MALICIOUS — 1bfb41a19de49c9c0dc63f434ff46f51ccba78e25629031bfda16e56b0f09df9.exe

MALICIOUS — 1bfb41a19de49c9c0dc63f434ff46f51ccba78e25629031bfda16e56b0f09df9.exe is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the Qwexlafiba family. 8 of 53 detection engines flagged it, exhibiting 4 ATT&CK techniques.

Identification

• SHA-256: 1bfb41a19de49c9c0dc63f434ff46f51ccba78e25629031bfda16e56b0f09df9
• SHA-1: 6b610c48d11f8876b97c8bbdb6e9bf112ce63362
• MD5: e76d61ff0b8f528fa958b514f9a521dc
• imphash: 75c721f1755f04cc47f7598bb55e4e6f
• ssdeep: 393216:V2xiFxbwpaNCl2xiFxbwpaD2xiFxbwpag2xiFxbwpaX:cUFxMpQCMUFxMpxUFxMpmUFxMpA
• TLSH: T15E6D12CE8716A320D6F0E920785096ED3413B084A5BD2DDC4B43D67D22E19FFB97A14A
• Submitted as: 1bfb41a19de49c9c0dc63f434ff46f51ccba78e25629031bfda16e56b0f09df9.exe
• File type: pe · Size: 12809272 bytes
• Verdict: malicious (99/100) · Family: Qwexlafiba

Source: MalwareBazaar · first seen 2026-07-29T00:00:00.000Z · SHA-256 verified

Detections (8 of 53 engines)

• capa (capabilities): capability:execution/powershell
• MalwareAnalyser heuristics (entropy/packer): Microsoft Linker
• YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
• YARA: Trellix/McAfee ATR: ATR_LockBit_Ransomware
• Hash: abuse.ch ThreatFox: known-malicious-hash
• Detect It Easy (packer/type): DIE:Microsoft Linker
• Microsoft Defender: Trojan:Win32/Qwexlafiba!rfn
• Kaspersky (KVRT): not-a-virus:HEUR:RemoteAdmin.Win32.ConnectWise.gen

MITRE ATT&CK

• T1059.001
• T1057
• T1056.001
• T1112

Why this verdict

The malicious score of 99/100 is the fusion of 11 weighted signals:

• Hash: abuse.ch ThreatFox flagged known-malicious-hash (rule known-malicious-hash) - engine signal, weight 0.90, confidence 0.95
• Microsoft Defender flagged Trojan:Win32/Qwexlafiba!rfn (rule Trojan:Win32/Qwexlafiba!rfn) - engine signal, weight 0.55, confidence 0.85
• execute via PowerShell (rule execute via PowerShell) - capa signal, weight 0.40, confidence 0.80
• capture keystrokes (rule capture keystrokes) - capa signal, weight 0.40, confidence 0.80
• YARA: JPCERT/CC flagged JPCERT_HUILoader_PlugX_SideLoad (rule JPCERT_HUILoader_PlugX_SideLoad) - engine signal, weight 0.35, confidence 0.70
• YARA: Trellix/McAfee ATR flagged ATR_LockBit_Ransomware (rule ATR_LockBit_Ransomware) - engine signal, weight 0.35, confidence 0.70
• Detect It Easy (packer/type) flagged DIE:Microsoft Linker (rule DIE:Microsoft Linker) - engine signal, weight 0.35, confidence 0.70
• Embedded network infrastructure: https://feedback.screenconnect.com/Feedback.axd, https://check.screenconnect.com/InstallerOriginInfo.axd, 1.101.3.4 - static signal, weight 0.35, confidence 0.60
• Packing/obfuscation: Microsoft Linker - static signal, weight 0.25, confidence 0.55
• enumerate processes (rule enumerate processes) - capa signal, weight 0.20, confidence 0.60
• Observed at runtime: Modify Registry (T1112) (rule Modify Registry) - dynamic signal, weight 0.12, confidence 0.90

Dynamic analysis (windows)

878 behavior events · 1 ATT&CK techniques · 7 dropped files.

Runtime network

• none

Dropped files

• f45b1579759f68a7c45887c3fcda4e3d8ea2fb0203d07ebe09bf7364d0e49246 - f45b1579759f68a7c45887c3fcda4e3d8ea2fb0203d07ebe09bf7364d0e49246
• e92d94613443befebb55b08f80d10a2fdbfc58233e8dc95cfb4466fde12964f7 - e92d94613443befebb55b08f80d10a2fdbfc58233e8dc95cfb4466fde12964f7
• e0f777bb8e11a6e89684cfd3d71aee6f0c2caa9a86862950f1139042aa0bf870 - e0f777bb8e11a6e89684cfd3d71aee6f0c2caa9a86862950f1139042aa0bf870
• 19ac323ca6eae2f8145cdc2bac865b32cd5a48ad6ff199d4ca7da214b056e1dc - 19ac323ca6eae2f8145cdc2bac865b32cd5a48ad6ff199d4ca7da214b056e1dc
• c907940868c4041b0dcea02e961a5e69b6c9394be0de31deb1c21cc3562f48ee - c907940868c4041b0dcea02e961a5e69b6c9394be0de31deb1c21cc3562f48ee
• dbf379b93127345a83282380aee634d0b70ec731acfeea76617c76e76fdc764f - dbf379b93127345a83282380aee634d0b70ec731acfeea76617c76e76fdc764f
• 320b89343e896a8d2ebf537861d800a9aca88245cc3b5616bb5bea5cc6797fbb - 320b89343e896a8d2ebf537861d800a9aca88245cc3b5616bb5bea5cc6797fbb

Embedded URLs

• http://www.digicert.com/CPS0
• https://feedback.screenconnect.com/Feedback.axd
• https://check.screenconnect.com/InstallerOriginInfo.axd

Embedded domains

• cacerts.digicert.com
• crl3.digicert.com
• www.digicert.com
• crl4.digicert.com
• ht.cn
• efc.be
• instance-jg6vb3-relay.screenconnect.com
• feedback.screenconnect.com
• check.screenconnect.com

Embedded IP addresses

• 1.101.3.4

File paths

• C:\Users\jmorgan\Source\cwcontrol\Custom\DotNetRunner\Release\DotNetRunner.pdb
• C:\builds\cc\cwcontrol\Product\Core\obj\Release\net20\ScreenConnect.Core.pdb
• X:\:b:f:l:p:
• X:\:`:d:h:l:p:t:x:
• T:\:d:l:t:
• T:\:d:
• C:\builds\cc\cwcontrol\Product\Windows\obj\Release\net20\ScreenConnect.Windows.pdb
• C:\builds\cc\cwcontrol\Product\WindowsInstaller\obj\Release\net20\ScreenConnect.WindowsInstaller.pdb
• C:\builds\cc\cwcontrol\Product\ClientInstallerRunner\obj\Release\ScreenConnect.ClientInstallerRunner.pdb
• C:\Users\jmorgan\Source\cwcontrol\Custom\DotNetRunner\DotNetResolver\obj\Debug\DotNetResolver.pdb
• E:\delivery\Dev\wix37_public\build\ship\x86\SfxCA.pdb
• X:\:`:d:h:x:
• C:\build\work\eca3d12b\wix3\build\ship\x86\wixca.pdb
• X:\:
• Q:\:a:f:

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report