Analysis

  • max time kernel
    41s
  • 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, 12:15

General

  • Target

    3a4fc843fea55ee700af9ca739e690e0.exe

  • Size

    371KB

  • MD5

    3a4fc843fea55ee700af9ca739e690e0

  • SHA1

    355974b4c3165312c59afda5f1f11224b73e25dc

  • SHA256

    80e0fad3bd2c2640bcb4aa073e7195a8fac77ac92b1085ca71cf975da3de6f9d

  • SHA512

    9d218a6f8f59674db9fa3ee433685b215cd8902eab33efb2dead60e0901be3a57199a4ee710b5ab2894f3cc241e591f05a78394f6089e8b36208ce4b91d6c6c9

  • SSDEEP

    6144:KOUR7L0Nr4NBsR1JjXjOvlNW62F5grTPPw7n1HbwZoV0J:mBgUsRHgde5Iw7

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\3a4fc843fea55ee700af9ca739e690e0.exe
    "C:\Users\Admin\AppData\Local\Temp\3a4fc843fea55ee700af9ca739e690e0.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2044
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "3a4fc843fea55ee700af9ca739e690e0.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\3a4fc843fea55ee700af9ca739e690e0.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:584
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "3a4fc843fea55ee700af9ca739e690e0.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:468

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/2044-54-0x0000000075F81000-0x0000000075F83000-memory.dmp

    Filesize

    8KB

  • memory/2044-55-0x00000000005FA000-0x0000000000620000-memory.dmp

    Filesize

    152KB

  • memory/2044-56-0x0000000000250000-0x0000000000290000-memory.dmp

    Filesize

    256KB

  • memory/2044-57-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2044-59-0x00000000005FA000-0x0000000000620000-memory.dmp

    Filesize

    152KB

  • memory/2044-60-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB