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: fe2d75ebc10297f29d50b112b313fd719f6788031972ec76db60282828a33bc7
SHA-1: 41abb51963d325fa6c434d893ec0eccc2db93883
MD5: a606b305b9d5a109c88e368b027a000f
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1Us10nfbyrN/sVywaEj1UsuHF7iU/EmuAHJomV19vK8OJVx5gLcA:Nh9wv1Uveh9wv1UNBluAHZOva07q
TLSH: T19E421207A9C0A5BDC5E775F5184CD76EF89A2E1C7C3051841E812B2F6168F4B389A2DC
Submitted as: crypto.dll
File type: pe · Size: 210944 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 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)

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

Dropped files

C:\Windows\System32\net.cpl - f28f5b0a18bfe49352f3adeead848d969b71319e2945a5a9f6aa1235e99b166d
C:\Windows\System32\wlogon.dll - 956d283a3913ceb0e17054c90c5d07cc1457605e97032d20010b821efe4c7883
C:\Windows\System32\crypto.dll - 78b56cd4149f6e45ddb42efe9da9de8a784fc1a65b459b79bef36f3f36a29d5f
C:\Windows\System32\lcss.exe - b1f7c763ae93df66a31f92777622d0185bb32a660f65b8de196a5a5d0808b332

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=1787656176&P2=404&P3=2&P4=ggTzxw8i59%2bChjZQgPVAYFmejOW6U6YGXZ%2fX4hlWAjhxuK0ci8xqPsWlCdlgQP%2fs37APq%2fP4FfHH8kxjsHtHSg%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

52.123.252.204
92.223.78.30
4.207.44.77
57.155.101.212
4.230.171.124
20.247.184.197
135.233.95.144
51.132.193.105
135.233.95.135
135.232.92.137
52.123.128.14
20.231.239.246
40.103.64.242
20.184.175.0
72.145.35.112
20.184.175.14
135.234.160.244
203.26.79.13
20.165.94.46
52.148.114.188
52.110.12.40
52.110.12.3

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report