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Analysis

  • max time kernel
    63s
  • max time network
    64s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    06/01/2023, 01:16

General

  • Target

    file.exe

  • Size

    1.9MB

  • MD5

    c0c1b07349e5627ac75c1a3acbbcc5dd

  • SHA1

    1b252adaef3682657cc0473a4d5a5725c7fc8b11

  • SHA256

    98cc016f7aaa1b5ece9265b613a7dcd56458b56dbc0bf5b1a52946fbfe0d0ef8

  • SHA512

    fe4aa3b8af18add5927a2b7cafa24eb23546d88654f75cc8f8ebaa9279b1ba919c08aa8d5b4e138b1d49af78fc68a9996dde68512cee22b3387032f435796c5e

  • SSDEEP

    49152:bihYNfRUZXavMO0Jovs4vDO9mu6PbsnXDMetVE8UkqB9:biIR26MaXv8muKoTMetVpqb

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:536
    • C:\Users\Admin\AppData\Local\Temp\is-2K28O.tmp\is-DLCU4.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-2K28O.tmp\is-DLCU4.tmp" /SL4 $60122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1692618 170496
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1724
      • C:\Program Files (x86)\Split Files\SplitFiles131.exe
        "C:\Program Files (x86)\Split Files\SplitFiles131.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:960
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\aadF7xIU.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1360
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles131.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles131.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:700
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles131.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:844

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Split Files\SplitFiles131.exe

    Filesize

    3.1MB

    MD5

    b882f2f35886b776b20b34453a777727

    SHA1

    52b12b4ce14b3ed1b34e6632116d8ed68bc68b20

    SHA256

    4dabb6bd5a9aa9a24ccfa60108e8cbd3a9a6356a2f58aeae55e4b1cf6a5c9798

    SHA512

    654c588880a16eed5d53673bbd425c3e1318e6792717d8e2ccbfbfb466928c6251d150c17a28c5842fda3668237c7ff9619f086d0d01ed428ed7d18207b7803f

  • C:\Program Files (x86)\Split Files\SplitFiles131.exe

    Filesize

    3.1MB

    MD5

    b882f2f35886b776b20b34453a777727

    SHA1

    52b12b4ce14b3ed1b34e6632116d8ed68bc68b20

    SHA256

    4dabb6bd5a9aa9a24ccfa60108e8cbd3a9a6356a2f58aeae55e4b1cf6a5c9798

    SHA512

    654c588880a16eed5d53673bbd425c3e1318e6792717d8e2ccbfbfb466928c6251d150c17a28c5842fda3668237c7ff9619f086d0d01ed428ed7d18207b7803f

  • C:\Users\Admin\AppData\Local\Temp\is-2K28O.tmp\is-DLCU4.tmp

    Filesize

    760KB

    MD5

    e8176050192fbb976d70238e3c121f4c

    SHA1

    2f1fd24efe1f3f3fee775cc3f5255b32f8880900

    SHA256

    ab4fe42a7b708ddb648bb2088216ff47b877ae599fd52ff50359fc1db8e11ef7

    SHA512

    27edf7a71c6546f1ab52e7ef97e404975ddd237d6c2d1038d24a49eab724971884510f00f427c713adb105857a0b12c7d57ca1ca1c70a6cefed4be619c345f4c

  • C:\Users\Admin\AppData\Local\Temp\is-2K28O.tmp\is-DLCU4.tmp

    Filesize

    760KB

    MD5

    e8176050192fbb976d70238e3c121f4c

    SHA1

    2f1fd24efe1f3f3fee775cc3f5255b32f8880900

    SHA256

    ab4fe42a7b708ddb648bb2088216ff47b877ae599fd52ff50359fc1db8e11ef7

    SHA512

    27edf7a71c6546f1ab52e7ef97e404975ddd237d6c2d1038d24a49eab724971884510f00f427c713adb105857a0b12c7d57ca1ca1c70a6cefed4be619c345f4c

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\aadF7xIU.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\aadF7xIU.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Split Files\SplitFiles131.exe

    Filesize

    3.1MB

    MD5

    b882f2f35886b776b20b34453a777727

    SHA1

    52b12b4ce14b3ed1b34e6632116d8ed68bc68b20

    SHA256

    4dabb6bd5a9aa9a24ccfa60108e8cbd3a9a6356a2f58aeae55e4b1cf6a5c9798

    SHA512

    654c588880a16eed5d53673bbd425c3e1318e6792717d8e2ccbfbfb466928c6251d150c17a28c5842fda3668237c7ff9619f086d0d01ed428ed7d18207b7803f

  • \Program Files (x86)\Split Files\SplitFiles131.exe

    Filesize

    3.1MB

    MD5

    b882f2f35886b776b20b34453a777727

    SHA1

    52b12b4ce14b3ed1b34e6632116d8ed68bc68b20

    SHA256

    4dabb6bd5a9aa9a24ccfa60108e8cbd3a9a6356a2f58aeae55e4b1cf6a5c9798

    SHA512

    654c588880a16eed5d53673bbd425c3e1318e6792717d8e2ccbfbfb466928c6251d150c17a28c5842fda3668237c7ff9619f086d0d01ed428ed7d18207b7803f

  • \Program Files (x86)\Split Files\SplitFiles131.exe

    Filesize

    3.1MB

    MD5

    b882f2f35886b776b20b34453a777727

    SHA1

    52b12b4ce14b3ed1b34e6632116d8ed68bc68b20

    SHA256

    4dabb6bd5a9aa9a24ccfa60108e8cbd3a9a6356a2f58aeae55e4b1cf6a5c9798

    SHA512

    654c588880a16eed5d53673bbd425c3e1318e6792717d8e2ccbfbfb466928c6251d150c17a28c5842fda3668237c7ff9619f086d0d01ed428ed7d18207b7803f

  • \Users\Admin\AppData\Local\Temp\is-2K28O.tmp\is-DLCU4.tmp

    Filesize

    760KB

    MD5

    e8176050192fbb976d70238e3c121f4c

    SHA1

    2f1fd24efe1f3f3fee775cc3f5255b32f8880900

    SHA256

    ab4fe42a7b708ddb648bb2088216ff47b877ae599fd52ff50359fc1db8e11ef7

    SHA512

    27edf7a71c6546f1ab52e7ef97e404975ddd237d6c2d1038d24a49eab724971884510f00f427c713adb105857a0b12c7d57ca1ca1c70a6cefed4be619c345f4c

  • \Users\Admin\AppData\Local\Temp\is-4UP1C.tmp\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • \Users\Admin\AppData\Local\Temp\is-4UP1C.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Local\Temp\is-4UP1C.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\aadF7xIU.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\aadF7xIU.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\aadF7xIU.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/536-69-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/536-100-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/536-54-0x0000000075B11000-0x0000000075B13000-memory.dmp

    Filesize

    8KB

  • memory/536-55-0x0000000000400000-0x0000000000430000-memory.dmp

    Filesize

    192KB

  • memory/960-78-0x0000000000400000-0x0000000001526000-memory.dmp

    Filesize

    17.1MB

  • memory/960-89-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/960-74-0x0000000000400000-0x0000000001526000-memory.dmp

    Filesize

    17.1MB

  • memory/960-75-0x0000000002080000-0x00000000031A6000-memory.dmp

    Filesize

    17.1MB

  • memory/960-77-0x0000000000400000-0x0000000001526000-memory.dmp

    Filesize

    17.1MB

  • memory/960-98-0x0000000000400000-0x0000000001526000-memory.dmp

    Filesize

    17.1MB

  • memory/960-87-0x0000000000400000-0x0000000001526000-memory.dmp

    Filesize

    17.1MB

  • memory/960-88-0x0000000002080000-0x00000000031A6000-memory.dmp

    Filesize

    17.1MB

  • memory/960-90-0x0000000002080000-0x00000000031A6000-memory.dmp

    Filesize

    17.1MB

  • memory/960-76-0x0000000002080000-0x00000000031A6000-memory.dmp

    Filesize

    17.1MB

  • memory/960-94-0x0000000000400000-0x0000000001526000-memory.dmp

    Filesize

    17.1MB

  • memory/1724-86-0x0000000003980000-0x0000000004AA6000-memory.dmp

    Filesize

    17.1MB

  • memory/1724-73-0x0000000003980000-0x0000000004AA6000-memory.dmp

    Filesize

    17.1MB