Analysis

  • max time kernel
    148s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    15-01-2022 10:40

General

  • Target

    nn30.xlsm

  • Size

    83KB

  • MD5

    9636f43534938f7dfa6f9662fca03ff8

  • SHA1

    494885b3781fe4adab15e6738a99555a341b4b82

  • SHA256

    1a243db583013a6999761dad88d6952351fdc2cd17d2016990276a9dd11ac90b

  • SHA512

    e1e9e6832eb13fd3d6f22b22be0f3aeb41b662c4c217dd6f2a841b38b71d2c82cc14dbf97a3167c30be56e9838398870349e12196493a49ca21ab166fe1edd63

Score
10/10

Malware Config

Extracted

Language
xlm4.0
Source
URLs
xlm40.dropper

https://zml.laneso.com/packet/AlvJ8OdtSYEeeCQP/

xlm40.dropper

http://ostadsarma.com/wp-admin/JNgASjNC/

Signatures

  • Process spawned unexpected child process 1 IoCs

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

  • Blocklisted process makes network request 4 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 behavior: EnumeratesProcesses 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\nn30.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:1412
    • C:\Windows\SysWow64\rundll32.exe
      C:\Windows\SysWow64\rundll32.exe ..\erum.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1048
      • C:\Windows\SysWOW64\rundll32.exe
        C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\erum.ocx",DllRegisterServer
        3⤵
        • Loads dropped DLL
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:1408
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Tjfqsgwwyqv\qmmojvoxs.zah",UCqajIKhyfw
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1752
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Tjfqsgwwyqv\qmmojvoxs.zah",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1976

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\erum.ocx

    MD5

    893b80ebfbd0e2f5c5dc72bb4091a14e

    SHA1

    d08a60ece78a54860987b92f5c0170d7fa5c54b3

    SHA256

    2dc5a01671a0b64736258b66b49526f55f4985fdab69aa3974fcc753b0dc3f2e

    SHA512

    5938d26ecb9e58de997f3463839143f69f798b83d333c674090a3dd956f643ee60872e0b0024954f83d07f4d3a2ca305b3bf0252c056638077425a6391ac4aae

  • \Users\Admin\erum.ocx

    MD5

    893b80ebfbd0e2f5c5dc72bb4091a14e

    SHA1

    d08a60ece78a54860987b92f5c0170d7fa5c54b3

    SHA256

    2dc5a01671a0b64736258b66b49526f55f4985fdab69aa3974fcc753b0dc3f2e

    SHA512

    5938d26ecb9e58de997f3463839143f69f798b83d333c674090a3dd956f643ee60872e0b0024954f83d07f4d3a2ca305b3bf0252c056638077425a6391ac4aae

  • \Users\Admin\erum.ocx

    MD5

    893b80ebfbd0e2f5c5dc72bb4091a14e

    SHA1

    d08a60ece78a54860987b92f5c0170d7fa5c54b3

    SHA256

    2dc5a01671a0b64736258b66b49526f55f4985fdab69aa3974fcc753b0dc3f2e

    SHA512

    5938d26ecb9e58de997f3463839143f69f798b83d333c674090a3dd956f643ee60872e0b0024954f83d07f4d3a2ca305b3bf0252c056638077425a6391ac4aae

  • memory/1048-63-0x0000000000295000-0x0000000000296000-memory.dmp

    Filesize

    4KB

  • memory/1048-59-0x0000000076851000-0x0000000076853000-memory.dmp

    Filesize

    8KB

  • memory/1048-58-0x0000000000000000-mapping.dmp

  • memory/1048-62-0x0000000000271000-0x0000000000295000-memory.dmp

    Filesize

    144KB

  • memory/1408-67-0x0000000000781000-0x00000000007A5000-memory.dmp

    Filesize

    144KB

  • memory/1408-71-0x0000000000881000-0x00000000008A5000-memory.dmp

    Filesize

    144KB

  • memory/1408-64-0x0000000000000000-mapping.dmp

  • memory/1408-75-0x0000000002531000-0x0000000002555000-memory.dmp

    Filesize

    144KB

  • memory/1408-73-0x0000000001F81000-0x0000000001FA5000-memory.dmp

    Filesize

    144KB

  • memory/1408-69-0x0000000000821000-0x0000000000845000-memory.dmp

    Filesize

    144KB

  • memory/1412-57-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1412-56-0x0000000071B61000-0x0000000071B63000-memory.dmp

    Filesize

    8KB

  • memory/1412-55-0x000000002F9E1000-0x000000002F9E4000-memory.dmp

    Filesize

    12KB

  • memory/1752-77-0x0000000000000000-mapping.dmp

  • memory/1752-79-0x0000000000291000-0x00000000002B5000-memory.dmp

    Filesize

    144KB

  • memory/1976-81-0x0000000000000000-mapping.dmp

  • memory/1976-83-0x0000000000171000-0x0000000000195000-memory.dmp

    Filesize

    144KB

  • memory/1976-85-0x0000000000351000-0x0000000000375000-memory.dmp

    Filesize

    144KB

  • memory/1976-89-0x0000000002431000-0x0000000002455000-memory.dmp

    Filesize

    144KB