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Analysis

  • max time kernel
    148s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    12/03/2024, 02:06

General

  • Target

    0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe

  • Size

    1.7MB

  • MD5

    d2a38a71e3577e4fbb4185b4ee935376

  • SHA1

    77d2ddc8fe67a720b75fd4027d143018f8c08791

  • SHA256

    0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482

  • SHA512

    3a8dd6797dda6732fff10f02951d940a41e9f3b435ce74dfa266c91c585245a16012f4925bf909932ad03bf7aa6098e4a4d09f1e39a9091541e7793f22c57529

  • SSDEEP

    49152:J60SmMKCWrpP2g/NXrHTvOy3YuaqaI0THZqNPbmvrKLlDqKz:40sKCEPLRrHTG0aq6ZZklDXz

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.145

Attributes
  • url_path

    /3cd2b41cbde8fc9c.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Detect binaries embedding considerable number of MFA browser extension IDs. 7 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 7 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 5 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 7 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.

  • UPX packed file 4 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe
    "C:\Users\Admin\AppData\Local\Temp\0fb249f0b6ea12a9a7e101f8e92cb6708b2c0fbf9de2ce0e88be4d84bf9b3482.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1636
    • C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
      C:\Users\Admin\AppData\Local\Temp\syncUpd.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:2020
    • C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
      C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2484
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Roaming\Temp\Task.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2268
        • C:\Windows\SysWOW64\chcp.com
          chcp 1251
          4⤵
            PID:2440
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn "MalayamaraUpdate" /tr "'C:\Users\Admin\AppData\Local\Temp\Updater.exe'" /sc minute /mo 30 /F
            4⤵
            • Creates scheduled task(s)
            PID:2616

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\BroomSetup.exe

      Filesize

      1.6MB

      MD5

      7cbaa93c4de0138cd777aa9af33f40b1

      SHA1

      e60985baacde89d34cae9b4f9c6ce45e4a4a8f46

      SHA256

      68dfb7c13eef28a78328e4ce8d3deaa5fd81624dae3d83916c34fbdb9e63a229

      SHA512

      cb7b7c80c25dd7411d1057de6bee3eb9cf31916df36045053fa28754b98a5677322e2c79d91ed4fdd22dafadc32f03c83943692ec8c42f5a137b0e13165d0123

    • C:\Users\Admin\AppData\Roaming\Temp\Task.bat

      Filesize

      128B

      MD5

      11bb3db51f701d4e42d3287f71a6a43e

      SHA1

      63a4ee82223be6a62d04bdfe40ef8ba91ae49a86

      SHA256

      6be22058abfb22b40a42fb003f86b89e204a83024c03eb82cd53e2a0a047c331

      SHA512

      907ad2c070cc1db89f43459a94d7f48985d939d749c9648b78572a266f0d3fde47813a129e9151dbf4a7d96d36f588172f57c88b8b947b56ed818d7d068abab2

    • \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

    • \Users\Admin\AppData\Local\Temp\BroomSetup.exe

      Filesize

      1.7MB

      MD5

      af8783c45b707e16314a0396d37d7df6

      SHA1

      0683470f850ad40d2cc9bd23da35919e33e9962f

      SHA256

      dd23328525665f0164194f2f8cbfece40369df97f20a1d09019b7068e80c8f63

      SHA512

      8c12fbcaff981402ff77ae1798a2a93eb4d1bb029fc11121c3f693a6d84971b551929959bff166a2dc3ce89c94edefdae6273993958586d5a7d43833e85b4cdf

    • \Users\Admin\AppData\Local\Temp\nsi1038.tmp\INetC.dll

      Filesize

      21KB

      MD5

      2b342079303895c50af8040a91f30f71

      SHA1

      b11335e1cb8356d9c337cb89fe81d669a69de17e

      SHA256

      2d5d89025911e2e273f90f393624be4819641dbee1606de792362e442e54612f

      SHA512

      550452dadc86ecd205f40668894116790a456fe46e9985d68093d36cf32abf00edecb5c56ff0287464a0e819db7b3cc53926037a116de6c651332a7cc8035d47

    • \Users\Admin\AppData\Local\Temp\syncUpd.exe

      Filesize

      282KB

      MD5

      54e0220b6f9b4f8f64382b71c6033595

      SHA1

      1f599189588a7a174a6b8a4587ae0df5c15bdd6f

      SHA256

      47bccced008024236587fbe59d8419a52888f7b50b01cc6c7dc92101a0885607

      SHA512

      0c4e27554ee5a090f8e8e1fa0b901cc5cc90fb6f1a3fb68c4a991096d8ea53a07e452d1ad119b046107deffe34173b21a5ff2f0062b98ae9b23945ea05ad8708

    • memory/1636-46-0x0000000005480000-0x00000000059B0000-memory.dmp

      Filesize

      5.2MB

    • memory/1636-29-0x0000000000400000-0x000000000043E000-memory.dmp

      Filesize

      248KB

    • memory/1636-31-0x0000000005480000-0x00000000059B0000-memory.dmp

      Filesize

      5.2MB

    • memory/2020-42-0x0000000000400000-0x0000000001A34000-memory.dmp

      Filesize

      22.2MB

    • memory/2020-50-0x0000000061E00000-0x0000000061EF3000-memory.dmp

      Filesize

      972KB

    • memory/2020-122-0x0000000001B60000-0x0000000001C60000-memory.dmp

      Filesize

      1024KB

    • memory/2020-121-0x0000000000400000-0x0000000001A34000-memory.dmp

      Filesize

      22.2MB

    • memory/2020-44-0x0000000001B60000-0x0000000001C60000-memory.dmp

      Filesize

      1024KB

    • memory/2020-16-0x0000000000400000-0x0000000001A34000-memory.dmp

      Filesize

      22.2MB

    • memory/2020-120-0x0000000000400000-0x0000000001A34000-memory.dmp

      Filesize

      22.2MB

    • memory/2020-14-0x0000000001B60000-0x0000000001C60000-memory.dmp

      Filesize

      1024KB

    • memory/2020-83-0x0000000000400000-0x0000000001A34000-memory.dmp

      Filesize

      22.2MB

    • memory/2020-91-0x0000000000400000-0x0000000001A34000-memory.dmp

      Filesize

      22.2MB

    • memory/2020-15-0x0000000000220000-0x0000000000247000-memory.dmp

      Filesize

      156KB

    • memory/2484-33-0x0000000000240000-0x0000000000241000-memory.dmp

      Filesize

      4KB

    • memory/2484-49-0x0000000000240000-0x0000000000241000-memory.dmp

      Filesize

      4KB

    • memory/2484-43-0x0000000000400000-0x0000000000930000-memory.dmp

      Filesize

      5.2MB

    • memory/2484-32-0x0000000000400000-0x0000000000930000-memory.dmp

      Filesize

      5.2MB