MALICIOUS — wlogon.dll

MALICIOUS — wlogon.dll is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the OmJfa4pdRVd family. 6 of 55 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

SHA-256: 62c3f52bd5a42c3592ad70711b28cad7e186e74c1b55908970f7db5f7fe6d5b7
SHA-1: 2c17723e3c8993f939d322dca7f55ea2482201e3
MD5: 2f437caaf976ea46ae05e6a7397424e5
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 3072:IyrN/sVywaEj1Us10nfbyrN/sVywaEj1UsYh9LtwR1cblnxR4Izu4A+F51MMRdky:Nh9wv1Uveh9wv1UC+j4IzugHMMPkCIA
TLSH: T11443231B9AA0E47EC2D779E5A834675EECCC1F1C80156A90BF403669813DBD7B9046CC
Submitted as: wlogon.dll
File type: pe · Size: 230400 bytes
Verdict: malicious (99/100) · Family: OmJfa4pdRVd

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.omJfa4pdRVd
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): crypto.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 23 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)

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

Dropped files

C:\Windows\System32\crypto.dll - 8e48a6e095057dae555b62217d23e1c48f0275e3178f7ab589feb7dfd9fe6a0b
C:\Windows\System32\wlogon.dll - b74c63061d1a2c650b2e0a95cd847f181ab743d6001167ba67dddd55847ffade
C:\Windows\System32\lcss.exe - 7147e6c9348ecd60997c2c7cb985fd2d973c41c5129cc01d19bb1478ee44d965
C:\Windows\System32\net.cpl - 0de0440285ed5d6b59db13684082b958fef4dcda4bd72f7c6ba001185c2bf3e9

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=1787649596&P2=404&P3=2&P4=TXayvIoezbs7X1UhXgurV2b5Kq%2blduzHZ%2bi4F1pYEdMHO5PXcp4vjeyFUZGGFoC9pdMZOYwBQ5j5BNhCnbCp1Q%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

74.179.71.159
4.150.223.98
4.247.188.233
4.230.171.124
20.247.184.142
74.178.76.128
4.150.223.101
74.178.240.51
52.123.129.14
20.76.201.171
40.99.133.226
40.99.134.18
203.26.79.13
172.178.240.162
172.178.240.161
52.110.12.48
52.110.12.16
74.178.76.44
52.148.114.188
72.145.35.111
172.66.2.5
52.110.12.18
52.110.12.5

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report