Analysis

  • max time kernel
    148s
  • max time network
    112s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    09-05-2022 05:27

General

  • Target

    ApplicationReject-592795800.xlsb

  • Size

    1.1MB

  • MD5

    f1b3eff3172943f758ecdccab14bde37

  • SHA1

    549d2e0da7be834568829a1f61466c2cd6a67874

  • SHA256

    22ea87c8576e4ff3d7da2b467efe4a06d9ebd745e1eaa00dcd8d209930809b89

  • SHA512

    272e6e86e0cdab2e9e2f8e0827cc3bc65f342b1a11c106dfe7c76f0368de7f5d89e946eec670dc24c9bbe81f1d3bfefa944bef8f59bf9346227bb2974824613e

Score
10/10

Malware Config

Extracted

Language
xlm4.0
Source
URLs
xlm40.dropper

http://103.155.93.53/699980913.dat

xlm40.dropper

http://87.236.146.69/699980913.dat

xlm40.dropper

http://94.140.114.172/699980913.dat

Signatures

  • Process spawned unexpected child process 4 IoCs

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

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 28 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\ApplicationReject-592795800.xlsb
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\Windows\SysWOW64\Regsvr32.exe
      Regsvr32 /s calc
      2⤵
      • Process spawned unexpected child process
      PID:1116
    • C:\Windows\SysWOW64\Regsvr32.exe
      Regsvr32 C:\Rujiky\Ubada\Vertu.ooccxx
      2⤵
      • Process spawned unexpected child process
      PID:1212
    • C:\Windows\SysWOW64\Regsvr32.exe
      Regsvr32 C:\Rujiky\Ubada\Vertua.ooccxx
      2⤵
      • Process spawned unexpected child process
      PID:1048
    • C:\Windows\SysWOW64\Regsvr32.exe
      Regsvr32 C:\Rujiky\Ubada\Vertub.ooccxx
      2⤵
      • Process spawned unexpected child process
      PID:616

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/616-65-0x0000000000000000-mapping.dmp
  • memory/1048-63-0x0000000000000000-mapping.dmp
  • memory/1116-59-0x0000000000000000-mapping.dmp
  • memory/1212-61-0x0000000000000000-mapping.dmp
  • memory/1972-54-0x000000002F221000-0x000000002F224000-memory.dmp
    Filesize

    12KB

  • memory/1972-55-0x0000000071B91000-0x0000000071B93000-memory.dmp
    Filesize

    8KB

  • memory/1972-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1972-57-0x0000000072B7D000-0x0000000072B88000-memory.dmp
    Filesize

    44KB

  • memory/1972-58-0x0000000075F21000-0x0000000075F23000-memory.dmp
    Filesize

    8KB