General

  • Target

    pnlfui.xlsm

  • Size

    430KB

  • Sample

    230315-cy53zada4v

  • MD5

    4b222ff63ba4a27646751b5dadfd3ed7

  • SHA1

    4786533018798fbbb3083910b2459a80b3e60258

  • SHA256

    37eb0640c85ef74c91b533f1fc7cc1ac9584d648330e105fb37b4231f885576c

  • SHA512

    acbfccde01fde8e1ea84d5b7bca67774275f19c5ad4f4b23da340fec651f92998cbbb12937aefd82f9c13d97bb4d3574bf49ad4918d4aebd3f3403266ea7f4a6

  • SSDEEP

    12288:HfMXQu7SHOCZhSTIS2dGpeWpqivD1YxR25O8UA:HNwarmMSAGMID1R5OtA

Malware Config

Extracted

Family

agenttesla

Credentials

Targets

    • Target

      pnlfui.xlsm

    • Size

      430KB

    • MD5

      4b222ff63ba4a27646751b5dadfd3ed7

    • SHA1

      4786533018798fbbb3083910b2459a80b3e60258

    • SHA256

      37eb0640c85ef74c91b533f1fc7cc1ac9584d648330e105fb37b4231f885576c

    • SHA512

      acbfccde01fde8e1ea84d5b7bca67774275f19c5ad4f4b23da340fec651f92998cbbb12937aefd82f9c13d97bb4d3574bf49ad4918d4aebd3f3403266ea7f4a6

    • SSDEEP

      12288:HfMXQu7SHOCZhSTIS2dGpeWpqivD1YxR25O8UA:HNwarmMSAGMID1R5OtA

    • AgentTesla

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

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • 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.

    • Accesses Microsoft Outlook profiles

    • 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 v6

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks