General

  • Target

    66c79a76985d9a042eda6535046facec.exe

  • Size

    3MB

  • Sample

    230420-pjbl2abg7s

  • MD5

    66c79a76985d9a042eda6535046facec

  • SHA1

    38344d1a2caf5b84f2ad83bffb2871c4bc1d6d74

  • SHA256

    6edd78f3fea0c0981a1ec2756046e3b2f872a0e825ace0416f63f267188ed32c

  • SHA512

    df7386d11eba0021ac770ec1c8616f189987092b063ddb5c5c2b15c6627c73cc3761e77e6240e74c4bd74089ec046f6abe9f9c9af4f548c3802c8d07129c1f06

  • SSDEEP

    49152:zlf6Ni4b37vgMeDnoadA6n2mdBfQeQKjkAugZF41iv4xEfNAiBxV+VhLPIV2:l6NbrxN69dBPQKjlfva8OhE2

Malware Config

Extracted

Family

cryptbot

C2

http://fygaoy42.top/gate.php

Targets

    • Target

      66c79a76985d9a042eda6535046facec.exe

    • Size

      3MB

    • MD5

      66c79a76985d9a042eda6535046facec

    • SHA1

      38344d1a2caf5b84f2ad83bffb2871c4bc1d6d74

    • SHA256

      6edd78f3fea0c0981a1ec2756046e3b2f872a0e825ace0416f63f267188ed32c

    • SHA512

      df7386d11eba0021ac770ec1c8616f189987092b063ddb5c5c2b15c6627c73cc3761e77e6240e74c4bd74089ec046f6abe9f9c9af4f548c3802c8d07129c1f06

    • SSDEEP

      49152:zlf6Ni4b37vgMeDnoadA6n2mdBfQeQKjkAugZF41iv4xEfNAiBxV+VhLPIV2:l6NbrxN69dBPQKjlfva8OhE2

    • 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