General

  • Target

    90cfb42d8415b2804d7335d4e9ddda33264906b0169dd121ccc80bd50643d0e2.exe

  • Size

    432KB

  • Sample

    230405-m6gqfsfh7v

  • MD5

    566e00ed92162e1941567623e9938067

  • SHA1

    3e285319ece4b35b877dd60a920d8970d87ed3fd

  • SHA256

    90cfb42d8415b2804d7335d4e9ddda33264906b0169dd121ccc80bd50643d0e2

  • SHA512

    7d96e0aea8302506713613ed68a55cea2ec0f1e4cd64ba6ff424bd772c621a6ad9136da2ec9c1f80b41c4267f7bd2ace82923f2ae2221010568f1e5de63fceaa

  • SSDEEP

    6144:K2nLfyfKQu8zZ0zQ7Cn7ggrw5vK/cKomvWzMlTRay9VAHPpczK3qKTmZrqBMdGGF:K2nLYpzZUMKNHompdBwcKJurqBpJXAAu

Malware Config

Extracted

Family

oski

C2

Fragly.top

Targets

    • Target

      90cfb42d8415b2804d7335d4e9ddda33264906b0169dd121ccc80bd50643d0e2.exe

    • Size

      432KB

    • MD5

      566e00ed92162e1941567623e9938067

    • SHA1

      3e285319ece4b35b877dd60a920d8970d87ed3fd

    • SHA256

      90cfb42d8415b2804d7335d4e9ddda33264906b0169dd121ccc80bd50643d0e2

    • SHA512

      7d96e0aea8302506713613ed68a55cea2ec0f1e4cd64ba6ff424bd772c621a6ad9136da2ec9c1f80b41c4267f7bd2ace82923f2ae2221010568f1e5de63fceaa

    • SSDEEP

      6144:K2nLfyfKQu8zZ0zQ7Cn7ggrw5vK/cKomvWzMlTRay9VAHPpczK3qKTmZrqBMdGGF:K2nLYpzZUMKNHompdBwcKJurqBpJXAAu

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

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

    • Downloads MZ/PE file

    • Checks BIOS information in registry

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

    • 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.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Checks whether UAC is enabled

    • Legitimate hosting services abused for malware hosting/C2

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

2
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Tasks