Analysis

  • max time kernel
    147s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-12-2024 04:41

General

  • Target

    fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe

  • Size

    434KB

  • MD5

    8ee319986da68b9b96c808c9f159459a

  • SHA1

    c8fea79c996780d876068e7f50b5f354d690a164

  • SHA256

    fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963

  • SHA512

    00bafa0a476db01d84c8cfd2129ee8dde8615a78b48ec73344a58d239f00455df49e20519050e9fa9bdaa8748eead12d0b5fbf989d2dabd8a36f14ae2dde72a0

  • SSDEEP

    12288:I5AsKs+wNUKZsmy+Si/FwJtyeap2JX+Hu7Jj1JK8s5FEeKZ:ZSLR2myNiFwJqwJXqu7Jj1Jicew

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.

  • Drops file in System32 directory 1 IoCs
  • 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\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
    "C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:3320
    • C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
      "C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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:4336

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\nsr65A0.tmp\System.dll

    Filesize

    11KB

    MD5

    ee260c45e97b62a5e42f17460d406068

    SHA1

    df35f6300a03c4d3d3bd69752574426296b78695

    SHA256

    e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

    SHA512

    a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

  • memory/3320-14-0x0000000002A60000-0x0000000003C58000-memory.dmp

    Filesize

    18.0MB

  • memory/3320-15-0x0000000076E91000-0x0000000076FB1000-memory.dmp

    Filesize

    1.1MB

  • memory/3320-16-0x0000000010004000-0x0000000010005000-memory.dmp

    Filesize

    4KB

  • memory/3320-17-0x0000000002A60000-0x0000000003C58000-memory.dmp

    Filesize

    18.0MB

  • memory/3320-18-0x0000000002A60000-0x0000000003C58000-memory.dmp

    Filesize

    18.0MB

  • memory/4336-19-0x00000000016C0000-0x00000000028B8000-memory.dmp

    Filesize

    18.0MB

  • memory/4336-20-0x0000000076F18000-0x0000000076F19000-memory.dmp

    Filesize

    4KB

  • memory/4336-21-0x0000000076F35000-0x0000000076F36000-memory.dmp

    Filesize

    4KB

  • memory/4336-31-0x00000000016C0000-0x00000000028B8000-memory.dmp

    Filesize

    18.0MB

  • memory/4336-35-0x0000000000460000-0x00000000016B4000-memory.dmp

    Filesize

    18.3MB

  • memory/4336-36-0x0000000000460000-0x00000000016B4000-memory.dmp

    Filesize

    18.3MB

  • memory/4336-37-0x0000000000460000-0x000000000047E000-memory.dmp

    Filesize

    120KB

  • memory/4336-38-0x0000000035730000-0x0000000035CD4000-memory.dmp

    Filesize

    5.6MB

  • memory/4336-39-0x0000000035540000-0x00000000355DC000-memory.dmp

    Filesize

    624KB

  • memory/4336-40-0x0000000035F80000-0x0000000036012000-memory.dmp

    Filesize

    584KB

  • memory/4336-41-0x0000000036020000-0x0000000036070000-memory.dmp

    Filesize

    320KB

  • memory/4336-42-0x0000000076E91000-0x0000000076FB1000-memory.dmp

    Filesize

    1.1MB

  • memory/4336-43-0x00000000361A0000-0x0000000036362000-memory.dmp

    Filesize

    1.8MB

  • memory/4336-44-0x0000000036420000-0x000000003642A000-memory.dmp

    Filesize

    40KB