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Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/01/2024, 14:45

General

  • Target

    JKL-764-JPL-93873637BNSS.SCR.exe

  • Size

    622KB

  • MD5

    136665ccdc5a00ac893337ca535a9b00

  • SHA1

    b711f4996e91585fb28ea367613ae8994bb9dd84

  • SHA256

    b47914d632508339a012e07cc4030b35b25a78665513276c26496affefd01b90

  • SHA512

    b6dd243ddd19ef2f1e3640e58b99ef5f89f8a6e35cd064eb7edc6a2e11b071dcf15c3bcf8d0ea298acc00fac44d7d098c6519c05a785ba3d7da5a2459afd169c

  • SSDEEP

    12288:jhNMKBSfLJ0/OXH3T42AqwYVi8oin1f3EnYb3xl4mrofsMWFsyS:jhaRfKYXTjDVhoA1fPrTMZyS

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 2 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
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JKL-764-JPL-93873637BNSS.SCR.exe
    "C:\Users\Admin\AppData\Local\Temp\JKL-764-JPL-93873637BNSS.SCR.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:3564
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe
      "C:\Users\Admin\AppData\Local\Temp\JKL-764-JPL-93873637BNSS.SCR.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2540
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2540 -s 2576
        3⤵
        • Program crash
        PID:2132
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 2540 -ip 2540
    1⤵
      PID:4448

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\nsy4F1C.tmp\System.dll

      Filesize

      12KB

      MD5

      0d7ad4f45dc6f5aa87f606d0331c6901

      SHA1

      48df0911f0484cbe2a8cdd5362140b63c41ee457

      SHA256

      3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

      SHA512

      c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

    • memory/2540-43-0x0000000000970000-0x0000000001BC4000-memory.dmp

      Filesize

      18.3MB

    • memory/2540-27-0x0000000077928000-0x0000000077929000-memory.dmp

      Filesize

      4KB

    • memory/2540-28-0x00000000778A1000-0x00000000779C1000-memory.dmp

      Filesize

      1.1MB

    • memory/2540-30-0x0000000000970000-0x0000000001BC4000-memory.dmp

      Filesize

      18.3MB

    • memory/2540-44-0x0000000000970000-0x00000000009B2000-memory.dmp

      Filesize

      264KB

    • memory/2540-45-0x00000000745A0000-0x0000000074D50000-memory.dmp

      Filesize

      7.7MB

    • memory/2540-46-0x00000000382D0000-0x0000000038874000-memory.dmp

      Filesize

      5.6MB

    • memory/2540-47-0x00000000355D0000-0x00000000355E0000-memory.dmp

      Filesize

      64KB

    • memory/2540-48-0x0000000037E90000-0x0000000037EF6000-memory.dmp

      Filesize

      408KB

    • memory/2540-51-0x00000000745A0000-0x0000000074D50000-memory.dmp

      Filesize

      7.7MB

    • memory/3564-26-0x00000000744F0000-0x00000000744F7000-memory.dmp

      Filesize

      28KB

    • memory/3564-25-0x00000000778A1000-0x00000000779C1000-memory.dmp

      Filesize

      1.1MB