Analysis

  • max time kernel
    146s
  • max time network
    153s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240611-en
  • resource tags

    arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    22-06-2024 00:58

General

  • Target

    c4c0310bc779bb4ba051be5fe124c783a101e9d0ba03e530292e69ab00cd9cea.exe

  • Size

    1.7MB

  • MD5

    bd034ca154769f1df2a8ceb60c204380

  • SHA1

    d8d6680f9cc9728124785426422863e11804bad2

  • SHA256

    c4c0310bc779bb4ba051be5fe124c783a101e9d0ba03e530292e69ab00cd9cea

  • SHA512

    c128f3ba3fe425ea35fc7a20d1f19e8c8f946155f1d14f63d8a8234a1508cc5d7c9926581aa516d9f04e79bdcb625533baf5d7ec0e125d3d1beb4d75d1976bc9

  • SSDEEP

    49152:WiGjOhbTN00JS3M/Hk7C7x1LckfvGYrkQ9E:Wi5fS3M/Hk7CXLc2GYwQG

Malware Config

Extracted

Family

stealc

Botnet

default

C2

http://85.28.47.4

Attributes
  • url_path

    /920475a59bac849d.php

Signatures

  • Stealc

    Stealc is an infostealer written in C++.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Downloads MZ/PE file
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • 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.

  • 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.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c4c0310bc779bb4ba051be5fe124c783a101e9d0ba03e530292e69ab00cd9cea.exe
    "C:\Users\Admin\AppData\Local\Temp\c4c0310bc779bb4ba051be5fe124c783a101e9d0ba03e530292e69ab00cd9cea.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    PID:3092

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Unsecured Credentials

3
T1552

Credentials In Files

3
T1552.001

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\mozglue.dll
    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • C:\ProgramData\nss3.dll
    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

  • memory/3092-0-0x00000000006E0000-0x0000000000D5D000-memory.dmp
    Filesize

    6.5MB

  • memory/3092-1-0x0000000076F06000-0x0000000076F08000-memory.dmp
    Filesize

    8KB

  • memory/3092-2-0x00000000006E1000-0x00000000006F2000-memory.dmp
    Filesize

    68KB

  • memory/3092-3-0x00000000006E0000-0x0000000000D5D000-memory.dmp
    Filesize

    6.5MB

  • memory/3092-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
    Filesize

    972KB

  • memory/3092-76-0x00000000006E0000-0x0000000000D5D000-memory.dmp
    Filesize

    6.5MB