MALICIOUS — a3f89a189d590dd5f67e583cc530daf92fff3f3ef87ad28e9239471210dcdbd1

MALICIOUS — a3f89a189d590dd5f67e583cc530daf92fff3f3ef87ad28e9239471210dcdbd1 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (98/100), attributed to the LmJfa4pdRVd family. 5 of 51 detection engines flagged it, exhibiting 2 ATT&CK techniques.

Identification

• SHA-256: a3f89a189d590dd5f67e583cc530daf92fff3f3ef87ad28e9239471210dcdbd1
• SHA-1: 703a8f4d3d835cc56ddc7610f5ac05bda7767f35
• MD5: 9c24e96c3ccb61ed2729625389e5cfeb
• imphash: e60d0e6577962a1096407913ed128742
• ssdeep: 3072:IyrN/sVywaEj1UsPyrN/sVywaEj1Us10nfGxcwfjfz1ruLaIKKDqPJ:Nh9wv1U7h9wv1UvOtfQeiqJ
• TLSH: T1A0411203E895E0BCD1D3BFA419E4B26CF8B5862C093215C079455E5F9029B43B6E8BCD
• Submitted as: a3f89a189d590dd5f67e583cc530daf92fff3f3ef87ad28e9239471210dcdbd1
• File type: pe · Size: 192000 bytes
• Verdict: malicious (98/100) · Family: LmJfa4pdRVd

Detections (5 of 51 engines)

• MalwareAnalyser heuristics (entropy/packer): UPX
• ClamAV (daily): Win.Ransomware.Somhoveran-9870372-0
• Microsoft Defender: Trojan:Win32/Vindor!pz
• Emsisoft (Emergency Kit): Gen:Trojan.ShellHook.lmJfa4pdRVd
• Kaspersky (KVRT): Worm.Win32.Wenper.b

MITRE ATT&CK

• T1543.003
• T1112

Why this verdict

The malicious score of 98/100 is the fusion of 7 weighted signals:

• ClamAV (daily) flagged Win.Ransomware.Somhoveran-9870372-0 (rule Win.Ransomware.Somhoveran-9870372-0) - engine signal, weight 0.90, confidence 0.95
• Memory forensics: 4 finding(s), e.g. RWX/private injected region in taskhostw.exe (pid 6748) (rule windows.malfind.Malfind) - memory signal, weight 0.60, confidence 0.85
• Observed at runtime: Windows Service (T1543.003) (rule Windows Service) - dynamic signal, weight 0.40, confidence 0.90
• 1 behavioral detection(s): Windows Service Installation [medium] (rule tl-service-install) - dynamic signal, weight 0.40, confidence 0.90
• Contacted 24 external host(s) at runtime (5 HTTP) - network signal, weight 0.40, confidence 0.80
• Packing/obfuscation: UPX, high-entropy-sections:UPX1 - static signal, weight 0.25, confidence 0.55
• Observed at runtime: Modify Registry (T1112) (rule Modify Registry) - dynamic signal, weight 0.12, confidence 0.90

Dynamic analysis (windows)

315 behavior events · 2 ATT&CK techniques · 4 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• inference.location.live.net
• to-do.office.com
• staging.to-do.officeppe.com
• teams.cloud.microsoft
• outlook.office.com
• outlook.office365.com
• outlook.cloud.microsoft
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl
• http://203.26.79.13/filestreamingservice//files/2cbcf400-ac8d-4d86-9d69-c7f0dff56d2e/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
• http://203.26.79.13/filestreamingservice/files/2cbcf400-ac8d-4d86-9d69-c7f0dff56d2e?P1=1787095082&P2=404&P3=2&P4=CtiHa6A9a4zeRMlLAj4UCjIYNWEtRDJhkA4683DREULSFauBxJV6nGRK5A2yVA3VJjQZ%2fWh2mCW4EyethIxggA%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
• 23.40.52.85
• 23.11.37.157
• 20.190.167.148
• 4.150.223.100 US · Des Moines · AS8075 Microsoft Corporation
• 150.171.22.17

Dropped files

• /opt/CAPEv2/storage/analyses/30815/files/2a5e38d5d14f74e9698f1326b38a784df36290e354fc2056abae5dd4205098f9 - 2a5e38d5d14f74e9698f1326b38a784df36290e354fc2056abae5dd4205098f9
• /opt/CAPEv2/storage/analyses/30815/files/f050ee21ccef7a1611fe1bce48c10de32542601a8ae561bf78c9244efaaf2bec - f050ee21ccef7a1611fe1bce48c10de32542601a8ae561bf78c9244efaaf2bec
• /opt/CAPEv2/storage/analyses/30815/files/5368f4d612c82f49aedbb61469922e0645732eb4887446a3c5fd92d967d635db - 5368f4d612c82f49aedbb61469922e0645732eb4887446a3c5fd92d967d635db
• /opt/CAPEv2/storage/analyses/30815/files/286f8ab41e6085a1b66014de1cf5250443b857b07e3c52d3b7e9e1272b0f2627 - 286f8ab41e6085a1b66014de1cf5250443b857b07e3c52d3b7e9e1272b0f2627

Embedded URLs

• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl
• http://203.26.79.13/filestreamingservice//files/2cbcf400-ac8d-4d86-9d69-c7f0dff56d2e/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
• http://203.26.79.13/filestreamingservice/files/2cbcf400-ac8d-4d86-9d69-c7f0dff56d2e?P1=1787095082&P2=404&P3=2&P4=CtiHa6A9a4zeRMlLAj4UCjIYNWEtRDJhkA4683DREULSFauBxJV6nGRK5A2yVA3VJjQZ%2fWh2mCW4EyethIxggA%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

• 4.150.223.100
• 4.247.188.233
• 52.110.12.40
• 52.110.12.45
• 4.230.171.124
• 172.215.188.225
• 20.165.94.63
• 135.232.92.97
• 52.123.128.14
• 40.99.134.2
• 72.153.5.138
• 203.26.79.13

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report