MALICIOUS — lcss.exe

MALICIOUS — lcss.exe is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the JmJfa4pdRVd family. 6 of 55 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

SHA-256: 6a7914d29edac2dd6c008ba48a175fa47fe0cf148dd62dbccb83b34ac315949d
SHA-1: 4fa356ae575f0a55775c14a979a46978085f03ec
MD5: bb8af2d334da07dbff5c9bb33c3d1144
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1UsPyrN/sVywaEj1Us10nfIIcmajet/9J/5CDf:Nh9wv1U7h9wv1Uvkzj0/9zC
TLSH: T1CC3F020575D690BDF9C2B9646C98B37DBC413A581032BAC43E422F9B902D77B94D8ACC
Submitted as: lcss.exe
File type: pe · Size: 154624 bytes
Verdict: malicious (99/100) · Family: JmJfa4pdRVd

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.jmJfa4pdRVd
Kaspersky (KVRT): Worm.Win32.Wenper.b

MITRE ATT&CK

Why this verdict

The malicious score of 99/100 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
Dropped a malicious payload (Somhoveran): net.cpl - dynamic signal, weight 0.62, confidence 0.90
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 20 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
Observed at runtime: Modify Registry (T1112) (rule Modify Registry) - dynamic signal, weight 0.12, confidence 0.90

Dynamic analysis (windows)

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

Dropped files

C:\Windows\System32\net.cpl - c745e6e476f554024957ca676712e49eb4a576869e8ace9795fe067415c277fb
C:\Windows\System32\wlogon.dll - 7bc8cada3022a090cda87ea664cea217b56d00e76a9a4cd0080f1664348e4791
C:\Windows\System32\crypto.dll - 2a15f014791c6b546e5f79976face4fb78e7f1019bd75e1dbcbad198a64ed033
C:\Windows\System32\lcss.exe - be6106393f42ce6b0adc4b137efa73d026c02710ec079f1cc8a4b2b2a70edde4

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=1787647951&P2=404&P3=2&P4=Cqg112p0E1YdYtDR9tgezyozrww01VVm%2f93R5qafb5idbXkrvWSmc5b8lcQJLikfoNDJnNNDKlEqWUzqNU5SxQ%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

52.178.17.233
203.26.79.13
4.230.171.124
85.210.196.11
4.144.132.114
135.232.92.137
20.184.175.13
135.233.95.135
20.236.44.162
52.123.129.14
40.104.4.2
135.234.160.246
74.178.240.61
135.233.45.221
52.123.252.247
72.153.5.63
52.148.114.188
52.110.12.22
135.232.92.34
52.110.12.15

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report