General

  • Target

    81c1a4c3135df84530588d812b9c860b.bin

  • Size

    686KB

  • Sample

    230313-m1t4laaa67

  • MD5

    8d0c1bd0f3438f48727630462aa2f207

  • SHA1

    a31f0650026f0fc7ca79f8aee33258f7d6cebfd1

  • SHA256

    6db46a415105be7b2100d831c76616ce2ccce65a8a0b84b9e8fe8d74e25385b0

  • SHA512

    463a21d7aa486aa4715114ef303bf477e9c7b759cd1dad22547219f136f5f87ca9287e98e945b4b390dae433bf84cec0698a8ee88a8ff39fbcebc6944f34cdc1

  • SSDEEP

    12288:R+KdkTCfiCej2g9gnVRbU21N1jM4DBZ2P1F4na4oK9:R+KdkmuR+bUStfWn4b

Malware Config

Extracted

Family

cryptbot

C2

http://lahxam72.top/gate.php

Attributes
  • payload_url

    http://ahowyg10.top/phylum.dat

Targets

    • Target

      3654fad9d471a913d6a4e4669c4cf6d0d93c35218d35793db325079a9f2bcb31.exe

    • Size

      795KB

    • MD5

      81c1a4c3135df84530588d812b9c860b

    • SHA1

      d98e1eade1b6d333716cf47015e22208e04d4cd3

    • SHA256

      3654fad9d471a913d6a4e4669c4cf6d0d93c35218d35793db325079a9f2bcb31

    • SHA512

      92958f6899b357bf5014e7a547ef9e50af76607bd8bd9d737eb94c20283bff91a60cbbea8869820ebab816770f3762caa843235757e5d724f69978b005b070a1

    • SSDEEP

      24576:AjULrWjEXNmzNqyRYpU/sdMgQf/HhmYs4ykvWiH:AqrFXNmz8yKpUCRmBs4y8Z

    • 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