Analysis

  • max time kernel
    175s
  • max time network
    190s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-11-2022 04:17

General

  • Target

    e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905.exe

  • Size

    595KB

  • MD5

    783d2bea764af0c2a775b197a5c2ccc6

  • SHA1

    36f287818b5fb3c703a9b5d6f1790b372b896b68

  • SHA256

    e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905

  • SHA512

    781edd5e2c37415cbc386d8af6a09f023794cc1c530ab7ff78cb9952fc4cebfa62b7c881d8158c6bbc4a00a88bf1ec972791d750cc5cd398d88ee1a318e52e0f

  • SSDEEP

    12288:/3k6NsIiLy413Nm2UX+O7FsRYMIAJk8DfCjetsb4XMPfOV:vk6VieGNK+ajMhDfJmb4XeOV

Malware Config

Signatures

  • HawkEye

    HawkEye is a malware kit that has seen continuous development since at least 2013.

  • NirSoft MailPassView 8 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 4 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 8 IoCs
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905.exe
    "C:\Users\Admin\AppData\Local\Temp\e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:2460
    • C:\Users\Admin\AppData\Local\Temp\e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905.exe
      "C:\Users\Admin\AppData\Local\Temp\e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:480
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holdermail.txt"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:4984
    • C:\Users\Admin\AppData\Local\Temp\csrss.exe
      "C:\Users\Admin\AppData\Local\Temp\csrss.exe" -keyhide -prochide 480 -reg C:\Users\Admin\AppData\Local\Temp\e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905.exe -proc 480 C:\Users\Admin\AppData\Local\Temp\e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905.exe
      2⤵
      • Executes dropped EXE
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:8

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\csrss.exe

    Filesize

    595KB

    MD5

    783d2bea764af0c2a775b197a5c2ccc6

    SHA1

    36f287818b5fb3c703a9b5d6f1790b372b896b68

    SHA256

    e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905

    SHA512

    781edd5e2c37415cbc386d8af6a09f023794cc1c530ab7ff78cb9952fc4cebfa62b7c881d8158c6bbc4a00a88bf1ec972791d750cc5cd398d88ee1a318e52e0f

  • C:\Users\Admin\AppData\Local\Temp\csrss.exe

    Filesize

    595KB

    MD5

    783d2bea764af0c2a775b197a5c2ccc6

    SHA1

    36f287818b5fb3c703a9b5d6f1790b372b896b68

    SHA256

    e555821b5492a3b516940e156657860f00ce034c2149b101e18fb59112ff4905

    SHA512

    781edd5e2c37415cbc386d8af6a09f023794cc1c530ab7ff78cb9952fc4cebfa62b7c881d8158c6bbc4a00a88bf1ec972791d750cc5cd398d88ee1a318e52e0f

  • memory/8-145-0x0000000074B60000-0x0000000075111000-memory.dmp

    Filesize

    5.7MB

  • memory/8-143-0x0000000074B60000-0x0000000075111000-memory.dmp

    Filesize

    5.7MB

  • memory/480-144-0x0000000074B60000-0x0000000075111000-memory.dmp

    Filesize

    5.7MB

  • memory/480-136-0x0000000000400000-0x0000000000484000-memory.dmp

    Filesize

    528KB

  • memory/480-138-0x0000000074B60000-0x0000000075111000-memory.dmp

    Filesize

    5.7MB

  • memory/480-135-0x0000000000400000-0x0000000000484000-memory.dmp

    Filesize

    528KB

  • memory/480-134-0x0000000000400000-0x0000000000484000-memory.dmp

    Filesize

    528KB

  • memory/2460-142-0x0000000074B60000-0x0000000075111000-memory.dmp

    Filesize

    5.7MB

  • memory/2460-132-0x0000000074B60000-0x0000000075111000-memory.dmp

    Filesize

    5.7MB

  • memory/4984-147-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/4984-149-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/4984-150-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB