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 52 detection engines flagged it, exhibiting 3 ATT&CK techniques.
Identification
- SHA-256:
314977af1c799869a4dfef8855f2f3bc5098f6a0afd4ad70d2274b04693ecb5d - SHA-1:
a1b77b1b8cd10a69ea893abf004741daee7926b0 - MD5:
55514adc83cbe387a77e5a44b2dd3cd7 - imphash:
e60d0e6577962a1096407913ed128742 - ssdeep:
6144:Nh9wv1U7h9wv1Uvab+Y+yT/GWWAlb5T6c:Nh9wtMh9wt4ab+vybNlVL - TLSH:
T18642120765D1A4FCEB93BCF89C98B61D94664A2D3831CDC0664267AC901DB67B0A0FCD - Submitted as: lcss.exe
- File type: pe · Size: 207872 bytes
- Verdict: malicious (97/100) · Family: Somhoveran
Detections (5 of 52 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.mmJfa4pdRVd
- 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)
317 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
- settings-win.data.microsoft.com
Dropped files
- C:\Windows\System32\net.cpl -
732d12d8eb02d382cfb73e253a853d1dc8599f02ac7d00dd5e9758ded860da5e - C:\Windows\System32\lcss.exe -
98224baf8ef6ae36fcf36ef4352391ef994730871cfbc76963847a30dfb9de84 - C:\Windows\System32\wlogon.dll -
3ed821485ac97249b303d84960d3c69863852ddb25236fe4916ec0c4017f2359 - C:\Windows\System32\crypto.dll -
0ab498c6c2a700d07b58a5013239627cd84260b855206c5ce91b08883e33c0c2
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=1787657838&P2=404&P3=2&P4=L04Z7wBZAKgUOuepfljzUemiLXPxbUoi%2f%2fNXHlYhxtV%2bOivhS04Gi5%2byOoKKWKVLHkrRcvoDyKUGYY7cfrkv%2bA%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded IP addresses
- 52.110.12.37
- 52.110.12.5
- 4.150.223.109
- 20.42.179.192
- 4.230.171.124
- 20.247.184.142
- 74.179.77.204
- 52.168.117.169
- 74.178.240.51
- 20.76.201.171
- 52.123.128.14
- 40.104.4.2
- 20.52.64.200
- 52.123.252.223
- 13.89.179.15
- 203.26.79.13
- 135.234.160.246
- 162.159.142.9
- 52.148.114.188
- 74.178.76.44
- 52.110.12.51
- 72.145.35.108
- 52.110.12.44
More Somhoveran samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report