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: 7dc8c456e7c89f68bf199a73ebbda86425e82c380c183a498a9a16b056ad4207
SHA-1: b28274c0376cf308b7cec1ee356e9b1c7e7a566f
MD5: 78263fb72a36b4b56567a92c35f73ff4
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1UsPyrN/sVywaEj1Us10nfcxMxX:Nh9wv1U7h9wv1UvEE
TLSH: T1F83C0207BA90A0BCE5D7BDA86C94E26DF8455E2C14315DC03D836BAE801C723B498EDD
Submitted as: lcss.exe
File type: pe · Size: 119808 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.hmJfa4pdRVd
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 23 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)

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

Dropped files

C:\Windows\System32\wlogon.dll - 58a5f8c9397128a71a75481d10b5dcc15d7547e872a4030ab889e899a9a159d3
C:\Windows\System32\lcss.exe - 15e00e425834f38cb9339cd102c01eb9955163ab17216ddee413d55f502f5e6a
C:\Windows\System32\crypto.dll - 764ce1e65230dbbb6f0221bd16abb433898f4d50065d2ebcf95e807cdb0b31d1
C:\Windows\System32\net.cpl - 65c6032e578c5191de3f40ffc80ff03dd6cb884f85d1d9c077ff383a17e3729a

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=1787650272&P2=404&P3=2&P4=nESluVfp8o%2bd5CQj9HgsdqBqZbKumDOPhmfAeDpA08RriqutqwwY7Loj0sK1WU7eIPFMVa6KcSVzTb%2bePYyK%2bw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

20.50.201.206
203.26.79.13
52.123.252.194
20.42.73.30
4.230.171.124
4.247.188.224
20.247.184.197
135.232.92.137
135.232.92.97
20.42.73.28
20.112.250.133
40.103.64.242
52.123.129.14
172.66.2.5
52.123.252.241
135.233.95.80
52.123.252.229
172.178.240.161
92.223.78.30
52.148.114.188
52.110.12.10
72.145.35.107
52.110.12.37

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report