Analysis

  • max time kernel
    64s
  • max time network
    67s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    31/10/2022, 22:02

General

  • Target

    file.exe

  • Size

    2.5MB

  • MD5

    35c82d586f59bb4e0072a8a085efff47

  • SHA1

    089024610b0991b00ff314962af4652756cf3628

  • SHA256

    9b85176a686d741d54e05e0f63cc4b9223bf0d43da5c58f919546e0ecd1952e1

  • SHA512

    841f93c1535b5454085728dcc19080fa2c77122fa85eeff55e7483dfc5262948abb9e948b2e23f2d9b0e630a907bcc12241bf2da1764591b0ce51b5b3caf191b

  • SSDEEP

    49152:Z2Y3Hd2PQRigqrImQ5cdbH67+dbyP4Tr70RN7OXWQB9GJXC4+61IuTA5hq:M89aQRTqcmQ5cpaj4TA4mQTGJXCH61IE

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:1100
    • C:\Users\Admin\AppData\Local\Temp\is-8ELS8.tmp\is-IV59S.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-8ELS8.tmp\is-IV59S.tmp" /SL4 $60126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2369099 52736
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of WriteProcessMemory
      PID:1688
      • C:\Program Files (x86)\fhSearcher\fhsearcher65.exe
        "C:\Program Files (x86)\fhSearcher\fhsearcher65.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1272
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eetC0No2.exe
          4⤵
          • Executes dropped EXE
          PID:1940
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "fhsearcher65.exe" /f & erase "C:\Program Files (x86)\fhSearcher\fhsearcher65.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1124
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "fhsearcher65.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1728

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\fhSearcher\fhsearcher65.exe

          Filesize

          3.6MB

          MD5

          8f5f63517718422f797122b415a12f84

          SHA1

          0f39d193f11d161997d14355024840cec94cecf8

          SHA256

          cd0053feb4c9d74501447e7bea0f46527cbf1300fbfd9b7c402c55e028cc3df6

          SHA512

          089d9d56c2fb59609b66814dd29a1546f9b2f87836288addb0d90cb74689070c5e9dee65ae8dca555b8776717983efc49ce2e1bc6d6646fe0a867a19e7d245ed

        • C:\Program Files (x86)\fhSearcher\fhsearcher65.exe

          Filesize

          3.6MB

          MD5

          8f5f63517718422f797122b415a12f84

          SHA1

          0f39d193f11d161997d14355024840cec94cecf8

          SHA256

          cd0053feb4c9d74501447e7bea0f46527cbf1300fbfd9b7c402c55e028cc3df6

          SHA512

          089d9d56c2fb59609b66814dd29a1546f9b2f87836288addb0d90cb74689070c5e9dee65ae8dca555b8776717983efc49ce2e1bc6d6646fe0a867a19e7d245ed

        • C:\Users\Admin\AppData\Local\Temp\is-8ELS8.tmp\is-IV59S.tmp

          Filesize

          657KB

          MD5

          7cd12c54a9751ca6eee6ab0c85fb68f5

          SHA1

          76562e9b7888b6d20d67addb5a90b68b54a51987

          SHA256

          e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

          SHA512

          27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

        • C:\Users\Admin\AppData\Local\Temp\is-8ELS8.tmp\is-IV59S.tmp

          Filesize

          657KB

          MD5

          7cd12c54a9751ca6eee6ab0c85fb68f5

          SHA1

          76562e9b7888b6d20d67addb5a90b68b54a51987

          SHA256

          e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

          SHA512

          27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eetC0No2.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Program Files (x86)\fhSearcher\fhsearcher65.exe

          Filesize

          3.6MB

          MD5

          8f5f63517718422f797122b415a12f84

          SHA1

          0f39d193f11d161997d14355024840cec94cecf8

          SHA256

          cd0053feb4c9d74501447e7bea0f46527cbf1300fbfd9b7c402c55e028cc3df6

          SHA512

          089d9d56c2fb59609b66814dd29a1546f9b2f87836288addb0d90cb74689070c5e9dee65ae8dca555b8776717983efc49ce2e1bc6d6646fe0a867a19e7d245ed

        • \Users\Admin\AppData\Local\Temp\is-8ELS8.tmp\is-IV59S.tmp

          Filesize

          657KB

          MD5

          7cd12c54a9751ca6eee6ab0c85fb68f5

          SHA1

          76562e9b7888b6d20d67addb5a90b68b54a51987

          SHA256

          e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

          SHA512

          27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

        • \Users\Admin\AppData\Local\Temp\is-UF91P.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-UF91P.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-UF91P.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eetC0No2.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1100-55-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/1100-68-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/1100-87-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/1100-54-0x00000000763F1000-0x00000000763F3000-memory.dmp

          Filesize

          8KB

        • memory/1272-79-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1272-75-0x0000000000400000-0x00000000015A2000-memory.dmp

          Filesize

          17.6MB

        • memory/1272-72-0x0000000000400000-0x00000000015A2000-memory.dmp

          Filesize

          17.6MB

        • memory/1272-73-0x0000000000400000-0x00000000015A2000-memory.dmp

          Filesize

          17.6MB

        • memory/1272-83-0x0000000000400000-0x00000000015A2000-memory.dmp

          Filesize

          17.6MB

        • memory/1272-71-0x0000000000400000-0x00000000015A2000-memory.dmp

          Filesize

          17.6MB

        • memory/1272-86-0x0000000000400000-0x00000000015A2000-memory.dmp

          Filesize

          17.6MB

        • memory/1688-74-0x0000000003230000-0x00000000043D2000-memory.dmp

          Filesize

          17.6MB

        • memory/1688-70-0x0000000003230000-0x00000000043D2000-memory.dmp

          Filesize

          17.6MB