General

  • Target

    21f1e57607e3734bd31d55b02f3fbb9e.exe

  • Size

    791KB

  • Sample

    230316-rnzkrsbb67

  • MD5

    21f1e57607e3734bd31d55b02f3fbb9e

  • SHA1

    2653db1285efc7b847bb56a4e6a5434b03350ac5

  • SHA256

    6d6a5f70a5f8d597d4074ac0c2d84dd9ed5f41aa39305f4260b831a03bec4569

  • SHA512

    833a04a5edb72e31c5926907f317132c28b1d19be25d6f4fa74292d1da24eeb0f4a72968d0ae79d3c09e4d1e0010196ab92fab4e80385b690e96e28a3adca66c

  • SSDEEP

    24576:eaO+WvtXJNDY+mfQ2p0WGstpe8gNZ4bG58b4H:ex+KZNDvmfd+WGsi4658M

Malware Config

Extracted

Family

cryptbot

C2

http://erniku42.top/gate.php

Attributes
  • payload_url

    http://ovapfa05.top/unfele

Targets

    • Target

      21f1e57607e3734bd31d55b02f3fbb9e.exe

    • Size

      791KB

    • MD5

      21f1e57607e3734bd31d55b02f3fbb9e

    • SHA1

      2653db1285efc7b847bb56a4e6a5434b03350ac5

    • SHA256

      6d6a5f70a5f8d597d4074ac0c2d84dd9ed5f41aa39305f4260b831a03bec4569

    • SHA512

      833a04a5edb72e31c5926907f317132c28b1d19be25d6f4fa74292d1da24eeb0f4a72968d0ae79d3c09e4d1e0010196ab92fab4e80385b690e96e28a3adca66c

    • SSDEEP

      24576:eaO+WvtXJNDY+mfQ2p0WGstpe8gNZ4bG58b4H:ex+KZNDvmfd+WGsi4658M

    • 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