Analysis

  • max time kernel
    72s
  • max time network
    50s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    20-10-2022 19:44

General

  • Target

    ac658726e7d186f5732d1496d473cee9a4119675da4a4f95dce943350459da0a.exe

  • Size

    593KB

  • MD5

    a01ff27c6d183a9b58e6c7394db22250

  • SHA1

    78a563c62fbf2d2b065c82ba741ddc9465f83760

  • SHA256

    ac658726e7d186f5732d1496d473cee9a4119675da4a4f95dce943350459da0a

  • SHA512

    f0541e5d656298f703c1a3cc3bee5e745eb127123ddb7280e3b64936c1803c4d311d0d1592705359871319e5364bb318871b47e3b2bc00a2187cc0fc72a84359

  • SSDEEP

    12288:VuBSP/amCdBJSpc/aaT9/gur79Yq63kfydqAKTE1qH:sA6dBwy/aI/gK79YH0FAgxH

Malware Config

Signatures

  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Executes dropped EXE 5 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 18 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ac658726e7d186f5732d1496d473cee9a4119675da4a4f95dce943350459da0a.exe
    "C:\Users\Admin\AppData\Local\Temp\ac658726e7d186f5732d1496d473cee9a4119675da4a4f95dce943350459da0a.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1816
    • C:\Users\Admin\BqjnC0gFVHRul8.exe
      BqjnC0gFVHRul8.exe
      2⤵
      • Modifies visiblity of hidden/system files in Explorer
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1056
      • C:\Users\Admin\yoozuin.exe
        "C:\Users\Admin\yoozuin.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetWindowsHookEx
        PID:1648
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c tasklist&&del BqjnC0gFVHRul8.exe
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1664
        • C:\Windows\SysWOW64\tasklist.exe
          tasklist
          4⤵
          • Enumerates processes with tasklist
          • Suspicious use of AdjustPrivilegeToken
          PID:1836
    • C:\Users\Admin\win.exe
      win.exe
      2⤵
      • Executes dropped EXE
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of AdjustPrivilegeToken
      PID:892
    • C:\Users\Admin\wio.exe
      wio.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1476
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\mfcrmp.dll",Startup
        3⤵
        • Loads dropped DLL
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1624
        • C:\Windows\SysWOW64\rundll32.exe
          rundll32.exe "C:\Users\Admin\AppData\Local\mfcrmp.dll",iep
          4⤵
          • Loads dropped DLL
          PID:1632
    • C:\Users\Admin\wiq.exe
      wiq.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1020
      • C:\Windows\SysWOW64\svchost.exe
        "C:\Windows\system32\svchost.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:1744
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c del ac658726e7d186f5732d1496d473cee9a4119675da4a4f95dce943350459da0a.exe
      2⤵
      • Deletes itself
      PID:1224

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\mfcrmp.dll

    Filesize

    103KB

    MD5

    19f8a2d4e8270baf8bd5a6086f565e70

    SHA1

    b5a05abe09066906b569f0fadefb00fb567ef547

    SHA256

    2f677a22315a327d82514449be56d53cd85a8dd3eef75317231647faac6caf50

    SHA512

    8a5686b22a993f8c38420f9c163e6321eab7a089858da4852160684ccc260d82f21e933365e0f413418849f9af26786d805d0dd6295546b52ae9ab5fcf88ed63

  • C:\Users\Admin\BqjnC0gFVHRul8.exe

    Filesize

    148KB

    MD5

    fc8e30e732d9e1483b7d29ea39ad9c15

    SHA1

    04215f820a214d11e1dd9a832ac264605cf98604

    SHA256

    c3bb55f793445fe9ca4dbdd55c7dd1d5ec90c807d3270833b3f9678a9a956585

    SHA512

    d56cb22fde3d54cc4d5008857e573e4b8182b4d690c9a9ca9978aca5ed0051001c919588918ac17dd7c3d41c90acca9411d42cf33c10accd12d3d313fb60afd6

  • C:\Users\Admin\BqjnC0gFVHRul8.exe

    Filesize

    148KB

    MD5

    fc8e30e732d9e1483b7d29ea39ad9c15

    SHA1

    04215f820a214d11e1dd9a832ac264605cf98604

    SHA256

    c3bb55f793445fe9ca4dbdd55c7dd1d5ec90c807d3270833b3f9678a9a956585

    SHA512

    d56cb22fde3d54cc4d5008857e573e4b8182b4d690c9a9ca9978aca5ed0051001c919588918ac17dd7c3d41c90acca9411d42cf33c10accd12d3d313fb60afd6

  • C:\Users\Admin\win.exe

    Filesize

    172KB

    MD5

    16dfe37b77854e727eabedd05239ebee

    SHA1

    9218bb944834fb46eb2f04858ada0dacdf821d77

    SHA256

    8ee33551b06628414ed9003fd0c35ab5abbedf6f85e50c9bfdb99fc72172d267

    SHA512

    56c765b030817f0903dd9ce50aefb3511e30706891f7d9accd7f95c465d1890fdda3ab59238919b59951fe1c361699f80675b6fab9c9df26dd4f22d97b0ca903

  • C:\Users\Admin\win.exe

    Filesize

    172KB

    MD5

    16dfe37b77854e727eabedd05239ebee

    SHA1

    9218bb944834fb46eb2f04858ada0dacdf821d77

    SHA256

    8ee33551b06628414ed9003fd0c35ab5abbedf6f85e50c9bfdb99fc72172d267

    SHA512

    56c765b030817f0903dd9ce50aefb3511e30706891f7d9accd7f95c465d1890fdda3ab59238919b59951fe1c361699f80675b6fab9c9df26dd4f22d97b0ca903

  • C:\Users\Admin\wio.exe

    Filesize

    103KB

    MD5

    f7756f6980dc23ef661085d6cd999831

    SHA1

    cd77f7a9bc8c058023779a531e2deac8c3241638

    SHA256

    53122fb8bd9b1a304af221e3172c1770f18d20e71f275b98bcfe10cc81ec3740

    SHA512

    b1e51945dea731c962140b9755c2d6b549feb3fb0d9793a0c67fe6a99498dde1a4744931ca80053f723eec221975e26220e7c357188bd0f11f5966bf2cc618df

  • C:\Users\Admin\wio.exe

    Filesize

    103KB

    MD5

    f7756f6980dc23ef661085d6cd999831

    SHA1

    cd77f7a9bc8c058023779a531e2deac8c3241638

    SHA256

    53122fb8bd9b1a304af221e3172c1770f18d20e71f275b98bcfe10cc81ec3740

    SHA512

    b1e51945dea731c962140b9755c2d6b549feb3fb0d9793a0c67fe6a99498dde1a4744931ca80053f723eec221975e26220e7c357188bd0f11f5966bf2cc618df

  • C:\Users\Admin\wiq.exe

    Filesize

    52KB

    MD5

    65a849404ffe62e0d2f56d7993f00920

    SHA1

    6401a9e92690172958fbf0ee122990479628e92f

    SHA256

    afe7c75a0e8d28d5f068cf3605f9aa10016d37348eab013b6dc487e943110c50

    SHA512

    99af61b924d550ff3d8c52db86991cc40ebd94510982dc69ce99bb975ad8de32c07ea9c7eb28d05e55117b15ab3b57d3d2bfe25c744c8918d63d96ef974d5d38

  • C:\Users\Admin\wiq.exe

    Filesize

    52KB

    MD5

    65a849404ffe62e0d2f56d7993f00920

    SHA1

    6401a9e92690172958fbf0ee122990479628e92f

    SHA256

    afe7c75a0e8d28d5f068cf3605f9aa10016d37348eab013b6dc487e943110c50

    SHA512

    99af61b924d550ff3d8c52db86991cc40ebd94510982dc69ce99bb975ad8de32c07ea9c7eb28d05e55117b15ab3b57d3d2bfe25c744c8918d63d96ef974d5d38

  • C:\Users\Admin\yoozuin.exe

    Filesize

    148KB

    MD5

    800c0c06c2905bfa5d00f23d6d824874

    SHA1

    4414be5e23ee4107f5760782605973adf60d89e9

    SHA256

    c77fb4aca8bf2919ef879c3ca9c21da13660f52df90922025cefd53766290687

    SHA512

    8488693b89d5547982bde312f8da76c5d4c57082a281314560fa5fa157a1c0910d63902e499fe05b7d329d5effe2643ee3a82f0d0937dec3c90e2b52fccfe831

  • C:\Users\Admin\yoozuin.exe

    Filesize

    148KB

    MD5

    800c0c06c2905bfa5d00f23d6d824874

    SHA1

    4414be5e23ee4107f5760782605973adf60d89e9

    SHA256

    c77fb4aca8bf2919ef879c3ca9c21da13660f52df90922025cefd53766290687

    SHA512

    8488693b89d5547982bde312f8da76c5d4c57082a281314560fa5fa157a1c0910d63902e499fe05b7d329d5effe2643ee3a82f0d0937dec3c90e2b52fccfe831

  • \Users\Admin\AppData\Local\mfcrmp.dll

    Filesize

    103KB

    MD5

    19f8a2d4e8270baf8bd5a6086f565e70

    SHA1

    b5a05abe09066906b569f0fadefb00fb567ef547

    SHA256

    2f677a22315a327d82514449be56d53cd85a8dd3eef75317231647faac6caf50

    SHA512

    8a5686b22a993f8c38420f9c163e6321eab7a089858da4852160684ccc260d82f21e933365e0f413418849f9af26786d805d0dd6295546b52ae9ab5fcf88ed63

  • \Users\Admin\AppData\Local\mfcrmp.dll

    Filesize

    103KB

    MD5

    19f8a2d4e8270baf8bd5a6086f565e70

    SHA1

    b5a05abe09066906b569f0fadefb00fb567ef547

    SHA256

    2f677a22315a327d82514449be56d53cd85a8dd3eef75317231647faac6caf50

    SHA512

    8a5686b22a993f8c38420f9c163e6321eab7a089858da4852160684ccc260d82f21e933365e0f413418849f9af26786d805d0dd6295546b52ae9ab5fcf88ed63

  • \Users\Admin\AppData\Local\mfcrmp.dll

    Filesize

    103KB

    MD5

    19f8a2d4e8270baf8bd5a6086f565e70

    SHA1

    b5a05abe09066906b569f0fadefb00fb567ef547

    SHA256

    2f677a22315a327d82514449be56d53cd85a8dd3eef75317231647faac6caf50

    SHA512

    8a5686b22a993f8c38420f9c163e6321eab7a089858da4852160684ccc260d82f21e933365e0f413418849f9af26786d805d0dd6295546b52ae9ab5fcf88ed63

  • \Users\Admin\AppData\Local\mfcrmp.dll

    Filesize

    103KB

    MD5

    19f8a2d4e8270baf8bd5a6086f565e70

    SHA1

    b5a05abe09066906b569f0fadefb00fb567ef547

    SHA256

    2f677a22315a327d82514449be56d53cd85a8dd3eef75317231647faac6caf50

    SHA512

    8a5686b22a993f8c38420f9c163e6321eab7a089858da4852160684ccc260d82f21e933365e0f413418849f9af26786d805d0dd6295546b52ae9ab5fcf88ed63

  • \Users\Admin\AppData\Local\mfcrmp.dll

    Filesize

    103KB

    MD5

    19f8a2d4e8270baf8bd5a6086f565e70

    SHA1

    b5a05abe09066906b569f0fadefb00fb567ef547

    SHA256

    2f677a22315a327d82514449be56d53cd85a8dd3eef75317231647faac6caf50

    SHA512

    8a5686b22a993f8c38420f9c163e6321eab7a089858da4852160684ccc260d82f21e933365e0f413418849f9af26786d805d0dd6295546b52ae9ab5fcf88ed63

  • \Users\Admin\AppData\Local\mfcrmp.dll

    Filesize

    103KB

    MD5

    19f8a2d4e8270baf8bd5a6086f565e70

    SHA1

    b5a05abe09066906b569f0fadefb00fb567ef547

    SHA256

    2f677a22315a327d82514449be56d53cd85a8dd3eef75317231647faac6caf50

    SHA512

    8a5686b22a993f8c38420f9c163e6321eab7a089858da4852160684ccc260d82f21e933365e0f413418849f9af26786d805d0dd6295546b52ae9ab5fcf88ed63

  • \Users\Admin\AppData\Local\mfcrmp.dll

    Filesize

    103KB

    MD5

    19f8a2d4e8270baf8bd5a6086f565e70

    SHA1

    b5a05abe09066906b569f0fadefb00fb567ef547

    SHA256

    2f677a22315a327d82514449be56d53cd85a8dd3eef75317231647faac6caf50

    SHA512

    8a5686b22a993f8c38420f9c163e6321eab7a089858da4852160684ccc260d82f21e933365e0f413418849f9af26786d805d0dd6295546b52ae9ab5fcf88ed63

  • \Users\Admin\AppData\Local\mfcrmp.dll

    Filesize

    103KB

    MD5

    19f8a2d4e8270baf8bd5a6086f565e70

    SHA1

    b5a05abe09066906b569f0fadefb00fb567ef547

    SHA256

    2f677a22315a327d82514449be56d53cd85a8dd3eef75317231647faac6caf50

    SHA512

    8a5686b22a993f8c38420f9c163e6321eab7a089858da4852160684ccc260d82f21e933365e0f413418849f9af26786d805d0dd6295546b52ae9ab5fcf88ed63

  • \Users\Admin\BqjnC0gFVHRul8.exe

    Filesize

    148KB

    MD5

    fc8e30e732d9e1483b7d29ea39ad9c15

    SHA1

    04215f820a214d11e1dd9a832ac264605cf98604

    SHA256

    c3bb55f793445fe9ca4dbdd55c7dd1d5ec90c807d3270833b3f9678a9a956585

    SHA512

    d56cb22fde3d54cc4d5008857e573e4b8182b4d690c9a9ca9978aca5ed0051001c919588918ac17dd7c3d41c90acca9411d42cf33c10accd12d3d313fb60afd6

  • \Users\Admin\BqjnC0gFVHRul8.exe

    Filesize

    148KB

    MD5

    fc8e30e732d9e1483b7d29ea39ad9c15

    SHA1

    04215f820a214d11e1dd9a832ac264605cf98604

    SHA256

    c3bb55f793445fe9ca4dbdd55c7dd1d5ec90c807d3270833b3f9678a9a956585

    SHA512

    d56cb22fde3d54cc4d5008857e573e4b8182b4d690c9a9ca9978aca5ed0051001c919588918ac17dd7c3d41c90acca9411d42cf33c10accd12d3d313fb60afd6

  • \Users\Admin\win.exe

    Filesize

    172KB

    MD5

    16dfe37b77854e727eabedd05239ebee

    SHA1

    9218bb944834fb46eb2f04858ada0dacdf821d77

    SHA256

    8ee33551b06628414ed9003fd0c35ab5abbedf6f85e50c9bfdb99fc72172d267

    SHA512

    56c765b030817f0903dd9ce50aefb3511e30706891f7d9accd7f95c465d1890fdda3ab59238919b59951fe1c361699f80675b6fab9c9df26dd4f22d97b0ca903

  • \Users\Admin\win.exe

    Filesize

    172KB

    MD5

    16dfe37b77854e727eabedd05239ebee

    SHA1

    9218bb944834fb46eb2f04858ada0dacdf821d77

    SHA256

    8ee33551b06628414ed9003fd0c35ab5abbedf6f85e50c9bfdb99fc72172d267

    SHA512

    56c765b030817f0903dd9ce50aefb3511e30706891f7d9accd7f95c465d1890fdda3ab59238919b59951fe1c361699f80675b6fab9c9df26dd4f22d97b0ca903

  • \Users\Admin\wio.exe

    Filesize

    103KB

    MD5

    f7756f6980dc23ef661085d6cd999831

    SHA1

    cd77f7a9bc8c058023779a531e2deac8c3241638

    SHA256

    53122fb8bd9b1a304af221e3172c1770f18d20e71f275b98bcfe10cc81ec3740

    SHA512

    b1e51945dea731c962140b9755c2d6b549feb3fb0d9793a0c67fe6a99498dde1a4744931ca80053f723eec221975e26220e7c357188bd0f11f5966bf2cc618df

  • \Users\Admin\wio.exe

    Filesize

    103KB

    MD5

    f7756f6980dc23ef661085d6cd999831

    SHA1

    cd77f7a9bc8c058023779a531e2deac8c3241638

    SHA256

    53122fb8bd9b1a304af221e3172c1770f18d20e71f275b98bcfe10cc81ec3740

    SHA512

    b1e51945dea731c962140b9755c2d6b549feb3fb0d9793a0c67fe6a99498dde1a4744931ca80053f723eec221975e26220e7c357188bd0f11f5966bf2cc618df

  • \Users\Admin\wiq.exe

    Filesize

    52KB

    MD5

    65a849404ffe62e0d2f56d7993f00920

    SHA1

    6401a9e92690172958fbf0ee122990479628e92f

    SHA256

    afe7c75a0e8d28d5f068cf3605f9aa10016d37348eab013b6dc487e943110c50

    SHA512

    99af61b924d550ff3d8c52db86991cc40ebd94510982dc69ce99bb975ad8de32c07ea9c7eb28d05e55117b15ab3b57d3d2bfe25c744c8918d63d96ef974d5d38

  • \Users\Admin\wiq.exe

    Filesize

    52KB

    MD5

    65a849404ffe62e0d2f56d7993f00920

    SHA1

    6401a9e92690172958fbf0ee122990479628e92f

    SHA256

    afe7c75a0e8d28d5f068cf3605f9aa10016d37348eab013b6dc487e943110c50

    SHA512

    99af61b924d550ff3d8c52db86991cc40ebd94510982dc69ce99bb975ad8de32c07ea9c7eb28d05e55117b15ab3b57d3d2bfe25c744c8918d63d96ef974d5d38

  • \Users\Admin\yoozuin.exe

    Filesize

    148KB

    MD5

    800c0c06c2905bfa5d00f23d6d824874

    SHA1

    4414be5e23ee4107f5760782605973adf60d89e9

    SHA256

    c77fb4aca8bf2919ef879c3ca9c21da13660f52df90922025cefd53766290687

    SHA512

    8488693b89d5547982bde312f8da76c5d4c57082a281314560fa5fa157a1c0910d63902e499fe05b7d329d5effe2643ee3a82f0d0937dec3c90e2b52fccfe831

  • \Users\Admin\yoozuin.exe

    Filesize

    148KB

    MD5

    800c0c06c2905bfa5d00f23d6d824874

    SHA1

    4414be5e23ee4107f5760782605973adf60d89e9

    SHA256

    c77fb4aca8bf2919ef879c3ca9c21da13660f52df90922025cefd53766290687

    SHA512

    8488693b89d5547982bde312f8da76c5d4c57082a281314560fa5fa157a1c0910d63902e499fe05b7d329d5effe2643ee3a82f0d0937dec3c90e2b52fccfe831

  • memory/892-82-0x00000000001B0000-0x0000000000206000-memory.dmp

    Filesize

    344KB

  • memory/892-100-0x00000000001B0000-0x0000000000206000-memory.dmp

    Filesize

    344KB

  • memory/892-99-0x0000000000400000-0x0000000000456000-memory.dmp

    Filesize

    344KB

  • memory/892-65-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

    Filesize

    8KB

  • memory/1476-69-0x0000000010000000-0x000000001001D000-memory.dmp

    Filesize

    116KB

  • memory/1476-101-0x0000000000241000-0x000000000024E000-memory.dmp

    Filesize

    52KB

  • memory/1624-103-0x0000000000BE1000-0x0000000000BEE000-memory.dmp

    Filesize

    52KB

  • memory/1624-98-0x0000000010000000-0x000000001001D000-memory.dmp

    Filesize

    116KB

  • memory/1632-112-0x00000000001B1000-0x00000000001BE000-memory.dmp

    Filesize

    52KB

  • memory/1744-88-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB

  • memory/1744-91-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB

  • memory/1744-87-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB

  • memory/1744-102-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB

  • memory/1744-85-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB

  • memory/1744-84-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB

  • memory/1744-92-0x0000000000400000-0x000000000040E000-memory.dmp

    Filesize

    56KB