Analysis

  • max time kernel
    65s
  • max time network
    68s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    20/11/2022, 20:32

General

  • Target

    file.exe

  • Size

    2.4MB

  • MD5

    7b668440803e4e9e55c2fe7ea57066db

  • SHA1

    dfa2b36a314c7ef56700e955720c9c4f0a6a7d8d

  • SHA256

    5a042f9d24f109b1a9a2a23fb68378dac92c30bbabb037239408f3f3fa92bed2

  • SHA512

    c7bf7c59aeb9534aa0aacac4db62dee6fa8b3a4c350ba781db8a0259120a45aff2b64437a6780347ee3d15c036f2b9a95b183fef733270d55b79e9808a2a71e4

  • SSDEEP

    49152:q2CU3arjtTbLhI3nL44MVvlVLdqE62Q2Gi3X+k9jjdzxbKjJhVavutUxVkBaFwnm:rR3cTK3L44+NeGQ6Xv9FxihVaGtUxVkq

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:364
    • C:\Users\Admin\AppData\Local\Temp\is-L954J.tmp\is-CJ4AN.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-L954J.tmp\is-CJ4AN.tmp" /SL4 $60126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2240260 318464
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1956
      • 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:984
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\nY4hBR6PC.exe
          4⤵
          • Executes dropped EXE
          PID:2036
        • 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:1412
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "gusearcher85.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1992

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          3.2MB

          MD5

          5df6b382dfaba0f2bce400d5ce648e65

          SHA1

          68a345a0b16251d9f1548bf1b491f3287fe51db0

          SHA256

          9b0e2f759366e650d66c5a293eda8bb4f37b4d17129a6c564ec9b04843abcaa4

          SHA512

          5c30e9f1ad3ddd0bea5afcb3282d6dba5c747a3a727e841660b2e2ea20c8511635c84082d0f1ed75544f40dcc23d4109bffdb1fb696419a9545ad003b13f1fa7

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

          Filesize

          3.2MB

          MD5

          5df6b382dfaba0f2bce400d5ce648e65

          SHA1

          68a345a0b16251d9f1548bf1b491f3287fe51db0

          SHA256

          9b0e2f759366e650d66c5a293eda8bb4f37b4d17129a6c564ec9b04843abcaa4

          SHA512

          5c30e9f1ad3ddd0bea5afcb3282d6dba5c747a3a727e841660b2e2ea20c8511635c84082d0f1ed75544f40dcc23d4109bffdb1fb696419a9545ad003b13f1fa7

        • C:\Users\Admin\AppData\Local\Temp\is-L954J.tmp\is-CJ4AN.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Local\Temp\is-L954J.tmp\is-CJ4AN.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\nY4hBR6PC.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

          Filesize

          3.2MB

          MD5

          5df6b382dfaba0f2bce400d5ce648e65

          SHA1

          68a345a0b16251d9f1548bf1b491f3287fe51db0

          SHA256

          9b0e2f759366e650d66c5a293eda8bb4f37b4d17129a6c564ec9b04843abcaa4

          SHA512

          5c30e9f1ad3ddd0bea5afcb3282d6dba5c747a3a727e841660b2e2ea20c8511635c84082d0f1ed75544f40dcc23d4109bffdb1fb696419a9545ad003b13f1fa7

        • \Users\Admin\AppData\Local\Temp\is-L954J.tmp\is-CJ4AN.tmp

          Filesize

          917KB

          MD5

          f4d82ac5ccb900eb1ced5e8b69fac0c7

          SHA1

          b43f8fa853706d5732c4d77b7a509977ebe78ea3

          SHA256

          a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff

          SHA512

          26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c

        • \Users\Admin\AppData\Local\Temp\is-LD0KN.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-LD0KN.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-LD0KN.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\nY4hBR6PC.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/364-65-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/364-87-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/364-55-0x0000000000400000-0x0000000000455000-memory.dmp

          Filesize

          340KB

        • memory/364-54-0x0000000076681000-0x0000000076683000-memory.dmp

          Filesize

          8KB

        • memory/984-71-0x0000000000400000-0x000000000152D000-memory.dmp

          Filesize

          17.2MB

        • memory/984-72-0x0000000000400000-0x000000000152D000-memory.dmp

          Filesize

          17.2MB

        • memory/984-73-0x0000000000400000-0x000000000152D000-memory.dmp

          Filesize

          17.2MB

        • memory/984-86-0x0000000000400000-0x000000000152D000-memory.dmp

          Filesize

          17.2MB

        • memory/984-78-0x0000000000400000-0x000000000152D000-memory.dmp

          Filesize

          17.2MB

        • memory/984-79-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/984-83-0x0000000000400000-0x000000000152D000-memory.dmp

          Filesize

          17.2MB

        • memory/1956-70-0x0000000003260000-0x000000000438D000-memory.dmp

          Filesize

          17.2MB

        • memory/1956-77-0x0000000003260000-0x000000000438D000-memory.dmp

          Filesize

          17.2MB