MALICIOUS — efbf45ee799ecd39758d545cd87e4a680f6a68473308f8bddf68c82281d2765a

MALICIOUS — efbf45ee799ecd39758d545cd87e4a680f6a68473308f8bddf68c82281d2765a is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (100/100), attributed to the Juko family. 4 of 56 detection engines flagged it, exhibiting 6 ATT&CK techniques.

Identification

SHA-256: efbf45ee799ecd39758d545cd87e4a680f6a68473308f8bddf68c82281d2765a
SHA-1: f60cf9168dee463577d1d348a654c62ba0447944
MD5: 9ffeb63e8ba954d3bf367b3a8c813b17
imphash: 170193414cc4abf0ae27dc2a19d74879
ssdeep: 768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpp:OLsF2Kerc64sTiX2IV0Dhup
TLSH: T1B12F396647309602F391A68B55403F4DB0B6A8EE3136C7518EE2B67E8BE045738B847C
Submitted as: efbf45ee799ecd39758d545cd87e4a680f6a68473308f8bddf68c82281d2765a
File type: pe · Size: 32784 bytes
Verdict: malicious (100/100) · Family: Juko

Detections (4 of 56 engines)

ClamAV (daily): Win.Malware.Juko-9753236-0
Microsoft Defender: Trojan:Win32/SelfDel!pz
Emsisoft (Emergency Kit): Trojan.Downloader.JUKO
Kaspersky (KVRT): HEUR:Trojan.Win32.SelfDel.gen

MITRE ATT&CK

Why this verdict

The malicious score of 100/100 is the fusion of 13 weighted signals:

ClamAV (daily) flagged Win.Malware.Juko-9753236-0 (rule Win.Malware.Juko-9753236-0) - engine signal, weight 0.90, confidence 0.95
2 behavioral detection(s) across 2 rule(s): Registry Run Key Persistence [high] (rule tl-run-key) - dynamic signal, weight 0.63, confidence 0.90
Microsoft Defender flagged Trojan:Win32/SelfDel!pz (rule Trojan:Win32/SelfDel!pz) - engine signal, weight 0.55, confidence 0.85
Emsisoft (Emergency Kit) flagged Trojan.Downloader.JUKO (rule Trojan.Downloader.JUKO) - engine signal, weight 0.55, confidence 0.85
Kaspersky (KVRT) flagged HEUR:Trojan.Win32.SelfDel.gen (rule HEUR:Trojan.Win32.SelfDel.gen) - engine signal, weight 0.55, confidence 0.85
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 1 external host(s) and 18 HTTP request(s) at runtime - network signal, weight 0.40, confidence 0.80
Anti-analysis: T1497.001, T1497, T1082, T1622 - dynamic signal, weight 0.40, confidence 0.75
communicate over HTTP (rule communicate over HTTP) - capa signal, weight 0.30, confidence 0.60
enumerate processes (rule enumerate processes) - capa signal, weight 0.20, confidence 0.60
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

Dynamic analysis (windows)

15710 behavior events · 3 ATT&CK techniques · 1 dropped files.

Dropped files

C:\Users\analyst\AppData\Roaming\Mozilla\WINWORD.exe - 8da180ba0f1631c8376fdc1d261eec30503402cf9c4158c718a01588a5ae9349

Embedded URLs

http://www.msftconnecttest.com/connecttest.txt
http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
http://rb.symcb.com/rb.crl
http://i.assmio.com/34FD36AA8E8581BB00001348F51CDFCD.aspx
http://i.assmio.com/355D56AC8E85839400001AD6CF2B9E20.shtm
http://i.assmio.com/35BAA6A88E85858500002248852FED5E.aspx
http://i.assmio.com/35DCE6AC8E858631000025070A34D682.002Q
http://i.assmio.com/754016A88E2F635E000029F1C0140B46.html
http://i.assmio.com/7551E6AC8E2F63EE00002C6BC1150729.aspx

Embedded domains

i.assmio.com

Embedded IP addresses

4.150.223.102
52.123.252.234
4.230.171.124
4.247.188.224
135.232.92.97
135.233.95.144
20.3.1.41
172.64.154.167
52.168.117.171
74.178.76.128
92.223.78.30
20.42.179.204
172.233.212.90
135.233.45.223
72.145.35.99
52.148.114.188
52.110.12.45
52.110.12.21

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

Analyzed on MalwareAnalyzer by Cyble · Open interactive report