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Analysis

  • max time kernel
    55s
  • max time network
    58s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    06/01/2023, 21:32

General

  • Target

    file.exe

  • Size

    1.8MB

  • MD5

    d9be361b1f8bb4936005a74914fbe6f5

  • SHA1

    f537cd6a48c521499193c8278e1f84fc3f8ac9f7

  • SHA256

    e028ab3888d547deb1fc53fabd694a15d735f28bf68ac36b23d67ae9d2bb25d6

  • SHA512

    124ea8ab60b5d34de7694ff67483f78f3161fa9efd62cda6a07832c84a39498567a23884a65f4f321ac29d0f28957db55b1c50c300ee44c67de2009cede21de6

  • SSDEEP

    49152:Aixz0zjpivo4sD1FcflzKv1sBUpwci8Ptk4VRAlNpi:AixSiQFDbccdsBeVtao

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:940
    • C:\Users\Admin\AppData\Local\Temp\is-H35FS.tmp\is-1I95I.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-H35FS.tmp\is-1I95I.tmp" /SL4 $70128 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1609505 96768
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2040
      • C:\Program Files (x86)\Split Files\PlitFiles132.exe
        "C:\Program Files (x86)\Split Files\PlitFiles132.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1280
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\qW5ozCtrB.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:760
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "PlitFiles132.exe" /f & erase "C:\Program Files (x86)\Split Files\PlitFiles132.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1472
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "PlitFiles132.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1780

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Program Files (x86)\Split Files\PlitFiles132.exe

    Filesize

    3.1MB

    MD5

    33cfcce0a158901607d20a5a3e8b8f03

    SHA1

    1d24ceb8c75c1818a484c60b39e26293c9bf2ff4

    SHA256

    53aaa6ae501fdeea6a00f9a5a15a7f36e9b6b0158cde2c703c11240a4e02b52a

    SHA512

    c33fce3b85fc55db17ce37e1004348a99400fb5811605598f7f25a6fd07c0fdc2905c9c90c5e38c762adeadb0f71dd8ade5b91c5340649b0ec6ee7ff7c543100

  • C:\Program Files (x86)\Split Files\PlitFiles132.exe

    Filesize

    3.1MB

    MD5

    33cfcce0a158901607d20a5a3e8b8f03

    SHA1

    1d24ceb8c75c1818a484c60b39e26293c9bf2ff4

    SHA256

    53aaa6ae501fdeea6a00f9a5a15a7f36e9b6b0158cde2c703c11240a4e02b52a

    SHA512

    c33fce3b85fc55db17ce37e1004348a99400fb5811605598f7f25a6fd07c0fdc2905c9c90c5e38c762adeadb0f71dd8ade5b91c5340649b0ec6ee7ff7c543100

  • C:\Users\Admin\AppData\Local\Temp\is-H35FS.tmp\is-1I95I.tmp

    Filesize

    688KB

    MD5

    825e351a0f8f4c0765f2362966ac3122

    SHA1

    b7776ed8bd5cb15d6f6a12805de3394012b3f8c1

    SHA256

    d55e786215fe7ec096087dbf7a3558397768ad50f0182f474d2a3ce6ed772405

    SHA512

    775613f17bdfa13bfb99660f517d7b1fdd31acc268304a184fc86cc339c987e2d020c313a685c22fb406422137ffc4c999b7988951ade37c2990b898b0fb9f43

  • C:\Users\Admin\AppData\Local\Temp\is-H35FS.tmp\is-1I95I.tmp

    Filesize

    688KB

    MD5

    825e351a0f8f4c0765f2362966ac3122

    SHA1

    b7776ed8bd5cb15d6f6a12805de3394012b3f8c1

    SHA256

    d55e786215fe7ec096087dbf7a3558397768ad50f0182f474d2a3ce6ed772405

    SHA512

    775613f17bdfa13bfb99660f517d7b1fdd31acc268304a184fc86cc339c987e2d020c313a685c22fb406422137ffc4c999b7988951ade37c2990b898b0fb9f43

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\qW5ozCtrB.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\qW5ozCtrB.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Program Files (x86)\Split Files\PlitFiles132.exe

    Filesize

    3.1MB

    MD5

    33cfcce0a158901607d20a5a3e8b8f03

    SHA1

    1d24ceb8c75c1818a484c60b39e26293c9bf2ff4

    SHA256

    53aaa6ae501fdeea6a00f9a5a15a7f36e9b6b0158cde2c703c11240a4e02b52a

    SHA512

    c33fce3b85fc55db17ce37e1004348a99400fb5811605598f7f25a6fd07c0fdc2905c9c90c5e38c762adeadb0f71dd8ade5b91c5340649b0ec6ee7ff7c543100

  • \Program Files (x86)\Split Files\PlitFiles132.exe

    Filesize

    3.1MB

    MD5

    33cfcce0a158901607d20a5a3e8b8f03

    SHA1

    1d24ceb8c75c1818a484c60b39e26293c9bf2ff4

    SHA256

    53aaa6ae501fdeea6a00f9a5a15a7f36e9b6b0158cde2c703c11240a4e02b52a

    SHA512

    c33fce3b85fc55db17ce37e1004348a99400fb5811605598f7f25a6fd07c0fdc2905c9c90c5e38c762adeadb0f71dd8ade5b91c5340649b0ec6ee7ff7c543100

  • \Program Files (x86)\Split Files\PlitFiles132.exe

    Filesize

    3.1MB

    MD5

    33cfcce0a158901607d20a5a3e8b8f03

    SHA1

    1d24ceb8c75c1818a484c60b39e26293c9bf2ff4

    SHA256

    53aaa6ae501fdeea6a00f9a5a15a7f36e9b6b0158cde2c703c11240a4e02b52a

    SHA512

    c33fce3b85fc55db17ce37e1004348a99400fb5811605598f7f25a6fd07c0fdc2905c9c90c5e38c762adeadb0f71dd8ade5b91c5340649b0ec6ee7ff7c543100

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

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

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

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • \Users\Admin\AppData\Local\Temp\is-H35FS.tmp\is-1I95I.tmp

    Filesize

    688KB

    MD5

    825e351a0f8f4c0765f2362966ac3122

    SHA1

    b7776ed8bd5cb15d6f6a12805de3394012b3f8c1

    SHA256

    d55e786215fe7ec096087dbf7a3558397768ad50f0182f474d2a3ce6ed772405

    SHA512

    775613f17bdfa13bfb99660f517d7b1fdd31acc268304a184fc86cc339c987e2d020c313a685c22fb406422137ffc4c999b7988951ade37c2990b898b0fb9f43

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\qW5ozCtrB.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\qW5ozCtrB.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\qW5ozCtrB.exe

    Filesize

    72KB

    MD5

    3fb36cb0b7172e5298d2992d42984d06

    SHA1

    439827777df4a337cbb9fa4a4640d0d3fa1738b7

    SHA256

    27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

    SHA512

    6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

  • memory/940-97-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/940-66-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/940-55-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/940-54-0x0000000076411000-0x0000000076413000-memory.dmp

    Filesize

    8KB

  • memory/1280-74-0x0000000001BA0000-0x0000000002CB4000-memory.dmp

    Filesize

    17.1MB

  • memory/1280-78-0x0000000000400000-0x0000000001514000-memory.dmp

    Filesize

    17.1MB

  • memory/1280-77-0x0000000000400000-0x0000000001514000-memory.dmp

    Filesize

    17.1MB

  • memory/1280-76-0x0000000000400000-0x0000000001514000-memory.dmp

    Filesize

    17.1MB

  • memory/1280-75-0x0000000001BA0000-0x0000000002CB4000-memory.dmp

    Filesize

    17.1MB

  • memory/1280-95-0x0000000000400000-0x0000000001514000-memory.dmp

    Filesize

    17.1MB

  • memory/1280-87-0x0000000010000000-0x000000001001B000-memory.dmp

    Filesize

    108KB

  • memory/1280-91-0x0000000000400000-0x0000000001514000-memory.dmp

    Filesize

    17.1MB

  • memory/2040-73-0x00000000039B0000-0x0000000004AC4000-memory.dmp

    Filesize

    17.1MB

  • memory/2040-86-0x00000000039B0000-0x0000000004AC4000-memory.dmp

    Filesize

    17.1MB