MALICIOUS — virussign.com_7554a8c1ca9419005f49a15153fdba50.vir
MALICIOUS — virussign.com_7554a8c1ca9419005f49a15153fdba50.vir is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (100/100), attributed to the Guap family. 6 of 55 detection engines flagged it, exhibiting 5 ATT&CK techniques.
Identification
- SHA-256:
835aa24c151928e87675d275d1a22bae3632d816fbfb899d8b99f9c965652b70 - SHA-1:
375b206feed01870ac98b8789e6b8d431b1d37d3 - MD5:
7554a8c1ca9419005f49a15153fdba50 - imphash:
b6230692891661869cecd581561a21f4 - ssdeep:
12288:zW6n3sX4yCFr2ZemYOpSPIsGWeKZl4q7sioXE:zW6ncoyqOp6IsTl/mXE - TLSH:
T1AE4CBED87AC7CD54E8E97B86E44554BDD68BD12F582D2E8F0392C2386F812F3A472112 - Submitted as: virussign.com_7554a8c1ca9419005f49a15153fdba50.vir
- File type: pe · Size: 534713 bytes
- Verdict: malicious (100/100) · Family: Guap
Source: VirusSign · first seen 2026-08-19T00:00:00.000Z · SHA-256 verified
Detections (6 of 55 engines)
- ClamAV (daily): Win.Worm.Guap-4
- YARA: delivr.to detections: DLV_Maldoc_VBA_AutoExec
- YARA: MalwareAnalyser community pack: TL_Windows_Persistence_RunKey
- Microsoft Defender: Trojan:Win32/Fsysna!pz
- Emsisoft (Emergency Kit): Gen:Heur.Spesr.VB.1
- Kaspersky (KVRT): Trojan.Win32.Fsysna.gevi
MITRE ATT&CK
Why this verdict
The malicious score of 100/100 is the fusion of 13 weighted signals:
- ClamAV (daily) flagged Win.Worm.Guap-4 (rule
Win.Worm.Guap-4) - engine signal, weight 0.90, confidence 0.95 - 1 behavioral detection(s): Registry Run Key Persistence [high] (rule
tl-run-key) - dynamic signal, weight 0.60, confidence 0.90 - Observed at runtime: Registry Run Key Persistence (T1547.001) (rule
Registry Run Key Persistence) - dynamic signal, weight 0.40, confidence 0.90 - Observed at runtime: Windows Service (T1543.003) (rule
Windows Service) - dynamic signal, weight 0.40, confidence 0.90 - Contacted 27 external host(s) at runtime (23 HTTP) - network signal, weight 0.40, confidence 0.80
- Anti-analysis: T1497.001 - dynamic signal, weight 0.40, confidence 0.75
- Extracted BlackShades config (0 C2) - engine signal, weight 0.45, confidence 0.60
- YARA: delivr.to detections flagged DLV_Maldoc_VBA_AutoExec (rule
DLV_Maldoc_VBA_AutoExec) - engine signal, weight 0.35, confidence 0.70 - YARA: MalwareAnalyser community pack flagged TL_Windows_Persistence_RunKey (rule
TL_Windows_Persistence_RunKey) - engine signal, weight 0.35, confidence 0.70 - persist via registry run key (rule
persist via registry run key) - capa signal, weight 0.35, confidence 0.60 - communicate over HTTP (rule
communicate over HTTP) - capa signal, weight 0.30, confidence 0.60 - Dropped 15 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)
64218 behavior events · 3 ATT&CK techniques · 24 dropped files.
Runtime network
- www.msftconnecttest.com
- rb.symcd.com
- rb.symcb.com
- inference.location.live.net
- to-do.office.com
- staging.to-do.officeppe.com
- teams.cloud.microsoft
- outlook.office.com
- outlook.office365.com
- outlook.cloud.microsoft
- ctldl.windowsupdate.com
- login.live.com
- ocsp.digicert.com
- desktop-hsgcbep
- config.edge.skype.com
- v20.events.data.microsoft.com
- windows.msn.com
- oneocsp.microsoft.com
- www.msn.com
- officeclient.microsoft.com
Dropped files
- C:\Users\analyst\AppData\Local\Temp\CLVIPYABOTLTHSI\service.txt -
b464ead22d2bb9f8fa469522911b5ee8effeeeb2826f60de672099176b194927 - C:\Users\analyst\AppData\Local\TempWIIVC.bat -
2804afbea208be628fbefacac89f2b8b98e8fe2028b2efa17d0212fc183bbe15 - C:\Users\analyst\AppData\Local\TempNJVUY.bat -
e37ff80a267082a8d58cf329b64a776c516140a8da0a778b2cde737272f32ae7 - C:\Users\analyst\AppData\Local\Temp\WDVGSRSCYAHQGME\service.exe -
b3463f139bc2a152806560a5c42c013e147e6b2a11d5d16b071aed213c046aee - C:\Users\analyst\AppData\Local\Temp\RUJDCJSINFWNBMC\service.exe -
a5d29e938efa917c5178a8257cfd8a3c3b637f4b8503dcaddd7c45d66ee983cb - C:\Users\analyst\AppData\Local\TempSDXWL.bat -
959145979f9e67d897b59b3bd0bbc8acdb3a07c213616ac8da4b7045acaf3c8d - C:\Users\analyst\AppData\Local\Temp\GPHDSWIJGOAHMCN\service.exe -
93d6861163c81e715902ba7651b4d98569aff7a22a28d7b2b203ef5394bc5952 - C:\Users\analyst\AppData\Local\TempLTHII.bat -
6f02d5f2b60c769e262392bdadbacd6d16ef5f61b85dc22d858d7d7802380a06 - C:\Users\analyst\AppData\Local\TempFFEBI.bat -
d4e928b667ad896360dc98e17b584bdae29eb43b1a40159e9a909b268c2d0631 - C:\Users\analyst\AppData\Local\Temp\SUKECJTVJQKPMAM\service.exe -
171c0804fc06e5e1c821487356faf5676f18c96471214b6d94568e4cb85c824e - C:\Users\analyst\AppData\Local\TempBVXCS.bat -
8fd4bb9bb0dd42df5f2358c7206038fe68a0c7d90cac7977127020297b9e61b0 - C:\Users\analyst\AppData\Local\Temp\HDRXQGQKIKXAYFT\service.exe -
826826b1894cdf046a01c90fb3d69eece2ab58af8a258bc70cbacd1353836dc2 - C:\Users\analyst\AppData\Local\TempOESIT.bat -
5bdf1dc58e4d6a23c5f0bfa2c0e93eed745d463f10b2084a9145a27bd768860d - C:\Users\analyst\AppData\Local\TempXOPMU.bat -
e8ed7effd45bb5b65c1ae6450be4b7ffb28df2ca7ab9bb0a4fa08db8d4d26a4c - C:\Users\analyst\AppData\Local\Temp\KNDVTCWLBHQHTBP\service.exe -
77d13012a1fa10d3951711438fbb82c0a3cb3cc64a6a1a2d3c3f743a565fa467
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=1787782558&P2=404&P3=2&P4=nELQoYLVgLPlrm2qWBgsFkfVwzZzAUf7wirGZMGJvjHYkUp16e2Hf7YQUMK5UU6lT9srtYCA8KKVgXX9xkkjFw%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=1787782665&P2=404&P3=2&P4=Ci8Yx2JDV1CkImAPCnw2JvSXliwf%2fNlILF16ok0Oe5JaWL2rZ6BZI8LuNReSprITGt18FohvhDdZca6sD19LLg%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded domains
- server.com
- tsymantec.com
- tsecurityresponse.symantec.com
- tsarc.com
- twww.sarc.com
- twww.sophos.com
- tsophos.com
- twww.mcafee.com
- tmcafee.com
- tliveupdate.symantecliveupdate.com
- twww.viruslist.com
- tviruslist.com
- tf-secure.com
- twww.f-secure.com
- tf-prot.com
- twww.f-prot.com
- tkaspersky.com
- tkaspersky-labs.com
- twww.avp.com
- tavp.com
- twww.kaspersky.com
- twww.networkassociates.com
- tnetworkassociates.com
- twww.ca.com
- tca.com
Embedded IP addresses
- 52.123.252.222
- 4.150.223.107
- 4.144.132.114
- 4.230.171.124
- 20.42.179.204
- 74.178.240.61
- 74.179.77.164
- 20.231.239.246
- 40.99.134.18
- 52.123.129.14
- 52.168.117.168
- 203.26.79.13
- 135.234.160.245
- 172.66.2.5
- 172.215.188.225
- 52.148.114.188
- 135.233.45.223
- 52.123.252.227
- 74.179.71.159
- 52.123.252.226
- 52.110.12.55
- 52.110.12.15
- 51.105.71.137
- 72.145.35.99
- 92.223.78.30
Registry keys
- HKCU\Software\Microsoft\Windows\CurrentVersion\Run
File paths
- C:\Program
- C:\WINDOWS\system32\drivers\etc\hosts
More Guap samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report