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MB-a8e9a8bebaf10e8238a75c1a2958a22b8fadc160de44857abe05def398fdd5e2 high

📛 Threat Title

QuasarRAT: OperaUpdate.exe

Category: QuasarRAT Published: Source updated: First seen: Last updated: Source: Abuse.ch

Description

File type: exe. Size: 3385856 bytes. Tags: auto-reg, exe, quasarrat, rat. Reporter: anonymous. First seen: 2026-05-14 07:42:15.

Indicators of Compromise (5)

Each indicator is enriched from the IOC database, threat-intel feed corroboration (Threat Hunt) and VirusTotal. Click one to expand.

domain operaupdate.exe VT: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/domains/operaupdate.exe

IOC database

Type
domain
Value
operaupdate.exe
First seen
Last seen
Attached to this threat
Appears in
1 threat
Description
Extracted from Threat MB-a8e9a8bebaf10e8238a75c1a2958a22b8fadc160de44857abe05def398fdd5e2

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Threat Hunt — feed corroboration

Not present in any configured threat-intel feed.

Details From VirusTotal

VirusTotal: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/domains/operaupdate.exe

hash_imphash f34d5f2d4577ed6d9ceec516c1f5a744

IOC database

Type
hash_imphash
Value
f34d5f2d4577ed6d9ceec516c1f5a744
First seen
Last seen
Attached to this threat
Appears in
656 threats
Description
imphash of URLhaus payload 61d424c2e3c5d8db…

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Threat Hunt — feed corroboration

Not present in any configured threat-intel feed.

Details From VirusTotal

No VirusTotal details cached for this IOC. Open the IOC page to query VirusTotal.

hash_sha256 a8e9a8bebaf10e8238a75c1a2958a22b8fadc160de44857abe05def398fdd5e2 VT: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/files/a8e9a8bebaf10e8238a75c1a2958a22b8fadc160de44857abe05def398fdd5e2
1 feed

IOC database

Type
hash_sha256
Value
a8e9a8bebaf10e8238a75c1a2958a22b8fadc160de44857abe05def398fdd5e2
First seen
Last seen
Attached to this threat
Appears in
2 threats
Description
QuasarRAT

Open the full IOC page →

Threat Hunt — feed corroboration

Listed by 1 threat-intel feed vendor: Abuse.ch. Open in Threat Hunt →

Details From VirusTotal

VirusTotal: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/files/a8e9a8bebaf10e8238a75c1a2958a22b8fadc160de44857abe05def398fdd5e2

hash_sha1 ad7c1955c5fbe05d4dd6275a37448e96e442073a VT: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/files/ad7c1955c5fbe05d4dd6275a37448e96e442073a
2 feeds

IOC database

Type
hash_sha1
Value
ad7c1955c5fbe05d4dd6275a37448e96e442073a
First seen
Last seen
Attached to this threat
Appears in
2 threats

Open the full IOC page →

Threat Hunt — feed corroboration

Listed by 2 threat-intel feed vendors: Abuse.ch, threatview.io. Open in Threat Hunt →

Details From VirusTotal

VirusTotal: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/files/ad7c1955c5fbe05d4dd6275a37448e96e442073a

hash_md5 d9a75503bb0fc64c6c706da9551708a5 VT: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/files/d9a75503bb0fc64c6c706da9551708a5
2 feeds

IOC database

Type
hash_md5
Value
d9a75503bb0fc64c6c706da9551708a5
First seen
Last seen
Attached to this threat
Appears in
2 threats

Open the full IOC page →

Threat Hunt — feed corroboration

Listed by 2 threat-intel feed vendors: Abuse.ch, threatview.io. Open in Threat Hunt →

Details From VirusTotal

VirusTotal: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/files/d9a75503bb0fc64c6c706da9551708a5

References (1)

  • MalwareBazaar sample page Abuse.ch

    File type: exe. Size: 3385856 bytes. Tags: auto-reg, exe, quasarrat, rat. Reporter: anonymous. First seen: 2026-05-14 07:42:15.

Remediations (10)

  • QuasarRAT Analysis pt1 - 0x70RVS
    web:7orvs.github.io

    QuasarRAT Analysis pt1 4 minute read On this page QuasarRAT Analysis General Inoformation: Basic Static Analysis Basic Dynamic Analysis Advanced analysis QuasarRAT Analysis General Inoformation: ... Basic Static Analysis The output from DIE told us that this sample is written in .NET with high entropy and packing indication:

  • Quasar RAT Malware Analysis, Overview by ANY.RUN
    web:any.run

    Quasar is a remote access trojan is used by attackers to take remote control of infected machines. Follow live malware statistics of this trojan and get new reports, samples, IOCs, etc.

  • Hunting AsyncRAT & QuasarRAT - dfir.ch
    web:dfir.ch

    This post combines and extends two longer threads previously shared on X (formerly Twitter) by me, discussing AsyncRAT and QuasarRAT . It highlights techniques and indicators of compromise (IOCs) that we, as defenders, can leverage to identify and hunt infections in our environment caused by these two types of remote access trojans.

  • GitHub - quasar/Quasar: Remote Administration Tool for Windows
    web:github.com

    Free, Open-Source Remote Administration Tool for Windows Quasar is a fast and light-weight remote administration tool coded in C#. The usage ranges from user support through day-to-day administrative work to employee monitoring. Providing high stability and an easy-to-use user interface, Quasar is the perfect remote administration solution for you. Please check out the Getting Started guide.

  • cyber-pal-security/SecKnowledge-Eval · Datasets at Hugging Face
    web:huggingface.co

    We're on a journey to advance and democratize artificial intelligence through open source and open science.

  • QuasarRAT Malware Analysis Report | by psy_maestro | Medium
    web:medium.com

    QuasarRAT Malware Analysis Report Introduction QuasarRAT is an open-source RAT (Remote Access Tool/Trojan). These tools are built for legitimate purposes like accessing remote computers, e.g ...

  • Remediation vs. Mitigation: What's the Difference? | Panorays
    web:panorays.com

    Discover the difference between remediation and mitigation in risk management and how each strategy impacts security and resilience.

  • QuasarRAT - Remote Administration Tool for Windows - PentestTools
    web:pentesttools.net

    Quasar is a fast and light-weight remote administration tool coded in C#. Providing high stability and an easy-to-use user interface, Quasar is the perfect remote administration solution for you.

  • Quasar RAT - Malware removal instructions (updated) - PCrisk
    web:www.pcrisk.com

    What is Quasar? The Quasar tool allows users to remotely control other computers over a network. Software programs of this type are known as remote access tools (RATs). There both are legitimate and illegal RATs. Quasar is a legitimate tool, however, cyber criminals often use these tools for malicious purposes. I.e., to steal personal information that could be used to generate revenue. If you ...

  • Windows Update remediation : r/Intune - Reddit
    web:www.reddit.com

    The remediation script below runs DISM, checks/corrects various registry values, checks for update blocks, and finally checks for Windows Updates. I mostly put together different pieces that I've found online, wrote of my own and definitely did not write any of the modules in here.

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