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: a7f0d01c174330ba7630dd1edc4aff444a788bcbee3b3b18a0c201fb2f138797
SHA-1: ef4fd54b4864c8f980f172dae449ccca98ca040c
MD5: 92bb7c00f484b8f6c6639286a812b4cd
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1UsEOBYJwyrN/sVywaEj1Usr68jljZu/vVzBeRRQNj8k4j:Nh9wv1Ut3nh9wv1UcjlMv7Bw3
TLSH: T142421307A590F0FAEAE33AB42945D62DD495DF68493D6AC088001EEB601E70735F9ECD
Submitted as: crypto.dll
File type: pe · Size: 204800 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)

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

Dropped files

C:\Windows\System32\lcss.exe - 6db658523875bb4147074d7ea610b477b0894c65648c7451e5f83a951148a883
C:\Windows\System32\crypto.dll - c3461f3dd5de2c6e84bff2a5740e18e05f68396cd7ed498709d73f4d00a35235
C:\Windows\System32\net.cpl - 536ead4743f10f060d98844782608036c292a3b5adcab7ac3e030285574dcf55
C:\Windows\System32\wlogon.dll - 7a26b66ff03201cb1c2eeb37b730c789398fb07ef414c4e003614fba2c49bc48

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=1787665873&P2=404&P3=2&P4=KRAqoG3SPdyDKSGum60KePmljvQc7fuem3brBTE5B01ODsMdrHnRRyZxj63B9t0YS0hPFOYj6Ai67LEu%2fR4Z8Q%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

52.178.17.234
57.155.101.212
4.230.171.124
20.247.184.142
74.178.240.61
135.233.95.135
51.132.193.104
40.99.133.226
40.99.134.2
20.76.201.171
52.123.129.14
172.66.2.5
20.184.175.1
135.233.45.222
135.233.45.221
203.26.79.13
72.154.7.105
20.165.94.46
52.123.252.192
52.148.114.188
52.110.12.45
52.110.12.50

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report