General

  • Target

    PURCHASE ORDER -MINILEC INDIA.doc

  • Size

    809KB

  • Sample

    210120-w2ep9xqrz6

  • MD5

    46f80abc1386f97bb8245d2c716a1c73

  • SHA1

    356a25c462b51d8b1c962901f433f4775801d30f

  • SHA256

    6fdd3e3a66956b79b5fd8e6203b74d002943faa1ef4abd650699a2d9676441ac

  • SHA512

    8bd69717d3d42060ce617bdb57ee3ed264bc727945111bc64af6f6b5f3d045a27757b4cbb038c7382895ea8d9682a95d37a88de8903313f5e938788b5e3cf2f8

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.privateemail.com
  • Port:
    587
  • Username:
    noor.akbari@petrolnas.icu
  • Password:
    @Mexico1.,

Targets

    • Target

      PURCHASE ORDER -MINILEC INDIA.doc

    • Size

      809KB

    • MD5

      46f80abc1386f97bb8245d2c716a1c73

    • SHA1

      356a25c462b51d8b1c962901f433f4775801d30f

    • SHA256

      6fdd3e3a66956b79b5fd8e6203b74d002943faa1ef4abd650699a2d9676441ac

    • SHA512

      8bd69717d3d42060ce617bdb57ee3ed264bc727945111bc64af6f6b5f3d045a27757b4cbb038c7382895ea8d9682a95d37a88de8903313f5e938788b5e3cf2f8

    • AgentTesla

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

    • Modifies WinLogon for persistence

    • Modifies Windows Defender Real-time Protection settings

    • Windows security bypass

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • Blocklisted process makes network request

    • Executes dropped EXE

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Drops startup file

    • 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.

    • Windows security modification

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Exploitation for Client Execution

1
T1203

Persistence

Winlogon Helper DLL

1
T1004

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

6
T1112

Disabling Security Tools

3
T1089

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

6
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

5
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Command and Control

Web Service

1
T1102

Tasks