Analysis

  • max time kernel
    43s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29/12/2022, 12:16

General

  • Target

    121c8d638b96a43eb3c2fb623e467536.exe

  • Size

    371KB

  • MD5

    121c8d638b96a43eb3c2fb623e467536

  • SHA1

    51ce2503b96428fd2c647816728e7ba8b97ae1ec

  • SHA256

    3c476ad15acd041a55c25fe36c6eb40b5f4112d3bb5bc36ca1c619a9269c20bc

  • SHA512

    73b076553727885b8d94fd92b9e33e23a4f97d98ec2453be78acda53ebafd6f9a9c11e56be0ef23c87cc535432ab885c03a84b55f25acb80bc2e0928be72fb63

  • SSDEEP

    6144:VkUXaLyOOZ/7mXe5Bm0O7lcd5UcJmL6CKPT9YfYAuw7n1HbwZoV9J:hK2XKO5k0O7mucYOCKb9fAuw7

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\121c8d638b96a43eb3c2fb623e467536.exe
    "C:\Users\Admin\AppData\Local\Temp\121c8d638b96a43eb3c2fb623e467536.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:560
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "121c8d638b96a43eb3c2fb623e467536.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\121c8d638b96a43eb3c2fb623e467536.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:892
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "121c8d638b96a43eb3c2fb623e467536.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:268

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/560-54-0x0000000076041000-0x0000000076043000-memory.dmp

    Filesize

    8KB

  • memory/560-56-0x0000000000220000-0x0000000000260000-memory.dmp

    Filesize

    256KB

  • memory/560-55-0x000000000062A000-0x0000000000650000-memory.dmp

    Filesize

    152KB

  • memory/560-57-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/560-59-0x000000000062A000-0x0000000000650000-memory.dmp

    Filesize

    152KB

  • memory/560-60-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB