Resubmissions

28-02-2021 17:05

210228-pjgnbjwth2 8

27-02-2021 12:13

210227-bpkha5za7s 8

27-02-2021 04:19

210227-7c1xkzg346 10

27-02-2021 03:32

210227-2xwvzgykxs 8

27-02-2021 03:29

210227-qgrlcph782 8

27-02-2021 03:16

210227-k82qfdjlve 8

27-02-2021 02:45

210227-mjxh7bv4wj 8

27-02-2021 02:23

210227-w6qfkjy5ha 8

27-02-2021 02:06

210227-r385kvgs32 8

26-02-2021 23:10

210226-yds8gthfax 8

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    23-02-2021 14:22

General

  • Target

    Doc_3744.xls

  • Size

    62KB

  • MD5

    47e22049644647ee854cedfe077156e7

  • SHA1

    20ad9f47616a8272dece2ec1039a88c09412c97c

  • SHA256

    5f2adacaf4ecb00ed24dd9dfe355307d0d6e786e40c945ad4c6d1ae3a4835d2a

  • SHA512

    1eeb87173378f4d0e157ee42f5b28e48ff84a35b44d71f004a6180cc2bdbc09e45c071adc7ab0a94c75071fbe3ee13b939ee8cb216b6f2e06c9c24ca34dbbf1b

Score
10/10

Malware Config

Extracted

Language
xlm4.0
Source
URLs
xlm40.dropper

https://hrdgschool.com/logs.php

Signatures

  • Process spawned unexpected child process 2 IoCs

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

  • Deletes itself 1 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 14 IoCs
  • Suspicious use of WriteProcessMemory 11 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\Doc_3744.xls
    1⤵
    • Deletes itself
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1832
    • C:\Windows\SysWOW64\reg.exe
      "C:\Windows\system32\reg.exe" EXPORT HKCU\Software\Microsoft\Office\14.0\Excel\Security C:\Users\Public\Documents\icSz4h.txt /y
      2⤵
      • Process spawned unexpected child process
      PID:1292
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\system32\rundll32.exe" C:\Users\Public\Documents\f4myZ.txt,DllRegisterServer
      2⤵
      • Process spawned unexpected child process
      PID:1260

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

  • C:\Users\Public\Documents\f4myZ.txt
    MD5

    6a94bbe7bd7fc8ba685da404a9440006

    SHA1

    48e83c39b373b1d0b1bcf94f57dac0afbd70517b

    SHA256

    5a49c4743ed4e6c66817818cda33bcfb4ce423bffc496129d88980c0b579d859

    SHA512

    f5ee2560c9477c1016c2774a5e384148d1fa7dc15bbaaedf16da0a765228f1e2a997d9315eb7a989019537a65d4e1afaad7784cabd4cbd8130270df8560b0f8a

  • C:\Users\Public\Documents\icSz4h.txt
    MD5

    1084b35cb1aecef496dfdb263760a40c

    SHA1

    43d95f062749f3143838fe39460b3c5d541e194a

    SHA256

    48ccd7a8ed9873ff73eec7252ed9ce2882389aa43a5ec5ad072168c43320b25c

    SHA512

    9dbcfe0f39e04700f252b95cfb73a7977fe7a2ffe8de98510c9f62988300754c4e8eeb0a152ad87db71b28ee8c2fcb97d136215d2898ccbee5b8837a31eb7212

  • memory/1048-9-0x000007FEF7880000-0x000007FEF7AFA000-memory.dmp
    Filesize

    2.5MB

  • memory/1260-10-0x0000000000000000-mapping.dmp
  • memory/1292-7-0x0000000000000000-mapping.dmp
  • memory/1832-2-0x000000002F091000-0x000000002F094000-memory.dmp
    Filesize

    12KB

  • memory/1832-3-0x00000000717F1000-0x00000000717F3000-memory.dmp
    Filesize

    8KB

  • memory/1832-4-0x0000000076371000-0x0000000076373000-memory.dmp
    Filesize

    8KB

  • memory/1832-5-0x000000006D151000-0x000000006D153000-memory.dmp
    Filesize

    8KB

  • memory/1832-6-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB