MALICIOUS — virussign.com_cb645cd42115412532f39c4f0b435d90.vir

MALICIOUS — virussign.com_cb645cd42115412532f39c4f0b435d90.vir 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: 29342a94153db96d186d77a173b7dfa703f55a69f1c92c7f75938d06138eda32
SHA-1: 0445a98c3a83a36c364704312f98f89e1a03afaf
MD5: cb645cd42115412532f39c4f0b435d90
imphash: e60d0e6577962a1096407913ed128742
ssdeep: 6144:Nh9wv1U7h9wv1UvmBFuAx0aCiWEeGhoOmYt:Nh9wtMh9wt4CF3xQJNIms
TLSH: T1DE421206A586C0F8C5E2BD9C6898E76C54540F2C09265CC06D133B7BA12DB2BD5F8BCD
Submitted as: virussign.com_cb645cd42115412532f39c4f0b435d90.vir
File type: pe · Size: 217600 bytes
Verdict: malicious (99/100) · Family: NmJfa4pdRVd

Source: VirusSign · first seen 2026-08-17T00:00:00.000Z · SHA-256 verified

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): lcss.exe - 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)

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

Dropped files

C:\Windows\System32\lcss.exe - 6a7914d29edac2dd6c008ba48a175fa47fe0cf148dd62dbccb83b34ac315949d
C:\Windows\System32\wlogon.dll - 341c1edbb9a4a8b81e2d4a7b612a709f3598786f877fd6578fb6312b39ae152e
C:\Windows\System32\crypto.dll - b435457bfcb9f093508d4b9bc7cef971af72c5856889a118851fcf0c363195d9
C:\Windows\System32\net.cpl - 3d6fc38f7fa42a15a4b433f682f7ab38ef8a282b34c96d7c5823478fccc1daf6

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=1787643629&P2=404&P3=2&P4=fzgcfFjOguy7ZWHGGwAtsQoEqGhFeBrMIqILx71yuhIAStG9eHkPqMJAfLWHp2FgRRumLFoSTFOfgTmPoP%2fC3Q%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com

Embedded IP addresses

4.209.250.170
4.150.223.114
20.247.184.142
4.247.188.224
4.230.171.124
74.179.77.204
20.184.175.4
74.178.76.54
20.42.65.91
20.76.201.171
52.123.129.14
52.123.128.14
135.234.160.245
52.123.252.195
203.26.79.13
72.145.35.100
52.148.114.188
52.110.12.28
52.110.12.5
20.165.94.46

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report