General

  • Target

    66e4a874645a4e5cffa45813dd5e6bc38dd218247ff784a0618a2d38bdb4a767

  • Size

    2.7MB

  • Sample

    220111-rx5s5sfhh5

  • MD5

    e9efcf9410ee82414468d75b1f54ecb1

  • SHA1

    6b6f63ecdde4deebbf2a56fca633c9f951980038

  • SHA256

    99d52d7c4d445152440004b683d39f2c0d26700fb22b7a94cc4115b32ad0a3b5

  • SHA512

    6e3b902771b39865b1dfcca712145c37e1d1f4d505b06cd114a8a5398462416ec877c36b6d1f80a77f715a58471dfee52b731e8b4582ba8f869c01c36978ed36

Malware Config

Extracted

Family

cryptbot

C2

kotbri22.top

moruzj02.top

Attributes
  • payload_url

    http://okavor03.top/download.php?file=acaboa.exe

Targets

    • Target

      66e4a874645a4e5cffa45813dd5e6bc38dd218247ff784a0618a2d38bdb4a767

    • Size

      2.7MB

    • MD5

      459b0f64c3cb635a03af588adcb98077

    • SHA1

      af3573b5a9ae95d061bb2c0f262a7759b6d8c309

    • SHA256

      66e4a874645a4e5cffa45813dd5e6bc38dd218247ff784a0618a2d38bdb4a767

    • SHA512

      17a53247ea4514c66abb01cecdc44919d768905df56eb6a15361b84c7ea07edc329f48b266406997b40e218cc28ad26b3d295eb55067aa92c3d85e4573b8457a

    • CryptBot

      A C++ stealer distributed widely in bundle with other software.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Deletes itself

    • 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

    • 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

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Collection

Data from Local System

2
T1005

Tasks