MALICIOUS — 3a2239e4295fd0a0567f73b84a4e6385f18c9859ad07b32316091b30279392b6

MALICIOUS — 3a2239e4295fd0a0567f73b84a4e6385f18c9859ad07b32316091b30279392b6 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 2 ATT&CK techniques.

Identification

SHA-256: 3a2239e4295fd0a0567f73b84a4e6385f18c9859ad07b32316091b30279392b6
SHA-1: 3c3ac9230d83453fdbd2f0dc4d4a23e76117f737
MD5: d6ddea1f406c34867d35f950fd6fcab3
imphash: f1a539a5b71ad53ac586f053145f08ec
ssdeep: 768:eyX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIowZjgbaWmlu/N6GLVKwqxQzsvCh:egKcR4mjD9r82XjgOWZRpsvwj
TLSH: T1543202317431E348E3F7F92D6086AA5EE1920C8A444416960EB0C51AECA057B8AF7F35
Submitted as: 3a2239e4295fd0a0567f73b84a4e6385f18c9859ad07b32316091b30279392b6
File type: pe · Size: 45804 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

Why this verdict

The malicious score of 100/100 is the fusion of 13 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
1 behavioral detection(s) across 1 rule(s): Registry Run Key Persistence [high] (rule tl-run-key) - dynamic signal, weight 0.60, 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
Memory forensics: 1 finding(s) attributed to the sample across 1 technique(s), e.g. process hidden from a listing (rule windows.psxview.PsXView) - memory 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 2 external host(s) and 17 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
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)

2450 behavior events · 1 ATT&CK techniques · 20 dropped files.

Dropped files

C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\FileCoAuth.exe - 597ec9d173cb3f846f75fec6dc65cf32177ec9430f38a35bf2bf6ba660d4430d
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\OneDrive.exe - 2ba8c46bea147e9ba45b024e30cad24b9cefc1f421d63a89b8886f9e6e0c5266
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\OneDrive.App.exe - 7cbcdbadf2ce65214354b6bf3becd7fa1f328fdbcab656a41c47ccdec68cc2e3
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDrivePatcher.exe - 6df871027e93398c4fba869a2ccf5e8d676b2aef6b019c143b4e2577ffde3e35
C:\Users\analyst\AppData\Local\Temp\bm8SFINzH6iM3Wr.exe - f0dd9d6a1c94dcd51acaa13cc0bd0b426d955ec013fa6cfc58e3c98afb912bc9
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\FileSyncHelper.exe - 6a76b951fb70b6d6f4504752d5c721748bfd80882003804bc7ddca4d19b48a25
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDriveActionHelper.exe - d067997ff2cd4cb67fbb2054cc745d46da2a7ac7ff3f0df8ca50ee6b55fffec2
C:\Windows\CTS.exe - b612d46644d0e4a3829c4d6715f71d979103aa487624805363b36f5b4f92b118
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\Microsoft.SharePoint.NativeMessagingClient.exe - 898023b7042843221d4545becbb81c9b3dc5ac969a73ef4bf8df865b92abf79f
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDriveFileLauncher.exe - a5e2f46f1aaaa225f9dde8567a12bbb6006bbdeaee2b970ffcf175bb81f125f9
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\FileSyncConfig.exe - 3907662077324f6a98e54d2a7250313ad64d93eda2f6e72747ba2a7071dc76a0
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\FileSyncConfig.exe - 7f2f0af2a093cc2e3d140c2061634ab1a2f562dadb22fcddba65271e66a06358
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDriveLauncher.exe - 080a1aa1d6dedd12981057e03cac7324ea6c5782a50293ba52684712e0aa052c
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDriveUpdaterService.exe - a1e9402c43051b73b6afce5e70def03a79d2edd3dbce534f30c791fdf2eddb08
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\OneDriveStandaloneUpdater.exe - c031a08688c42803c7141bdd6f3d87820d0856079664757575b351a66b0beac7

Embedded URLs

http://www.msftconnecttest.com/connecttest.txt
http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
http://rb.symcb.com/rb.crl
http://c.pki.goog/r/r1.crl
http://x2.c.lencr.org/
http://ye.c.lencr.org/
http://c.pki.goog/wr2/9UVbN0w5E6Y.crl
http://yr.c.lencr.org/

Embedded domains

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

Embedded IP addresses

20.184.175.17
52.253.84.76
172.215.188.232
20.247.184.197
4.230.171.124
20.184.175.18
20.42.73.27
172.215.188.225
184.84.165.136
52.110.12.2
52.110.12.51
52.148.114.188
72.154.7.105
52.110.12.26

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report