General

  • Target

    PO.8956.arj

  • Size

    475KB

  • Sample

    211022-jkykasbcd4

  • MD5

    11d8ac6872e9887b004aa4a5ef191c6d

  • SHA1

    3578536f235b21d0af144c17d585ac371a016c30

  • SHA256

    538116d5dfc2c8b74a74ebf1b7d1b77bc66ef92613983c69c6987cc888935550

  • SHA512

    8f39a8da4283ff18fbe98bf173aba64af39b88d973f4f62cd952d7237d56dfeae9c211e0ac2b8faefd384742529987d1ec4444409898210c7d6d8b8c7cd764bb

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.gmail.com
  • Port:
    587
  • Username:
    ku0385547@gmail.com
  • Password:
    iambless@070

Targets

    • Target

      PO.8956.exe

    • Size

      843KB

    • MD5

      8d6bf73a7448adf11ca5f2cf766a9898

    • SHA1

      6c157b632a674b4d257d8bcf0fbc4f827a3861fc

    • SHA256

      71e6a270b356bc75968b35c54dc53c7b0ce03519e8fbd1821814438810b84e51

    • SHA512

      ba9b60b0e4d4a1aa42c81e11a2e9c046c664f3447d34b846356d8ca692972ac6285c721fc401816686c720ec6ad26425f8820c45e94712ea2c35d6e32cac1f5d

    • AgentTesla

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

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

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

    • 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

    • Adds Run key to start application

    • Maps connected drives based on registry

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks