MALICIOUS — 684ef008a5ff1c348de51412fa8662ffac145f25d58dc45aa336c5c8c6a20b5a

MALICIOUS — 684ef008a5ff1c348de51412fa8662ffac145f25d58dc45aa336c5c8c6a20b5a 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 4 ATT&CK techniques.

Identification

SHA-256: 684ef008a5ff1c348de51412fa8662ffac145f25d58dc45aa336c5c8c6a20b5a
SHA-1: 2ff9832a5c02bb2ef89ef38c73cfb8062600ca94
MD5: 39dd0e93c93acdc1980cdb384e1f326c
imphash: f1a539a5b71ad53ac586f053145f08ec
ssdeep: 768:eyX3LKew369lp2z3Sd4baFXLjwP/Tgj93b8NIo9ip34nLsYHsgEiyRMRFMgv:egKcR4mjD9r82uckLsZiyRdq
TLSH: T19E32E1746837934CD321F91CA0CAB5ED70235DCB188E4D5F1AB0490BA8650A787E6B15
Submitted as: 684ef008a5ff1c348de51412fa8662ffac145f25d58dc45aa336c5c8c6a20b5a
File type: pe · Size: 44136 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.Virus.8
Kaspersky (KVRT): Trojan.Win32.Agent.neyndy

MITRE ATT&CK

Why this verdict

The malicious score of 100/100 is the fusion of 15 weighted signals:

ClamAV (daily) flagged Win.Malware.Zusy-9957983-0 (rule Win.Malware.Zusy-9957983-0) - 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
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.Virus.8 (rule Gen:Variant.Virus.8) - 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
Observed at runtime: Windows Service (T1543.003) (rule Windows Service) - dynamic signal, weight 0.40, confidence 0.90
Contacted 2 external host(s) and 21 HTTP request(s) at runtime - network signal, weight 0.40, confidence 0.80
Anti-analysis: T1082 - dynamic signal, weight 0.40, confidence 0.75
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: 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)

7195 behavior events · 3 ATT&CK techniques · 32 dropped files.

Dropped files

C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\FileSyncConfig.exe - adc5436b1b324b7f0053e9412d7a37446ebf2cce4d5064b9b936cafbe0819f56
C:\Users\analyst\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\8EDCF682921FE94F4A02A43CD1A28E6B - 4770dc8005ef5a574cb6f1f0f80a96769230a4ac1bc154def2cb77dadec881f2
C:\Users\analyst\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8EDCF682921FE94F4A02A43CD1A28E6B - 3c98e610f6a57d2a13510e9d7a114720f0fd9639fcb9ee6b9aaf43bdf43e4260
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDriveUpdaterService.exe - 42e7b6498a00d127819054069d672854186a853b0e0eed1de6f27686fc990ccb
C:\Users\analyst\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8E4E510F44A56B8C8ECFEC352907C373_411140098D71F028134E9B8A21255C61 - fae343bcebc78521b76e14147d285e2782380470fa2bf5e71254d4826afeae86
C:\Users\analyst\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CD9C747F40EEA288D73938D33144F716 - a3712066e2c1a7dd980a454a1c56f23dcabb18f69de1fe8a17cfb56ba48f0d0b
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\Microsoft.SharePoint.NativeMessagingClient.exe - c65018177d15a0a5b21d48bd9f397826cc2d19d7b6bd85f35a57be42411ae873
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\Microsoft.SharePoint.NativeMessagingClient.exe - 1e3d7191ea77d7819005c7aea93972e6663f15640a6bf7d562dab9d42d6e00d7
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\FileSyncConfig.exe - 837755d4002629b4779cdbf1700b42c57ffc7c3b948bd6769e32e4ac798ddaeb
C:\Windows\CTS.exe - b612d46644d0e4a3829c4d6715f71d979103aa487624805363b36f5b4f92b118
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\FileSyncHelper.exe - 4796c4b4e225fa5601ab893f0efeaded70415ebbfaa5f3675f69b5d1b54aedd9
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\OneDriveStandaloneUpdater.exe - 9285988e0d2008678a456f9a582a8248b6fde0d885d753b5d7d201a2ad5f5c98
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.139.0720.0007\FileSyncHelper.exe - a84e3573d5e4cf09db2682e461e8b1c252568ff18a621199e0a9a7cd43d8acdc
C:\Users\analyst\AppData\Local\Microsoft\OneDrive\26.123.0628.0001\OneDriveFileLauncher.exe - cd038fcf2f3ae2706b123b0c4b372b2ee76b25b6e9476e5a5b07c52f794928e0
C:\Users\analyst\AppData\Local\Temp\BkMSpRPrFOqgMc3.exe - 13c921999e5ff273007a610a8521bbc77d884b41d9cbbd41e045b3497909659c

Embedded URLs

http://www.msftconnecttest.com/connecttest.txt
http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
http://rb.symcb.com/rb.crl
http://th.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBRsif7263KedmR2MLuYKv9%2BWQCtWAQU1A1lP3q9NMb%2BR%2BdMDcC98t4Vq3ECEBT4%2FdFn%2BSQCsVcLXcSVyBU%3D
http://th.symcb.com/th.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

20.42.73.28
52.253.84.76
4.230.171.124
52.110.12.30
52.110.12.42
20.42.179.204
4.150.223.98
13.89.179.15
57.155.104.224
72.145.35.104
92.223.78.30
52.110.12.18
52.110.12.45
52.148.114.188

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

Analyzed on MalwareAnalyzer by Cyble · Open interactive report