Analysis

  • max time kernel
    120s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    13-11-2023 08:42

General

  • Target

    Doctors_Recommendation.scr

  • Size

    3.0MB

  • MD5

    c9bf7a5c92aef719f5f04eb70898b443

  • SHA1

    b2dc4cda58699708a4ebfd31d2a7f5828718f1bc

  • SHA256

    81dbad520f8f4d8163e02d7b01866918e8392bb549df2cb73f1b8148f6fd5b51

  • SHA512

    0ff25c1c2938862018b3f995bfe1e699507b02046ba1592538f02b4b497a6165a8fa8f3fb7531faf908f0fc72f8c02ac034961bfb94fe5365ae636912ac5ad9a

  • SSDEEP

    24576:Ku9FGdK/Ho7S+P6/i1iJq3TXC92REo4Q7hvgL:KZdKOS8sw8GRESFK

Malware Config

Signatures

  • Downloads MZ/PE file
  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks installed software on the system 1 TTPs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Doctors_Recommendation.scr
    "C:\Users\Admin\AppData\Local\Temp\Doctors_Recommendation.scr" /S
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2400
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\ProgramData\GCBGCAFIIE.exe"
      2⤵
        PID:2204
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\Temp\Doctors_Recommendation.scr" & del "C:\ProgramData\*.dll"" & exit
        2⤵
        • Deletes itself
        • Suspicious use of WriteProcessMemory
        PID:1672
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 5
          3⤵
          • Delays execution with timeout.exe
          PID:936

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\Cab8E8B.tmp

      Filesize

      61KB

      MD5

      f3441b8572aae8801c04f3060b550443

      SHA1

      4ef0a35436125d6821831ef36c28ffaf196cda15

      SHA256

      6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

      SHA512

      5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

    • C:\Users\Admin\AppData\Local\Temp\Tar8ECD.tmp

      Filesize

      163KB

      MD5

      9441737383d21192400eca82fda910ec

      SHA1

      725e0d606a4fc9ba44aa8ffde65bed15e65367e4

      SHA256

      bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

      SHA512

      7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

    • \ProgramData\mozglue.dll

      Filesize

      593KB

      MD5

      c8fd9be83bc728cc04beffafc2907fe9

      SHA1

      95ab9f701e0024cedfbd312bcfe4e726744c4f2e

      SHA256

      ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

      SHA512

      fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

    • \ProgramData\nss3.dll

      Filesize

      2.0MB

      MD5

      1cc453cdf74f31e4d913ff9c10acdde2

      SHA1

      6e85eae544d6e965f15fa5c39700fa7202f3aafe

      SHA256

      ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

      SHA512

      dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

    • memory/2204-124-0x0000000002230000-0x0000000002231000-memory.dmp

      Filesize

      4KB

    • memory/2400-1-0x0000000000970000-0x0000000000BAA000-memory.dmp

      Filesize

      2.2MB

    • memory/2400-0-0x0000000000970000-0x0000000000BAA000-memory.dmp

      Filesize

      2.2MB

    • memory/2400-51-0x0000000061E00000-0x0000000061EF3000-memory.dmp

      Filesize

      972KB

    • memory/2400-106-0x0000000000970000-0x0000000000BAA000-memory.dmp

      Filesize

      2.2MB