General

  • Target

    01fa8fae5458ea9957a3bb12dcbd11e4.exe

  • Size

    795KB

  • Sample

    230314-erx5wsfc9t

  • MD5

    01fa8fae5458ea9957a3bb12dcbd11e4

  • SHA1

    5bcbe5b6a5b2b68ae4161514e74b47166d7a1c2b

  • SHA256

    daf7181b5562f37fcbcbb6a56b9d24f8ab7e13671f005b4827dae547e875c146

  • SHA512

    b112f312accb42499421adf78662dc03d1a7de6f961ff0f884586cfec4a791db968d355925fc25ab8bb4fea748ada5e8f4b5d2d5c2852a86ec1f6eb93a6a2730

  • SSDEEP

    24576:cDk1HdvLQ7bpaCIOfCgyx5sNWwwY+eP7H:cOOYayzPwVL

Malware Config

Extracted

Family

cryptbot

C2

http://ernjxs12.top/gate.php

Attributes
  • payload_url

    http://ovaxlo01.top/chavez.dat

Targets

    • Target

      01fa8fae5458ea9957a3bb12dcbd11e4.exe

    • Size

      795KB

    • MD5

      01fa8fae5458ea9957a3bb12dcbd11e4

    • SHA1

      5bcbe5b6a5b2b68ae4161514e74b47166d7a1c2b

    • SHA256

      daf7181b5562f37fcbcbb6a56b9d24f8ab7e13671f005b4827dae547e875c146

    • SHA512

      b112f312accb42499421adf78662dc03d1a7de6f961ff0f884586cfec4a791db968d355925fc25ab8bb4fea748ada5e8f4b5d2d5c2852a86ec1f6eb93a6a2730

    • SSDEEP

      24576:cDk1HdvLQ7bpaCIOfCgyx5sNWwwY+eP7H:cOOYayzPwVL

    • 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