Overview

overview

10

Static

static

3

73267c2a41...8e.exe

windows7-x64

10

73267c2a41...8e.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/01/2024, 23:32

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General

  • Target
    73267c2a412170b3f3df33616b1e1e8e.exe
  • Size 691KB
  • Sample240124-3jrvxabfcn
  • SHA256 4756e7ee03184fc1b29807d6e77c4bb85d0eaaadd064c67b0b4b3a90175229a3
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
44caliberevasionpersistencespywarestealer

Malware Config

Signatures

  • 44Caliber

    An open source infostealer written in C#.

    stealer44caliber
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
    spyware
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Windows directory 3 IoCs
  • 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.

  • Modifies registry class 1 IoCs
  • Runs ping.exe 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 34 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\73267c2a412170b3f3df33616b1e1e8e.exe
    "C:\Users\Admin\AppData\Local\Temp\73267c2a412170b3f3df33616b1e1e8e.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3484
    • C:\Users\Admin\AppData\Local\Temp\Insidious.exe
      "C:\Users\Admin\AppData\Local\Temp\Insidious.exe"
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5080
    • C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe
      "C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:4424
      • C:\Windows\RuntimeBroker.exe
        "C:\Windows\RuntimeBroker.exe"
        3⤵
        • Drops startup file
        • Executes dropped EXE
        • Adds Run key to start application
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4048
        • C:\Windows\SysWOW64\netsh.exe
          netsh firewall add allowedprogram "C:\Windows\RuntimeBroker.exe" "RuntimeBroker.exe" ENABLE
          4⤵
          • Modifies Windows Firewall
          PID:3044
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C ping 1.1.1.1 -n 1 -w 100 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\73267c2a412170b3f3df33616b1e1e8e.exe"& ping 1.1.1.1 -n 1 -w 900 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\73267c2a412170b3f3df33616b1e1e8e.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:676
      • C:\Windows\system32\PING.EXE
        ping 1.1.1.1 -n 1 -w 100
        3⤵
        • Runs ping.exe
        PID:1952
      • C:\Windows\system32\PING.EXE
        ping 1.1.1.1 -n 1 -w 900
        3⤵
        • Runs ping.exe
        PID:2728

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        Process.txt
        • Path C:\ProgramData\44\Process.txt
        • Size 373B
        • SHA256 c5a1f905f951583f5c13d6e4363f03d571fc8b456567b706ebd281d467fc7922
        • MD5 SHA1 SHA512
        Submit Download

        Process.txt
        • Path C:\ProgramData\44\Process.txt
        • Size 1KB
        • SHA256 cb5a8a1f6f5fab261c015030c09fcd2e7d408e4a0da7121fc35c732eb0d29f5a
        • MD5 SHA1 SHA512
        Submit Download

        Process.txt
        • Path C:\ProgramData\44\Process.txt
        • Size 1KB
        • SHA256 be4e6b60295fe717492cea2e23cd77610a8d46b50cc0d3cb9800f2a6d784f3f8
        • MD5 SHA1 SHA512
        Submit Download

        RuntimeBroker.exe.log
        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\RuntimeBroker.exe.log
        • Size 319B
        • SHA256 7341a4a13e81cbb5b7f39ec47bb45f84836b08b8d8e3ea231d2c7dad982094f7
        • MD5 SHA1 SHA512
        Submit Download

        Insidious.exe
        • Path C:\Users\Admin\AppData\Local\Temp\Insidious.exe
        • Size 328KB
        • SHA256 870859b15395ba5c50bffd2e90b230d4ebc890c9ba8f674f87862b22254ec25e
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        RuntimeBroker.exe
        • Path C:\Users\Admin\AppData\Local\Temp\RuntimeBroker.exe
        • Size 260KB
        • SHA256 81634c88831adcb3e44d92ecd2e2a4534b50cf2d7bf001a02d68faa5d9a92bc2
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/3484-3-0x0000000002AC0000-0x0000000002AD0000-memory.dmp
        Download

        memory/3484-2-0x00007FFDEF460000-0x00007FFDEFF21000-memory.dmp
        Download

        memory/3484-1-0x0000000002A10000-0x0000000002AAC000-memory.dmp
        Download

        memory/3484-0-0x0000000000900000-0x00000000009B4000-memory.dmp
        Download

        memory/3484-80-0x00007FFDEF460000-0x00007FFDEFF21000-memory.dmp
        Download

        memory/4048-217-0x0000000074A30000-0x0000000074FE1000-memory.dmp
        Download

        memory/4048-218-0x0000000074A30000-0x0000000074FE1000-memory.dmp
        Download

        memory/4048-220-0x0000000074A30000-0x0000000074FE1000-memory.dmp
        Download

        memory/4424-110-0x0000000074A30000-0x0000000074FE1000-memory.dmp
        Download

        memory/4424-111-0x0000000074A30000-0x0000000074FE1000-memory.dmp
        Download

        memory/4424-216-0x0000000074A30000-0x0000000074FE1000-memory.dmp
        Download

        memory/5080-66-0x00007FFDEF460000-0x00007FFDEFF21000-memory.dmp
        Download

        memory/5080-65-0x00000000001D0000-0x0000000000228000-memory.dmp
        Download

        memory/5080-68-0x000000001AF60000-0x000000001AFCE000-memory.dmp
        Download

        memory/5080-202-0x00007FFDEF460000-0x00007FFDEFF21000-memory.dmp
        Download

        memory/5080-67-0x00000000009D0000-0x00000000009E0000-memory.dmp
        Download