Analysis

  • max time kernel
    144s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    06/05/2022, 08:41

General

  • Target
    e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe
  • Size 12.0MB
  • Sample220506-klen9acdbj
  • SHA256 e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Executes dropped EXE 6 IoCs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Loads dropped DLL 8 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Themida packer 9 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

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

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe
    "C:\Users\Admin\AppData\Local\Temp\e51d5a34e88b31078df596dfc8a162c2cd2a0d4e3d3e8228301e3cec9f88d22c.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1632
    • C:\Users\Admin\AppData\Local\Temp\modest-update.exe
      "C:\Users\Admin\AppData\Local\Temp\modest-update.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Loads dropped DLL
      • Maps connected drives based on registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1924
      • C:\Users\Admin\AppData\RoaminggttJPGtUJp.exe
        "C:\Users\Admin\AppData\RoaminggttJPGtUJp.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:848
        • C:\Users\Admin\AppData\Roaming\ServiceApi\MicrosoftApi.exe
          "C:\Users\Admin\AppData\Roaming\ServiceApi\MicrosoftApi.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1144
          • C:\Windows\system32\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8E.tmp.cmd""
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:928
            • C:\Windows\system32\timeout.exe
              timeout 4
              6⤵
              • Delays execution with timeout.exe
              PID:1392
            • C:\Windows\system32\schtasks.exe
              schtasks.exe /create /f /sc MINUTE /mo 1 /tn "MicrosoftApi" /tr "'C:\Users\Admin\AppData\Roaming\ServiceApi\MicrosoftApi.exe"'
              6⤵
              • Creates scheduled task(s)
              PID:1972
    • C:\Users\Admin\AppData\Local\Temp\modest-menu.exe
      "C:\Users\Admin\AppData\Local\Temp\modest-menu.exe"
      2⤵
      • Executes dropped EXE
      • Checks BIOS information in registry
      • Checks whether UAC is enabled
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      PID:1420
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {0772D710-54E8-4E7D-9F64-E33F4E17A84C} S-1-5-21-2277218442-1199762539-2004043321-1000:AUVQQRRF\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1548
    • C:\Users\Admin\AppData\Roaming\ServiceApi\MicrosoftApi.exe
      C:\Users\Admin\AppData\Roaming\ServiceApi\MicrosoftApi.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:860

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        modest-menu.exe

        • Path C:\Users\Admin\AppData\Local\Temp\modest-menu.exe
        • Size 10.8MB
        • SHA256 20586c23808706e7bf6cf24a37fb5c30195bc02d595f92e43b78760bc14d7366
        • MD5 SHA1 SHA512 SSDEEP

        modest-menu.exe

        • Path C:\Users\Admin\AppData\Local\Temp\modest-menu.exe
        • Size 10.8MB
        • SHA256 20586c23808706e7bf6cf24a37fb5c30195bc02d595f92e43b78760bc14d7366
        • MD5 SHA1 SHA512 SSDEEP

        modest-update.exe

        • Path C:\Users\Admin\AppData\Local\Temp\modest-update.exe
        • Size 1.4MB
        • SHA256 1b5ae550c7aaa211a5964cded7cf7752400467513a66643076e3723d868afbcb
        • MD5 SHA1 SHA512 SSDEEP

        modest-update.exe

        • Path C:\Users\Admin\AppData\Local\Temp\modest-update.exe
        • Size 1.4MB
        • SHA256 1b5ae550c7aaa211a5964cded7cf7752400467513a66643076e3723d868afbcb
        • MD5 SHA1 SHA512 SSDEEP

        tmp8E.tmp.cmd

        • Path C:\Users\Admin\AppData\Local\Temp\tmp8E.tmp.cmd
        • Size 256B
        • SHA256 3684f65e9055a711d5a15afd4256fe498bd6a4d748718edb56fbe80ac0783b7c
        • MD5 SHA1 SHA512

        MicrosoftApi.exe

        • Path C:\Users\Admin\AppData\Roaming\ServiceApi\MicrosoftApi.exe
        • Size 165KB
        • SHA256 2b3b33557fe9b753e3c536b913e68b4230772161d83bc2bf00f5f4ef4a37278b
        • MD5 SHA1 SHA512 SSDEEP

        MicrosoftApi.exe

        • Path C:\Users\Admin\AppData\Roaming\ServiceApi\MicrosoftApi.exe
        • Size 165KB
        • SHA256 2b3b33557fe9b753e3c536b913e68b4230772161d83bc2bf00f5f4ef4a37278b
        • MD5 SHA1 SHA512 SSDEEP

        MicrosoftApi.exe

        • Path C:\Users\Admin\AppData\Roaming\ServiceApi\MicrosoftApi.exe
        • Size 165KB
        • SHA256 2b3b33557fe9b753e3c536b913e68b4230772161d83bc2bf00f5f4ef4a37278b
        • MD5 SHA1 SHA512 SSDEEP

        RoaminggttJPGtUJp.exe

        • Path C:\Users\Admin\AppData\RoaminggttJPGtUJp.exe
        • Size 165KB
        • SHA256 2b3b33557fe9b753e3c536b913e68b4230772161d83bc2bf00f5f4ef4a37278b
        • MD5 SHA1 SHA512 SSDEEP

        RoaminggttJPGtUJp.exe

        • Path C:\Users\Admin\AppData\RoaminggttJPGtUJp.exe
        • Size 165KB
        • SHA256 2b3b33557fe9b753e3c536b913e68b4230772161d83bc2bf00f5f4ef4a37278b
        • MD5 SHA1 SHA512 SSDEEP

        modest-menu.exe

        • Path \Users\Admin\AppData\Local\Temp\modest-menu.exe
        • Size 10.8MB
        • SHA256 20586c23808706e7bf6cf24a37fb5c30195bc02d595f92e43b78760bc14d7366
        • MD5 SHA1 SHA512 SSDEEP

        modest-menu.exe

        • Path \Users\Admin\AppData\Local\Temp\modest-menu.exe
        • Size 10.8MB
        • SHA256 20586c23808706e7bf6cf24a37fb5c30195bc02d595f92e43b78760bc14d7366
        • MD5 SHA1 SHA512 SSDEEP

        modest-menu.exe

        • Path \Users\Admin\AppData\Local\Temp\modest-menu.exe
        • Size 10.8MB
        • SHA256 20586c23808706e7bf6cf24a37fb5c30195bc02d595f92e43b78760bc14d7366
        • MD5 SHA1 SHA512 SSDEEP

        modest-update.exe

        • Path \Users\Admin\AppData\Local\Temp\modest-update.exe
        • Size 1.4MB
        • SHA256 1b5ae550c7aaa211a5964cded7cf7752400467513a66643076e3723d868afbcb
        • MD5 SHA1 SHA512 SSDEEP

        modest-update.exe

        • Path \Users\Admin\AppData\Local\Temp\modest-update.exe
        • Size 1.4MB
        • SHA256 1b5ae550c7aaa211a5964cded7cf7752400467513a66643076e3723d868afbcb
        • MD5 SHA1 SHA512 SSDEEP

        modest-update.exe

        • Path \Users\Admin\AppData\Local\Temp\modest-update.exe
        • Size 1.4MB
        • SHA256 1b5ae550c7aaa211a5964cded7cf7752400467513a66643076e3723d868afbcb
        • MD5 SHA1 SHA512 SSDEEP

        modest-update.exe

        • Path \Users\Admin\AppData\Local\Temp\modest-update.exe
        • Size 1.4MB
        • SHA256 1b5ae550c7aaa211a5964cded7cf7752400467513a66643076e3723d868afbcb
        • MD5 SHA1 SHA512 SSDEEP

        MicrosoftApi.exe

        • Path \Users\Admin\AppData\Roaming\ServiceApi\MicrosoftApi.exe
        • Size 165KB
        • SHA256 2b3b33557fe9b753e3c536b913e68b4230772161d83bc2bf00f5f4ef4a37278b
        • MD5 SHA1 SHA512 SSDEEP

        RoaminggttJPGtUJp.exe

        • Path \Users\Admin\AppData\RoaminggttJPGtUJp.exe
        • Size 165KB
        • SHA256 2b3b33557fe9b753e3c536b913e68b4230772161d83bc2bf00f5f4ef4a37278b
        • MD5 SHA1 SHA512 SSDEEP

        memory/848-81-0x0000000000B80000-0x0000000000BAE000-memory.dmp

        memory/848-82-0x000007FEFB751000-0x000007FEFB753000-memory.dmp

        memory/860-94-0x00000000002D0000-0x00000000002FE000-memory.dmp

        memory/1144-87-0x0000000000C30000-0x0000000000C5E000-memory.dmp

        memory/1420-72-0x000000013F9D0000-0x000000014152B000-memory.dmp

        memory/1420-70-0x000000013F9D0000-0x000000014152B000-memory.dmp

        memory/1420-71-0x000000013F9D0000-0x000000014152B000-memory.dmp

        memory/1420-69-0x0000000076ED0000-0x0000000077079000-memory.dmp

        memory/1420-74-0x000000013F9D0000-0x000000014152B000-memory.dmp

        memory/1632-54-0x0000000075541000-0x0000000075543000-memory.dmp

        memory/1924-73-0x0000000000670000-0x00000000006C2000-memory.dmp

        memory/1924-76-0x0000000004E15000-0x0000000004E26000-memory.dmp

        memory/1924-66-0x00000000001E0000-0x000000000020A000-memory.dmp