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

    248KB

  • Sample

    210430-1r8mzg3lra

  • MD5

    470dac4893d3f15bce96543d2e023658

  • SHA1

    0c15f00e4afd24e1e09e43b3c2c6d711a60b2806

  • SHA256

    cc4c6be7a609aaaabf82ae1cd164c567ff7f7cc1ebdb59175d0ae1ecbac74b5c

  • SHA512

    62ce55e126d8ca4e816ee2fed31349260e23605684829965a392db0667049ba58a7e32d7d27a40acf4ca5d9fa1085476b90d58c4e88c3e77c100e9d035e335ea

Score
10/10
oskidiscoveryinfostealerpersistencespywarestealer

Malware Config

Extracted

Family

oski

C2

bestbundledealer.com

Targets

    • Target

      gunzipped.exe

    • Size

      248KB

    • MD5

      470dac4893d3f15bce96543d2e023658

    • SHA1

      0c15f00e4afd24e1e09e43b3c2c6d711a60b2806

    • SHA256

      cc4c6be7a609aaaabf82ae1cd164c567ff7f7cc1ebdb59175d0ae1ecbac74b5c

    • SHA512

      62ce55e126d8ca4e816ee2fed31349260e23605684829965a392db0667049ba58a7e32d7d27a40acf4ca5d9fa1085476b90d58c4e88c3e77c100e9d035e335ea

    Score
    10/10
    oskidiscoveryinfostealerpersistencespywarestealer

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

      infostealeroski

    • Downloads MZ/PE file

    • Deletes itself

    • 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

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

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

      discovery

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

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