NSIS/TrojanDownloader.Agent.OBN Virus Removal

Seeing the NSIS/TrojanDownloader.Agent.OBN detection name means that your system is in big danger. This malware can correctly be identified as ransomware – virus which ciphers your files and forces you to pay for their decryption. Removing it requires some specific steps that must be taken as soon as possible.

NSIS/TrojanDownloader.Agent.OBN detection is a virus detection you can spectate in your system. It usually appears after the provoking activities on your PC – opening the dubious email, clicking the banner in the Web or installing the program from suspicious resources. From the instance it shows up, you have a short time to do something about it before it starts its harmful activity. And be sure – it is better not to await these harmful things.

What is NSIS/TrojanDownloader.Agent.OBN virus?

NSIS/TrojanDownloader.Agent.OBN Summary

Summarizingly, NSIS/TrojanDownloader.Agent.OBN ransomware activities in the infected PC are next:

  • Sample contains Overlay data;
  • Performs HTTP requests potentially not found in PCAP.;
  • Reads data out of its own binary image;
  • Authenticode signature is invalid;
  • Attempts to modify proxy settings;
  • Deletes executed files from disk;
  • Encrypting the files kept on the target’s disks — so the victim cannot use these files;
  • Blocking the launching of .exe files of security tools
  • Blocking the launching of installation files of anti-malware apps

Ransomware has been a horror story for the last 4 years. It is hard to picture a more damaging malware for both individuals and businesses. The algorithms utilized in NSIS/TrojanDownloader.Agent.OBN (usually, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need more time than our galaxy currently exists, and possibly will exist. However, that virus does not do all these bad things without delay – it can take up to several hours to cipher all of your files. Thus, seeing the NSIS/TrojanDownloader.Agent.OBN detection is a clear signal that you must start the clearing procedure.

Where did I get the NSIS/TrojanDownloader.Agent.OBN?

Typical tactics of NSIS/TrojanDownloader.Agent.OBN injection are typical for all other ransomware variants. Those are one-day landing websites where users are offered to download and install the free app, so-called bait emails and hacktools. Bait e-mails are a pretty modern method in malware distribution – you get the e-mail that imitates some regular notifications about shippings or bank service conditions changes. Within the email, there is a malicious MS Office file, or a web link which opens the exploit landing site.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Preventing it looks quite uncomplicated, but still requires a lot of focus. Malware can hide in various places, and it is better to stop it even before it goes into your computer than to trust in an anti-malware program. Standard cybersecurity knowledge is just an essential item in the modern-day world, even if your interaction with a PC stays on YouTube videos. That may save you a lot of time and money which you would certainly spend while searching for a solution.

NSIS/TrojanDownloader.Agent.OBN malware technical details

File Info:

name: D8C01F57D0CADAC3AE91.mlwpath: /opt/CAPEv2/storage/binaries/09e677fa0ac11d79e5acf4613d6deb767b04e40e94c6eba152602e63a29a8112crc32: 9833C8B1md5: d8c01f57d0cadac3ae9105299063a5b7sha1: 69bebb4a2725a6c6065ee024959e18f1172b102fsha256: 09e677fa0ac11d79e5acf4613d6deb767b04e40e94c6eba152602e63a29a8112sha512: ced779d7504283a99fe32d278e87a02cb9e41898c77c03ed5886006c4e3f2e201f27255f7b85123a14fb5c6c3be15dc76415ad2ba149f1c13f2da64aa5dfdb1fssdeep: 6144:bfL+oqaAAaB+OLFGCZssey0BQdf5+Ew2OtuXHH:bfLZA8MGCZsKsQxw2OtuXHtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T18B541221E750C03ADBB21732953B77EB4BFB98251690674303607E3EBDB2909821FE59sha3_384: 4cbf6a4a63dc983276bd594771fa611c4c45dc8d99f4be6bc9b2f8f7bc42e1734698bd5b36fb13f92d512226831c2be0ep_bytes: 81ecf80300005556576a205f33ed6801timestamp: 2023-07-02 02:09:48

Version Info:

0: [No Data]

NSIS/TrojanDownloader.Agent.OBN also known as:

Bkav W32.AIDetectMalware
Elastic malicious (high confidence)
MicroWorld-eScan Gen:Variant.Ransom.Loki.1155
FireEye Generic.mg.d8c01f57d0cadac3
VIPRE Gen:Variant.Ransom.Loki.1155
CrowdStrike win/malicious_confidence_60% (D)
VirIT Trojan.Win32.NSISDrp.CHQB
ESET-NOD32 NSIS/TrojanDownloader.Agent.OBN
APEX Malicious
Avast NSIS:DropperX-gen [Drp]
Kaspersky HEUR:Trojan-Downloader.Win32.OffLoader.gen
BitDefender Gen:Variant.Ransom.Loki.1155
Emsisoft Gen:Variant.Ransom.Loki.1155 (B)
Google Detected
F-Secure Trojan.TR/Dropper.Gen
DrWeb Trojan.DownLoad4.16275
Trapmine malicious.moderate.ml.score
Sophos Generic ML PUA (PUA)
Varist W32/Trojan.WMIT-7221
Avira TR/Dropper.Gen
MAX malware (ai score=81)
Antiy-AVL Trojan[Downloader]/Win32.OffLoader.gen
Kingsoft malware.kb.a.909
Arcabit Trojan.Ransom.Loki.D483
ZoneAlarm HEUR:Trojan-Downloader.Win32.OffLoader.gen
GData Gen:Variant.Ransom.Loki.1155
Cynet Malicious (score: 99)
VBA32 suspected of Trojan.Downloader.gen
Cylance unsafe
Fortinet NSIS/Agent.OBN!tr.dldr
AVG NSIS:DropperX-gen [Drp]
Cybereason malicious.7d0cad
DeepInstinct MALICIOUS

How to remove NSIS/TrojanDownloader.Agent.OBN?

About the author

Robert Bailey

Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

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