General

  • Target

    5021036673.exe

  • Size

    461KB

  • Sample

    240521-pz3epaec54

  • MD5

    3b7ef5232e11bd43c48fbbcbaada35ab

  • SHA1

    04c1003f6611b769fc7f900d404ac90d550a12ac

  • SHA256

    8476500f6ecba15ee6e50f37c34bf2ccdd4790b42d0a44737d2626dcaa0e2449

  • SHA512

    ef397e10b854bc6ba465717ef7686de5caab0fdd81b8758c89764cdba5e3b058d621562fac2bc3dd59d89e59e44579029b2cc21013bff691b0f88cb72665b9df

  • SSDEEP

    6144:DVwYYaG3c+iS3oBIOokpsEjb2SfjNhuthxCCfBjhpH3565Xnnz/84DP7/V:r+bOxpsUiS7TutDCVF

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    66.29.151.236
  • Port:
    587
  • Username:
    sendahelpde@coleoffice.shop
  • Password:
    s9jjoVvaZchS
  • Email To:
    helpdesk@coleoffice.shop

Extracted

Family

nanocore

Version

1.2.2.0

C2

94.156.68.219:2323

Mutex

687022d0-91f8-4a5a-bf22-c3a2c043d015

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2024-03-02T10:05:36.450504536Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    2323

  • default_group

    21may04

  • enable_debug_mode

    true

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.048576e+07

  • mutex

    687022d0-91f8-4a5a-bf22-c3a2c043d015

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    94.156.68.219

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    true

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    66.29.151.236
  • Port:
    587
  • Username:
    sendahelpde@coleoffice.shop
  • Password:
    s9jjoVvaZchS

Targets

    • Target

      5021036673.exe

    • Size

      461KB

    • MD5

      3b7ef5232e11bd43c48fbbcbaada35ab

    • SHA1

      04c1003f6611b769fc7f900d404ac90d550a12ac

    • SHA256

      8476500f6ecba15ee6e50f37c34bf2ccdd4790b42d0a44737d2626dcaa0e2449

    • SHA512

      ef397e10b854bc6ba465717ef7686de5caab0fdd81b8758c89764cdba5e3b058d621562fac2bc3dd59d89e59e44579029b2cc21013bff691b0f88cb72665b9df

    • SSDEEP

      6144:DVwYYaG3c+iS3oBIOokpsEjb2SfjNhuthxCCfBjhpH3565Xnnz/84DP7/V:r+bOxpsUiS7TutDCVF

    • AgentTesla

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

    • NanoCore

      NanoCore is a remote access tool (RAT) with a variety of capabilities.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Looks up external IP address via web service

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

3
T1552.001

Credentials in Registry

1
T1552.002

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

4
T1005

Tasks