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:
0fff2a783314434794883db4c23a0a623ced7f3acf3f1a411555717cde985222 - SHA-1:
10fccae69e1850730f98b6e7f9f345e39916e809 - MD5:
6da1b742a9e70aa81eb8ececeaf6723b - imphash:
e60d0e6577962a1096407913ed128742 - ssdeep:
3072:IyrN/sVywaEj1UsEOBYJwyrN/sVywaEj1UsDIZR3A2TL09wPaMVjIsNtntCHeDNv:Nh9wv1Ut3nh9wv1UKIZCE3VksNxMeDNv - TLSH:
T13B41120E396689A8D8D2AD891C0DD1ADEC94CF8819149D441E076FFB5121B3F36B8ECC - Submitted as: crypto.dll
- File type: pe · Size: 190464 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.lmJfa4pdRVd
- 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 (18 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)
314 behavior events · 2 ATT&CK techniques · 4 dropped files.
Runtime network
- www.msftconnecttest.com
- rb.symcd.com
- rb.symcb.com
- inference.location.live.net
- to-do.office.com
- staging.to-do.officeppe.com
- teams.cloud.microsoft
- outlook.office.com
- outlook.office365.com
- outlook.cloud.microsoft
- ctldl.windowsupdate.com
- login.live.com
- ocsp.digicert.com
- desktop-hsgcbep
- v20.events.data.microsoft.com
- config.edge.skype.com
- licensing.mp.microsoft.com
- settings-win.data.microsoft.com
- msedge.api.cdp.microsoft.com
- windows.msn.com
Dropped files
- C:\Windows\System32\net.cpl -
dacba6831c0fa8ddc0d99174e033e73b1de0a8f6e125d8802989483c5182eb90 - C:\Windows\System32\crypto.dll -
3984dc53909bd4ef0e69a64b52312b2ec816e7934b5426f42ecb1c4ed08d0d67 - C:\Windows\System32\wlogon.dll -
d7c67839b1a7c379c5e08c713981d30065670819757c74bb241133c0d2d73dbb - C:\Windows\System32\lcss.exe -
f818e5717914bbcf614bedfa4512a7ded3a9e7b35c3258db319fd6e83b8f4c2a
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=1787654454&P2=404&P3=2&P4=EvDq8xiAVWZ4J8DPMbefLstrc5gCBw4JUBocovpCZxlZ7XGrMy1PuIQcx6Y8%2bJUZ%2fkxjK9t3PW9hEiw%2fZxm5Uw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice//files/c74a5353-3e6a-42b7-94d6-9b96c560c89a/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/c74a5353-3e6a-42b7-94d6-9b96c560c89a?P1=1787654493&P2=404&P3=2&P4=SmZ7oYyLKmtifhBepNkuSvAdbLb2XlaqlodhQ3SfKC2aQ9hzq7ZxNESk%2fbXBX1LyD9d9DZVt2sxjJA5XeaMkHQ%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded IP addresses
- 203.26.79.13
- 51.105.71.137
- 20.247.184.197
- 20.165.94.63
- 20.184.175.15
- 4.230.171.124
- 57.154.63.210
- 74.178.76.54
- 20.184.175.16
- 20.231.239.246
- 52.123.129.14
- 172.217.25.163
- 135.233.95.80
- 172.66.2.5
- 135.234.160.244
- 72.153.5.129
- 20.165.94.46
- 52.123.252.236
- 52.148.114.188
- 52.110.12.33
- 52.110.12.30
More Somhoveran samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report