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Analysis

  • max time kernel
    91s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/01/2023, 13:46

General

  • Target

    file.exe

  • Size

    1.9MB

  • MD5

    397a6922492b6e5a87b23a680e2354b3

  • SHA1

    d01e7dafacc52ec63514d1785621c39a24b2e6b9

  • SHA256

    8630082c70d58cc65df76196386ba052ef69e0b6088e146ffdfa7d3e96db69d4

  • SHA512

    d1389799c35aec0a9e99f823ebb03c0dbd68c40a719ad03d1bbc2c9a3050e5c24137c586ec6ec7618edfc8217934fbfa8cece64f42c238388ef4e4e6b3a3f741

  • SSDEEP

    49152:y2+pBHTma7oWoh287AuaQGyw3A6a2B5Ro2QnL5SvXpI/m/WahOVLH:jSma83h2wAmGygrtgLK/JhOVLH

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.

  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 17 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2136
    • C:\Users\Admin\AppData\Local\Temp\is-1E41S.tmp\file.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-1E41S.tmp\file.tmp" /SL5="$601D4,1687659,162304,C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:2680
      • C:\Program Files (x86)\Split Files\HitFiles134.exe
        "C:\Program Files (x86)\Split Files\HitFiles134.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4372
        • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\HA7hNYjT5GC.exe
          4⤵
          • Executes dropped EXE
          PID:2396
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "HitFiles134.exe" /f & erase "C:\Program Files (x86)\Split Files\HitFiles134.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:540
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "HitFiles134.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:3720

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Split Files\HitFiles134.exe

    Filesize

    3.2MB

    MD5

    4abc99d015b5b97550b2a41dbde3983b

    SHA1

    326aacf9ba1cea9638779c78b643c65681bc684d

    SHA256

    03306860008b62c7be4eabde37f14b5fff7ef5da796d88d3e08123a3d8e8f2f6

    SHA512

    0249ca079ee1636541db8ddaa82217c73393aad31edc4350a6ed8b9a3ca736a8ddcebe964c4995e0e10521358fc2e67afc855967f8b4f8eecb1f947d030e1a41

  • C:\Program Files (x86)\Split Files\HitFiles134.exe

    Filesize

    3.2MB

    MD5

    4abc99d015b5b97550b2a41dbde3983b

    SHA1

    326aacf9ba1cea9638779c78b643c65681bc684d

    SHA256

    03306860008b62c7be4eabde37f14b5fff7ef5da796d88d3e08123a3d8e8f2f6

    SHA512

    0249ca079ee1636541db8ddaa82217c73393aad31edc4350a6ed8b9a3ca736a8ddcebe964c4995e0e10521358fc2e67afc855967f8b4f8eecb1f947d030e1a41

  • C:\Users\Admin\AppData\Local\Temp\is-1E41S.tmp\file.tmp

    Filesize

    800KB

    MD5

    7013a53c5472267941844ed17de4de3c

    SHA1

    dda886aa81995da2abb763969bba86e82988db1a

    SHA256

    9897aed9da44b8a3c7d7cdeac2fdf2281bcd024846c77d45bc84b973abddc81e

    SHA512

    6b1e8845ffeda2a775370a89aaf7e7477cd6264df15da3cc7e412c282e0ccfb3719d6b08fc65190e61ec9674f5f527d939d9cd50ff9f29af37a049d04596060d

  • C:\Users\Admin\AppData\Local\Temp\is-1E41S.tmp\file.tmp

    Filesize

    800KB

    MD5

    7013a53c5472267941844ed17de4de3c

    SHA1

    dda886aa81995da2abb763969bba86e82988db1a

    SHA256

    9897aed9da44b8a3c7d7cdeac2fdf2281bcd024846c77d45bc84b973abddc81e

    SHA512

    6b1e8845ffeda2a775370a89aaf7e7477cd6264df15da3cc7e412c282e0ccfb3719d6b08fc65190e61ec9674f5f527d939d9cd50ff9f29af37a049d04596060d

  • C:\Users\Admin\AppData\Local\Temp\is-AU0SA.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\HA7hNYjT5GC.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\HA7hNYjT5GC.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/2136-138-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/2136-155-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/2136-132-0x0000000000400000-0x000000000042F000-memory.dmp

    Filesize

    188KB

  • memory/4372-143-0x0000000000400000-0x000000000152D000-memory.dmp

    Filesize

    17.2MB

  • memory/4372-151-0x0000000000400000-0x000000000152D000-memory.dmp

    Filesize

    17.2MB

  • memory/4372-147-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/4372-142-0x0000000000400000-0x000000000152D000-memory.dmp

    Filesize

    17.2MB

  • memory/4372-154-0x0000000000400000-0x000000000152D000-memory.dmp

    Filesize

    17.2MB