Analysis

  • max time kernel
    59s
  • max time network
    61s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    20/11/2022, 18:18

General

  • Target

    file.exe

  • Size

    2.4MB

  • MD5

    db4215d7a3d2a4f3b54b9b3000cb427a

  • SHA1

    ff391addbbe3dd1a500ad2952e4f9efa1253491c

  • SHA256

    430d629d8fbd8d716f6d23bfd081da8d6844a131b05a0c5d377916dc03524025

  • SHA512

    2ba973c3199d65fec9410237eeabfaca9d93e8e4b17e4f5f6f7d272b201b70780e58e66b4b7cff327ccddb940b91f9129d49ddd69da73394b8597880e6ac558c

  • SSDEEP

    49152:q2NUJWWcWwAHXUy+D+88QRLCYChKDBGZQB7qnwpCPTUxVkBaFwnm:rNUJWveHkt+c0WGZQRiwMLUxVkB04m

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:1908
    • C:\Users\Admin\AppData\Local\Temp\is-VRHUC.tmp\is-OC20I.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-VRHUC.tmp\is-OC20I.tmp" /SL4 $60158 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2254408 318464
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1952
      • 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:1740
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RzLKr.exe
          4⤵
          • Executes dropped EXE
          PID:1992
        • 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:1508
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "gusearcher85.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1200

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          3.2MB

          MD5

          352615223aa0e14658a812ed4df3d6ab

          SHA1

          971c2ab164de6b88a89f60b8f4943764224d5ad2

          SHA256

          271ba208c1739ba6a10849de9577c1260b7eebcc68372afa0d7f0e44b5ccf57a

          SHA512

          839a2eed55022577864cc16905aa0208869b25d40edee5cb4bc6acf97003099294871a4313f29704d2aee2a65b48afcd0888a9138b9dcabcf7a7e5fe6680e771

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

          Filesize

          3.2MB

          MD5

          352615223aa0e14658a812ed4df3d6ab

          SHA1

          971c2ab164de6b88a89f60b8f4943764224d5ad2

          SHA256

          271ba208c1739ba6a10849de9577c1260b7eebcc68372afa0d7f0e44b5ccf57a

          SHA512

          839a2eed55022577864cc16905aa0208869b25d40edee5cb4bc6acf97003099294871a4313f29704d2aee2a65b48afcd0888a9138b9dcabcf7a7e5fe6680e771

        • C:\Users\Admin\AppData\Local\Temp\is-VRHUC.tmp\is-OC20I.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Local\Temp\is-VRHUC.tmp\is-OC20I.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

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

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

          Filesize

          3.2MB

          MD5

          352615223aa0e14658a812ed4df3d6ab

          SHA1

          971c2ab164de6b88a89f60b8f4943764224d5ad2

          SHA256

          271ba208c1739ba6a10849de9577c1260b7eebcc68372afa0d7f0e44b5ccf57a

          SHA512

          839a2eed55022577864cc16905aa0208869b25d40edee5cb4bc6acf97003099294871a4313f29704d2aee2a65b48afcd0888a9138b9dcabcf7a7e5fe6680e771

        • \Users\Admin\AppData\Local\Temp\is-LD1RR.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-LD1RR.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-LD1RR.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-VRHUC.tmp\is-OC20I.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

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

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1740-71-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/1740-83-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/1740-72-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/1740-73-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/1740-86-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/1740-82-0x0000000000400000-0x0000000001532000-memory.dmp

          Filesize

          17.2MB

        • memory/1740-77-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1908-68-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/1908-54-0x00000000753C1000-0x00000000753C3000-memory.dmp

          Filesize

          8KB

        • memory/1908-87-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/1908-55-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/1952-81-0x0000000003280000-0x00000000043B2000-memory.dmp

          Filesize

          17.2MB

        • memory/1952-70-0x0000000003280000-0x00000000043B2000-memory.dmp

          Filesize

          17.2MB