Analysis

  • max time kernel
    58s
  • max time network
    61s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-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
  • Loads dropped DLL 6 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1256
    • C:\Users\Admin\AppData\Local\Temp\is-CJ9RV.tmp\is-J97VJ.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-CJ9RV.tmp\is-J97VJ.tmp" /SL4 $70124 "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:1932
      • C:\Program Files (x86)\guSearcher\gusearcher85.exe
        "C:\Program Files (x86)\guSearcher\gusearcher85.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1732
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\vTKS97dx1A.exe
          4⤵
          • Executes dropped EXE
          PID:1196
        • 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:296
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "gusearcher85.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:2028

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        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-CJ9RV.tmp\is-J97VJ.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Local\Temp\is-CJ9RV.tmp\is-J97VJ.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\vTKS97dx1A.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

          Filesize

          3.0MB

          MD5

          58cae397aec6f7ffcaafdaec5695941f

          SHA1

          1852d014dfdfcfff8895d419246643eaaf45ebd3

          SHA256

          33f0da2de793d399d1fc234c51985812bb0f2d1d546d377f2c48520180d9bcfa

          SHA512

          d7898f2562fe9d90eb9d498673af5d02116b782491233dfbdeeb2304d0980c0815b2f75f3aa7f8cdd0c39020c77ae4cc5fc5b034678f5aedfcb801219a73486c

        • \Users\Admin\AppData\Local\Temp\is-CJ9RV.tmp\is-J97VJ.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • \Users\Admin\AppData\Local\Temp\is-K9GTU.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-K9GTU.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-K9GTU.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\vTKS97dx1A.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1256-87-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/1256-69-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/1256-55-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/1256-54-0x0000000075091000-0x0000000075093000-memory.dmp

          Filesize

          8KB

        • memory/1732-71-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1732-73-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1732-72-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1732-77-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1732-82-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1732-83-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1732-86-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1932-81-0x0000000003120000-0x0000000004220000-memory.dmp

          Filesize

          17.0MB

        • memory/1932-70-0x0000000003120000-0x0000000004220000-memory.dmp

          Filesize

          17.0MB