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UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2)

UPSTYLE is a Python-based backdoor associated with exploitation of Palo Alto firewalls using CVE-2024-3400 in early 2024. UPSTYLE has only been observed in relation to this exploitation activity, which involved attempted install on compromised devices by the threat actor UTA0218.(Citation: Volexity UPSTYLE 2024)(Citation: Palo Alto MidnightEclipse APR 2024)

Cluster A Galaxy A Cluster B Galaxy B Level
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware Process Discovery - T1057 (8f4a33ec-8b1f-4b80-a2f6-642b2e479580) Attack Pattern 1
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware Masquerading - T1036 (42e8de7b-37b2-4258-905a-6897815e58e0) Attack Pattern 1
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware Junk Data - T1001.001 (f7c0689c-4dbd-489b-81be-7cb7c7079ade) Attack Pattern 1
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware Clear Linux or Mac System Logs - T1070.002 (2bce5b30-7014-4a5d-ade7-12913fe6ac36) Attack Pattern 1
One-Way Communication - T1102.003 (9c99724c-a483-4d60-ad9d-7f004e42e8e8) Attack Pattern UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware 1
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware Timestomp - T1070.006 (47f2d673-ca62-47e9-929b-1b0be9657611) Attack Pattern 1
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware Event Triggered Execution - T1546 (b6301b64-ef57-4cce-bb0b-77026f14a8db) Attack Pattern 1
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware Deobfuscate/Decode Files or Information - T1140 (3ccef7ae-cb5e-48f6-8302-897105fbf55c) Attack Pattern 1
Python - T1059.006 (cc3502b5-30cc-4473-ad48-42d51a6ef6d1) Attack Pattern UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware 1
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware Encrypted/Encoded File - T1027.013 (0d91b3c0-5e50-47c3-949a-2a796f04d144) Attack Pattern 1
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware File Deletion - T1070.004 (d63a3fb8-9452-4e9d-a60a-54be68d5998c) Attack Pattern 1
UPSTYLE - S1164 (2692bdd0-da52-44ff-88a3-9db28b948ea2) Malware Hide Infrastructure - T1665 (eb897572-8979-4242-a089-56f294f4c91d) Attack Pattern 1
Data Obfuscation - T1001 (ad255bfe-a9e6-4b52-a258-8d3462abe842) Attack Pattern Junk Data - T1001.001 (f7c0689c-4dbd-489b-81be-7cb7c7079ade) Attack Pattern 2
Indicator Removal - T1070 (799ace7f-e227-4411-baa0-8868704f2a69) Attack Pattern Clear Linux or Mac System Logs - T1070.002 (2bce5b30-7014-4a5d-ade7-12913fe6ac36) Attack Pattern 2
One-Way Communication - T1102.003 (9c99724c-a483-4d60-ad9d-7f004e42e8e8) Attack Pattern Web Service - T1102 (830c9528-df21-472c-8c14-a036bf17d665) Attack Pattern 2
Indicator Removal - T1070 (799ace7f-e227-4411-baa0-8868704f2a69) Attack Pattern Timestomp - T1070.006 (47f2d673-ca62-47e9-929b-1b0be9657611) Attack Pattern 2
Command and Scripting Interpreter - T1059 (7385dfaf-6886-4229-9ecd-6fd678040830) Attack Pattern Python - T1059.006 (cc3502b5-30cc-4473-ad48-42d51a6ef6d1) Attack Pattern 2
Obfuscated Files or Information - T1027 (b3d682b6-98f2-4fb0-aa3b-b4df007ca70a) Attack Pattern Encrypted/Encoded File - T1027.013 (0d91b3c0-5e50-47c3-949a-2a796f04d144) Attack Pattern 2
Indicator Removal - T1070 (799ace7f-e227-4411-baa0-8868704f2a69) Attack Pattern File Deletion - T1070.004 (d63a3fb8-9452-4e9d-a60a-54be68d5998c) Attack Pattern 2