General

  • Target

    210416-lf21maw8he_pw_infected.zip

  • Size

    65KB

  • Sample

    210420-7v7zykn12x

  • MD5

    0f9aa937fec7bd299d04e2b86f773604

  • SHA1

    9a0059f9d911dd79ed9c6da150dcbd49fc4668c1

  • SHA256

    95110acd4adb865b07e81e023006891a9da09a0f5851d6c8fae423f018b0a50e

  • SHA512

    5b4350a279ff850a6cdf9b48b27b88056f877f6be1e70db0e1f64778f88fb16ab12bd499a56e57e1594f7635062225ff813014a6f8311aa15654c1f5d09b8ba6

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yandex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    Money@123

Targets

    • Target

      Property Details.pdf.bin

    • Size

      379KB

    • MD5

      3618134640661e484c11406b7bae2aa7

    • SHA1

      55f2fcab1e76b94cfdf8537a3675a65ac764d338

    • SHA256

      4cc9fc3c6c06119543c1f09d6900c35303905b8d8e18ebc6d9d3d8f6a8ff6507

    • SHA512

      a4b30d04d26996aed6738908bec6f32da09e6dd2e1eee971544fe84091ef6faf1325283a58913f6db915d6ad6ba8ebf9177bf692eed7d13cabdf435e7215705b

    • AgentTesla

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

    • Windows security bypass

    • 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 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

    • Maps connected drives based on registry

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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Disabling Security Tools

2
T1089

Modify Registry

3
T1112

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Credentials in Files

2
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

2
T1005

Tasks