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Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    18/05/2023, 01:57

General

  • Target

    DOCUMENT.exe

  • Size

    306KB

  • MD5

    a814dc37ac7cc706c662194585e4d2a9

  • SHA1

    912c6a6741476eea9621e4c71d3d7ab26ba54e5f

  • SHA256

    49479374e667e0897b7f9a742aea8a795dce57bd2cbb0ad5e601b8b28522f0f0

  • SHA512

    45cc9ea588eb30bd517d60dc749c15d5e4f12d66ca822eac8784e876209125570d61621880ac0206b3c852cf94a881a1c32d0613f315070ffc6f8acfc563ab2c

  • SSDEEP

    6144:Cj20IjUUXgrZc0YuiNNKrDtzo99bYRNMZo6Ku2qP9szt76JyOk4:BNzgZ3YTTgJovbqNMHK32hJyOk4

Malware Config

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Loads dropped DLL 2 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe
    "C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1300
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
      "C:\Users\Admin\AppData\Local\Temp\DOCUMENT.exe"
      2⤵
      • Checks QEMU agent file
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      PID:1492

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\nsy5F9F.tmp\System.dll

    Filesize

    11KB

    MD5

    c9473cb90d79a374b2ba6040ca16e45c

    SHA1

    ab95b54f12796dce57210d65f05124a6ed81234a

    SHA256

    b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352

    SHA512

    eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

  • \Users\Admin\AppData\Local\Temp\nsy5F9F.tmp\System.dll

    Filesize

    11KB

    MD5

    c9473cb90d79a374b2ba6040ca16e45c

    SHA1

    ab95b54f12796dce57210d65f05124a6ed81234a

    SHA256

    b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352

    SHA512

    eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

  • \Users\Admin\AppData\Local\Temp\nsy5F9F.tmp\System.dll

    Filesize

    11KB

    MD5

    c9473cb90d79a374b2ba6040ca16e45c

    SHA1

    ab95b54f12796dce57210d65f05124a6ed81234a

    SHA256

    b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352

    SHA512

    eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b

  • memory/1300-66-0x0000000003E10000-0x0000000006DB6000-memory.dmp

    Filesize

    47.6MB

  • memory/1300-67-0x0000000003E10000-0x0000000006DB6000-memory.dmp

    Filesize

    47.6MB

  • memory/1492-68-0x0000000000820000-0x00000000037C6000-memory.dmp

    Filesize

    47.6MB

  • memory/1492-69-0x0000000000820000-0x00000000037C6000-memory.dmp

    Filesize

    47.6MB

  • memory/1492-70-0x0000000000400000-0x0000000000615000-memory.dmp

    Filesize

    2.1MB