MALICIOUS — crypto.dll

MALICIOUS — crypto.dll is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the NmJfa4pdRVd family. 6 of 55 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

SHA-256: 799d6239a2e63a509f86fe94e801d394d663e563ea049f564e92b41e3ed0d048
SHA-1: c1ad8d9ffd292955ca4f4e19ec4add06b912cde2
MD5: cee8441819ea24a6a5584a3a1a621e3b
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 6144:Nh9wv1Ut3nh9wv1UjYD1kyjyywzdANF/S3+l4s:Nh9wtah9wt5uyjy/hAL/Sah
TLSH: T18143120FB853EAE9F6E5FF585D6CA20EB08A4F051E3C7D046E094B6B404475790B8A8C
Submitted as: crypto.dll
File type: pe · Size: 219136 bytes
Verdict: malicious (99/100) · Family: NmJfa4pdRVd

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.nmJfa4pdRVd
Kaspersky (KVRT): Worm.Win32.Wenper.b

MITRE ATT&CK

Why this verdict

The malicious score of 99/100 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
Dropped a malicious payload (Somhoveran): wlogon.dll - dynamic signal, weight 0.62, confidence 0.90
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 20 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
Observed at runtime: Modify Registry (T1112) (rule Modify Registry) - dynamic signal, weight 0.12, confidence 0.90

Dynamic analysis (windows)

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

Dropped files

C:\Windows\System32\wlogon.dll - 27718fc4cb5c98a37a399bfcb12c88efc805be9b15eb63f9ec94d0e72cfb5aaa
C:\Windows\System32\crypto.dll - 0fff2a783314434794883db4c23a0a623ced7f3acf3f1a411555717cde985222
C:\Windows\System32\net.cpl - 96c56e8dc64c9af666143e62fc9e83e3cfa58ea70b0feda07bbd6175b00e1a6b
C:\Windows\System32\lcss.exe - 28c908b2095db0f5f4d47d27e370fe3ad76752091b1bfd9a1a576e980445ee50

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=1787652725&P2=404&P3=2&P4=hJLTIy89zUf0OvdOCaDVDuQPwCxmWy98geZGfVMs7odb%2bbOgM%2bsJ%2biopryiiC8zVOlm7jZRLPVC5nVmKH6BTwg%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

20.184.175.11
57.155.104.224
4.230.171.124
4.144.132.223
74.179.77.204
20.42.73.30
74.178.240.51
20.112.250.133
52.123.128.14
40.104.4.2
20.42.73.26
135.233.95.144
203.26.79.13
92.223.78.30
172.178.240.163
135.233.95.80
52.148.114.188
72.145.35.112
52.110.12.42
52.110.12.2

File paths

W:\~c

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report