Analysis

  • max time kernel
    55s
  • max time network
    57s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    29/12/2022, 00:54

General

  • Target

    file.exe

  • Size

    1.7MB

  • MD5

    acf295d1b9237aa575913e779e91be03

  • SHA1

    8e6d3e8fd488f4694d3b7427aa59aca0fb0dbc29

  • SHA256

    929cc3fad89061f918ed1eef3efa1d61679223b0e1af0514ebff9fd6c713bc99

  • SHA512

    25e803af0728afb431b497e57fc579c7d6f8e7fa5e695eccc1d794d49f325dd28cbcbe69817e27f989798dac7508bee520a21331ab21089d5a249f9a59ecc662

  • SSDEEP

    49152:Ui5rvOin8vnNoiPgYLmeabrbVQtcmHhFMmT9Kc2Nz:Ui5qiWozYLerbVxkhFC

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:1292
    • C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp" /SL4 $70126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1537937 96768
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1096
      • C:\Program Files (x86)\Split Files\SplitFiles123.exe
        "C:\Program Files (x86)\Split Files\SplitFiles123.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1164
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\dVfay.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:980
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles123.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles123.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:808
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles123.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1348

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.1MB

    MD5

    2c4eb645fa6e9d780e5877cee6184b41

    SHA1

    664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53

    SHA256

    78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0

    SHA512

    5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

  • C:\Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.1MB

    MD5

    2c4eb645fa6e9d780e5877cee6184b41

    SHA1

    664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53

    SHA256

    78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0

    SHA512

    5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

  • C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp

    Filesize

    688KB

    MD5

    807603f3a565337ee2ac3e819b25ee58

    SHA1

    5cc4e6c82fbdda6697a1117561f23731d51baacd

    SHA256

    682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423

    SHA512

    252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

  • C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp

    Filesize

    688KB

    MD5

    807603f3a565337ee2ac3e819b25ee58

    SHA1

    5cc4e6c82fbdda6697a1117561f23731d51baacd

    SHA256

    682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423

    SHA512

    252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

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

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.1MB

    MD5

    2c4eb645fa6e9d780e5877cee6184b41

    SHA1

    664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53

    SHA256

    78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0

    SHA512

    5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

  • \Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.1MB

    MD5

    2c4eb645fa6e9d780e5877cee6184b41

    SHA1

    664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53

    SHA256

    78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0

    SHA512

    5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

  • \Program Files (x86)\Split Files\SplitFiles123.exe

    Filesize

    3.1MB

    MD5

    2c4eb645fa6e9d780e5877cee6184b41

    SHA1

    664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53

    SHA256

    78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0

    SHA512

    5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

  • \Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp

    Filesize

    688KB

    MD5

    807603f3a565337ee2ac3e819b25ee58

    SHA1

    5cc4e6c82fbdda6697a1117561f23731d51baacd

    SHA256

    682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423

    SHA512

    252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

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

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/1096-70-0x0000000003980000-0x0000000004A9A000-memory.dmp

    Filesize

    17.1MB

  • memory/1096-91-0x0000000003980000-0x0000000004A9A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-92-0x0000000001D10000-0x0000000002E2A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-74-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-78-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-77-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-99-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-94-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-86-0x0000000000400000-0x000000000151A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-87-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/1164-76-0x0000000001D10000-0x0000000002E2A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-75-0x0000000001D10000-0x0000000002E2A000-memory.dmp

    Filesize

    17.1MB

  • memory/1164-93-0x0000000001D10000-0x0000000002E2A000-memory.dmp

    Filesize

    17.1MB

  • memory/1292-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

    Filesize

    8KB

  • memory/1292-69-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/1292-55-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/1292-100-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB