MALICIOUS — 385ce9b56f607e1e50a0f03a8d1213ef99e28ca1422d473fc944f53d240b3518

MALICIOUS — 385ce9b56f607e1e50a0f03a8d1213ef99e28ca1422d473fc944f53d240b3518 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (100/100), attributed to the Prepscram family. 6 of 56 detection engines flagged it, exhibiting 3 ATT&CK techniques.

Identification

• SHA-256: 385ce9b56f607e1e50a0f03a8d1213ef99e28ca1422d473fc944f53d240b3518
• SHA-1: 905048a44be686bfb19f77c149b00733e988c68b
• MD5: d03708429a80d55882b97b2715134dcc
• imphash: f1a539a5b71ad53ac586f053145f08ec
• ssdeep: 768:eyX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIoIR+kJK0R5zmuvwqskG:egKcR4mjD9r82hSuW
• TLSH: T10E31E1707427A349EB30BC14309DA6EE95531C4B09D91AD75AF0C808FAA143BD6FBE58
• Submitted as: 385ce9b56f607e1e50a0f03a8d1213ef99e28ca1422d473fc944f53d240b3518
• File type: pe · Size: 42341 bytes
• Verdict: malicious (100/100) · Family: Prepscram

Detections (6 of 56 engines)

• MalwareAnalyser heuristics (entropy/packer): UPX
• ClamAV (daily): Win.Malware.Zusy-9957983-0
• Detect It Easy (packer/type): DIE:UPX
• Microsoft Defender: Trojan:Win32/Prepscram!pz
• Emsisoft (Emergency Kit): Gen:Variant.Rootkit.25
• Kaspersky (KVRT): Trojan.Win32.Agent.neyndy

MITRE ATT&CK

• T1547.001
• T1112
• T1105

Why this verdict

The malicious score of 100/100 is the fusion of 12 weighted signals:

• ClamAV (daily) flagged Win.Malware.Zusy-9957983-0 (rule Win.Malware.Zusy-9957983-0) - engine signal, weight 0.90, confidence 0.95
• Dropped a malicious payload (Prepscram): CTS.exe - dynamic signal, weight 0.62, confidence 0.90
• Microsoft Defender flagged Trojan:Win32/Prepscram!pz (rule Trojan:Win32/Prepscram!pz) - engine signal, weight 0.55, confidence 0.85
• Emsisoft (Emergency Kit) flagged Gen:Variant.Rootkit.25 (rule Gen:Variant.Rootkit.25) - engine signal, weight 0.55, confidence 0.85
• Kaspersky (KVRT) flagged Trojan.Win32.Agent.neyndy (rule Trojan.Win32.Agent.neyndy) - 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
• Contacted 18 external host(s) and 9 HTTP request(s) at runtime - network signal, weight 0.40, confidence 0.80
• Detect It Easy (packer/type) flagged DIE:UPX (rule DIE:UPX) - engine signal, weight 0.35, confidence 0.70
• MalwareAnalyser heuristics (entropy/packer) flagged UPX (rule UPX) - engine signal, weight 0.35, confidence 0.70
• Packing/obfuscation: UPX, high-entropy-sections:UPX1 - static signal, weight 0.25, confidence 0.55
• Observed at runtime: Modify Registry (T1112) (rule Modify Registry) - dynamic signal, weight 0.12, confidence 0.90
• Memory forensics: 5 finding(s) elsewhere in the guest, not attributed to this sample, e.g. process hidden from a listing (rule windows.psxview.PsXView) - memory signal, weight 0.05, confidence 0.30

Dynamic analysis (windows)

18902 behavior events · 2 ATT&CK techniques · 21 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• inference.location.live.net
• 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.
• 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.
• nexusrules.officeapps.live.com
• 6.110.171.150.in-addr.arpa.
• v20.events.data.microsoft.com
• 109.223.150.4.in-addr.arpa.
• v10.events.data.microsoft.com
• 104.223.150.4.in-addr.arpa.
• c.pki.goog
• x1.c.lencr.org
• x2.c.lencr.org
• ye.c.lencr.org
• ctldl.windowsupdate.com
• yr.c.lencr.org
• 54.133.221.23.in-addr.arpa.

Dropped files

• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDrive.Sync.Service.exe - ef74fb89bf7b2a0320812807e38ad6b52a1e4dd921bc1b11b007919d0c686284
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\FileSyncHelper.exe - 0560b84bbca4423b8695a43227cd07bbf99718b7539ebfc911f15ba3a4ceeb8f
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\Microsoft.SharePoint.NativeMessagingClient.exe - 9364cd2cb7f4f1c9816715fe35a85d380c4b92ebc930856a0e8b4b3056c5a978
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\Microsoft.SharePoint.NativeMessagingClient.exe - a42855e305f274b82272d3a737742f2520d2157ab8f038baae25a196e54978f1
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDrivePatcher.exe - 36ae2717e006c8b9ff8e5041f001760fb4beb329c9fcecb2131865445b003bfc
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDriveLauncher.exe - 88ef689c207999da0d4ce349f928fe9dbe5d0e9dc3b83b82898e800a31283cfd
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\OneDrive.exe - dad68cce2a50f2711bfdb131fede2c5f2806710ca180e0f608042e0e4183a4f4
• C:\Windows\CTS.exe - b612d46644d0e4a3829c4d6715f71d979103aa487624805363b36f5b4f92b118
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\FileSyncConfig.exe - 59942fc32b495e9b6b1dcc8ea1bf7e4cf315591575acd5f8ee0998d6d5c38127
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDriveFileLauncher.exe - abb9fb9b9a3d91ad342f9e9ef73fa39a70abe0c3c2140022e3f3ae1d3e6b0ad8
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\FileCoAuth.exe - c8d358de46cd2aaa9e4b6562f6a155d73e6be40953cd6453a38486b10efb29a1
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDriveUpdaterService.exe - 307e9c342ad141803e036d0b307923d077a09359b40c562b6f65c5c622dc8350
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\OneDriveStandaloneUpdater.exe - 65332745d718a5664ea64a380cebb76bd7e780237fb707aeca5ade1d3420843c
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\OneDrive.App.exe - cc142f1e9db5e8f8e44e5ce27fb2e48b73eed863348671da5f755f22a5f0c733
• C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\FileSyncHelper.exe - 7e7facc88b6ab3e9e1ec2c82b45356741ea85a7aba889fb10de1cfa89a10356c

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
• ..localmachine

Embedded IP addresses

• 203.26.79.13
• 4.150.223.104
• 4.150.223.109
• 40.79.167.9
• 4.150.223.97
• 72.145.35.97
• 85.210.196.11
• 52.148.114.188
• 72.154.7.104
• 20.42.73.25
• 57.154.63.210
• 20.42.65.89
• 40.84.97.4
• 172.172.255.217
• 51.11.192.49
• 20.42.73.31
• 51.105.71.136
• 20.42.65.90
• 52.168.112.67
• 172.215.188.232
• 52.110.12.45
• 52.253.84.76
• 4.230.171.124
• 57.155.101.212

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report