Categories: Malware

How to remove “Win32/Kryptik.FOSU”?

The Win32/Kryptik.FOSU is considered dangerous by lots of security experts. When this infection is active, you may notice unwanted processes in Task Manager list. In this case, it is adviced to scan your computer with GridinSoft Anti-Malware.

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What Win32/Kryptik.FOSU virus can do?

  • Executable code extraction
  • Creates RWX memory
  • At least one IP Address, Domain, or File Name was found in a crypto call
  • A process created a hidden window
  • The binary likely contains encrypted or compressed data.
  • Uses Windows utilities for basic functionality
  • Attempts to delete volume shadow copies
  • Attempts to remove evidence of file being downloaded from the Internet
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config
  • Steals private information from local Internet browsers
  • Installs itself for autorun at Windows startup
  • Exhibits possible ransomware file modification behavior
  • Creates a hidden or system file
  • Attempts to modify proxy settings
  • Creates a copy of itself
  • Anomalous binary characteristics
  • Uses suspicious command line tools or Windows utilities

How to determine Win32/Kryptik.FOSU?


File Info:

crc32: 4F7571ACmd5: 4428735baf5dbfedfdbebce900fb353aname: 4428735BAF5DBFEDFDBEBCE900FB353A.mlwsha1: 7a27ead01145d878225f52db6507b91ce9c835b1sha256: b5c82043ab6d722434f635f85ebec9faa058622c86cc2731b0d4936a1e6227ebsha512: c2e43fbbd92550741d483d6569e74548e76508a335a688c98c40ea72913d1a79938e2271a361cbdff4554d58a78da5625c643a4689f2b191ed1626823fccc3a8ssdeep: 768:plwLveNbKzidlVY59kbKzidlVY59kbKzidlAmVLybKzidlVY59+lSd05hLYVPIq:plwLv6Kr5UKr5UKu6Kr5U4dpDGV48Etype: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Win32/Kryptik.FOSU also known as:

Bkav W32.AIDetect.malware1
K7AntiVirus Trojan ( 00515aa21 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.10103
Cynet Malicious (score: 100)
CAT-QuickHeal Ransom.Exxroute.A3
ALYac Trojan.Dalexis.Gen.1
Cylance Unsafe
Zillya Trojan.Kryptik.Win32.1436407
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Spora.5fe6224b
K7GW Trojan ( 00515aa21 )
Cybereason malicious.baf5db
Cyren W32/Ransom.CW.gen!Eldorado
Symantec Packed.Generic.493
ESET-NOD32 a variant of Win32/Kryptik.FOSU
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Ransomware.Razy-9808404-0
Kaspersky HEUR:Trojan.Win32.Generic
BitDefender Trojan.Dalexis.Gen.1
NANO-Antivirus Trojan.Win32.Yakes.elwdgv
MicroWorld-eScan Trojan.Dalexis.Gen.1
Tencent Malware.Win32.Gencirc.10b5879e
Ad-Aware Trojan.Dalexis.Gen.1
Sophos ML/PE-A + Mal/Elenoocka-E
Comodo TrojWare.Win32.Crypt.CA@6ykcle
F-Secure Heuristic.HEUR/AGEN.1105007
BitDefenderTheta Gen:NN.ZexaF.34628.fqW@a8cr8ko
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_HPCERBER.SMONT4
McAfee-GW-Edition BehavesLike.Win32.Generic.mh
FireEye Generic.mg.4428735baf5dbfed
Emsisoft Trojan.Dalexis.Gen.1 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Generic.atfsq
Webroot Trojan.Dropper.Gen
Avira HEUR/AGEN.1105007
eGambit Unsafe.AI_Score_83%
Antiy-AVL Trojan[Ransom]/Win32.Spora
Kingsoft Win32.Heur.KVMH017.a.(kcloud)
Microsoft Ransom:Win32/Spora.A
Arcabit Trojan.Dalexis.Gen.1
AegisLab Trojan.Win32.Spora.4!c
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.Dalexis.Gen.1
AhnLab-V3 Trojan/Win32.Cerber.R198878
Acronis suspicious
McAfee Ransomware-FMJ!4428735BAF5D
MAX malware (ai score=80)
VBA32 BScope.Trojan.Zbot.2312
Malwarebytes Ransom.Cerber
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_HPCERBER.SMONT4
Rising Ransom.Cerber!8.3058 (CLOUD)
Yandex Trojan.GenAsa!g4m8kxlnc38
Ikarus Trojan.Ransom.Spora
Fortinet W32/Kryptik.FONH!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Trojan.917

How to remove Win32/Kryptik.FOSU?

  • Download and install GridinSoft Anti-Malware.
  • Open GridinSoft Anti-Malware and perform a “Standard scan“.
  • Move to quarantine” all items.
  • Open “Tools” tab – Press “Reset Browser Settings“.
  • Select proper browser and options – Click “Reset”.
  • Restart your computer.
Paul Valéry

I'm a cyber security analyst and data science expert with 5+ years of experience with security software contractors.

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