b532fa4ce3f52b817dfdd2d7ec2e21
  • MD5 SHA1 SHA512
Score
10/10
persistence

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
    persistence
  • Modifies Installed Components in the registry 2 TTPs
    persistence
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 10 IoCs

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

  • Enumerates system info in registry 2 TTPs 2 IoCs
  • Modifies registry class 29 IoCs
  • Suspicious use of AdjustPrivilegeToken 37 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 21 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\84b5f339ee516b5a673b00b04485fe5d.exe
    "C:\Users\Admin\AppData\Local\Temp\84b5f339ee516b5a673b00b04485fe5d.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4796
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:3900
      • C:\Windows\system32\ctfmon.exe
        ctfmon.exe
        3⤵
          PID:852
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Default 45.153.241.244 5506 PTUelvuHS
        2⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2888
    • C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe
      "C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca
      1⤵
      • Enumerates system info in registry
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:1212
    • C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
      "C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
      1⤵
      • Suspicious use of SetWindowsHookEx
      PID:1396

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/2888-121-0x0000000000400000-0x0000000000412000-memory.dmp
          Download

          memory/2888-128-0x0000000008FA0000-0x0000000008FA1000-memory.dmp
          Download

          memory/2888-131-0x00000000092E0000-0x00000000092E1000-memory.dmp
          Download

          memory/3900-132-0x00000000022E0000-0x00000000022E1000-memory.dmp
          Download

          memory/4796-114-0x0000000000F10000-0x0000000000F11000-memory.dmp
          Download

          memory/4796-116-0x0000000005D40000-0x0000000005D41000-memory.dmp
          Download

          memory/4796-117-0x0000000005840000-0x0000000005D3E000-memory.dmp
          Download

          memory/4796-118-0x0000000003320000-0x000000000332A000-memory.dmp
          Download

          memory/4796-119-0x0000000005920000-0x0000000005921000-memory.dmp
          Download