General

  • Target

    sample.exe

  • Size

    2.6MB

  • Sample

    230324-y3sjbsbc7z

  • MD5

    35eb63390faa38437c456a1966d2e51a

  • SHA1

    0138a5c885e85ab7960f681f94c552f1cd2b45e9

  • SHA256

    314259cc43c8619b5f8e1ec548b34b64d6b8084342cdd6d8a970718c2d791da8

  • SHA512

    8abef3dde447c025aa69b1524867513a0ecca523583098407bc18f6462acfa38e6e06d621c1943a6c1f6d88030edfdf71c48c2805fa0f5403183bab22c370048

  • SSDEEP

    49152:LxgCKGJaUFxFwTkhnCEtG0vHBsH0PlXSUYo0rI8Jc+UDQ5tBpOTT0cAalxRm:LxLXJtxmTOtNvC/nrhYUrB4TT0chx

Malware Config

Extracted

Family

cryptbot

C2

hevbaw12.top

morgki01.top

Attributes
  • payload_url

    http://kyvihm01.top/download.php?file=brunei.exe

Targets

    • Target

      sample.exe

    • Size

      2.6MB

    • MD5

      35eb63390faa38437c456a1966d2e51a

    • SHA1

      0138a5c885e85ab7960f681f94c552f1cd2b45e9

    • SHA256

      314259cc43c8619b5f8e1ec548b34b64d6b8084342cdd6d8a970718c2d791da8

    • SHA512

      8abef3dde447c025aa69b1524867513a0ecca523583098407bc18f6462acfa38e6e06d621c1943a6c1f6d88030edfdf71c48c2805fa0f5403183bab22c370048

    • SSDEEP

      49152:LxgCKGJaUFxFwTkhnCEtG0vHBsH0PlXSUYo0rI8Jc+UDQ5tBpOTT0cAalxRm:LxLXJtxmTOtNvC/nrhYUrB4TT0chx

    • 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.

    • 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