MALICIOUS — lcss.exe
MALICIOUS — lcss.exe is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (97/100), attributed to the Somhoveran family. 5 of 55 detection engines flagged it, exhibiting 3 ATT&CK techniques.
Identification
- SHA-256:
be6106393f42ce6b0adc4b137efa73d026c02710ec079f1cc8a4b2b2a70edde4 - SHA-1:
c30fbf2db7a01b542d3fc7392160677686e61e6c - MD5:
23b451d4e6cc2b6dbdaf17113358a0b6 - imphash:
e60d0e6577962a1096407913ed128742 - ssdeep:
3072:IyrN/sVywaEj1UsPyrN/sVywaEj1Us10nfYxDjrP6HF9AhDO1:Nh9wv1U7h9wv1UvAJvCHT - TLSH:
T1003E0203DAC5E4BDF4F7FCA41C90A36DB95A5F2C283119847C432B6A801C7A7A594ACD - Submitted as: lcss.exe
- File type: pe · Size: 137728 bytes
- Verdict: malicious (97/100) · Family: Somhoveran
Detections (5 of 55 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.imJfa4pdRVd
- Kaspersky (KVRT): Worm.Win32.Wenper.b
MITRE ATT&CK
Why this verdict
The malicious score of 97/100 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 - 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 23 external host(s) at runtime (16 HTTP) - network signal, weight 0.40, confidence 0.80
- Packing/obfuscation: UPX, high-entropy-sections:UPX1 - static signal, weight 0.25, confidence 0.55
- Dropped 3 executable file(s) at runtime - dynamic 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)
316 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
- ctldl.windowsupdate.com
- login.live.com
- ocsp.digicert.com
- desktop-hsgcbep
- v20.events.data.microsoft.com
- config.edge.skype.com
- windows.msn.com
- oneocsp.microsoft.com
- www.msn.com
- officeclient.microsoft.com
Dropped files
- C:\Windows\System32\lcss.exe -
fb3a7c2fe3d00396bad1a22f3c8bd11d98369961b4eb9142773546360840cee6 - C:\Windows\System32\crypto.dll -
2e5a30bbdb8ca8d03838f3c8689adb97a2859d0bda2d655a5abaa95e3492c54c - C:\Windows\System32\net.cpl -
83e19bfac6a464ec78583cef125c28bc9b2813196e0dcfa4c1b7891d83088a76 - C:\Windows\System32\wlogon.dll -
5e9f35192f36aadd2c2e7072e4e3e9a9cad85fffcdb448d3fb95adce3ce215ef
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/753bb2df-a166-494f-aa7d-5678b1ef0c56/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/753bb2df-a166-494f-aa7d-5678b1ef0c56?P1=1787664205&P2=404&P3=2&P4=TrCr0caQVS7f%2ftXncV3yE6qFiK9eaX60Il2zY6mzOKlm86xNBK5YaBovDz1tGhzBaf3CSj0r60V0iQjDxg5i1w%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded IP addresses
- 4.150.223.105
- 52.123.252.246
- 4.247.188.233
- 4.230.171.124
- 4.144.132.114
- 74.179.77.204
- 74.179.77.164
- 20.184.175.17
- 74.178.240.61
- 20.236.44.162
- 40.103.64.242
- 52.123.129.14
- 52.123.128.14
- 52.123.252.238
- 135.233.45.221
- 52.123.252.242
- 135.234.160.245
- 203.26.79.13
- 135.233.95.80
- 52.148.114.188
- 72.145.35.114
- 52.110.12.54
- 52.110.12.22
More Somhoveran samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report