General

  • Target

    a577317775b561251841534a18e5d6b052eae8e832933e988b52dcac27dbb204

  • Size

    3.1MB

  • Sample

    210926-vzs4xafahn

  • MD5

    79a69f3118129dd491c8d31844b23f1f

  • SHA1

    884243928b7ba61555ad0fad90dbe14d5e07f091

  • SHA256

    a577317775b561251841534a18e5d6b052eae8e832933e988b52dcac27dbb204

  • SHA512

    0133ccf5f7169fc4238cc90ceedb92625132bf1f2530cb36c7796a31bf5e765418088ef5e94c6f36e7aa98b94506fab6274a0d6c9ad2cac8d003672585644e3b

Malware Config

Targets

    • Target

      a577317775b561251841534a18e5d6b052eae8e832933e988b52dcac27dbb204

    • Size

      3.1MB

    • MD5

      79a69f3118129dd491c8d31844b23f1f

    • SHA1

      884243928b7ba61555ad0fad90dbe14d5e07f091

    • SHA256

      a577317775b561251841534a18e5d6b052eae8e832933e988b52dcac27dbb204

    • SHA512

      0133ccf5f7169fc4238cc90ceedb92625132bf1f2530cb36c7796a31bf5e765418088ef5e94c6f36e7aa98b94506fab6274a0d6c9ad2cac8d003672585644e3b

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks BIOS information in registry

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

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • 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

1
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

3
T1082

Collection

Data from Local System

2
T1005

Tasks