MALICIOUS — virussign.com_c4a0b02c083ec8fc10313701005ddde0.vir
MALICIOUS — virussign.com_c4a0b02c083ec8fc10313701005ddde0.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:
00757ce8a37d8606b5872f47c96d4825abcf52cf5eb51d752216972020dbf906 - SHA-1:
9ba7a0ae233ed392cf5250532b33afd14ad6e8e9 - MD5:
c4a0b02c083ec8fc10313701005ddde0 - imphash:
b6230692891661869cecd581561a21f4 - ssdeep:
12288:zW6n3sX4yCFr2ZemYOpSPIsGWeKZl4q7sioXq:zW6ncoyqOp6IsTl/mXq - TLSH:
T1EA4CBEC87AC7DD54E8E97B86E45544BDD68BD12F186D2E8F0392C2386F812F3A871112 - Submitted as: virussign.com_c4a0b02c083ec8fc10313701005ddde0.vir
- File type: pe · Size: 532979 bytes
- Verdict: malicious (100/100) · Family: Guap
Source: VirusSign · first seen 2026-08-20T00:00:00.000Z · 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 24 external host(s) at runtime (21 HTTP) - network signal, weight 0.40, confidence 0.80
- Anti-analysis: T1497.001, T1082 - 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 16 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)
64741 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
- v20.events.data.microsoft.com
- config.edge.skype.com
- windows.msn.com
- oneocsp.microsoft.com
- msedge.api.cdp.microsoft.com
- www.msn.com
Dropped files
- C:\Users\analyst\AppData\Local\TempGEQNM.bat -
245523ca5cde5921c3ae3de341b92a8be87e85c0bfc710cce36e33029a1d6ff3 - C:\Users\analyst\AppData\Local\Temp\DVOFBQUGHENFKYA\service.exe -
72219a664bc89ab235807d40ecbe446ee024968aa33eb79638e6f5feffb35c0e - C:\Users\analyst\AppData\Local\Temp\PIXHPDDEYEAVPDK\service.exe -
bc1079c08adc8db16e4555ac2bfed8e2c2acc49a7ac438e6b50170aa9fb04065 - C:\Users\analyst\AppData\Local\TempIFOAM.bat -
8eb28ca3075fc9c03905118e25682a405b641d3ee61239e721e7e395d06fb735 - C:\Users\analyst\AppData\Local\TempLCUNP.bat -
25e78f97c6e0f3895e509fe058b72bc5cfb813f568f2ce18b5a083a20b7eb9e4 - C:\Users\analyst\AppData\Local\Temp\KDKWVWSQXSIVDMD\service.exe -
02c9e5dfbc3063259a32e6d871ea4c7aa1040e599abf954c0ae0dd3705758429 - C:\Users\analyst\AppData\Local\Temp\FYIUUVQOVRGUCKN\service.exe -
2f04a54af8a8b8f6e228b68e1c918026960153892061ec310dba751606ac80c3 - C:\Users\analyst\AppData\Local\Temp\BOKYWNXQPRDHMSR\service.exe -
bd360be0fd64670e36b83247969dd7496f201154ccbceccfb942ece9021ed485 - C:\Users\analyst\AppData\Local\Temp\ESORUTVHFUVTBCN\service.exe -
cd4b6552b1a9f935ac71065a76c437a1b3d659366bba5396a264427386b63f00 - C:\Users\analyst\AppData\Local\Temp\CKCTLHCWMNKTRCB\service.exe -
8bd4e0e6083627801ed4471f1947abc9674897b2ad9ddb7d2203e23462b1e982 - C:\Users\analyst\AppData\Local\TempFLSSD.bat -
cfcb315fc9dd4ed84840290d137eb81b099b21dfcf1c7aed9fed7f63beeb3ada - C:\Users\analyst\AppData\Local\Temp\VBUEQQRMKRNCQXH\service.exe -
24a533ef00f519320c3679bc412795c22657355c42616b47f4510e894ac4529f - C:\Users\analyst\AppData\Local\TempCERNM.bat -
6811e32bf46607f53a576155206361d6e7919d5f35d2429662b20204ea004fe0 - C:\Users\analyst\AppData\Local\TempBFVWT.bat -
ed6f753489be787df57b05c0c5f86b753f1f8dcd4ec13facbfd38c588c38b8d7 - C:\Users\analyst\AppData\Local\TempHRMAM.bat -
e950e9ab27e8bf1d8f71c788c8f626308bcc6aaf2efba941a1977e8712cb997e
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=1787849260&P2=404&P3=2&P4=ObOjg3HWja5jnaQEjvLF9LYqe0TtHCA9U7RnH1LCthR4fDkDmLGw0irIdCGJpeUxbIT%2fvTHoJ21d7s38gYXB4Q%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=1787849343&P2=404&P3=2&P4=IH33gikRSzYIlsn2Or2iXTEQN%2fUQtc8YUx9s9oBTuyEX8nx7iz0hYAzoW8wnWOJ0sZmo%2fhSALz3G1JWyN1vEXA%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
- 20.184.175.10
- 52.123.252.231
- 52.123.252.193
- 4.144.132.223
- 20.42.179.192
- 4.230.171.124
- 135.232.92.137
- 57.154.63.210
- 4.150.223.115
- 74.178.76.54
- 20.236.44.162
- 52.123.129.14
- 52.123.128.14
- 4.207.44.76
- 203.26.79.13
- 20.165.94.63
- 135.233.45.221
- 135.232.92.34
- 52.148.114.188
- 135.234.160.246
- 72.153.5.139
- 135.234.160.244
- 52.110.12.21
- 52.110.12.10
Registry keys
- HKCU\Software\Microsoft\Windows\CurrentVersion\Run
File paths
- C:\Program
- C:\WINDOWS\system32\drivers\etc\hosts
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Analyzed on MalwareAnalyzer by Cyble · Open interactive report