MALICIOUS — wlogon.dll

MALICIOUS — wlogon.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: afe5033335b125c0f1dae66bd5ea740b1ad13d2f4df232b332c6575a7d408af2
SHA-1: 784b22feb185c6a1b8ce83ca0d409c57ccbf3d78
MD5: 5fa46cd1b0151c10de4642ac83d5d750
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 6144:Nh9wv1Ut3nh9wv1U493bhIjPNiHsUcgj0+iVi5pxOg:Nh9wtah9wtNCxmcr+iip5
TLSH: T10843120B62519C7DC5F3AE6B7D68E52FE8066F5C082664842C077F77902E34762C8AC9
Submitted as: wlogon.dll
File type: pe · Size: 228352 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.nmJfa4pdRVd
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 19 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)

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

Dropped files

C:\Windows\System32\crypto.dll - 63efd83e9b51bc7d41291dbf0f4dd7078b5ba8f52b74214a3cdfdcc38743b42b
C:\Windows\System32\wlogon.dll - c8e5c086aef17891c50037d4dd01fa84c8ff0433b3ed0dac0b880714523f924a
C:\Windows\System32\net.cpl - b200a9f415ef7d1c02923e621eee2e6741ec57e5126da73df9890f5c43318951
C:\Windows\System32\lcss.exe - 82f4b09b59567c1c26e57498ec561eccc89a5a2928b679ae9062c49f158726c3

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=1787685194&P2=404&P3=2&P4=GrXVtGlkyYcZ4m5%2bYZ9KJ0VOH9bfaHwgwo8K34YjdAmuHM1V9O0wPgsDu0KRZ7ee%2bi4v9pb1sO8pGiQQmp9ykQ%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=1787685211&P2=404&P3=2&P4=a%2b42WAf9g1BUPEjr25Z11zv9kDclJO%2bGnCZCVBeWYBeMCNUvWgyjJ%2fguK1lkK%2fjH8FWweSFlIRQECHUNcK35IQ%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

20.42.73.25
20.247.185.124
172.215.188.232
4.230.171.124
74.178.232.29
74.178.240.61
74.178.240.51
20.50.80.215
203.26.79.13
20.231.239.246
52.123.129.14
40.103.64.226
162.159.142.9
135.233.45.221
172.66.2.5
52.148.114.188
72.145.35.99
52.110.12.50
52.110.12.28

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report