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MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54)

MuddyViper is custom backdoor written in C and C++ used by MuddyWater for command and control (C2) communications and persistence. MuddyViper is loaded by Fooder and sends frequent messages to the C2 server.(Citation: ESET_MuddyWater_Dec2025)

Cluster A Galaxy A Cluster B Galaxy B Level
Security Software Discovery - T1518.001 (cba37adb-d6fb-4610-b069-dd04c0643384) Attack Pattern MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Process Discovery - T1057 (8f4a33ec-8b1f-4b80-a2f6-642b2e479580) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Command and Scripting Interpreter - T1059 (7385dfaf-6886-4229-9ecd-6fd678040830) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Delay Execution - T1678 (a1df809c-7d0e-459f-8fe5-25474bab770b) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Windows Command Shell - T1059.003 (d1fcf083-a721-4223-aedf-bf8960798d62) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Web Protocols - T1071.001 (df8b2a25-8bdf-4856-953c-a04372b1c161) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Scheduled Task - T1053.005 (005a06c6-14bf-4118-afa0-ebcd8aebb0c9) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware GUI Input Capture - T1056.002 (a2029942-0a85-4947-b23c-ca434698171d) Attack Pattern 1
Archive Collected Data - T1560 (53ac20cd-aca3-406e-9aa0-9fc7fdc60a5a) Attack Pattern MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware 1
Exfiltration Over C2 Channel - T1041 (92d7da27-2d91-488e-a00c-059dc162766d) Attack Pattern MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Ingress Tool Transfer - T1105 (e6919abc-99f9-4c6c-95a5-14761e7b2add) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware PowerShell - T1059.001 (970a3432-3237-47ad-bcca-7d8cbb217736) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Registry Run Keys / Startup Folder - T1547.001 (9efb1ea7-c37b-4595-9640-b7680cd84279) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Symmetric Cryptography - T1573.001 (24bfaeba-cb0d-4525-b3dc-507c77ecec41) Attack Pattern 1
Modify Registry - T1112 (57340c81-c025-4189-8fa0-fc7ede51bae4) Attack Pattern MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Native API - T1106 (391d824f-0ef1-47a0-b0ee-c59a75e27670) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Reflective Code Loading - T1620 (4933e63b-9b77-476e-ab29-761bc5b7d15a) Attack Pattern 1
MuddyViper - S9032 (7b92e996-b535-4159-be16-3c3aee4edf54) Malware Deobfuscate/Decode Files or Information - T1140 (3ccef7ae-cb5e-48f6-8302-897105fbf55c) Attack Pattern 1
Security Software Discovery - T1518.001 (cba37adb-d6fb-4610-b069-dd04c0643384) Attack Pattern Software Discovery - T1518 (e3b6daca-e963-4a69-aee6-ed4fd653ad58) Attack Pattern 2
Command and Scripting Interpreter - T1059 (7385dfaf-6886-4229-9ecd-6fd678040830) Attack Pattern Windows Command Shell - T1059.003 (d1fcf083-a721-4223-aedf-bf8960798d62) Attack Pattern 2
Application Layer Protocol - T1071 (355be19c-ffc9-46d5-8d50-d6a036c675b6) Attack Pattern Web Protocols - T1071.001 (df8b2a25-8bdf-4856-953c-a04372b1c161) Attack Pattern 2
Scheduled Task/Job - T1053 (35dd844a-b219-4e2b-a6bb-efa9a75995a9) Attack Pattern Scheduled Task - T1053.005 (005a06c6-14bf-4118-afa0-ebcd8aebb0c9) Attack Pattern 2
Input Capture - T1056 (bb5a00de-e086-4859-a231-fa793f6797e2) Attack Pattern GUI Input Capture - T1056.002 (a2029942-0a85-4947-b23c-ca434698171d) Attack Pattern 2
PowerShell - T1059.001 (970a3432-3237-47ad-bcca-7d8cbb217736) Attack Pattern Command and Scripting Interpreter - T1059 (7385dfaf-6886-4229-9ecd-6fd678040830) Attack Pattern 2
Boot or Logon Autostart Execution - T1547 (1ecb2399-e8ba-4f6b-8ba7-5c27d49405cf) Attack Pattern Registry Run Keys / Startup Folder - T1547.001 (9efb1ea7-c37b-4595-9640-b7680cd84279) Attack Pattern 2
Encrypted Channel - T1573 (b8902400-e6c5-4ba2-95aa-2d35b442b118) Attack Pattern Symmetric Cryptography - T1573.001 (24bfaeba-cb0d-4525-b3dc-507c77ecec41) Attack Pattern 2