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Subhajeet Singha

About Subhajeet Singha

Subhajeet is working as a Security Researcher in Security Labs at Quick Heal. His areas of focus are threat intelligence, research along with reverse engineering to improve detection capabilities and to aid in further research.

Operation DupeHike : UNG0902 targets Russian employees with DUPERUNNER and AdaptixC2

Estimated reading time: 11 minutes

Contents Introduction Key Targets. Industries Affected. Geographical Focus. Infection Chain. Initial Findings. Looking into the decoy-document Technical Analysis Stage 1 – Malicious LNK Script Stage 2 – DUPERUNNER Implant Stage 3 – AdaptixC2 Beacon. Infrastructural Artefacts. Conclusion SEQRITE Protection....
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December 3, 2025

Operation Peek-a-Baku: Silent Lynx APT makes sluggish shift to Dushanbe

Operation Peek-a-Baku: Silent Lynx APT makes sluggish shift to Dushanbe

Estimated reading time: 17 minutes

Introduction Timeline Key Targets. Industries Affected. Geographical Focus. Infection Chain. Initial Findings. Technical Analysis. Campaign – I The LNK Way. Malicious SILENT LOADER Malicious LAPLAS Implant – TCP & TLS. Malicious .NET Implant – SilentSweeper Campaign – II Malicious...
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November 3, 2025

Operation BarrelFire: NoisyBear targets entities linked to Kazakhstan’s Oil & Gas Sector.

Operation BarrelFire: NoisyBear targets entities linked to Kazakhstan’s Oil & Gas Sector.

Estimated reading time: 10 minutes

Recent Development: KMG Group of Companies Confirm Simulation, Not a Real Attack Thankfully, as KMG has publicly acknowledged, this was not an actual cyberattack but an internal simulation exercise. Contents Introduction Key Targets Industries Affected. Geographical Focus. Infection Chain....
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September 4, 2025

Operation CargoTalon : UNG0901 Targets Russian Aerospace & Defense Sector using EAGLET implant.

Operation CargoTalon : UNG0901 Targets Russian Aerospace & Defense Sector using EAGLET implant.

Estimated reading time: 11 minutes

Contents Introduction Initial Findings Infection Chain. Technical Analysis Stage 0 – Malicious Email File. Stage 1 – Malicious LNK file. Stage 2 – Looking into the decoy file. Stage 3 – Malicious EAGLET implant. Hunting and Infrastructure. Infrastructural details....
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July 23, 2025

UNG0002: Regional Threat Operations Tracked Across Multiple Asian Jurisdictions

UNG0002: Regional Threat Operations Tracked Across Multiple Asian Jurisdictions

Estimated reading time: 5 minutes

Overview Seqrite Labs APT-Team has identified and tracked UNG0002 also known as Unknown Group 0002, a bunch of espionage-oriented operations which has been grouped under the same cluster conducting campaigns across multiple Asian jurisdictions including China, Hong Kong, and...
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July 16, 2025

Operation DRAGONCLONE: Chinese Telecommunication industry targeted via VELETRIX & VShell malware

Operation DRAGONCLONE: Chinese Telecommunication industry targeted via VELETRIX & VShell malware

Estimated reading time: 10 minutes

Contents Introduction Initial Findings Infection Chain. Technical Analysis Stage 0 – Malicious ZIP File. Stage 1 – Malicious VELETRIX implant. Stage 2 – Malicious V-Shell implant. Hunting and Infrastructure. Attribution Conclusion Seqrite Protection. IOCs MITRE ATT&CK. Authors: Subhajeet Singha...
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June 6, 2025

Unveiling Swan Vector APT Targeting Taiwan and Japan with varied DLL Implants

Unveiling Swan Vector APT Targeting Taiwan and Japan with varied DLL Implants

Estimated reading time: 14 minutes

Content Introduction Initial Findings. Looking into the decoy. Infection Chain. Technical Analysis. Stage 1 – Malicious LNK Script. Stage 2 – Malicious Pterois Implant. Stage 3 – Malicious Isurus Implant. Stage 4 – Malicious Cobalt Strike Shellcode. Infrastructure and...
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May 12, 2025

Operation HollowQuill: Malware delivered into Russian R&D Networks via Research Decoy PDFs

Operation HollowQuill: Malware delivered into Russian R&D Networks via Research Decoy PDFs

Estimated reading time: 10 minutes

Contents Introduction Key Targets Industries Affected Geographical Focus Infection Chain Initial Findings Looking into the decoy-document Technical Analysis Stage 1 – Malicious RAR File Stage 2 – Malicious .NET malware-dropper Stage 3 – Malicious Golang Shellcode loader Stage 4...
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March 31, 2025

Unveiling Silent Lynx APT Targeting Entities Across Kyrgyzstan & Neighbouring Nations

Unveiling Silent Lynx APT Targeting Entities Across Kyrgyzstan & Neighbouring Nations

Estimated reading time: 10 minutes

Silent Lynx APT Targets Various Entities Across Kyrgyzstan & Neighbouring Nations Contents Key Targets Industries Affected Geographical Focus Infection Chain Initial Findings Campaign 1 Looking into the malicious email Looking into decoy document. Campaign 2 Looking into the malicious...
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January 21, 2025

Operation Cobalt Whisper: Threat Actor Targets Multiple Industries Across Hong Kong and Pakistan.

Operation Cobalt Whisper: Threat Actor Targets Multiple Industries Across Hong Kong and Pakistan.

Estimated reading time: 11 minutes

Contents Introduction Key Targets. Industries Affected. Geographical Focus. Initial Findings. Looking into the decoy-document – I Looking into the decoy-document – II Infection Chain. Technical Analysis Stage 1 – Malicious LNK Script & VBScript. Stage 2 – Malicious Cobalt...
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October 24, 2024
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