Overview

overview

8

Static

static

4b7eca900b...43.exe

windows7_x64

8

4b7eca900b...43.exe

windows10_x64

8

Analysis

  • max time kernel
    142s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    04/12/2021, 01:37

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General

  • Target
    4b7eca900bf1168ce118043148e1ea43.exe
  • Size 379KB
  • Sample211204-b1tx2scfa5
  • SHA256 500fac9441ad73605875e83b17b9d116ef8e016131f7e5dc19ae0a2ebbf701ea
  • MD5 SHA1 SHA512
Score
8/10

Malware Config

Signatures

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • autoit_exe 3 IoCs

    AutoIT scripts compiled to PE executables.

  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
    evasion
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4b7eca900bf1168ce118043148e1ea43.exe
    "C:\Users\Admin\AppData\Local\Temp\4b7eca900bf1168ce118043148e1ea43.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1696
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\5323291289.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2000
      • C:\Users\Admin\AppData\Local\Temp\5323291289.exe
        "C:\Users\Admin\AppData\Local\Temp\5323291289.exe"
        3⤵
        • Executes dropped EXE
        PID:1924
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "4b7eca900bf1168ce118043148e1ea43.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\4b7eca900bf1168ce118043148e1ea43.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1996
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "4b7eca900bf1168ce118043148e1ea43.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1260

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1696-55-0x00000000005EB000-0x0000000000615000-memory.dmp
        Download

        memory/1696-56-0x0000000075D01000-0x0000000075D03000-memory.dmp
        Download

        memory/1696-57-0x0000000000220000-0x000000000026A000-memory.dmp
        Download

        memory/1696-58-0x0000000000400000-0x0000000000466000-memory.dmp
        Download