Analysis

  • max time kernel
    91s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/11/2022, 19:16

General

  • Target

    file.exe

  • Size

    2.3MB

  • MD5

    3cdfed9d6debd4a264bc134051876e17

  • SHA1

    9cf41b22a33d126055fbb445eb9d3f4b244b276a

  • SHA256

    a3fa57d6f4ad20271316af34f697a8c4c07ce734bda1900f0f11dd10a3ea2cad

  • SHA512

    2df8943933197715860153255319db344db84bd41c3147cb814c2be418716c565a67e17e502204afa264885bf5ee22545acfe1e66d2c79ed564a01c233b2d2d6

  • SSDEEP

    49152:q2th79YplIG26JrlqqOU31I5i6ovrjoql+ESjvvnWLPUxVkBaFwnm:r/79QlIG/TPIEDoQ+xjvvnKUxVkB04m

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 12 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:2992
    • C:\Users\Admin\AppData\Local\Temp\is-JQOA9.tmp\is-68HID.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-JQOA9.tmp\is-68HID.tmp" /SL4 $E0056 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2100927 318464
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1988
      • C:\Program Files (x86)\guSearcher\gusearcher85.exe
        "C:\Program Files (x86)\guSearcher\gusearcher85.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:4880
        • C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\pP2sqT9H.exe
          4⤵
          • Executes dropped EXE
          PID:1332
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "gusearcher85.exe" /f & erase "C:\Program Files (x86)\guSearcher\gusearcher85.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4532
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "gusearcher85.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1960

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Program Files (x86)\guSearcher\gusearcher85.exe

          Filesize

          3.0MB

          MD5

          58cae397aec6f7ffcaafdaec5695941f

          SHA1

          1852d014dfdfcfff8895d419246643eaaf45ebd3

          SHA256

          33f0da2de793d399d1fc234c51985812bb0f2d1d546d377f2c48520180d9bcfa

          SHA512

          d7898f2562fe9d90eb9d498673af5d02116b782491233dfbdeeb2304d0980c0815b2f75f3aa7f8cdd0c39020c77ae4cc5fc5b034678f5aedfcb801219a73486c

        • C:\Program Files (x86)\guSearcher\gusearcher85.exe

          Filesize

          3.0MB

          MD5

          58cae397aec6f7ffcaafdaec5695941f

          SHA1

          1852d014dfdfcfff8895d419246643eaaf45ebd3

          SHA256

          33f0da2de793d399d1fc234c51985812bb0f2d1d546d377f2c48520180d9bcfa

          SHA512

          d7898f2562fe9d90eb9d498673af5d02116b782491233dfbdeeb2304d0980c0815b2f75f3aa7f8cdd0c39020c77ae4cc5fc5b034678f5aedfcb801219a73486c

        • C:\Users\Admin\AppData\Local\Temp\is-JQOA9.tmp\is-68HID.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Local\Temp\is-JQOA9.tmp\is-68HID.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

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

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\pP2sqT9H.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\pP2sqT9H.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/2992-137-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/2992-156-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/2992-132-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/4880-143-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/4880-148-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/4880-152-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/4880-144-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/4880-154-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/4880-142-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB