MALICIOUS — virussign.com_640a64d7fd1d77dcd2f141e10840f240.vir

MALICIOUS — virussign.com_640a64d7fd1d77dcd2f141e10840f240.vir is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the Flystudio family. 7 of 52 detection engines flagged it, exhibiting 4 ATT&CK techniques.

Identification

• SHA-256: 9e62570dde3f729ba5f1d019fc2e390247b958e242b6f1bc8f12ccba26629fe3
• SHA-1: df732d70e051daed6c6dabedef764bd8a2a6747e
• MD5: 640a64d7fd1d77dcd2f141e10840f240
• imphash: 7f6bcbaac68ba94037bacbc1b3f44934
• ssdeep: 49152:MtHESw3Nk+GgolG4oigUpEJp4FvsdH0jDge7vL7yEq2/UsDoqwVY/fC:qmhGgolG4oigUiDQvsdygefJ/jDonsC
• TLSH: T1BE5EBF722115EB11F3D0EBD8961E8A2C9133094A28BE1FD8DE53D06C33D8DA7791A476
• Submitted as: virussign.com_640a64d7fd1d77dcd2f141e10840f240.vir
• File type: pe · Size: 2945024 bytes
• Verdict: malicious (99/100) · Family: Flystudio

Detections (7 of 52 engines)

• YARA: MalwareAnalyser built-in: Windows_Injection_Api_Combo
• capa (capabilities): capability:collection/keylog
• ClamAV (daily): Win.Malware.Flystudio-10032218-0
• YARA: delivr.to detections: DLV_Maldoc_VBA_AutoExec
• YARA: JPCERT/CC: JPCERT_Emotet
• YARA: Stratosphere IPS: STRATO_Malicious_UserAgent
• YARA: MalwareAnalyser community pack: TL_Shellcode_VirtualAlloc_Exec

MITRE ATT&CK

• T1055
• T1071.001
• T1057
• T1056.001

YARA

• Windows_Injection_Api_Combo

Why this verdict

The malicious score of 99/100 is the fusion of 11 weighted signals:

• ClamAV (daily) flagged Win.Malware.Flystudio-10032218-0 (rule Win.Malware.Flystudio-10032218-0) - engine signal, weight 0.90, confidence 0.95
• Process injection API combination (rule Windows_Injection_Api_Combo) - yara signal, weight 0.65, confidence 0.90
• 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_Emotet (rule JPCERT_Emotet) - 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_Shellcode_VirtualAlloc_Exec (rule TL_Shellcode_VirtualAlloc_Exec) - engine signal, weight 0.35, confidence 0.70
• Embedded network infrastructure: http://127.0.0.1:18081/items, http://127.0.0.1:18081/item_discard?item_system_id=, http://127.0.0.1:18081/role - static signal, weight 0.35, confidence 0.60
• 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
• inject code into another process (rule inject code into another process) - capa signal, weight 0.12, confidence 0.60

Dynamic analysis (windows)

0 behavior events · 0 ATT&CK techniques · 0 dropped files.

Runtime network

• none

Embedded URLs

• http://127.0.0.1:18081/items
• http://127.0.0.1:18081/item_discard?item_system_id=
• http://127.0.0.1:18081/role
• http://127.0.0.1:18081/send_packet?hex=
• http://127.0.0.1:18081/achievement_claim?achievement_id=
• http://127.0.0.1:18081/achievements
• http://127.0.0.1:18081/item_use?item_system_id=
• http://127.0.0.1:18081/pets
• http://127.0.0.1:18081/cards
• http://127.0.0.1:18081/map_teleport?area_id=
• http://127.0.0.1:18081/nearby
• http://127.0.0.1:18081/automove?x=
• http://127.0.0.1:18081/skills
• http://www.baidu.com/
• https://l2m-prod-api.pple.qq.com/trade/v1.0/me/sales?game_server_id=
• http://127.0.0.1:18081/jwt
• https://l2m-prod-api.pple.qq.com/trade/v1.0/sales/valid/pages
• http://127.0.0.1:18081/trade_sell?item_system_id=
• http://127.0.0.1:18081/auto_battle?enable=
• http://127.0.0.1:18082/launch?game_id=2002433
• http://127.0.0.1:18081/sys_shop
• http://127.0.0.1:18081/tasks
• http://127.0.0.1:18081/task_execute?id=
• http://127.0.0.1:18081/task_accept?id=
• http://127.0.0.1:18081/task_teleport?id=

Embedded domains

• api.freeyun.net
• bgp.freeyun.net
• www.baidu.com
• l2m-prod-api.pple.qq.com
• 5.fr
• update-1301522541.cos.ap-shanghai.myqcloud.com
• www.eyuyan.com

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report