General

  • Target

    dc9f08e33f838dadaccb6146b51f0ef73d9d7c2bc9199dc5d81109f0fd43b1d9

  • Size

    888KB

  • Sample

    220520-2wlnzsbahm

  • MD5

    26ffc9815e94b01ddf5fd0c2661d18d8

  • SHA1

    85e713a4e99f0ee1b4fd8a9d7fce0afdb0527d17

  • SHA256

    dc9f08e33f838dadaccb6146b51f0ef73d9d7c2bc9199dc5d81109f0fd43b1d9

  • SHA512

    bcfa881adb5dc52a516be484dba723bb9eff1b68c2b96adee38fd3ec637e31631eb72c352bd1a2aa109ffa4295c7dbc0a662c57ed930ba7d6f913ed358f8be80

Malware Config

Targets

    • Target

      dc9f08e33f838dadaccb6146b51f0ef73d9d7c2bc9199dc5d81109f0fd43b1d9

    • Size

      888KB

    • MD5

      26ffc9815e94b01ddf5fd0c2661d18d8

    • SHA1

      85e713a4e99f0ee1b4fd8a9d7fce0afdb0527d17

    • SHA256

      dc9f08e33f838dadaccb6146b51f0ef73d9d7c2bc9199dc5d81109f0fd43b1d9

    • SHA512

      bcfa881adb5dc52a516be484dba723bb9eff1b68c2b96adee38fd3ec637e31631eb72c352bd1a2aa109ffa4295c7dbc0a662c57ed930ba7d6f913ed358f8be80

    • AgentTesla

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

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • Drops file in Drivers directory

    • 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 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

    • 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

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks