Overview

overview

10

Static

static

1

gunzipped.exe

windows7_x64

10

gunzipped.exe

windows10_x64

10

Sharing

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General

  • Target

    gunzipped.exe

  • Size

    411KB

  • Sample

    220106-hqya2sbdck

  • MD5

    c2301b62539adcba29dcf6a3200bd017

  • SHA1

    fd80f7e8e32661d5ec12e7a901f22a9ed82e17a7

  • SHA256

    c30ce79d7b5b0708dc03f1532fa89afd4efd732531cb557dc31fe63acd5bc1ce

  • SHA512

    80fef672e7f48640c585f12408025ea06c67344551bb4638e10120ceb30da7e888b18a52aabd209186315c1476da905afe15d5cb68a7d7e266954de16e813037

Score
10/10
oskidiscoveryinfostealerspywarestealersuricata

Malware Config

Extracted

Family

oski

C2

http://2.56.57.108/osk/

Targets

    • Target

      gunzipped.exe

    • Size

      411KB

    • MD5

      c2301b62539adcba29dcf6a3200bd017

    • SHA1

      fd80f7e8e32661d5ec12e7a901f22a9ed82e17a7

    • SHA256

      c30ce79d7b5b0708dc03f1532fa89afd4efd732531cb557dc31fe63acd5bc1ce

    • SHA512

      80fef672e7f48640c585f12408025ea06c67344551bb4638e10120ceb30da7e888b18a52aabd209186315c1476da905afe15d5cb68a7d7e266954de16e813037

    Score
    10/10
    oskiinfostealerdiscoveryspywarestealersuricata

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

      infostealeroski

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

      suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

      suricata

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

      suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

      suricata

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

      suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

      suricata

    • Downloads MZ/PE file

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Accesses cryptocurrency files/wallets, possible credential harvesting

      spyware

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Data from Local System

2
T1005

Exfiltration

Command and Control

Impact

Tasks