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General

  • Target

    Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe

  • Size

    743KB

  • Sample

    230418-mtyhfaah57

  • MD5

    7b2a0af9c2e205c94e844ad81f8a5e28

  • SHA1

    d34260f61c9924d5b930500793cb26790fc1f71e

  • SHA256

    856c8bb75c2b8c79b99f9249c201d20838251a94a4f830afa7995a3af0952842

  • SHA512

    d2fc07067d70257f199b22aac86436528abe6cb111ca300f1405e39a942e55d74b4b7eb16ef2fad748df55861f0ed7f566a2c8205cc1fb50c154b8249720d02d

  • SSDEEP

    12288:y/MiJO0BLWwL/Gl6uldjwUyhhUh/GsE0C3OWQqpiHHsYsr9ws7LB:ytI04YnulW3CO7hOW5SHsYsZwCLB

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot5409839916:AAEYUYZy0IhJQAm4VXi620si4okGW8FDL2w/

Targets

    • Target

      Bestar Steel RFQ 0100423(MECH)NBI April-1423.exe

    • Size

      743KB

    • MD5

      7b2a0af9c2e205c94e844ad81f8a5e28

    • SHA1

      d34260f61c9924d5b930500793cb26790fc1f71e

    • SHA256

      856c8bb75c2b8c79b99f9249c201d20838251a94a4f830afa7995a3af0952842

    • SHA512

      d2fc07067d70257f199b22aac86436528abe6cb111ca300f1405e39a942e55d74b4b7eb16ef2fad748df55861f0ed7f566a2c8205cc1fb50c154b8249720d02d

    • SSDEEP

      12288:y/MiJO0BLWwL/Gl6uldjwUyhhUh/GsE0C3OWQqpiHHsYsr9ws7LB:ytI04YnulW3CO7hOW5SHsYsZwCLB

    • AgentTesla

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

    • 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.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • 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

    • Maps connected drives based on registry

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks