MALICIOUS — wlogon.dll

MALICIOUS — wlogon.dll is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (98/100), attributed to the HmJfa4pdRVd family. 6 of 55 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

SHA-256: 1217e948140db8c58ba0cd75cf0c2297d3e272062cdab62f25aa47e06cbeb5a8
SHA-1: baa18d4086f8acc0967ae97da570367445a8611f
MD5: 2982a6a24000e2d6c3285e3bdd116664
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1UsEOBYJwyrN/sVywaEj1UstoG49ky:Nh9wv1Ut3nh9wv1UfG49ky
TLSH: T1683C0107A512D0F9C2D3BE641C68D25DF8524F5849369EC06D026F9FA00EB2BA5E4F8D
Submitted as: wlogon.dll
File type: pe · Size: 117760 bytes
Verdict: malicious (98/100) · Family: HmJfa4pdRVd

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.hmJfa4pdRVd
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)

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

Dropped files

C:\Windows\System32\wlogon.dll - 38919ff275399adcab42658b1e3bce8cc7d50e76ce6a8752778a0c2c81c96476
C:\Windows\System32\crypto.dll - fc280b24761d36ca4fa985c9aa25efbcbd2cf87a418f2a283221f14551025485
C:\Windows\System32\lcss.exe - 002721a5eb59a311cc34c9776f4c4ef9c08197d054ab839deb336450f7c22079
C:\Windows\System32\net.cpl - 2fda3dc319f38ddf09bf6e05b473d39dc00860a1253669fda82edcb1a4a6fb70

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=1787665849&P2=404&P3=2&P4=BaXKOOYM6qVHxDn0w4Lvaj%2fRjfy4X8wbf87U1zHLmp1rj3ccORo%2bwDsTlD%2bxo%2fMX8eSCNJ6CXVFriRFjcaNW%2bw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

52.178.17.234
57.155.101.212
20.247.184.142
4.230.171.124
74.178.240.61
135.233.95.135
51.132.193.104
52.123.128.14
20.76.201.171
40.99.133.226
172.66.2.5
52.123.129.14
20.184.175.1
20.42.73.24
135.233.45.222
135.233.45.221
203.26.79.13
72.154.7.105
20.165.94.46
52.148.114.188
52.110.12.50
52.110.12.5

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report