General

  • Target

    DC-330NC.xlsx

  • Size

    228KB

  • Sample

    211202-krmbaadeem

  • MD5

    a5ca1f78702e99f9a90f20a93696e4a7

  • SHA1

    b6832ff73a8b940241ab0436996d0db5d2e82839

  • SHA256

    50062c8d61b8fc4e1cdf55d30bf574c0ec9e616d1c6b245927266a1bce98beb8

  • SHA512

    1d6305e34fcb4e6d803f55606506ca458a60583b2276e50696e7c1aa6c5fa8f8dc9818e85ff14d6194a75d1bf4c59e5f2c0e9f7d012961fde214a3b91fe20a9e

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.1and1.it
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Valico07*

Targets

    • Target

      DC-330NC.xlsx

    • Size

      228KB

    • MD5

      a5ca1f78702e99f9a90f20a93696e4a7

    • SHA1

      b6832ff73a8b940241ab0436996d0db5d2e82839

    • SHA256

      50062c8d61b8fc4e1cdf55d30bf574c0ec9e616d1c6b245927266a1bce98beb8

    • SHA512

      1d6305e34fcb4e6d803f55606506ca458a60583b2276e50696e7c1aa6c5fa8f8dc9818e85ff14d6194a75d1bf4c59e5f2c0e9f7d012961fde214a3b91fe20a9e

    • AgentTesla

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

    • Modifies WinLogon for persistence

    • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

      suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    • AgentTesla Payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • 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

Persistence

Winlogon Helper DLL

1
T1004

Defense Evasion

Modify Registry

2
T1112

Scripting

1
T1064

Credential Access

Credentials in Files

3
T1081

Discovery

System Information Discovery

3
T1082

Query Registry

2
T1012

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks