Overview

overview

10

Static

static

3

JaffaCakes...2a.exe

windows10-ltsc_2021-x64

JaffaCakes...2a.exe

windows11-21h2-x64

10

Resubmissions

29/03/2025, 10:36 UTC

250329-mnfqfasr12 10

29/03/2025, 06:46 UTC

250329-hjwtmsyxfz 10

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General

  • Target

    JaffaCakes118_8b1e36f6581f2277b0f8af5c27afea2a

  • Size

    500KB

  • Sample

    250329-mnfqfasr12

  • MD5

    8b1e36f6581f2277b0f8af5c27afea2a

  • SHA1

    e63bbfb02b21834db1890dec85669cdc93cc3978

  • SHA256

    9f1ca7fd043142e1a40113229b8764d993123647a3ea9ada7ca338f67325020e

  • SHA512

    919d39e4d25266a674c0f47de00af65a07159fe082f0d9bd9976f7b2f6f49a6a6603c47dd0a6ac89512b19a73cb579cc5b593272dd219607834b5df4fd5db2e4

  • SSDEEP

    12288:L1Tg5pBHxXptbN5ZRgOiBjw/C0AWzFjQ7H:LcH7tbrbIBjwuWR4H

Score
10/10
pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

Malware Config

Targets

    • Target

      JaffaCakes118_8b1e36f6581f2277b0f8af5c27afea2a

    • Size

      500KB

    • MD5

      8b1e36f6581f2277b0f8af5c27afea2a

    • SHA1

      e63bbfb02b21834db1890dec85669cdc93cc3978

    • SHA256

      9f1ca7fd043142e1a40113229b8764d993123647a3ea9ada7ca338f67325020e

    • SHA512

      919d39e4d25266a674c0f47de00af65a07159fe082f0d9bd9976f7b2f6f49a6a6603c47dd0a6ac89512b19a73cb579cc5b593272dd219607834b5df4fd5db2e4

    • SSDEEP

      12288:L1Tg5pBHxXptbN5ZRgOiBjw/C0AWzFjQ7H:LcH7tbrbIBjwuWR4H

    Score
    10/10
    pykspadefense_evasiondiscoverypersistenceprivilege_escalationtrojanworm

    • Modifies WinLogon for persistence

      persistence

    • Pykspa

      Pykspa is a worm spreads via Skype uses DGA and it's written in C++.

      wormpykspa

    • Pykspa family

      pykspa

    • UAC bypass

      defense_evasiontrojan

    • Detect Pykspa worm

      worm

    • Adds policy Run key to start application

      persistence

    • Disables RegEdit via registry modification

      defense_evasion

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Impair Defenses: Safe Mode Boot

      defense_evasion

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      defense_evasiontrojan

    • Hijack Execution Flow: Executable Installer File Permissions Weakness

      Possible Turn off User Account Control's privilege elevation for standard users.

      defense_evasionpersistenceprivilege_escalation

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops autorun.inf file

      Malware can abuse Windows Autorun to spread further via attached volumes.

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Replication Through Removable Media

1
T1091

Execution

Persistence

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Winlogon Helper DLL

1
T1547.004

Hijack Execution Flow

1
T1574

Executable Installer File Permissions Weakness

1
T1574.005

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Winlogon Helper DLL

1
T1547.004

Hijack Execution Flow

1
T1574

Executable Installer File Permissions Weakness

1
T1574.005

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Hijack Execution Flow

1
T1574

Executable Installer File Permissions Weakness

1
T1574.005

Impair Defenses

2
T1562

Disable or Modify Tools

1
T1562.001

Safe Mode Boot

1
T1562.009

Modify Registry

5
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Replication Through Removable Media

1
T1091

Collection

Command and Control

Exfiltration

Impact

Tasks

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