MALICIOUS — 375c7748f4b2c662eb1e1143978ec92bea2cb8b9c8dd9767a3cfe01f0f800b90

MALICIOUS — 375c7748f4b2c662eb1e1143978ec92bea2cb8b9c8dd9767a3cfe01f0f800b90 is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (98/100), attributed to the FlyAgent family. 11 of 55 detection engines flagged it, exhibiting 4 ATT&CK techniques.

Identification

• SHA-256: 375c7748f4b2c662eb1e1143978ec92bea2cb8b9c8dd9767a3cfe01f0f800b90
• SHA-1: a4eda21adfb8d8a568296fbc3085a3e781a0c345
• MD5: 46600649b5daf69d27c27a9e0e1e422b
• imphash: 7700dc8e87e8a6c0c69971842b4b7691
• ssdeep: 24576:zkEq6Xru36vHi3ubATxjr/AL9d81HuDL/Y7LmtYpD6BaVo2a3:lm3oy/68Vun/5sXo2a3
• TLSH: T1D954AEDB3B0BA847DD343A960D11567DC032BBB346BA1DE5B6A6E32463D28034D33991
• Submitted as: 375c7748f4b2c662eb1e1143978ec92bea2cb8b9c8dd9767a3cfe01f0f800b90
• File type: pe · Size: 1176872 bytes
• Verdict: malicious (98/100) · Family: FlyAgent

Detections (11 of 55 engines)

• capa (capabilities): capability:collection/keylog
• MalwareAnalyser heuristics (entropy/packer): high-entropy-sections:.text
• ClamAV (daily): Win.Malware.FlyAgent-9850229-1
• YARA: delivr.to detections: DLV_Maldoc_VBA_AutoExec
• YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
• YARA: Stratosphere IPS: STRATO_Malicious_UserAgent
• YARA: MalwareAnalyser community pack: TL_Windows_Persistence_RunKey
• Microsoft Defender: Trojan:Win32/FlyAgent!pz
• Emsisoft (Emergency Kit): GenPack:Generic.Dacic.4803.19E0780E
• Trellix Stinger (McAfee): Flyagent.d
• Kaspersky (KVRT): UDS:Trojan.Win32.Agent

MITRE ATT&CK

• T1547.001
• T1071.001
• T1057
• T1056.001

Why this verdict

The malicious score of 98/100 is the fusion of 11 weighted signals:

• ClamAV (daily) flagged Win.Malware.FlyAgent-9850229-1 (rule Win.Malware.FlyAgent-9850229-1) - engine signal, weight 0.90, confidence 0.95
• capture keystrokes (rule capture keystrokes) - capa signal, weight 0.40, confidence 0.80
• YARA: delivr.to detections flagged DLV_Maldoc_VBA_AutoExec (rule DLV_Maldoc_VBA_AutoExec) - engine signal, weight 0.35, confidence 0.70
• YARA: JPCERT/CC flagged JPCERT_HUILoader_PlugX_SideLoad (rule JPCERT_HUILoader_PlugX_SideLoad) - engine signal, weight 0.35, confidence 0.70
• YARA: Stratosphere IPS flagged STRATO_Malicious_UserAgent (rule STRATO_Malicious_UserAgent) - engine signal, weight 0.35, confidence 0.70
• YARA: MalwareAnalyser community pack flagged TL_Windows_Persistence_RunKey (rule TL_Windows_Persistence_RunKey) - engine signal, weight 0.35, confidence 0.70
• persist via registry run key (rule persist via registry run key) - capa signal, weight 0.35, confidence 0.60
• Embedded network infrastructure: http://sf.symcb.com/sf.crl0a, https://d.symcb.com/rpa0, http://sf.symcb.com/sf.crt0 - static signal, weight 0.35, confidence 0.60
• communicate over HTTP (rule communicate over HTTP) - capa signal, weight 0.30, confidence 0.60
• Packing/obfuscation: high-entropy-sections:.text - static signal, weight 0.25, confidence 0.55
• enumerate processes (rule enumerate processes) - capa signal, weight 0.20, confidence 0.60

Dynamic analysis

No runtime behaviour was captured for this sample, so the analysis above is static only. That is a limit of this run rather than evidence the sample does nothing.

Embedded URLs

• http://crl.thawte.com/ThawteTimestampingCA.crl0
• http://ts-aia.ws.symantec.com/tss-ca-g2.cer0
• http://ts-crl.ws.symantec.com/tss-ca-g2.crl0
• https://www.verisign.com/rpa
• http://sf.symcb.com/sf.crl0a
• https://d.symcb.com/rpa0
• http://sf.symcb.com/sf.crt0
• https://www.verisign.com/cps0*
• https://www.verisign.com/rpa0
• http://logo.verisign.com/vslogo.gif04
• http://crl.verisign.com/pca3-g5.crl04
• http://sv.symcb.com/sv.crl0a
• http://sv.symcb.com/sv.crt0
• http://www.symauth.com/cps0
• http://www.symauth.com/rpa00
• http://s1.symcb.com/pca3-g5.crl0
• http://www.eyuyan.com

Embedded domains

• proc.name
• crl.thawte.com
• ts-aia.ws.symantec.com
• ts-crl.ws.symantec.com
• www.verisign.com
• sf.symcb.com
• d.symcb.com
• logo.verisign.com
• crl.verisign.com
• sv.symcb.com
• www.symauth.com
• s1.symcb.com
• www.eyuyan.com

Registry keys

• HKLM\SYSTEM\CurrentControlSet\Control\Terminal

File paths

• C:\ProgramData\Microsoft\Windows\Start
• C:\Documents
• c:\windows\system32\termsrv.dll
• C:\WINDOWS\system32\termsrv.dll
• C:\WINDOWS\system32\Termsrvs.dll

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report