Analysis

  • max time kernel
    150s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-12-2024 03:04

General

  • Target

    Confirm revised invoice to proceed with payment ASAP.exe

  • Size

    979KB

  • MD5

    b42344ed3b26fedfcafd2a8626557723

  • SHA1

    632b82c943b1c3b293a164df76eb7d94391ba0f7

  • SHA256

    2755e95a38fb5e5b3af3aea557601b9261004a3201219dfb704e28e60a06dfa3

  • SHA512

    ee22dfb0e084ac77050aee6fea65373f71c96f43e7da14655bfa6487bdf2332fc6aa9581927abc2880318513e695c48d355bd1499733dc3a6f850b63a2b8fc4e

  • SSDEEP

    24576:9jwKCNozIZAO5i1XamIP2J5k0++IHsoQastZ1Pkm:V1CiUb5kXN0Kk9+IHXzsnWm

Malware Config

Signatures

  • Guloader family
  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Disables Task Manager via registry modification
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 3 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 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 NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe
    "C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:4564
    • C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe
      "C:\Users\Admin\AppData\Local\Temp\Confirm revised invoice to proceed with payment ASAP.exe"
      2⤵
      • Accesses Microsoft Outlook profiles
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1272

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\nsk9230.tmp\System.dll

    Filesize

    12KB

    MD5

    0d7ad4f45dc6f5aa87f606d0331c6901

    SHA1

    48df0911f0484cbe2a8cdd5362140b63c41ee457

    SHA256

    3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

    SHA512

    c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

  • memory/1272-33-0x0000000036F30000-0x00000000374D4000-memory.dmp

    Filesize

    5.6MB

  • memory/1272-32-0x0000000000480000-0x000000000049E000-memory.dmp

    Filesize

    120KB

  • memory/1272-39-0x0000000037D80000-0x0000000037D8A000-memory.dmp

    Filesize

    40KB

  • memory/1272-16-0x00000000016E0000-0x000000000421A000-memory.dmp

    Filesize

    43.2MB

  • memory/1272-26-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1272-30-0x00000000016E0000-0x000000000421A000-memory.dmp

    Filesize

    43.2MB

  • memory/1272-31-0x0000000000480000-0x00000000016D4000-memory.dmp

    Filesize

    18.3MB

  • memory/1272-38-0x0000000037AF0000-0x0000000037CB2000-memory.dmp

    Filesize

    1.8MB

  • memory/1272-36-0x0000000037A60000-0x0000000037AB0000-memory.dmp

    Filesize

    320KB

  • memory/1272-34-0x00000000374E0000-0x000000003757C000-memory.dmp

    Filesize

    624KB

  • memory/1272-35-0x0000000037990000-0x0000000037A22000-memory.dmp

    Filesize

    584KB

  • memory/4564-13-0x00000000032A0000-0x0000000005DDA000-memory.dmp

    Filesize

    43.2MB

  • memory/4564-14-0x0000000077D81000-0x0000000077EA1000-memory.dmp

    Filesize

    1.1MB

  • memory/4564-15-0x00000000032A0000-0x0000000005DDA000-memory.dmp

    Filesize

    43.2MB