Analysis

  • max time kernel
    162s
  • max time network
    171s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    03/09/2023, 17:41

General

  • Target

    695526335af4b4ff3d8650ee928576effb496b1d2316fb2258718c32b6e946e5.exe

  • Size

    280KB

  • MD5

    35fcf565ecb8e114c7df274ef211f95c

  • SHA1

    4a1ca9576c41477f65045ba14d0882fe958b2362

  • SHA256

    695526335af4b4ff3d8650ee928576effb496b1d2316fb2258718c32b6e946e5

  • SHA512

    cc9ee7593cd0865f8abb53d120dbf9134bbaef8cee2087bb40b85787901721452d220d839694514da38d99985ab2938f5991a2625f115a0e9827be17d857572c

  • SSDEEP

    6144:YXSQ8BCMis1TMrRQwy7eIeCDbFcEOkCybEaQRXr9HNdvOa:YXv8BCLocRZy7eIeyb1Okx2LIa

Score
8/10
upx

Malware Config

Signatures

  • Drops file in Drivers directory 2 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • UPX packed file 7 IoCs

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

  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Drops file in System32 directory 14 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 2 IoCs
  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: LoadsDriver 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 18 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs

Processes

  • C:\Windows\system32\winlogon.exe
    winlogon.exe
    1⤵
      PID:424
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      1⤵
      • Drops file in Drivers directory
      • Loads dropped DLL
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1292
      • C:\Users\Admin\AppData\Local\Temp\695526335af4b4ff3d8650ee928576effb496b1d2316fb2258718c32b6e946e5.exe
        "C:\Users\Admin\AppData\Local\Temp\695526335af4b4ff3d8650ee928576effb496b1d2316fb2258718c32b6e946e5.exe"
        2⤵
        • Drops file in System32 directory
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2472
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c timeout /t 1 & del /Q /F "C:\Users\Admin\AppData\Local\Temp\695526335af4b4ff3d8650ee928576effb496b1d2316fb2258718c32b6e946e5.exe"
          3⤵
          • Deletes itself
          • Suspicious use of WriteProcessMemory
          PID:1700
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 1
            4⤵
            • Delays execution with timeout.exe
            PID:2876
      • C:\ProgramData\Microsoft\mountvol.exe
        "C:\ProgramData\Microsoft\mountvol.exe"
        2⤵
        • Drops file in Drivers directory
        • Executes dropped EXE
        • Drops file in System32 directory
        • Drops file in Windows directory
        • Modifies system certificate store
        • Suspicious use of AdjustPrivilegeToken
        PID:2780
    • C:\Windows\Syswow64\38a9b784
      C:\Windows\Syswow64\38a9b784
      1⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Modifies data under HKEY_USERS
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1936
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c timeout /t 1 & del /Q /F "C:\Windows\Syswow64\38a9b784"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1404
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 1
          3⤵
          • Delays execution with timeout.exe
          PID:2848

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\ProgramData\Microsoft\mountvol.exe

      Filesize

      14KB

      MD5

      2113b455b62ecebe1246117381c0d005

      SHA1

      0bae79d8a7b7a866fe808e92c1c96c052d8600f1

      SHA256

      15b4453744806f7be8b9a56791fc064501bab411423ba5d723d7cdd01e7bd321

      SHA512

      42b8adb2c721f2e3d445bab716ccbcb14a89104eb71917379c7ac2a8818dd9c0b66a83edf288bdc532bc19e1f715b12043fb17c6a905b40f0d742530c3c36c4b

    • C:\Users\Admin\AppData\Local\Temp\Tar7FD.tmp

      Filesize

      163KB

      MD5

      9441737383d21192400eca82fda910ec

      SHA1

      725e0d606a4fc9ba44aa8ffde65bed15e65367e4

      SHA256

      bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

      SHA512

      7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

    • C:\Windows\SysWOW64\38a9b784

      Filesize

      280KB

      MD5

      10c7dc3b4ce0197fc0257a02678c3cfc

      SHA1

      e7381fa1c83beb3c597fd05777fe75d947180f9e

      SHA256

      457b086dd197623075138a5b910dbf968a1942bf1bfa120d00f690e293f1991d

      SHA512

      c42c4842e17feb5a92da4fe2488873f841fcffeb0607690b3e811b916f7ddf37841a74b04bce3710fd9c092920c779ebbcc69595bb1a7ac5c106a2dd5293af1e

    • C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

      Filesize

      61KB

      MD5

      f3441b8572aae8801c04f3060b550443

      SHA1

      4ef0a35436125d6821831ef36c28ffaf196cda15

      SHA256

      6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

      SHA512

      5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

    • C:\Windows\Syswow64\38a9b784

      Filesize

      280KB

      MD5

      10c7dc3b4ce0197fc0257a02678c3cfc

      SHA1

      e7381fa1c83beb3c597fd05777fe75d947180f9e

      SHA256

      457b086dd197623075138a5b910dbf968a1942bf1bfa120d00f690e293f1991d

      SHA512

      c42c4842e17feb5a92da4fe2488873f841fcffeb0607690b3e811b916f7ddf37841a74b04bce3710fd9c092920c779ebbcc69595bb1a7ac5c106a2dd5293af1e

    • \ProgramData\Microsoft\mountvol.exe

      Filesize

      14KB

      MD5

      2113b455b62ecebe1246117381c0d005

      SHA1

      0bae79d8a7b7a866fe808e92c1c96c052d8600f1

      SHA256

      15b4453744806f7be8b9a56791fc064501bab411423ba5d723d7cdd01e7bd321

      SHA512

      42b8adb2c721f2e3d445bab716ccbcb14a89104eb71917379c7ac2a8818dd9c0b66a83edf288bdc532bc19e1f715b12043fb17c6a905b40f0d742530c3c36c4b

    • memory/1292-129-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-131-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-19-0x0000000006A70000-0x0000000006B67000-memory.dmp

      Filesize

      988KB

    • memory/1292-149-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-147-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-145-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-18-0x0000000002690000-0x0000000002693000-memory.dmp

      Filesize

      12KB

    • memory/1292-143-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-141-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-139-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-137-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-135-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-133-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-20-0x0000000006A70000-0x0000000006B67000-memory.dmp

      Filesize

      988KB

    • memory/1292-17-0x0000000002690000-0x0000000002693000-memory.dmp

      Filesize

      12KB

    • memory/1292-127-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-125-0x0000000003B30000-0x0000000003B31000-memory.dmp

      Filesize

      4KB

    • memory/1292-16-0x0000000002690000-0x0000000002693000-memory.dmp

      Filesize

      12KB

    • memory/1292-89-0x0000000006D40000-0x0000000006E0B000-memory.dmp

      Filesize

      812KB

    • memory/1292-90-0x000007FEBEC10000-0x000007FEBEC20000-memory.dmp

      Filesize

      64KB

    • memory/1292-121-0x0000000037120000-0x0000000037130000-memory.dmp

      Filesize

      64KB

    • memory/1936-74-0x0000000000040000-0x00000000000CE000-memory.dmp

      Filesize

      568KB

    • memory/1936-3-0x0000000000040000-0x00000000000CE000-memory.dmp

      Filesize

      568KB

    • memory/2472-39-0x0000000000E30000-0x0000000000EBE000-memory.dmp

      Filesize

      568KB

    • memory/2472-0-0x0000000000E30000-0x0000000000EBE000-memory.dmp

      Filesize

      568KB

    • memory/2472-45-0x0000000000E30000-0x0000000000EBE000-memory.dmp

      Filesize

      568KB

    • memory/2780-37-0x0000000001D20000-0x0000000001DEB000-memory.dmp

      Filesize

      812KB

    • memory/2780-40-0x000007FEBEC10000-0x000007FEBEC20000-memory.dmp

      Filesize

      64KB

    • memory/2780-42-0x0000000000220000-0x0000000000221000-memory.dmp

      Filesize

      4KB

    • memory/2780-41-0x0000000001D20000-0x0000000001DEB000-memory.dmp

      Filesize

      812KB

    • memory/2780-75-0x0000000001D20000-0x0000000001DEB000-memory.dmp

      Filesize

      812KB

    • memory/2780-36-0x0000000000090000-0x0000000000093000-memory.dmp

      Filesize

      12KB

    • memory/2780-32-0x0000000000090000-0x0000000000093000-memory.dmp

      Filesize

      12KB

    • memory/2780-26-0x0000000000060000-0x0000000000061000-memory.dmp

      Filesize

      4KB

    • memory/2780-24-0x0000000000120000-0x00000000001E3000-memory.dmp

      Filesize

      780KB