Analysis

  • max time kernel
    128s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/08/2023, 06:44

General

  • Target

    WB Documents No-285380XXX.exe

  • Size

    299KB

  • MD5

    ea503ada337d9eb0a65a43df7de04256

  • SHA1

    0168df2069b1cce3924cdb29d8be7b46c3b2cdec

  • SHA256

    6065cbb9fb0ae29dbdeca23edc1869c329d71fa17cce27daead9fdfec4b48c42

  • SHA512

    1b241d77e6642584635add27db901ef04667cb8dc6892797bba6f7ac2e80bb72e7aae5275b9b94f8ad7660da163b2d86526df12d326861cb6697f5370e13bcf5

  • SSDEEP

    6144:TQ606x7lsJ88LxX9BLPQtAfFADvrHdwJzYTFETjPPtzETIKZFFRh:368sxX9Jb6fqYTFETjPP+FF5

Score
10/10

Malware Config

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Checks QEMU agent file 2 TTPs 1 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

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

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

  • Program crash 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\WB Documents No-285380XXX.exe
    "C:\Users\Admin\AppData\Local\Temp\WB Documents No-285380XXX.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    PID:4344
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4344 -s 1044
      2⤵
      • Program crash
      PID:1340
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4344 -ip 4344
    1⤵
      PID:2216

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\nswB065.tmp\System.dll

            Filesize

            11KB

            MD5

            9625d5b1754bc4ff29281d415d27a0fd

            SHA1

            80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

            SHA256

            c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

            SHA512

            dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

          • C:\Users\Admin\AppData\Local\Temp\nswB065.tmp\System.dll

            Filesize

            11KB

            MD5

            9625d5b1754bc4ff29281d415d27a0fd

            SHA1

            80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

            SHA256

            c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

            SHA512

            dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

          • C:\Users\Admin\AppData\Local\Temp\nswB065.tmp\System.dll

            Filesize

            11KB

            MD5

            9625d5b1754bc4ff29281d415d27a0fd

            SHA1

            80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

            SHA256

            c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

            SHA512

            dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

          • memory/4344-144-0x0000000002A80000-0x0000000005983000-memory.dmp

            Filesize

            47.0MB

          • memory/4344-145-0x0000000077E31000-0x0000000077F51000-memory.dmp

            Filesize

            1.1MB

          • memory/4344-146-0x0000000002A80000-0x0000000005983000-memory.dmp

            Filesize

            47.0MB