Backdoor

UDS:Backdoor.Win32.Manuscrypt removal tips

Malware Removal

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.mlw
path: /opt/CAPEv2/storage/binaries/632f41e443088fe065f873d8befec67aa9a938baf7e4d6aa22372ea939d36225
crc32: B0AA8616
md5: 54873a717a6a1830a3798d48322863fd
sha1: ab227b130c74feb6d0ed26911dce1cd6e57525d7
sha256: 632f41e443088fe065f873d8befec67aa9a938baf7e4d6aa22372ea939d36225
sha512: 193c816efb2eda22580083dc3a5ad917b0ddc312a7bdc475e57e889a9133f58098a7536d5dd11bc5dc5f5e773d65f84596dd569ad5019b1abcd9e4ae7d71f98b
ssdeep: 196608:xnXR3V8NDIHdQCQWluyAFk06jjiVs8jaRQ+i47Sw/xjnvVOSJ:xnXR3V8NsHdQa0kEz+ZPNNP
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T16B763311B5F885B7CA16A87378AB9EA120BED7982F5D54F32357C0CC5F482BA6803747
sha3_384: 35331375522d941d6c4a1e3c5bb7a0521ae24acc25ba39a87858ced0a94942be94f767d75818d9831ffed517e9bd59bc
ep_bytes: 558bec6aff6898c24100680691410064
timestamp: 2019-02-21 16:00:00

Version Info:

CompanyName: Igor Pavlov
FileDescription: 7z Setup SFX
FileVersion: 19.00
InternalName: 7zS.sfx
LegalCopyright: Copyright (c) 1999-2018 Igor Pavlov
OriginalFilename: 7zS.sfx.exe
ProductName: 7-Zip
ProductVersion: 19.00
Translation: 0x0409 0x04b0

UDS:Backdoor.Win32.Manuscrypt also known as:

BkavW32.AIDetect.malware2
MicroWorld-eScanGen:Variant.Jaik.49613
FireEyeGen:Variant.Jaik.49613
CAT-QuickHealW32.BrowserAssistant.B7
ALYacGen:Variant.Jaik.49613
CylanceUnsafe
K7AntiVirusTrojan ( 005923e21 )
K7GWTrojan ( 005923e21 )
Cybereasonmalicious.17a6a1
CyrenW32/MSIL_Troj.BVK.gen!Eldorado
SymantecML.Attribute.HighConfidence
Elasticmalicious (high confidence)
ESET-NOD32multiple detections
ClamAVWin.Dropper.Pswtool-9857487-0
KasperskyUDS:Backdoor.Win32.Manuscrypt.gen
BitDefenderGen:Variant.Jaik.49613
AvastWin32:PWSX-gen [Trj]
Ad-AwareGen:Variant.Jaik.49613
SophosMal/Generic-S
F-SecureHeuristic.HEUR/AGEN.1235869
DrWebTrojan.Siggen17.50069
TrendMicroTrojan.Win32.REDLINESTEALER.U
McAfee-GW-EditionRDN/Generic.hbg
EmsisoftGen:Variant.Jaik.49613 (B)
GDataGen:Variant.Jaik.49613
JiangminTrojan.Agentb.lxw
AviraHEUR/AGEN.1235869
Antiy-AVLTrojan/Win32.Agentb
KingsoftWin32.Troj.Agentb.kr.(kcloud)
ArcabitTrojan.Jaik.DC1CD
ZoneAlarmHEUR:Trojan-Downloader.MSIL.Voda.gen
MicrosoftTrojan:Win32/Sabsik.TE.B!ml
CynetMalicious (score: 100)
Acronissuspicious
MAXmalware (ai score=84)
VBA32CIL.StupidPInvoker-1.Heur
MalwarebytesMalware.Heuristic.1003
TrendMicro-HouseCallTROJ_GEN.R002H0CE822
IkarusTrojan-Spy.MSIL.Agent
FortinetW32/GenKryptik.ERHN!tr
BitDefenderThetaGen:NN.ZemsilF.34666.wu0@a8zAA1e
AVGWin32:PWSX-gen [Trj]

How to remove UDS:Backdoor.Win32.Manuscrypt?

UDS:Backdoor.Win32.Manuscrypt removal tool
  • 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.

About the author

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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