MALICIOUS — crypto.dll

MALICIOUS — crypto.dll 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: 5c7f136fc313d412cc9fe204ada6f6662ff243ef0d770e52d1c358e445d195aa
SHA-1: 5ff574b0d93339bc41237e6ff1c58a9cc1b3cea8
MD5: bfb4091e8c498111cd4ea4874fc4e00d
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1UsEOBYJwyrN/sVywaEj1UsWnc1:Nh9wv1Ut3nh9wv1UXc1
TLSH: T1F43C0107A642D4F8D1E3FE695C28C25DF8525F680D359D8019026FEB604DB2BB5E8ACC
Submitted as: crypto.dll
File type: pe · Size: 116224 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 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\lcss.exe - 858ea32a26c438a214e620344d7d013bd779ec2ac6cb0f0a16d62e2f583e3ad8
C:\Windows\System32\wlogon.dll - 596afcb597b09b5d0b13e29c9252554445bb7875e0934fbf7e5a704d56e96544
C:\Windows\System32\net.cpl - 0944fe9e4d949fdfd3f2cc4f1589e5c7d7c516d3bbfdabc0a6e084a4bb9586cc
C:\Windows\System32\crypto.dll - 5586c8ca3b75f6dfc3fb7e3efc93081ef5cca9eb2c8a13e709014fd5748ec578

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=1787674229&P2=404&P3=2&P4=KmF3%2f6nFAO0zE39frhXwzcNoi4X8GEEBMHxOTnVD8h3aUCIbgECvuNKKMUsn5UhHNbIGyKYoaAl%2bxXE9y6AF2Q%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

20.184.175.2
74.179.71.159
52.230.60.54
85.210.193.152
4.230.171.124
74.179.77.204
20.165.94.54
20.42.73.30
51.105.71.136
203.26.79.13
20.76.201.171
52.123.128.14
135.232.92.34
172.178.240.162
72.154.7.100
52.110.12.52
52.148.114.188
92.223.78.30
52.110.12.33

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report