MALICIOUS — lcss.exe

MALICIOUS — lcss.exe is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (98/100), attributed to the KmJfa4pdRVd family. 6 of 55 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

SHA-256: 4465af8f617a9d06e109204d6d93fd887d87e020a66236889a249e2474cf3ba6
SHA-1: 98bd3d70e26a6ba405b970116aa959cb0bccf3b1
MD5: 4e78fff6aed5883e66c77afb72b1a18e
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1UsPyrN/sVywaEj1UsEOBYJijGMq7uHMUGo6kKBRkd:Nh9wv1U7h9wv1Ut3kjGMqCGo6Qd
TLSH: T1554012036A5784F5C6F3BE781928C1ECEC526F580E329D8499055BEF901D72BA1E4E8C
Submitted as: lcss.exe
File type: pe · Size: 175616 bytes
Verdict: malicious (98/100) · Family: KmJfa4pdRVd

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 19 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\net.cpl - 7fb4afef7677b5d5a0b1eb5e4f5cc06bc9bd11ce1bb68543b0c0c2a3dd1ae84e
C:\Windows\System32\wlogon.dll - 7c580143408b551e456d285ffcd57176dda5016aadd645901111629fcd74b812
C:\Windows\System32\crypto.dll - 5593eb702023ec5f7e2357c090039922223ebf70eb30b19b26bc945faec8ce50
C:\Windows\System32\lcss.exe - d7ffc4746deb4d1d7eec6d8e41a98941186a43c510838118fa7c273151ad6527

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=1787647416&P2=404&P3=2&P4=jXw%2ftxNCrZb%2fzvq%2fDwip4%2brttmjljd7opwfKzNeDoIK%2fIp5f8VwHUR8TpIMVPtl4JK%2b%2blvLFFkf7sGZR8jIo9w%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

20.50.201.195
4.230.171.124
52.253.84.76
4.247.188.233
74.178.240.61
20.89.1.13
74.178.240.51
52.123.128.14
20.236.44.162
40.104.4.2
52.123.252.204
135.233.45.221
92.223.78.30
203.26.79.13
52.148.114.188
72.145.35.105
74.178.76.44
52.110.12.21
52.110.12.4

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report