Analysis

  • max time kernel
    57s
  • max time network
    59s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    02/01/2023, 09:02

General

  • Target

    file.exe

  • Size

    1.8MB

  • MD5

    935f09d23ee8baee6753e75a540c02ae

  • SHA1

    09b8a5f9a9e5bf405f0a03dfef4516c42aca662f

  • SHA256

    70063b6b7145d57932d8869652d242b9e26975bfd2c05294c610ff16a3617058

  • SHA512

    cbee6fffa363fd4387d9a63cb0c70befec760ccbf767a336de2970af5b06a8e00b0128c9ba9f82e0946828fc612a2ab027f942c9f864821f67b136da7c56e66b

  • SSDEEP

    49152:Mi/04jl6B/hbCb4ZnsXt89vGgjf3lHgwjT1MSBk3M:Mi/zjMxhOy889vGCHglSBk3M

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 10 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 17 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 3 IoCs
  • Suspicious use of WriteProcessMemory 35 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:1204
    • C:\Users\Admin\AppData\Local\Temp\is-SV015.tmp\is-Q31R5.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-SV015.tmp\is-Q31R5.tmp" /SL4 $70122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1629676 93184
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1716
      • C:\Program Files (x86)\Split Files\SplitFiles128.exe
        "C:\Program Files (x86)\Split Files\SplitFiles128.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1048
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5tTZEm.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1700
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles128.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles128.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1608
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles128.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:868

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\Split Files\SplitFiles128.exe

          Filesize

          3.3MB

          MD5

          2bc890de698088097f9d883d5459f638

          SHA1

          edfaa14bd16525b41a1a1a4f9b50bde297eb6ef4

          SHA256

          09b70dcad2fafed0e7d821bf46c4a80ffd4a4996409d2b56e65374370fe2b66c

          SHA512

          b1c884a62486327ee05c139249baadf70ed91b5a8ed9fed26c764510cc9915456b45fa60975da6efdfb60ea4eb4f9a6c803797d7cfd4dada56f3db4c4816b1d3

        • C:\Program Files (x86)\Split Files\SplitFiles128.exe

          Filesize

          3.3MB

          MD5

          2bc890de698088097f9d883d5459f638

          SHA1

          edfaa14bd16525b41a1a1a4f9b50bde297eb6ef4

          SHA256

          09b70dcad2fafed0e7d821bf46c4a80ffd4a4996409d2b56e65374370fe2b66c

          SHA512

          b1c884a62486327ee05c139249baadf70ed91b5a8ed9fed26c764510cc9915456b45fa60975da6efdfb60ea4eb4f9a6c803797d7cfd4dada56f3db4c4816b1d3

        • C:\Users\Admin\AppData\Local\Temp\is-SV015.tmp\is-Q31R5.tmp

          Filesize

          685KB

          MD5

          7f46188bafe719b5ba8e32c2e0037f21

          SHA1

          6dc19d768f6b24766cfcdf49f630b517174c780e

          SHA256

          3c65b17529d5a22bbcb9f726f567f3a0506f6536bc5048789fd2f11c420ffd5e

          SHA512

          5c14cf51850c1e02765e86f7a166e7554425c3399e979ff75397a1c430e1c5099545eddd51e65b06790fb3cc9cbb70b70749438ec3277deba5a0eb4c3beb2bc3

        • C:\Users\Admin\AppData\Local\Temp\is-SV015.tmp\is-Q31R5.tmp

          Filesize

          685KB

          MD5

          7f46188bafe719b5ba8e32c2e0037f21

          SHA1

          6dc19d768f6b24766cfcdf49f630b517174c780e

          SHA256

          3c65b17529d5a22bbcb9f726f567f3a0506f6536bc5048789fd2f11c420ffd5e

          SHA512

          5c14cf51850c1e02765e86f7a166e7554425c3399e979ff75397a1c430e1c5099545eddd51e65b06790fb3cc9cbb70b70749438ec3277deba5a0eb4c3beb2bc3

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5tTZEm.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5tTZEm.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Program Files (x86)\Split Files\SplitFiles128.exe

          Filesize

          3.3MB

          MD5

          2bc890de698088097f9d883d5459f638

          SHA1

          edfaa14bd16525b41a1a1a4f9b50bde297eb6ef4

          SHA256

          09b70dcad2fafed0e7d821bf46c4a80ffd4a4996409d2b56e65374370fe2b66c

          SHA512

          b1c884a62486327ee05c139249baadf70ed91b5a8ed9fed26c764510cc9915456b45fa60975da6efdfb60ea4eb4f9a6c803797d7cfd4dada56f3db4c4816b1d3

        • \Program Files (x86)\Split Files\SplitFiles128.exe

          Filesize

          3.3MB

          MD5

          2bc890de698088097f9d883d5459f638

          SHA1

          edfaa14bd16525b41a1a1a4f9b50bde297eb6ef4

          SHA256

          09b70dcad2fafed0e7d821bf46c4a80ffd4a4996409d2b56e65374370fe2b66c

          SHA512

          b1c884a62486327ee05c139249baadf70ed91b5a8ed9fed26c764510cc9915456b45fa60975da6efdfb60ea4eb4f9a6c803797d7cfd4dada56f3db4c4816b1d3

        • \Program Files (x86)\Split Files\SplitFiles128.exe

          Filesize

          3.3MB

          MD5

          2bc890de698088097f9d883d5459f638

          SHA1

          edfaa14bd16525b41a1a1a4f9b50bde297eb6ef4

          SHA256

          09b70dcad2fafed0e7d821bf46c4a80ffd4a4996409d2b56e65374370fe2b66c

          SHA512

          b1c884a62486327ee05c139249baadf70ed91b5a8ed9fed26c764510cc9915456b45fa60975da6efdfb60ea4eb4f9a6c803797d7cfd4dada56f3db4c4816b1d3

        • \Users\Admin\AppData\Local\Temp\is-J3REN.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-J3REN.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-J3REN.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-SV015.tmp\is-Q31R5.tmp

          Filesize

          685KB

          MD5

          7f46188bafe719b5ba8e32c2e0037f21

          SHA1

          6dc19d768f6b24766cfcdf49f630b517174c780e

          SHA256

          3c65b17529d5a22bbcb9f726f567f3a0506f6536bc5048789fd2f11c420ffd5e

          SHA512

          5c14cf51850c1e02765e86f7a166e7554425c3399e979ff75397a1c430e1c5099545eddd51e65b06790fb3cc9cbb70b70749438ec3277deba5a0eb4c3beb2bc3

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5tTZEm.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5tTZEm.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\5tTZEm.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1048-91-0x0000000000400000-0x0000000001552000-memory.dmp

          Filesize

          17.3MB

        • memory/1048-74-0x0000000000400000-0x0000000001552000-memory.dmp

          Filesize

          17.3MB

        • memory/1048-76-0x0000000000400000-0x0000000001552000-memory.dmp

          Filesize

          17.3MB

        • memory/1048-77-0x0000000000400000-0x0000000001552000-memory.dmp

          Filesize

          17.3MB

        • memory/1048-96-0x0000000000400000-0x0000000001552000-memory.dmp

          Filesize

          17.3MB

        • memory/1048-75-0x0000000001BC0000-0x0000000002D12000-memory.dmp

          Filesize

          17.3MB

        • memory/1048-87-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1048-86-0x0000000000400000-0x0000000001552000-memory.dmp

          Filesize

          17.3MB

        • memory/1204-68-0x0000000000400000-0x000000000041D000-memory.dmp

          Filesize

          116KB

        • memory/1204-55-0x0000000000400000-0x000000000041D000-memory.dmp

          Filesize

          116KB

        • memory/1204-54-0x00000000753F1000-0x00000000753F3000-memory.dmp

          Filesize

          8KB

        • memory/1204-97-0x0000000000400000-0x000000000041D000-memory.dmp

          Filesize

          116KB

        • memory/1716-85-0x0000000003990000-0x0000000004AE2000-memory.dmp

          Filesize

          17.3MB

        • memory/1716-73-0x0000000003990000-0x0000000004AE2000-memory.dmp

          Filesize

          17.3MB