Analysis

  • max time kernel
    138s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    13/12/2021, 18:07

General

  • Target
    Insurance Renewal.xlsm
  • Size 291KB
  • Sample211213-wqa3eafbdk
  • SHA256 7797c21f3ff516efe2b7b8bb00dbe9aceec4ac9b3a742763b3745b2608d5ded3
  • MD5 SHA1 SHA512

Malware Config

Extracted

Language
  • xlm4.0

Source

Extracted

Family
  • dridex

Botnet
  • 22201

C2
  • 104.36.167.47:443

  • 188.40.48.93:4664

  • 162.241.33.132:9217

  • 217.160.5.104:593

rc4.plain
rc4.plain

Signatures

  • Dridex

    Dridex(known as Bugat/Cridex) is a form of malware that specializes in stealing bank credentials.

  • Process spawned unexpected child process 2 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Dridex Loader 1 IoCs

    Detects Dridex both x86 and x64 loader in memory.

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 1 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 40 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Insurance Renewal.xlsm"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1700
    • C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\System32\explorer.exe" C:\ProgramData\OZzaYEzrIjBfnvlBrheAgi.vbs
      2⤵
      • Process spawned unexpected child process
      PID:2024
  • C:\Windows\explorer.exe
    C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:856
    • C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\ProgramData\OZzaYEzrIjBfnvlBrheAgi.vbs"
      2⤵
      • Blocklisted process makes network request
      • Suspicious use of WriteProcessMemory
      PID:532
      • C:\Windows\System32\Wbem\wmic.exe
        wmic process call create "regsvr32.exe /s C:\\ProgramData\hknigger.bin"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:540
  • C:\Windows\system32\regsvr32.exe
    regsvr32.exe /s C:\\ProgramData\hknigger.bin
    1⤵
    • Process spawned unexpected child process
    • Suspicious use of WriteProcessMemory
    PID:1744
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\\ProgramData\hknigger.bin
      2⤵
      • Loads dropped DLL
      PID:1724

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/856-62-0x000007FEFBF31000-0x000007FEFBF33000-memory.dmp

        memory/1700-56-0x0000000071751000-0x0000000071753000-memory.dmp

        memory/1700-57-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1700-55-0x000000002FAB1000-0x000000002FAB4000-memory.dmp

        memory/1700-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1724-71-0x0000000074AF0000-0x0000000074B75000-memory.dmp

        memory/1724-73-0x0000000000170000-0x0000000000176000-memory.dmp

        memory/2024-60-0x000000006C651000-0x000000006C653000-memory.dmp

        memory/2024-59-0x00000000758A1000-0x00000000758A3000-memory.dmp