Resubmissions

07-12-2023 10:02

231207-l29p1ahc22 7

04-04-2023 05:12

230404-fvwlxada77 10

General

  • Target

    file.exe

  • Size

    3MB

  • Sample

    230404-fvwlxada77

  • MD5

    6b6e642008b3520c943b073789aabe46

  • SHA1

    91c0c61dceec5b4573db84c3886e2735b64328c0

  • SHA256

    a059eaa580bbbfa5e2964a0a7a8cf4a40d0bba9df017e05fa1e3c6f408725476

  • SHA512

    d884ec35d9964893bcc51c0c83192ab18e2f7be8642d1efeb36ca566b7528f35627ccc443cc5161f2d03cf30089b497a229cfb0b6b13eb3f669b44eae6020b69

  • SSDEEP

    49152:hq7I/sBYOo8Ky+hCsGEYJ0fhqcLw3/kj41wrtoK9CDbrqTvePiyLH3AucrpH:hq7IoYRQzJHcslDDOeqVH

Malware Config

Targets

    • Target

      file.exe

    • Size

      3MB

    • MD5

      6b6e642008b3520c943b073789aabe46

    • SHA1

      91c0c61dceec5b4573db84c3886e2735b64328c0

    • SHA256

      a059eaa580bbbfa5e2964a0a7a8cf4a40d0bba9df017e05fa1e3c6f408725476

    • SHA512

      d884ec35d9964893bcc51c0c83192ab18e2f7be8642d1efeb36ca566b7528f35627ccc443cc5161f2d03cf30089b497a229cfb0b6b13eb3f669b44eae6020b69

    • SSDEEP

      49152:hq7I/sBYOo8Ky+hCsGEYJ0fhqcLw3/kj41wrtoK9CDbrqTvePiyLH3AucrpH:hq7IoYRQzJHcslDDOeqVH

    • CryptBot

      A C++ stealer distributed widely in bundle with other software.

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

    • 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.

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • 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

    • Maps connected drives based on registry

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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

6
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

6
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

2
T1005

Tasks