Categories: Backdoor

UDS:Backdoor.Win32.Manuscrypt removal tips

The UDS:Backdoor.Win32.Manuscrypt 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 UDS:Backdoor.Win32.Manuscrypt virus can do?

  • Behavioural detection: Executable code extraction – unpacking
  • SetUnhandledExceptionFilter detected (possible anti-debug)
  • Yara rule detections observed from a process memory dump/dropped files/CAPE
  • Creates RWX memory
  • Guard pages use detected – possible anti-debugging.
  • Dynamic (imported) function loading detected
  • Performs HTTP requests potentially not found in PCAP.
  • Reads data out of its own binary image
  • CAPE extracted potentially suspicious content
  • Drops a binary and executes it
  • The binary contains an unknown PE section name indicative of packing
  • Authenticode signature is invalid
  • A scripting utility was executed
  • Uses Windows utilities for basic functionality
  • Uses Windows utilities for basic functionality
  • Detects Sandboxie through the presence of a library
  • Detects Avast Antivirus through the presence of a library
  • Checks for the presence of known windows from debuggers and forensic tools
  • Created a process from a suspicious location
  • Collects and encrypts information about the computer likely to send to C2 server
  • Checks the presence of disk drives in the registry, possibly for anti-virtualization
  • Attempts to modify proxy settings
  • Attempts to modify Windows Defender using PowerShell
  • Attempts to execute suspicious powershell command arguments

How to determine UDS:Backdoor.Win32.Manuscrypt?


File Info:

name: 54873A717A6A1830A379.mlwpath: /opt/CAPEv2/storage/binaries/632f41e443088fe065f873d8befec67aa9a938baf7e4d6aa22372ea939d36225crc32: B0AA8616md5: 54873a717a6a1830a3798d48322863fdsha1: ab227b130c74feb6d0ed26911dce1cd6e57525d7sha256: 632f41e443088fe065f873d8befec67aa9a938baf7e4d6aa22372ea939d36225sha512: 193c816efb2eda22580083dc3a5ad917b0ddc312a7bdc475e57e889a9133f58098a7536d5dd11bc5dc5f5e773d65f84596dd569ad5019b1abcd9e4ae7d71f98bssdeep: 196608:xnXR3V8NDIHdQCQWluyAFk06jjiVs8jaRQ+i47Sw/xjnvVOSJ:xnXR3V8NsHdQa0kEz+ZPNNPtype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T16B763311B5F885B7CA16A87378AB9EA120BED7982F5D54F32357C0CC5F482BA6803747sha3_384: 35331375522d941d6c4a1e3c5bb7a0521ae24acc25ba39a87858ced0a94942be94f767d75818d9831ffed517e9bd59bcep_bytes: 558bec6aff6898c24100680691410064timestamp: 2019-02-21 16:00:00

Version Info:

CompanyName: Igor PavlovFileDescription: 7z Setup SFXFileVersion: 19.00InternalName: 7zS.sfxLegalCopyright: Copyright (c) 1999-2018 Igor PavlovOriginalFilename: 7zS.sfx.exeProductName: 7-ZipProductVersion: 19.00Translation: 0x0409 0x04b0

UDS:Backdoor.Win32.Manuscrypt also known as:

Bkav W32.AIDetect.malware2
MicroWorld-eScan Gen:Variant.Jaik.49613
FireEye Gen:Variant.Jaik.49613
CAT-QuickHeal W32.BrowserAssistant.B7
ALYac Gen:Variant.Jaik.49613
Cylance Unsafe
K7AntiVirus Trojan ( 005923e21 )
K7GW Trojan ( 005923e21 )
Cybereason malicious.17a6a1
Cyren W32/MSIL_Troj.BVK.gen!Eldorado
Symantec ML.Attribute.HighConfidence
Elastic malicious (high confidence)
ESET-NOD32 multiple detections
ClamAV Win.Dropper.Pswtool-9857487-0
Kaspersky UDS:Backdoor.Win32.Manuscrypt.gen
BitDefender Gen:Variant.Jaik.49613
Avast Win32:PWSX-gen [Trj]
Ad-Aware Gen:Variant.Jaik.49613
Sophos Mal/Generic-S
F-Secure Heuristic.HEUR/AGEN.1235869
DrWeb Trojan.Siggen17.50069
TrendMicro Trojan.Win32.REDLINESTEALER.U
McAfee-GW-Edition RDN/Generic.hbg
Emsisoft Gen:Variant.Jaik.49613 (B)
GData Gen:Variant.Jaik.49613
Jiangmin Trojan.Agentb.lxw
Avira HEUR/AGEN.1235869
Antiy-AVL Trojan/Win32.Agentb
Kingsoft Win32.Troj.Agentb.kr.(kcloud)
Arcabit Trojan.Jaik.DC1CD
ZoneAlarm HEUR:Trojan-Downloader.MSIL.Voda.gen
Microsoft Trojan:Win32/Sabsik.TE.B!ml
Cynet Malicious (score: 100)
Acronis suspicious
MAX malware (ai score=84)
VBA32 CIL.StupidPInvoker-1.Heur
Malwarebytes Malware.Heuristic.1003
TrendMicro-HouseCall TROJ_GEN.R002H0CE822
Ikarus Trojan-Spy.MSIL.Agent
Fortinet W32/GenKryptik.ERHN!tr
BitDefenderTheta Gen:NN.ZemsilF.34666.wu0@a8zAA1e
AVG Win32:PWSX-gen [Trj]

How to remove UDS:Backdoor.Win32.Manuscrypt?

  • 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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