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: bad105a6cb0f0130691a10c27e5aaad80d9cc169874f684805536d57e9a3ab6a
SHA-1: c4891b0b2088726448f13558da86e9e694786102
MD5: 37bfa9f9835ef4aeadffd058f7f5043e
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1UsEOBYJwyrN/sVywaEj1UsOyPS4m2q+v93YHf+zTI2:Nh9wv1Ut3nh9wv1U72tl3++zk2
TLSH: T12A3F02072157D8FED5D3BE506C64C34CE8524FA86622AEC449027BDF6059B2BA1D0ECE
Submitted as: crypto.dll
File type: pe · Size: 159232 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.jmJfa4pdRVd
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 16 external host(s) at runtime (14 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)

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

Dropped files

C:\Windows\System32\crypto.dll - d0d39c2a6015e466368ad60c2ca9270a291def86dce42f41370a5652d4126fbc
C:\Windows\System32\net.cpl - e1c90ab2f6ac77a1d2304c1d37c30fb7aab5db4b0d67e455d3578d811ea48506
C:\Windows\System32\wlogon.dll - b79da04585cc0f4c970b9c18f19534927d03b94281046561e2573ec0611dcf17
C:\Windows\System32\lcss.exe - f55cdb92f5a907f120a87d86e3c87a52619184811fdd43169ce03ffa2b74bc8c

Embedded URLs

http://www.msftconnecttest.com/connecttest.txt
http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
http://rb.symcb.com/rb.crl

Embedded IP addresses

135.233.95.80
72.153.5.62
20.42.73.25
48.211.4.16
20.247.184.197
4.230.171.124
20.42.65.84
20.236.44.162
135.232.92.137
135.234.160.244
52.168.112.66
74.178.232.29
52.148.114.188
74.178.240.61
52.110.12.54
172.66.2.5

More Somhoveran samples · Latest analyzed threats · ATT&CK coverage

Analyzed on MalwareAnalyzer by Cyble · Open interactive report