Analysis

  • max time kernel
    144s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/11/2022, 19:01

General

  • Target

    file.exe

  • Size

    2.0MB

  • MD5

    4e77619a5e7a42bd36adf716701e95be

  • SHA1

    b23cc57112015b136221c7ee3a43f63a67104e2a

  • SHA256

    d52915dfb4d46b9f4a91d0f828d85fb33796fdff7d58c137b2fab68cfa889980

  • SHA512

    6314a6af252e9b4a0b1a2f4be8b3f2e7600f4b8de7e19c13a84b1782027c8078e6f883200e37ddc822a926d0a4eb620a4fa651f43e42202855e12eb6b13990fe

  • SSDEEP

    49152:q2EcBxLykb4ouoTCoEhIOWQFV6o7fyHfRx7Pq2:rEcT+kb4olchFVX7aPD

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 behavior: GetForegroundWindowSpam 1 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:3264
    • C:\Users\Admin\AppData\Local\Temp\is-MNQO8.tmp\is-6N58O.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-MNQO8.tmp\is-6N58O.tmp" /SL4 $801D2 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1799804 54784
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:4820
      • 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 behavior: GetForegroundWindowSpam
        • Suspicious use of WriteProcessMemory
        PID:2616
        • C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\zlMhf52.exe
          4⤵
          • Executes dropped EXE
          PID:4260
        • 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:4728
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "grsearcher83.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:4048

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          2.8MB

          MD5

          4a9101315feaa042501898a516c9231e

          SHA1

          ea7b8b8b17f968dfbdbd6855c3c9bb365ae4d438

          SHA256

          428cdf0c5b694c0bf594ca9f5ab485de2fc41f8e5f8773fed56caa55f584744f

          SHA512

          2e3d764ff8c76d8b43802f989148aa1176bc2d300a8279646bbefa335b2706281cfcf24c7efc9a6a822e3738f0b5edf646dcbc89917a331449afed8db5020287

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

          Filesize

          2.8MB

          MD5

          4a9101315feaa042501898a516c9231e

          SHA1

          ea7b8b8b17f968dfbdbd6855c3c9bb365ae4d438

          SHA256

          428cdf0c5b694c0bf594ca9f5ab485de2fc41f8e5f8773fed56caa55f584744f

          SHA512

          2e3d764ff8c76d8b43802f989148aa1176bc2d300a8279646bbefa335b2706281cfcf24c7efc9a6a822e3738f0b5edf646dcbc89917a331449afed8db5020287

        • C:\Users\Admin\AppData\Local\Temp\is-6I5SH.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-MNQO8.tmp\is-6N58O.tmp

          Filesize

          659KB

          MD5

          34a3efb47055787f7a4537fb08fb93ec

          SHA1

          7396195a1bc60f31bb90b5c8abf4b4ce95ec06f9

          SHA256

          fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409

          SHA512

          055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff

        • C:\Users\Admin\AppData\Local\Temp\is-MNQO8.tmp\is-6N58O.tmp

          Filesize

          659KB

          MD5

          34a3efb47055787f7a4537fb08fb93ec

          SHA1

          7396195a1bc60f31bb90b5c8abf4b4ce95ec06f9

          SHA256

          fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409

          SHA512

          055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff

        • C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\zlMhf52.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{6fe6a3c0-6208-11ed-b8c9-806e6f6e6963}\zlMhf52.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/2616-143-0x0000000000400000-0x00000000014C8000-memory.dmp

          Filesize

          16.8MB

        • memory/2616-155-0x0000000000400000-0x00000000014C8000-memory.dmp

          Filesize

          16.8MB

        • memory/2616-142-0x0000000000400000-0x00000000014C8000-memory.dmp

          Filesize

          16.8MB

        • memory/2616-144-0x0000000000400000-0x00000000014C8000-memory.dmp

          Filesize

          16.8MB

        • memory/2616-148-0x0000000000400000-0x00000000014C8000-memory.dmp

          Filesize

          16.8MB

        • memory/2616-149-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/3264-132-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/3264-137-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/3264-156-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB