Analysis

  • max time kernel
    52s
  • max time network
    54s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    20/11/2022, 18:48

General

  • Target

    file.exe

  • Size

    2.2MB

  • MD5

    f1b4b5cb154d5f463c0ef1076c405319

  • SHA1

    493a432a07537b4a4348320a4f75f50aee7727ba

  • SHA256

    ec96cd51c61b92da5164b561a0452bc4eb55670d5a4899d614e41bdd7413ae60

  • SHA512

    26a70fb17d176200aa03767f5a55d2498d444c424608e2c9507c14a207d8fd263d36b74159820228e37bed322eaef32e898d5acde7fd28ce752751319f129e61

  • SSDEEP

    49152:q2RMD1ICUAsklC9pUZFU6MVz/frtaVfggYdtqUv7UxVkBaFwnm:rwLUAscCQXbmBaJgh7bUxVkB04m

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:2044
    • C:\Users\Admin\AppData\Local\Temp\is-1ACKR.tmp\is-M75OC.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-1ACKR.tmp\is-M75OC.tmp" /SL4 $7012C "C:\Users\Admin\AppData\Local\Temp\file.exe" 2072366 318464
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:2040
      • 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:1176
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\i99r3xe.exe
          4⤵
          • Executes dropped EXE
          PID:1336
        • 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:564
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "gusearcher85.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1936

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          3.0MB

          MD5

          f7b7453aeeda424568ca169cf33adb5c

          SHA1

          fdaff6fbde28e1cd842a1a4d62e929f6320f6eb5

          SHA256

          8b35d1536d0eaefb5ca9a05503b58875860fdb2634c4cddb1247aff58fd1c53e

          SHA512

          fa212edab5bf789466bf87092c0f5cef3868eea6510ead6ed078da708e3a69f6cff2762440997e11ca0efe8e088d71e8b9a95ba08210719c3c9863f1b57ee080

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

          Filesize

          3.0MB

          MD5

          f7b7453aeeda424568ca169cf33adb5c

          SHA1

          fdaff6fbde28e1cd842a1a4d62e929f6320f6eb5

          SHA256

          8b35d1536d0eaefb5ca9a05503b58875860fdb2634c4cddb1247aff58fd1c53e

          SHA512

          fa212edab5bf789466bf87092c0f5cef3868eea6510ead6ed078da708e3a69f6cff2762440997e11ca0efe8e088d71e8b9a95ba08210719c3c9863f1b57ee080

        • C:\Users\Admin\AppData\Local\Temp\is-1ACKR.tmp\is-M75OC.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Local\Temp\is-1ACKR.tmp\is-M75OC.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\i99r3xe.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

          Filesize

          3.0MB

          MD5

          f7b7453aeeda424568ca169cf33adb5c

          SHA1

          fdaff6fbde28e1cd842a1a4d62e929f6320f6eb5

          SHA256

          8b35d1536d0eaefb5ca9a05503b58875860fdb2634c4cddb1247aff58fd1c53e

          SHA512

          fa212edab5bf789466bf87092c0f5cef3868eea6510ead6ed078da708e3a69f6cff2762440997e11ca0efe8e088d71e8b9a95ba08210719c3c9863f1b57ee080

        • \Users\Admin\AppData\Local\Temp\is-0KMKN.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-0KMKN.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-0KMKN.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-1ACKR.tmp\is-M75OC.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\i99r3xe.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1176-71-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1176-82-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1176-85-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1176-72-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1176-73-0x0000000000400000-0x0000000001500000-memory.dmp

          Filesize

          17.0MB

        • memory/1176-77-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/2040-81-0x0000000003260000-0x0000000004360000-memory.dmp

          Filesize

          17.0MB

        • memory/2040-70-0x0000000003260000-0x0000000004360000-memory.dmp

          Filesize

          17.0MB

        • memory/2044-65-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/2044-54-0x00000000767F1000-0x00000000767F3000-memory.dmp

          Filesize

          8KB

        • memory/2044-86-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/2044-55-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB