MALICIOUS — lcss.exe

MALICIOUS — lcss.exe is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (98/100), attributed to the Somhoveran family. 6 of 55 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

SHA-256: 6b3056a6776efabe4e38d0847395e4045536d73cab07859021be55ec6bc71d44
SHA-1: 87c7c6140358e92e1635df4dd26ad82c304e4c89
MD5: c3f7eee23c5a09fdba66ef0160e78749
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1UsPyrN/sVywaEj1UsEOBYJSOdI1rucPI0OUUb8kqPJdf9R:Nh9wv1U7h9wv1Ut3M6o67ab
TLSH: T1714012037486E5B4D9D7FDA41C98C24E94430F680A3A58807A075FEF504A767BBE8E4E
Submitted as: lcss.exe
File type: pe · Size: 177664 bytes
Verdict: malicious (98/100) · Family: Somhoveran

Detections (6 of 55 engines)

MalwareAnalyser heuristics (entropy/packer): UPX
ClamAV (daily): Win.Ransomware.Somhoveran-9870372-0
Detect It Easy (packer/type): DIE:Turbo Linker
Microsoft Defender: Trojan:Win32/Vindor!pz
Emsisoft (Emergency Kit): Gen:Trojan.ShellHook.kmJfa4pdRVd
Kaspersky (KVRT): Worm.Win32.Wenper.b

MITRE ATT&CK

Why this verdict

The malicious score of 98/100 is the fusion of 8 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 21 external host(s) at runtime (16 HTTP) - network signal, weight 0.40, confidence 0.80
Detect It Easy (packer/type) flagged DIE:Turbo Linker (rule DIE:Turbo Linker) - engine signal, weight 0.35, confidence 0.70
Packing/obfuscation: UPX, high-entropy-sections:UPX1, Turbo Linker - 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)

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

Dropped files

C:\Windows\System32\lcss.exe - 0ba1daac82160f09f6dc749d81b64b4077b8fd90a3663ebbf3f25e53cfad9ee0
C:\Windows\System32\net.cpl - fa5df78c281d0991c7f17e9c21d2101ba91fe0cf002a54b50d9ac44bd2dad168
C:\Windows\System32\crypto.dll - ed67688ab4647b08494751c5678049002ebe68775e3e0d2f3fa6c2e1f40594ab
C:\Windows\System32\wlogon.dll - 600443dfad16e3c105ee38d947db86af409ac21088954ea1d9829437404624da

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=1787655907&P2=404&P3=2&P4=JXmhIokunvrjhtEQNR6cZ%2fVYjDrObw2U2Ij3t%2feIxbwEOz0pb7e%2fDJ45qhOq%2bvjjGKD5ics61zNgW6yYtSfiLg%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

72.145.35.97
74.178.232.29
20.184.175.9
4.230.171.124
20.42.179.192
52.230.60.54
20.42.179.204
74.178.240.61
135.233.95.135
20.52.64.201
20.231.239.246
52.123.129.14
40.99.133.226
74.178.76.128
203.26.79.13
135.232.92.137
135.233.45.222
52.148.114.188
72.153.5.140
52.110.12.52
52.110.12.22

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report