General

  • Target

    NEW order AST 2021_10_18.xlsx

  • Size

    347KB

  • Sample

    211018-wsnraaebg2

  • MD5

    38ee6efde5143d84cea6a5b73b656317

  • SHA1

    e3371a76b3b849afe330da30a2f7e77aea1aee43

  • SHA256

    c2d4a5449663eaba12f55a56487d731f148f6ff74e977814afcfd57f8584b5b8

  • SHA512

    702402b7e72cf304771e1be396a42d69fe4cfa0eb3f1b67d17ee526c13e5a82b152a491c49aeabecaa373031061d1c52642d7a8e20b87223379f7c1517ee45f4

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.xxltrucck.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    vFguU*i0

Targets

    • Target

      NEW order AST 2021_10_18.xlsx

    • Size

      347KB

    • MD5

      38ee6efde5143d84cea6a5b73b656317

    • SHA1

      e3371a76b3b849afe330da30a2f7e77aea1aee43

    • SHA256

      c2d4a5449663eaba12f55a56487d731f148f6ff74e977814afcfd57f8584b5b8

    • SHA512

      702402b7e72cf304771e1be396a42d69fe4cfa0eb3f1b67d17ee526c13e5a82b152a491c49aeabecaa373031061d1c52642d7a8e20b87223379f7c1517ee45f4

    • AgentTesla

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

    • AgentTesla Payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • 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.

    • Uses the VBS compiler for execution

    • Accesses Microsoft Outlook profiles

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Exploitation for Client Execution

1
T1203

Defense Evasion

Scripting

1
T1064

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