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: 4228fcf5dcd52290809b8305c099732335c3cb3e80715098ce982fc88fb55ca9
SHA-1: 09dbe69cfaddcfe8cb6fe31b7236b37859da93d3
MD5: 0636c7abcf00d60cc71e8c1b0b648f42
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1Us10nfbyrN/sVywaEj1UszBhMCWeZMezA6uLIG3ezeGN+jEuWD5:Nh9wv1Uveh9wv1UDC8sA6IOzeG1p5
TLSH: T18742120B5575827CD2FBB8E81D59A62FB8866B3C1931948054426FAF000CB37BCAD6DD
Submitted as: crypto.dll
File type: pe · Size: 211456 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.mmJfa4pdRVd
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 21 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)

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

Dropped files

C:\Windows\System32\net.cpl - aa0d16b5cb4648702060ae009496955c992c9a1e1a8a51fa4a78858910386c96
C:\Windows\System32\crypto.dll - 885342c064df9f6c98048b1c154804d5247eb49bdc7faf66851c735bc7a795e6
C:\Windows\System32\wlogon.dll - 5e27a805e1b493ca70154aa2534611cae41d571e7557efaf9947bfc10c6f6185
C:\Windows\System32\lcss.exe - 2570f30c46d0cc7b73c9e32b2a1250207b230b22430759275fe11a472441000c

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=1787653450&P2=404&P3=2&P4=Tlr%2b391H2Ux4j1YqYZFE3CXO17MFjUisKylKd643o6AIkmqABMXWIfugmcggWnz8nZdpkBMLe34lKgtqtNguPw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

203.26.79.13
20.89.1.10
20.247.185.124
4.230.171.124
40.84.97.4
74.178.76.128
74.178.240.51
51.132.193.105
20.236.44.162
52.123.129.14
52.123.128.14
40.103.64.242
52.168.117.171
72.153.5.128
135.233.95.80
172.178.240.163
52.110.12.54
52.148.114.188
72.145.35.104
20.165.94.46
52.110.12.5

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report