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Analysis

  • max time kernel
    56s
  • max time network
    60s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    10/10/2022, 10:06

General

  • Target

    file.exe

  • Size

    406KB

  • MD5

    55c0f803a6f225c8d99cf5649bcde8a2

  • SHA1

    e4235a1a602a4e1bc2ff3b8fe6d1eece837c6d46

  • SHA256

    8ec72faef5f0fcd1c8b3c5371eb3f9bd8beeefa034f7fc4750168df49e35a69f

  • SHA512

    0f51225afbcdf0322442dadcd916e68ad0a1673ae1b64df0354c1e3c938aacb54b2e4c69ed8e01ca57d27b7466f1d1bfa90bebe58fdb629250addc63c749768a

  • SSDEEP

    6144:pn0aK52xZ86pYYyaihvjhbetJNk8Dy2i16kK0gLQmPC6nCrwVfquS:pnw52k6pYGiLetJS2iIkTNYVnCd

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

208.67.104.97

85.31.46.167

Signatures

  • NyMaim

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

  • Executes dropped EXE 1 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 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 behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1348
    • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\9xnHOa5ZGTcRp.exe
      2⤵
      • Executes dropped EXE
      PID:1644
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1476
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im "file.exe" /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1332

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\9xnHOa5ZGTcRp.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\9xnHOa5ZGTcRp.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/1348-54-0x0000000075601000-0x0000000075603000-memory.dmp

    Filesize

    8KB

  • memory/1348-56-0x0000000001C50000-0x0000000001CA3000-memory.dmp

    Filesize

    332KB

  • memory/1348-55-0x00000000002EA000-0x000000000031A000-memory.dmp

    Filesize

    192KB

  • memory/1348-57-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

  • memory/1348-61-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/1348-65-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB

  • memory/1348-67-0x0000000000400000-0x000000000046B000-memory.dmp

    Filesize

    428KB