Analysis

  • max time kernel
    88s
  • max time network
    130s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/11/2022, 19:32

General

  • Target

    file.exe

  • Size

    2.1MB

  • MD5

    559cbb9a323fc29b39715cbdbc480f8e

  • SHA1

    46b801aab6afb6e901a575afe4175d2df7e922a6

  • SHA256

    1388b3bbc6ddd08cef82882644255b59520371edce6480d254e8b7b6d1e38103

  • SHA512

    7f2598d743bd47e317660076dc19bfacd37d462fd11290b8f610158b116f821a8235f11d68336f49a3dd4625fa5aaf1078e8cef85504116dee5f519497146702

  • SSDEEP

    49152:q2K3jyF7YRtTBCWbLp3k8ANvZG52TUokLgyhrDs3yHfRx7Pq2:rlQTBCWR0HNO8UokdhvsiPD

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:5048
    • C:\Users\Admin\AppData\Local\Temp\is-4V88M.tmp\is-ON84D.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-4V88M.tmp\is-ON84D.tmp" /SL4 $8006A "C:\Users\Admin\AppData\Local\Temp\file.exe" 1985487 54784
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:4908
      • C:\Program Files (x86)\grSearcher\grsearcher83.exe
        "C:\Program Files (x86)\grSearcher\grsearcher83.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1008
        • C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\EqKq51NMM.exe
          4⤵
          • Executes dropped EXE
          PID:3156
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "grsearcher83.exe" /f & erase "C:\Program Files (x86)\grSearcher\grsearcher83.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1356
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "grsearcher83.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:4836

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\grSearcher\grsearcher83.exe

          Filesize

          3.0MB

          MD5

          fa5aef53443b1833d4f156da3bcd028b

          SHA1

          29eeeee9c362b32430521c2face6f71a02c7de40

          SHA256

          59d1ca95a074360e1b01d7889c1653defe0d2ba25a517226a5697d2f05c05042

          SHA512

          f8f1ac955d5d7aeb1993b6c82741f8f2f4e503bc17b396fe9a89ec4523a7f6b96fc93b2d878334751a7c01efc0d253c7e9c7e7746aa0308ce97b28cc45c6df4c

        • C:\Program Files (x86)\grSearcher\grsearcher83.exe

          Filesize

          3.0MB

          MD5

          fa5aef53443b1833d4f156da3bcd028b

          SHA1

          29eeeee9c362b32430521c2face6f71a02c7de40

          SHA256

          59d1ca95a074360e1b01d7889c1653defe0d2ba25a517226a5697d2f05c05042

          SHA512

          f8f1ac955d5d7aeb1993b6c82741f8f2f4e503bc17b396fe9a89ec4523a7f6b96fc93b2d878334751a7c01efc0d253c7e9c7e7746aa0308ce97b28cc45c6df4c

        • C:\Users\Admin\AppData\Local\Temp\is-4V88M.tmp\is-ON84D.tmp

          Filesize

          659KB

          MD5

          34a3efb47055787f7a4537fb08fb93ec

          SHA1

          7396195a1bc60f31bb90b5c8abf4b4ce95ec06f9

          SHA256

          fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409

          SHA512

          055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff

        • C:\Users\Admin\AppData\Local\Temp\is-4V88M.tmp\is-ON84D.tmp

          Filesize

          659KB

          MD5

          34a3efb47055787f7a4537fb08fb93ec

          SHA1

          7396195a1bc60f31bb90b5c8abf4b4ce95ec06f9

          SHA256

          fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409

          SHA512

          055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff

        • C:\Users\Admin\AppData\Local\Temp\is-RTL6H.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\EqKq51NMM.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\EqKq51NMM.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1008-151-0x0000000000400000-0x00000000014FA000-memory.dmp

          Filesize

          17.0MB

        • memory/1008-142-0x0000000000400000-0x00000000014FA000-memory.dmp

          Filesize

          17.0MB

        • memory/1008-143-0x0000000000400000-0x00000000014FA000-memory.dmp

          Filesize

          17.0MB

        • memory/1008-147-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1008-154-0x0000000000400000-0x00000000014FA000-memory.dmp

          Filesize

          17.0MB

        • memory/5048-138-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/5048-132-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/5048-155-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB