Analysis

  • max time kernel
    59s
  • max time network
    61s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    29/12/2022, 08:39

General

  • Target

    file.exe

  • Size

    1.9MB

  • MD5

    9fbb43df1a78855ac47a37d5c4f7c379

  • SHA1

    e5338d88ca19e5ab3c1cc37f553296582920e99c

  • SHA256

    cb918082da7baa66df0ea914cad745f2be2f51774c18130f1752962a8ddce024

  • SHA512

    5017b318822ca80545599e08be01bf23b5366d7aeebbf48fb88b2f88d3042f6e8670184efa00c463abd8efbb4812ac18b69f1dea20b1bad58e8f4208e3f2def8

  • SSDEEP

    24576:SpnisF6lyrTjlj/CcqcJJWiS19XbWrqtr6+UOevmuBGE9g+V7hnK66m6wTp38:QidlglJpS1R7COevmMga7AUNM

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:1744
    • C:\Users\Admin\AppData\Local\Temp\is-4C31G.tmp\is-17EJ7.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-4C31G.tmp\is-17EJ7.tmp" /SL4 $70122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1778809 96768
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1268
      • C:\Program Files (x86)\Split Files\SplitFiles124.exe
        "C:\Program Files (x86)\Split Files\SplitFiles124.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:848
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\zhD0UiLkIp.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1276
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles124.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles124.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1532
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles124.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:812

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Split Files\SplitFiles124.exe

    Filesize

    3.3MB

    MD5

    131a98dec8503f2cf89f6a84281e7055

    SHA1

    0c84432021bd8eb3152158d8dfef5d48be2ebafc

    SHA256

    7147fe48be21df1d030962afbd1e04e80ecc08f6c4977b8d2ac6146cf18055a5

    SHA512

    1242275add0fe5d334f3dcb0c31b4c97cb9a43879bb5fa309d07c823ba41de5af50640cc5f6c92d09d3f880534bfb19994a8d31d881d805e9f4da0a562989be8

  • C:\Program Files (x86)\Split Files\SplitFiles124.exe

    Filesize

    3.3MB

    MD5

    131a98dec8503f2cf89f6a84281e7055

    SHA1

    0c84432021bd8eb3152158d8dfef5d48be2ebafc

    SHA256

    7147fe48be21df1d030962afbd1e04e80ecc08f6c4977b8d2ac6146cf18055a5

    SHA512

    1242275add0fe5d334f3dcb0c31b4c97cb9a43879bb5fa309d07c823ba41de5af50640cc5f6c92d09d3f880534bfb19994a8d31d881d805e9f4da0a562989be8

  • C:\Users\Admin\AppData\Local\Temp\is-4C31G.tmp\is-17EJ7.tmp

    Filesize

    688KB

    MD5

    807603f3a565337ee2ac3e819b25ee58

    SHA1

    5cc4e6c82fbdda6697a1117561f23731d51baacd

    SHA256

    682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423

    SHA512

    252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

  • C:\Users\Admin\AppData\Local\Temp\is-4C31G.tmp\is-17EJ7.tmp

    Filesize

    688KB

    MD5

    807603f3a565337ee2ac3e819b25ee58

    SHA1

    5cc4e6c82fbdda6697a1117561f23731d51baacd

    SHA256

    682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423

    SHA512

    252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\zhD0UiLkIp.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\zhD0UiLkIp.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Split Files\SplitFiles124.exe

    Filesize

    3.3MB

    MD5

    131a98dec8503f2cf89f6a84281e7055

    SHA1

    0c84432021bd8eb3152158d8dfef5d48be2ebafc

    SHA256

    7147fe48be21df1d030962afbd1e04e80ecc08f6c4977b8d2ac6146cf18055a5

    SHA512

    1242275add0fe5d334f3dcb0c31b4c97cb9a43879bb5fa309d07c823ba41de5af50640cc5f6c92d09d3f880534bfb19994a8d31d881d805e9f4da0a562989be8

  • \Program Files (x86)\Split Files\SplitFiles124.exe

    Filesize

    3.3MB

    MD5

    131a98dec8503f2cf89f6a84281e7055

    SHA1

    0c84432021bd8eb3152158d8dfef5d48be2ebafc

    SHA256

    7147fe48be21df1d030962afbd1e04e80ecc08f6c4977b8d2ac6146cf18055a5

    SHA512

    1242275add0fe5d334f3dcb0c31b4c97cb9a43879bb5fa309d07c823ba41de5af50640cc5f6c92d09d3f880534bfb19994a8d31d881d805e9f4da0a562989be8

  • \Program Files (x86)\Split Files\SplitFiles124.exe

    Filesize

    3.3MB

    MD5

    131a98dec8503f2cf89f6a84281e7055

    SHA1

    0c84432021bd8eb3152158d8dfef5d48be2ebafc

    SHA256

    7147fe48be21df1d030962afbd1e04e80ecc08f6c4977b8d2ac6146cf18055a5

    SHA512

    1242275add0fe5d334f3dcb0c31b4c97cb9a43879bb5fa309d07c823ba41de5af50640cc5f6c92d09d3f880534bfb19994a8d31d881d805e9f4da0a562989be8

  • \Users\Admin\AppData\Local\Temp\is-4C31G.tmp\is-17EJ7.tmp

    Filesize

    688KB

    MD5

    807603f3a565337ee2ac3e819b25ee58

    SHA1

    5cc4e6c82fbdda6697a1117561f23731d51baacd

    SHA256

    682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423

    SHA512

    252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

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

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\zhD0UiLkIp.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\zhD0UiLkIp.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\zhD0UiLkIp.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/848-89-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/848-88-0x0000000001A80000-0x0000000002BCC000-memory.dmp

    Filesize

    17.3MB

  • memory/848-76-0x0000000001A80000-0x0000000002BCC000-memory.dmp

    Filesize

    17.3MB

  • memory/848-77-0x0000000000400000-0x000000000154C000-memory.dmp

    Filesize

    17.3MB

  • memory/848-78-0x0000000000400000-0x000000000154C000-memory.dmp

    Filesize

    17.3MB

  • memory/848-98-0x0000000000400000-0x000000000154C000-memory.dmp

    Filesize

    17.3MB

  • memory/848-93-0x0000000000400000-0x000000000154C000-memory.dmp

    Filesize

    17.3MB

  • memory/848-71-0x0000000000400000-0x000000000154C000-memory.dmp

    Filesize

    17.3MB

  • memory/848-75-0x0000000001A80000-0x0000000002BCC000-memory.dmp

    Filesize

    17.3MB

  • memory/848-87-0x0000000000400000-0x000000000154C000-memory.dmp

    Filesize

    17.3MB

  • memory/1268-86-0x0000000003A70000-0x0000000004BBC000-memory.dmp

    Filesize

    17.3MB

  • memory/1268-70-0x0000000003A70000-0x0000000004BBC000-memory.dmp

    Filesize

    17.3MB

  • memory/1744-54-0x0000000076531000-0x0000000076533000-memory.dmp

    Filesize

    8KB

  • memory/1744-55-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/1744-68-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/1744-99-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB