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: 8e48a6e095057dae555b62217d23e1c48f0275e3178f7ab589feb7dfd9fe6a0b
SHA-1: af584858f27d5d44a3bd6f095b7027396b1ee973
MD5: 2efe8b1e1aa336b5a4098a1c3e120282
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1Us10nfbyrN/sVywaEj1UsbuaRo2ANyxkhC5w:Nh9wv1Uveh9wv1UCRsNyxkY5w
TLSH: T1F93E020796C5E07CF1D6FCF42DC4E16DB8615A2C5A305AC07CC267AB802D7A36498ADE
Submitted as: crypto.dll
File type: pe · Size: 145408 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.imJfa4pdRVd
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 22 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)

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

Dropped files

C:\Windows\System32\crypto.dll - 548a95402765fc2480698634a3d344db93c3cb39c20d89a3b2b4da4fa24fd398
C:\Windows\System32\net.cpl - c9a6fcac43310adc6204b2550dc15cc61297ecfae892edc00b149c2191f7e9c9
C:\Windows\System32\lcss.exe - d820bd99741bd9a3a4849401c81e5091d86b8998c051bec1068f243f969fac11
C:\Windows\System32\wlogon.dll - 4d9cb64f2c5f1b435e6bbcd9ba5fc90fd1c0562aed6107037d5ba72442e52da8

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=1787650323&P2=404&P3=2&P4=eRehmcloB86JfDXFQt8sZrJ50GY6Bq7S6KJ9zyGDR8QGBxQ8khSw6ImnMPwF30S1z8OYP9VD5hLAYdRWveEMMA%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

135.233.95.80
92.223.78.30
52.110.12.25
52.123.252.243
20.42.73.30
172.215.188.225
4.230.171.124
20.247.184.197
135.232.92.137
135.232.92.97
4.150.223.113
20.112.250.133
172.66.2.5
52.123.129.14
172.178.240.161
172.178.240.162
52.123.252.213
203.26.79.13
52.148.114.188
72.145.35.107
52.110.12.26
52.110.12.15

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report