General

  • Target

    edf17409efa144282021fcba2b1e5033.exe

  • Size

    791KB

  • Sample

    230317-lg2tnafd99

  • MD5

    edf17409efa144282021fcba2b1e5033

  • SHA1

    62bdbc5f5c0dfecfd35674eaa177a829b0843993

  • SHA256

    50809992588189f6adbe6cfeb6f7c7f5c5722db14f73d13e9bb8eb1b92528710

  • SHA512

    94b1258e387c259873e165916a3f359f6ed2391baad1ab6e0d7af39cb68cc68ec5cd2aebabc60169bf2dd203c491b5ff986b684c3a9dc6c4aeb0049c2b240f89

  • SSDEEP

    12288:hh9ZOqdRHEws20o6hG/MqV1D40X2cWQcPNvW0e784L08rwxCP5F0ZRKH:2qXkqkRScPN+r784LnwxwyiH

Malware Config

Extracted

Family

cryptbot

C2

http://ernwld52.top/gate.php

Targets

    • Target

      edf17409efa144282021fcba2b1e5033.exe

    • Size

      791KB

    • MD5

      edf17409efa144282021fcba2b1e5033

    • SHA1

      62bdbc5f5c0dfecfd35674eaa177a829b0843993

    • SHA256

      50809992588189f6adbe6cfeb6f7c7f5c5722db14f73d13e9bb8eb1b92528710

    • SHA512

      94b1258e387c259873e165916a3f359f6ed2391baad1ab6e0d7af39cb68cc68ec5cd2aebabc60169bf2dd203c491b5ff986b684c3a9dc6c4aeb0049c2b240f89

    • SSDEEP

      12288:hh9ZOqdRHEws20o6hG/MqV1D40X2cWQcPNvW0e784L08rwxCP5F0ZRKH:2qXkqkRScPN+r784LnwxwyiH

    • 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

    • Suspicious use of SetThreadContext

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