MALICIOUS — 3C4.tmp
MALICIOUS — 3C4.tmp is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the Bskd family. 4 of 52 detection engines flagged it, exhibiting 3 ATT&CK techniques.
Identification
- SHA-256:
a5c87efc884445ce36ba4e8c76f327c31895ddf38dc3810410815874995594fb - SHA-1:
27c7da7f30779b8c4b7b314ed6c7a0e1a5565a23 - MD5:
2526d0dad40b2a3b16868e9f3651ef22 - imphash:
56176109b52a452352dd6749c77c0578 - ssdeep:
49152:ib93yn0HYjVscFKVUDlTsJOMmeGp4PzTF/vq:o4yFBjGqPvZq - TLSH:
T1095912DE2606A600D1E181C069241B2D1843F4EDB67D2DC5818FF26E37E696378A53EF - Submitted as: 3C4.tmp
- File type: pe · Size: 1855488 bytes
- Verdict: malicious (99/100) · Family: Bskd
Detections (4 of 52 engines)
- ClamAV (daily): Win.Malware.Bskd-9753126-0
- YARA: Yara-Rules community: YR_AntiDebug_Checks
- Microsoft Defender: Trojan:Win32/Remcos.AUT!MTB
- Kaspersky (KVRT): HEUR:Backdoor.Win32.Generic
MITRE ATT&CK
Why this verdict
The malicious score of 99/100 is the fusion of 7 weighted signals:
- ClamAV (daily) flagged Win.Malware.Bskd-9753126-0 (rule
Win.Malware.Bskd-9753126-0) - engine signal, weight 0.90, confidence 0.95 - Dropped a malicious payload (Bskd): CE0E.tmp - 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 19 external host(s) at runtime (6 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 - Observed at runtime: Modify Registry (T1112) (rule
Modify Registry) - dynamic signal, weight 0.12, confidence 0.90
Dynamic analysis (windows)
142 behavior events · 2 ATT&CK techniques · 1 dropped files.
Runtime network
- www.msftconnecttest.com
- rb.symcd.com
- rb.symcb.com
- searchapp.bundleassets.example
- ctldl.windowsupdate.com
- login.live.com
- ocsp.digicert.com
- desktop-hsgcbep
- v20.events.data.microsoft.com
- config.edge.skype.com
- windows.msn.com
- settings-win.data.microsoft.com
- officeclient.microsoft.com
- www.bing.com
- tas02.sls.update.microsoft.com
- msedge.api.cdp.microsoft.com
- v10.events.data.microsoft.com
- to-do.microsoft.com
- crl3.digicert.com
- watson.events.data.microsoft.com
Dropped files
- C:\Users\analyst\AppData\Local\Temp\CE0E.tmp -
178e11b7e63b64ac125cece257b2c8644a1f533dcb37e978db964a02112ce43b
Embedded URLs
- http://schemas.microsoft.com/SMI/2005/WindowsSettings
- http://www.msftconnecttest.com/connecttest.txt
- http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
- http://rb.symcb.com/rb.crl
Embedded domains
- schemas.microsoft.com
Embedded IP addresses
- 52.123.128.14
- 52.123.129.14
- 20.184.175.4
- 52.123.252.233
- 4.247.188.233
- 52.110.12.44
- 57.154.63.210
- 20.165.94.46
- 52.168.117.175
- 20.112.250.133
- 135.234.160.245
- 52.110.12.21
- 20.42.179.204
- 135.232.92.97
- 135.233.95.144
- 20.231.239.246
- 72.145.35.101
- 52.168.117.168
- 52.110.12.22
File paths
- T:\:d:l:t:
More Bskd samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report