Analysis

  • max time kernel
    28s
  • max time network
    31s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    29/12/2022, 12:13

General

  • Target

    4f8aaa32c25c0df6e6d6b07147fe2210.exe

  • Size

    396KB

  • MD5

    4f8aaa32c25c0df6e6d6b07147fe2210

  • SHA1

    6a3d3cc1440dc5ccd401dcad9f2aa2b5e58efb6a

  • SHA256

    3130ae5c7eb9359f37503eae4d9e163031db1cf5cf39b1cf353fefda5e037ed8

  • SHA512

    a46d34e735d5953c006c0507d2d76f626a056981ad71052987632016c0512d3b9cbaa0e5efdd9f2230e2b3f218890c2095f44ab9d248be2b7eac7eedbfb2496a

  • SSDEEP

    6144:+UfKLfKeWByzgwsVqNGIxg4l2wjJFLDk9iGce6o1Yf67k13bwZ4Vxq:dC2eDzgXVeGIxg4XjJlm6o1Yy7

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\4f8aaa32c25c0df6e6d6b07147fe2210.exe
    "C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1784
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "4f8aaa32c25c0df6e6d6b07147fe2210.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:592
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "4f8aaa32c25c0df6e6d6b07147fe2210.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:608

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1784-54-0x00000000767F1000-0x00000000767F3000-memory.dmp

    Filesize

    8KB

  • memory/1784-55-0x000000000055A000-0x0000000000580000-memory.dmp

    Filesize

    152KB

  • memory/1784-56-0x0000000000220000-0x0000000000260000-memory.dmp

    Filesize

    256KB

  • memory/1784-57-0x0000000000400000-0x0000000000468000-memory.dmp

    Filesize

    416KB

  • memory/1784-59-0x0000000000400000-0x0000000000468000-memory.dmp

    Filesize

    416KB