General

  • Target

    PO#00091INV0091520 Order Xls.zip

  • Size

    655KB

  • Sample

    210727-5axrevzqms

  • MD5

    a5fb145100040936caa20cdae0b6dbf0

  • SHA1

    292dd73b882416fe2f61c953f86ec4aa8d9f866b

  • SHA256

    43dbcacfc91061df23d7862ad57d7459b4cbe5fded87d0fbb5150020b5f78288

  • SHA512

    dd4d2700439e6b6e128a352921525ffb9f53ed22af2768615733e25b582590c40115e3d54f32cf95ae35ad88a71580fd7747288cae5b253e6f43b15fa5afbb0d

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.mmdqatar.com/
  • Port:
    21
  • Username:
    mmdq@mmdqatar.com
  • Password:
    Mm.101010

Targets

    • Target

      PO#00091INV0091520 Order Xls.exe

    • Size

      1012KB

    • MD5

      048e0d3fbf217e603792772855a896a7

    • SHA1

      2fa623d84b3659d3b4d56128a56e8edda3bfc6e6

    • SHA256

      c8dcbb164b27470300742804ee02be7412dcf39ccf1d976baa8a0a3c160103db

    • SHA512

      de1087a484dd7aa20e8c0e9e7b713d7ad290c551db8dc79fc6d795abd68fa4d82265fde884e63d81f424dab17d39a6c1de7d63434dd199e4e66c75b1e63fd0fa

    • 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.

    • 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

Tasks