Resubmissions

10-10-2024 02:19

241010-crx4sazhnm 10

Analysis

  • max time kernel
    75s
  • max time network
    135s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10-10-2024 02:19

General

  • Target

    Samples - 10-09-2024/499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe

  • Size

    2.3MB

  • MD5

    634121b2af66dd5433c1155702abc84c

  • SHA1

    f3fd2a1800c4272bdf8209ff47e3703a4923e699

  • SHA256

    499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f

  • SHA512

    60786abdb281fe3f4fc4e242434fb280271684f13b683dc9cd32ac1a6e29ba496cea2c22ee1a82fa9dd6896f6530e9a0c07e2245ee35fc6100f7d684623bc805

  • SSDEEP

    12288:tuEAmDY2kyLG/XModp1HmKwHfX7ZWezHiLfdHcWJWnVMaKo9Nip2IiUlbtgfXD70:cM9y3QvpHiLFcVVMaP9Nip7lbtgfT70

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.fosna.net
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    u;4z3V.Iir1l

Signatures

  • AgentTesla

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

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Looks for VMWare Tools registry key 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Windows security modification 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 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.

  • Maps connected drives based on registry 3 TTPs 2 IoCs

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

  • 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 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Samples - 10-09-2024\499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe
    "C:\Users\Admin\AppData\Local\Temp\Samples - 10-09-2024\499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe"
    1⤵
    • UAC bypass
    • Windows security bypass
    • Looks for VirtualBox Guest Additions in registry
    • Looks for VMWare Tools registry key
    • Checks BIOS information in registry
    • Windows security modification
    • Checks whether UAC is enabled
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:3400
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Samples - 10-09-2024\499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1584
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2336

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uheypwtc.vut.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/1584-22-0x00007FFD23E50000-0x00007FFD24912000-memory.dmp

    Filesize

    10.8MB

  • memory/1584-16-0x0000019F99EE0000-0x0000019F99EF0000-memory.dmp

    Filesize

    64KB

  • memory/1584-17-0x0000019F99EE0000-0x0000019F99EF0000-memory.dmp

    Filesize

    64KB

  • memory/1584-6-0x00007FFD23E50000-0x00007FFD24912000-memory.dmp

    Filesize

    10.8MB

  • memory/1584-5-0x0000019FFFE30000-0x0000019FFFE52000-memory.dmp

    Filesize

    136KB

  • memory/2336-18-0x00000000055D0000-0x0000000005B76000-memory.dmp

    Filesize

    5.6MB

  • memory/2336-4-0x0000000000400000-0x0000000000442000-memory.dmp

    Filesize

    264KB

  • memory/2336-15-0x00000000743EE000-0x00000000743EF000-memory.dmp

    Filesize

    4KB

  • memory/2336-19-0x0000000005120000-0x0000000005186000-memory.dmp

    Filesize

    408KB

  • memory/2336-24-0x0000000006530000-0x00000000065C2000-memory.dmp

    Filesize

    584KB

  • memory/2336-25-0x00000000065D0000-0x0000000006620000-memory.dmp

    Filesize

    320KB

  • memory/2336-26-0x0000000006710000-0x000000000671A000-memory.dmp

    Filesize

    40KB

  • memory/2336-27-0x00000000743EE000-0x00000000743EF000-memory.dmp

    Filesize

    4KB

  • memory/3400-0-0x00007FFD23E53000-0x00007FFD23E55000-memory.dmp

    Filesize

    8KB

  • memory/3400-3-0x000002717FCE0000-0x000002717FD74000-memory.dmp

    Filesize

    592KB

  • memory/3400-2-0x00007FFD23E50000-0x00007FFD24912000-memory.dmp

    Filesize

    10.8MB

  • memory/3400-1-0x000002717EF00000-0x000002717EF18000-memory.dmp

    Filesize

    96KB

  • memory/3400-23-0x00007FFD23E50000-0x00007FFD24912000-memory.dmp

    Filesize

    10.8MB