MALICIOUS — 31f3c8b78bc19d3660a58ed3b04fd18eb110009071576144de563bd09d50740e

MALICIOUS — 31f3c8b78bc19d3660a58ed3b04fd18eb110009071576144de563bd09d50740e is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (92/100), attributed to the Agentb family. 3 of 56 detection engines flagged it, exhibiting 2 ATT&CK techniques.

Identification

• SHA-256: 31f3c8b78bc19d3660a58ed3b04fd18eb110009071576144de563bd09d50740e
• SHA-1: 58972adbf3e0297e33f881a5a30e5b361c01ebf5
• MD5: 7a4676fe38fe363b37dc519e540f5519
• imphash: 802dcac7aab948c19738ba3df9f356d9
• ssdeep: 384:yQ3bXykJBqhz9QhtGSdYDTFS9XHSbOiQ3bXykJBqhz9QhtGSdYDT/S9XHSbO:ytrJ9Qhtn2aSOitrJ9Qhtn2ISO
• TLSH: T1712FB76705A19D5BF617D6FB5480DF0D28F2E4F899B701D81E82DC0DA67CC5328A920E
• Submitted as: 31f3c8b78bc19d3660a58ed3b04fd18eb110009071576144de563bd09d50740e
• File type: pe · Size: 32768 bytes
• Verdict: malicious (92/100) · Family: Agentb

Detections (3 of 56 engines)

• Microsoft Defender: Trojan:Win32/Zexa.WE!MTB
• Emsisoft (Emergency Kit): Trojan.Agent.EYLR
• Kaspersky (KVRT): Trojan.Win32.Agentb.knto

MITRE ATT&CK

• T1112
• T1105

Why this verdict

The malicious score of 92/100 is the fusion of 7 weighted signals:

• Microsoft Defender flagged Trojan:Win32/Zexa.WE!MTB (rule Trojan:Win32/Zexa.WE!MTB) - engine signal, weight 0.55, confidence 0.85
• Emsisoft (Emergency Kit) flagged Trojan.Agent.EYLR (rule Trojan.Agent.EYLR) - engine signal, weight 0.55, confidence 0.85
• Kaspersky (KVRT) flagged Trojan.Win32.Agentb.knto (rule Trojan.Win32.Agentb.knto) - engine signal, weight 0.55, confidence 0.85
• Contacted 28 external host(s) and 11 HTTP request(s) at runtime - network signal, weight 0.40, confidence 0.80
• Dropped 1 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
• Memory forensics: 2 finding(s) elsewhere in the guest, not attributed to this sample, e.g. SSDT hook (rule windows.ssdt.SSDT) - memory signal, weight 0.05, confidence 0.30

Dynamic analysis (windows)

2492 behavior events · 1 ATT&CK techniques · 1 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• inference.location.live.net
• 3.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa.
• 252.0.0.224.in-addr.arpa.
• desktop-hsgcbep._dosvc._tcp.local
• desktop-hsgcbep(1)._dosvc._tcp.local
• desktop-hsgcbep(2)._dosvc._tcp.local
• ecs.office.com
• desktop-hsgcbep
• update.googleapis.com
• login.live.com
• ctldl.windowsupdate.com
• self.events.data.microsoft.com
• settings-win.data.microsoft.com
• 251.0.0.224.in-addr.arpa
• b.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 1.0.240.10.in-addr.arpa
• 3.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa

Dropped files

• C:\Users\analyst\AppData\Local\Temp\WFXKDWIIWB.exe - cacb0d9446e188745631cfb2e8712bd180643a6a07304384defe38c7397aea81

Embedded URLs

• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl

Embedded domains

• x1.c.lencr.org
• x2.c.lencr.org
• ye.c.lencr.org
• yr.c.lencr.org

Embedded IP addresses

• 52.123.128.14
• 172.215.188.225
• 20.52.64.201
• 135.233.95.144
• 20.184.175.7
• 104.46.162.229
• 40.79.163.154
• 85.210.196.11
• 52.123.129.14
• 40.84.97.4
• 20.42.65.84
• 52.168.117.174
• 52.123.252.236
• 72.145.35.97
• 52.148.114.188
• 4.247.188.224
• 51.11.192.50
• 72.145.35.110
• 4.247.188.233
• 135.234.160.246
• 40.84.85.40
• 48.211.4.16
• 172.172.255.218
• 4.207.44.75
• 20.50.80.215

File paths

• C:\Users\

More Agentb samples · Latest analyzed threats · ATT&CK coverage

Analyzed on MalwareAnalyzer by Cyble · Open interactive report