Analysis

  • max time kernel
    43s
  • max time network
    45s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29/12/2022, 12:17

General

  • Target

    8cb2f80304f1f188fb8769e9ba089a1f.exe

  • Size

    318KB

  • MD5

    8cb2f80304f1f188fb8769e9ba089a1f

  • SHA1

    e3f3542bafcfb7b7efba45ccb719e607ff462d9c

  • SHA256

    f3a7d831c9fa8577a6dffae63ca18f8c05274b49a5a0f3a6091165fe1a212d85

  • SHA512

    cf4f6db594e2b7da74b66d4b874988ed52bbe3914bc2d180ecb72d38d19fe89472d1cd6739bff0379772f2d321a0eb2427f25d12ea81b236692690a599b5c090

  • SSDEEP

    6144:i0LTNZRJ5OkhT01z2Qnn+FfYcbdhA3xqMVi3tm:FPVOkm1z2s+vdAqii3tm

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Deletes itself 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe
    "C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1808
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "8cb2f80304f1f188fb8769e9ba089a1f.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1996
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "8cb2f80304f1f188fb8769e9ba089a1f.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1780

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1808-54-0x0000000076171000-0x0000000076173000-memory.dmp

    Filesize

    8KB

  • memory/1808-56-0x000000000064B000-0x0000000000672000-memory.dmp

    Filesize

    156KB

  • memory/1808-57-0x0000000000220000-0x0000000000260000-memory.dmp

    Filesize

    256KB

  • memory/1808-58-0x0000000000400000-0x0000000000473000-memory.dmp

    Filesize

    460KB