MALICIOUS — virussign.com_44a822f16cc0fd83dc09015813cf7d50.vir
MALICIOUS — virussign.com_44a822f16cc0fd83dc09015813cf7d50.vir is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (74/100), attributed to the Zusy family. 3 of 55 detection engines flagged it, exhibiting 1 ATT&CK technique.
Identification
- SHA-256:
a2354efc32affa56330a4f3e703954b56fa9d7ccb1096a106cd6d4c80b6b7d80 - SHA-1:
f19bc9aee4d26029a0f076a5e194112e5495ef53 - MD5:
44a822f16cc0fd83dc09015813cf7d50 - imphash:
542863a264e826bf130b0880664f67e4 - ssdeep:
98304:o7GpL4IFkDS1foMqv4Yop7IyoB+QBPDE7uO:o7GpZ31foMqtB+QBPDE7 - TLSH:
T1956A6C7071656487CFFA1630BCAE456E37B360202AB6D38C1386215391D26FF8A7C5E6 - Submitted as: virussign.com_44a822f16cc0fd83dc09015813cf7d50.vir
- File type: pe · Size: 9807973 bytes
- Verdict: malicious (74/100) · Family: Zusy
Source: VirusSign · first seen 2026-08-17T00:00:00.000Z · SHA-256 verified
Detections (3 of 55 engines)
- YARA: Yara-Rules community: YR_AntiDebug_Checks
- Microsoft Defender: Trojan:Win32/Zusy.KK!MTB
- Kaspersky (KVRT): HEUR:Trojan.Win32.Agent.pef
MITRE ATT&CK
Why this verdict
The malicious score of 74/100 is the fusion of 4 weighted signals:
- Dropped a suspicious payload (AntiDebug): mutated_27542.exe - dynamic signal, weight 0.40, confidence 0.90
- Contacted 28 external host(s) at runtime (21 HTTP) - network signal, weight 0.40, confidence 0.80
- YARA: Yara-Rules community flagged YR_AntiDebug_Checks (rule
YR_AntiDebug_Checks) - engine signal, weight 0.35, confidence 0.70 - Embedded network infrastructure: https://gcc.gnu.org/bugs/ - static signal, weight 0.35, confidence 0.60
Dynamic analysis (windows)
901 behavior events · 0 ATT&CK techniques · 25 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
- licensing.mp.microsoft.com
- windows.msn.com
- officeclient.microsoft.com
- oneocsp.microsoft.com
Dropped files
- C:\Users\analyst\AppData\Local\Temp\mutated_27542.exe -
38c3511634727a13be85845a49fe25d9181f752b362244926c3604a2208edb0d - C:\Users\analyst\AppData\Local\Temp\mutated_18614.exe -
006770f03c77f2533ab3a4d3e4082980f852344801dce145e7905f6ae3326580 - C:\Users\analyst\AppData\Local\Temp\mutated_19124.exe -
a036aadd672f8e7e816a046856c509ba902d3f0133b019102206e066906874ee - C:\Users\analyst\AppData\Local\Temp\mutated_31098.exe -
df7ed0221749244faded8aaf680019c7339aa4fc244a59158d556ab7de8690b0 - C:\Users\analyst\AppData\Local\Temp\mutated_18512.exe -
92bc733d3994d77a467577aa879873395fc152821b3f3a331932773dae305415 - C:\Users\analyst\AppData\Local\Temp\mutated_9631.exe -
ba5d7d66f5753bc7c83ef98e9089fa34857d0466e790b0fb4420f0d947f2a367 - C:\Users\analyst\AppData\Local\Temp\mutated_9085.exe -
c75f959b5a9b1ef49ab20ab89d328aad99863ff72ac9d22ae244dbe5c7a734e9 - C:\Users\analyst\AppData\Local\Temp\mutated_28545.exe -
e8da67922acb48af79689a0f65f5eef3caa6629a2d76282340497527a99ae138 - C:\Users\analyst\AppData\Local\Temp\mutated_16285.exe -
7f616540564b845a7d335e696de440fc10d41356075fca9d48ecffd142164719 - C:\Users\analyst\AppData\Local\Temp\mutated_9733.exe -
3a796f68ad559ea6c93aded802a5288f2b8d00ef366896af2bc1c96b7eb962ce - C:\Users\analyst\AppData\Local\Temp\mutated_2431.exe -
bd69f4855840fba869be887567adb8853432323b04b5f956510018d5ae213b64 - C:\Users\analyst\AppData\Local\Temp\mutated_6533.exe -
02dbe1c6ef7b8ef2c1602951516e48ebda26e71e574746f7871c0cef30136ba7 - C:\Users\analyst\AppData\Local\Temp\mutated_30094.exe -
55e35d8765a87d2d4764d34d9fa3191f2b8c3dbdf1231f3ab80c3949eb44c014 - C:\Users\analyst\AppData\Local\Temp\mutated_17288.exe -
1eaa628dc0d6fc4c96b986936609226e3e484745b4bcae16293fb3eca4cd22a0 - C:\Users\analyst\AppData\Local\Temp\mutated_28353.exe -
242076624beb79a3b0f47b20f3c42048acc5299108b422a14eb580ad98254567
Embedded URLs
- https://gcc.gnu.org/bugs/
- 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=1787642782&P2=404&P3=2&P4=XO9XmNEI3J0tz4Ez9yk3GJiAjoT3JB5tHHhfw0JL%2brGOpeLXxnhEj5bh%2fH5btlGkwu4cChDqdukba2YH1NcKag%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice//files/45cd9142-6feb-4946-89e7-63e58fada30a/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/45cd9142-6feb-4946-89e7-63e58fada30a?P1=1787642860&P2=404&P3=2&P4=LhojfvVZag66MfZEhdVjIjojb2oj1rcwZC6S4dEI2p3db%2bc%2bn4Y15NjK%2bXxtbQC4r4riDhM%2ftaPZkXrK7EtcXw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded domains
- gcc.gnu.org
Embedded IP addresses
- 52.110.12.20
- 172.217.25.195
- 92.223.78.30
- 20.184.175.2
- 52.123.252.240
- 20.247.184.197
- 172.215.188.232
- 4.230.171.124
- 135.232.92.137
- 20.184.175.12
- 20.165.94.54
- 13.69.116.107
- 20.165.94.46
- 20.112.250.133
- 40.99.134.2
- 52.123.128.14
- 51.11.192.49
- 135.233.45.221
- 20.165.94.63
- 203.26.79.13
- 52.148.114.188
- 52.123.252.193
- 135.232.92.34
- 72.145.35.96
- 52.110.12.51
File paths
- X:\:`:d:h:l:p:t:x:
- X:\:h:l:p:
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Analyzed on MalwareAnalyzer by Cyble · Open interactive report