TrojanDownloader:Win32/Kuluoz

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Spectating the TrojanDownloader:Win32/Kuluoz malware detection means that your PC is in big danger. This malware can correctly be named as ransomware – type of malware which ciphers your files and forces you to pay for their decryption. Deleteing it requires some peculiar steps that must be done as soon as possible.
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TrojanDownloader:Win32/Kuluoz detection is a virus detection you can spectate in your system. It often appears after the preliminary procedures on your PC – opening the suspicious e-mail, clicking the advertisement in the Web or mounting the program from dubious sources. From the instance it shows up, you have a short time to take action until it begins its harmful activity. And be sure – it is much better not to wait for these malicious things.

What is TrojanDownloader:Win32/Kuluoz virus?

TrojanDownloader:Win32/Kuluoz is ransomware-type malware. It searches for the files on your disk drives, encrypts it, and after that asks you to pay the ransom for getting the decryption key. Besides making your files locked, this virus additionally does a lot of harm to your system. It changes the networking setups in order to prevent you from checking out the elimination guides or downloading the antivirus. In some cases, TrojanDownloader:Win32/Kuluoz can also block the setup of anti-malware programs.

TrojanDownloader:Win32/Kuluoz Summary

In summary, TrojanDownloader:Win32/Kuluoz malware activities in the infected computer are next:

  • Behavioural detection: Executable code extraction – unpacking;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Creates RWX memory;
  • Possible date expiration check, exits too soon after checking local time;
  • A process attempted to delay the analysis task.;
  • Dynamic (imported) function loading detected;
  • Performs HTTP requests potentially not found in PCAP.;
  • CAPE extracted potentially suspicious content;
  • The binary contains an unknown PE section name indicative of packing;
  • Authenticode signature is invalid;
  • Behavioural detection: Injection (Process Hollowing);
  • Executed a process and injected code into it, probably while unpacking;
  • Behavioural detection: Injection (inter-process);
  • Behavior consistent with a dropper attempting to download the next stage.;
  • Attempts to modify proxy settings;
  • Creates a copy of itself;
  • Ciphering the files located on the victim’s disk drive — so the victim cannot check these files;
  • Blocking the launching of .exe files of anti-malware apps
  • Blocking the launching of installation files of anti-malware apps

Ransomware has actually been a major problem for the last 4 years. It is hard to imagine a more hazardous virus for both individuals and corporations. The algorithms used in TrojanDownloader:Win32/Kuluoz (typically, 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 actually exists, and possibly will exist. However, that malware does not do all these terrible things immediately – it may require up to a few hours to cipher all of your documents. Therefore, seeing the TrojanDownloader:Win32/Kuluoz detection is a clear signal that you have to begin the clearing process.

Where did I get the TrojanDownloader:Win32/Kuluoz?

General ways of TrojanDownloader:Win32/Kuluoz spreading are standard for all other ransomware examples. Those are one-day landing websites where victims are offered to download the free program, so-called bait emails and hacktools. Bait emails are a pretty modern method in malware spreading – you receive the e-mail that simulates some normal notifications about deliveries or bank service conditions modifications. Within the e-mail, 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 fairly simple, however, still needs a lot of focus. Malware can hide in different places, and it is much better to stop it even before it gets into your PC than to rely on an anti-malware program. Simple cybersecurity awareness is just an important item in the modern world, even if your interaction with a computer stays on YouTube videos. That may keep you a great deal of time and money which you would certainly spend while looking for a fix guide.

TrojanDownloader:Win32/Kuluoz malware technical details

File Info:

name: 5331AB5B5E4A0523E3F2.mlw
path: /opt/CAPEv2/storage/binaries/eaaab343c432583804e28af3ef2d885e0373f6f2570a6ba6945196e6526a8f23
crc32: A83576FA
md5: 5331ab5b5e4a0523e3f2463275fcb300
sha1: 5cd8682fe1440334f41e2dbe5a363bf401dbaf2a
sha256: eaaab343c432583804e28af3ef2d885e0373f6f2570a6ba6945196e6526a8f23
sha512: d36d9eccc16f373f6e46f27557bd1c5f0023e64521ac8c76b2b52eedf7667e06c98bc37f06d7add324d5819bcbc99feddb593b900597c04a602073e711c255c8
ssdeep: 3072:/Cof7o21xmpS1G8/ntPicu5nEuT3uT3uTKx:/Uaxmpd8BiZdT+T+T
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T1BFE3AE95F383A7A5F86606FA64352B0B996EFF7E9D5B120F5470B4180FB31938923207
sha3_384: 0f0fe2fc7ebeaa177879c9716e45da386aa5cc3bb548d7e70aaaeced10eb82b1a04378ae615cd0433ff0644157a002f4
ep_bytes: 558bec83ec7856c745f8000000008d45
timestamp: 2014-03-13 16:49:31

Version Info:

Comments: This installation was built with.
Translation: 0x0000 0x04b0

TrojanDownloader:Win32/Kuluoz also known as:

Bkav W32.AIDetect.malware1
Lionic Trojan.Win32.Generic.lw2L
tehtris Generic.Malware
MicroWorld-eScan Gen:Variant.Dox.2
FireEye Generic.mg.5331ab5b5e4a0523
CAT-QuickHeal TrojanPWS.Zbot.Gen
ALYac Gen:Variant.Dox.2
Cylance Unsafe
Sangfor Suspicious.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
BitDefender Gen:Variant.Dox.2
K7GW Backdoor ( 0040f8401 )
K7AntiVirus Backdoor ( 0040f8401 )
VirIT Trojan.Win32.Generic.AFRB
Cyren W32/Trojan.GJYC-8873
Symantec Packed.Generic.459
Elastic malicious (high confidence)
ESET-NOD32 a variant of Win32/Kryptik.BXDA
APEX Malicious
ClamAV Win.Trojan.Zbot-6830587-0
Kaspersky HEUR:Trojan.Win32.Generic
Alibaba TrojanDropper:Win32/dropper.ali1003001
NANO-Antivirus Trojan.Win32.Androm.cuplzg
Rising Trojan.Win32.Generic.16925236 (C64:YzY0Ok81xcmJgRkiWMUarh+VHEY)
Ad-Aware Gen:Variant.Dox.2
TACHYON Backdoor/W32.Androm.146432.C
Emsisoft Gen:Variant.Dox.2 (B)
Comodo Backdoor.Win32.Androm.DPEI@58bzy6
DrWeb BackDoor.Kuluoz.4
Zillya Backdoor.Androm.Win32.6790
TrendMicro BKDR_KULUOZ.SMJ1
McAfee-GW-Edition Packed-AM!5331AB5B5E4A
Sophos Mal/Generic-S + Troj/Ransom-SY
SentinelOne Static AI – Malicious PE
Jiangmin Backdoor/Androm.cjc
Avira BDS/Androm.bxiw
Microsoft TrojanDownloader:Win32/Kuluoz
SUPERAntiSpyware Trojan.Agent/Gen-Kryptik
GData Gen:Variant.Dox.2
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Zeroaccess.R101392
McAfee Packed-AM!5331AB5B5E4A
MAX malware (ai score=100)
VBA32 Backdoor.Androm
Malwarebytes Trojan.Caphaw
Panda Trj/Genetic.gen
TrendMicro-HouseCall BKDR_KULUOZ.SMJ1
Tencent Malware.Win32.Gencirc.114c3da2
Yandex Backdoor.Androm!3H2th6UqrNc
Ikarus Trojan-Spy.Agent
MaxSecure Trojan.Malware.300983.susgen
Fortinet W32/Lockscreen.LOA!tr
BitDefenderTheta Gen:NN.ZexaF.34638.iq0@aG!Rmcii
AVG Win32:Agent-AZTR [Trj]
Cybereason malicious.b5e4a0
Avast Win32:Agent-AZTR [Trj]

How to remove TrojanDownloader:Win32/Kuluoz?

TrojanDownloader:Win32/Kuluoz malware is extremely difficult to eliminate manually. It stores its files in a variety of places throughout the disk, and can restore itself from one of the elements. Additionally, countless alterations in the registry, networking settings and also Group Policies are fairly hard to find and return to the original. It is far better to use a specific app – exactly, an anti-malware tool. GridinSoft Anti-Malware will definitely fit the best for malware elimination objectives.

Why GridinSoft Anti-Malware? It is pretty light-weight and has its detection databases updated almost every hour. In addition, it does not have such bugs and vulnerabilities as Microsoft Defender does. The combination of these facts makes GridinSoft Anti-Malware suitable for getting rid of malware of any kind.

Remove the viruses with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of [SHORT_NAME] the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
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About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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