Overview

overview

10

Static

static

1

CTBrowserS...cU.vbs

windows7-x64

10

CTBrowserS...cU.vbs

windows10-2004-x64

10

Sharing

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General

  • Target

    CTBrowserSetup_IzCDcU.vbs

  • Size

    2.6MB

  • Sample

    230219-267dfagc8y

  • MD5

    cd70c03b7ce70dc04864968bd50b6c46

  • SHA1

    83ec5661a1d3290b7dc23021794d0bb55dd09596

  • SHA256

    e9bc9118078c9b521c97543e9b0a13d63c8d09f5289a9892efc40cb64a37cc91

  • SHA512

    a3ede6d7a465708629dfcfdc2d1bebaa5a3359b7e38b0cf1df94587d11c105ed16b18f08a97876384922a96ab72cae18bcd9cd27c82a3921789996f3db959546

  • SSDEEP

    6144:T5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5ktBJy0T0T0TH:tZ1

Score
10/10
guloadernetwirebotnetdiscoverydownloaderpersistenceratstealerupx

Malware Config

Extracted

Language
ps1
Source
URLs
exe.dropper

https://quickcheckx.github.io/quickme/Milieu.snp

Extracted

Family

netwire

C2

104.168.234.121:3360

Attributes
  • activex_autorun

    false

  • copy_executable

    false

  • delete_original

    false

  • host_id

    NewCatch-%Rand%

  • lock_executable

    false

  • offline_keylogger

    false

  • password

    Password

  • registry_autorun

    false

  • use_mutex

    false

Targets

    • Target

      CTBrowserSetup_IzCDcU.vbs

    • Size

      2.6MB

    • MD5

      cd70c03b7ce70dc04864968bd50b6c46

    • SHA1

      83ec5661a1d3290b7dc23021794d0bb55dd09596

    • SHA256

      e9bc9118078c9b521c97543e9b0a13d63c8d09f5289a9892efc40cb64a37cc91

    • SHA512

      a3ede6d7a465708629dfcfdc2d1bebaa5a3359b7e38b0cf1df94587d11c105ed16b18f08a97876384922a96ab72cae18bcd9cd27c82a3921789996f3db959546

    • SSDEEP

      6144:T5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5s5ktBJy0T0T0TH:tZ1

    Score
    10/10
    guloadernetwirebotnetdiscoverydownloaderpersistenceratstealerupx

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • NetWire RAT payload

      rat

    • Netwire

      Netwire is a RAT with main functionalities focused password stealing and keylogging, but also includes remote control capabilities as well.

      botnetstealernetwire

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Modifies Installed Components in the registry

      persistence

    • Checks QEMU agent file

      Checks presence of QEMU agent, possibly to detect virtualization.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Registers COM server for autorun

      persistence

    • UPX packed file

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

      upx

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

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

      discovery

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

3
T1060

Privilege Escalation

Defense Evasion

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Credential Access

Discovery

Query Registry

4
T1012

System Information Discovery

4
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks