Analysis
- max time kernel
150s - max time network
135s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows - submitted
13/08/2026, 15:21
Behavioral task
behavioral1
Sample
894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.exe
Resource
win10v2004-20260513-en
11 signatures
150 seconds
General
- Target 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.exe
- Size 13.3MB
- Sample260813-srf39sstat
- SHA256 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40
- MD5 6ab51618c95d728682f370e327d26c10
- SHA1 1e030dadcb478f91799ddb42d59424cc198f9618
- SHA512 2c70014a744755122576f3249d145a58b7be1ad1442037da9b72160b9c9bac1fcdc42cb606366e5c5857dbfd5da1d8b4e0728a2f52bdd4b3f8f497258fd56f12
- SSDEEP 393216:XcW39K+VC/eAUhbnQH2fEJxfVKRII3kGH:nI+s/+hbw6ExNKRIqk2
- TLSH T195E6233FE28B743DE05A5A393976A110943B6E2168068C4797ECF89CCF795B01D3E687
- MD5 SHA1 SHA512 SSDEEP TLSH
Malware Config
Signatures
- Executes dropped EXE 2 IoCs
pid Process 4492 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp 2196 letsflutssh.exe - Loads dropped DLL 9 IoCs
pid Process 2196 letsflutssh.exe 2196 letsflutssh.exe 2196 letsflutssh.exe 2196 letsflutssh.exe 2196 letsflutssh.exe 2196 letsflutssh.exe 2196 letsflutssh.exe 2196 letsflutssh.exe 2196 letsflutssh.exe - Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.exe - Inno Setup is an open-source installation builder for Windows applications. 3 IoCs
Inno Setup installer
resource yara_rule behavioral2/memory/2400-1-0x00000000001D0000-0x00000000002B9000-memory.dmp innosetup behavioral2/memory/2400-8-0x00000000001D0000-0x00000000002B9000-memory.dmp innosetup behavioral2/memory/2400-93-0x00000000001D0000-0x00000000002B9000-memory.dmp innosetup - Modifies registry class 7 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1738198120-2966725515-3980530802-1000_Classes\letsflutssh\ = "URL:LetsFLUTssh Protocol" 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp Set value (str) \REGISTRY\USER\S-1-5-21-1738198120-2966725515-3980530802-1000_Classes\letsflutssh\URL Protocol 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp Key created \REGISTRY\USER\S-1-5-21-1738198120-2966725515-3980530802-1000_Classes\letsflutssh\shell\open\command 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp Key created \REGISTRY\USER\S-1-5-21-1738198120-2966725515-3980530802-1000_Classes\letsflutssh\shell 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp Key created \REGISTRY\USER\S-1-5-21-1738198120-2966725515-3980530802-1000_Classes\letsflutssh\shell\open 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp Set value (str) \REGISTRY\USER\S-1-5-21-1738198120-2966725515-3980530802-1000_Classes\letsflutssh\shell\open\command\ = "\"C:\\Users\\Admin\\AppData\\Local\\Programs\\LetsFLUTssh\\letsflutssh.exe\" \"%1\"" 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp Key created \REGISTRY\USER\S-1-5-21-1738198120-2966725515-3980530802-1000_Classes\letsflutssh 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp - Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4492 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp 4492 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp - Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 4492 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2196 letsflutssh.exe - Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 2400 wrote to memory of 4492 2400 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.exe 89 PID 4492 wrote to memory of 2196 4492 894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp 92
Processes
-
C:\Users\Admin\AppData\Local\Temp\894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.exe"C:\Users\Admin\AppData\Local\Temp\894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2400 -
C:\Users\Admin\AppData\Local\Temp\is-W3WNMJFS7O.tmp\894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp"C:\Users\Admin\AppData\Local\Temp\is-W3WNMJFS7O.tmp\894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp" /SL5="$301E2,12737262,893952,C:\Users\Admin\AppData\Local\Temp\894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:4492 -
C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\letsflutssh.exe"C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\letsflutssh.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
PID:2196
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\app_links_plugin.dll
- Size 136KB
- SHA256 462e4b4997e5e63bcae4f85bdfc6e10e9905c72c2bbb9df4f80a9020d4efa278
- MD5 acfcef6b8af0e79248de9911e91607e2
- SHA1 d5556c17928618d92f826247bca776778ae1125d
- SHA512 5e577afbbd4620141f786aabbaf00700287893bbfe3c4f019dedb7607e8de98637cc271940b05556b10c27ce9998c7fffd224195b377a4edcb42aec400566401
- SSDEEP 3072:mTZB3vnv6YEQa6lhiCKk02nhMpZdTdcCS9GTcmSEC:mTZB3Pv6YEQa6u2nhMpZdTdcClTcmSE
- TLSH T166D36D2BF71940A7E25AC07CCA534945EBB2B8910BA197CF17500B9B1F27BE85E7E311
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\data\app.so
- Size 11.5MB
- SHA256 62a599f928db008317eb150b4b1289d9e25e9a608f67166185c4e218288a25cf
- MD5 e235eafd2aea21eee1efdab2da273a9f
- SHA1 f0fc8a1bd8c5daf8078b8720f4150b0caa690bc1
- SHA512 6d4b5f6a265cf6831f2abc5d0391bc27e764f1fd2fa2a3202bfcaa06ba02b956e7ce892c479082d8be4c06300c44a1b3524638d00717ed87974e5a02cd6ee5b2
- SSDEEP 98304:p8mcvWg6cidg7h+/F+7IBUb+9DoM+sKzFXEC6ZL5NR7uq:+mxgWgs/F+7IBUyyM+rE/N9uq
- TLSH T199C6F957D0E85760E472E773B76F66A55D247CCC4E30B74A0B845A253E8BCE84ACE232
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\data\flutter_assets\FontManifest.json
- Size 227B
- SHA256 6860c5ad3b9a3b9e46e661149d18a558098b6e115189d0ca6ef38a1e69e9e190
- MD5 08cbe0cd818d4500355fbf0497b57aba
- SHA1 35d1368163ded2315c463cf912c15e4c352f4b7c
- SHA512 4986bf9195c0566b987e87617a7eb4332766f1ef09d87eb69edb5ea7e245b93b97a1524f7d74633d700d0bee57aa06329c2306a5612401694aaeb8c04f8cce92
- TLSH T1C8D05E1F442A0AF6608DA88AF0A7209274541A5B324EF85ED6721AB4A6FA2101338367
- MD5 SHA1 SHA512 TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\data\flutter_assets\NativeAssetsManifest.json
- Size 133B
- SHA256 81edc7faa6975fec4a647e9c82237ef9e0aaeaa66d37d5b4f785b383c25ed3a1
- MD5 6dbc2bc71f3e9b8e8bd3f33ed06ed60d
- SHA1 c0f33085a2e00fdf38fc4152750f43d3b351221d
- SHA512 4eceb5ce5c083324673b832151098f142856f66769b1360ecf4a6447a9d561acb29473877211c52aef7035b8ecb94572f3ca8f125ed182b27a473bbaff397837
- TLSH T195C02B96C2000B7134C91B06E8091AC0025D3260E8722CAC05E0410C1F0050EC1100A0
- MD5 SHA1 SHA512 TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\data\flutter_assets\assets\fonts\Inter.ttf
- Size 856KB
- SHA256 29160a80ff49ddcab2c97711247e08b1fab27a484a329ce8b813d820dc559031
- MD5 bff0f6e3b9e2259a28313168a907054f
- SHA1 97d4f3722d62c6cc5340bf6220ada3d64ca367b1
- SHA512 3b71d2ca0b0b7649d939f982fe5b973c913c4b0a89e1b07ea6b8b1fcf5f8c8f25b5cf293936f936b1e8b43831ea976bd82151cd0ad0d2847b254f6a3ac0b7f9c
- SSDEEP 24576:PY598csuuuPz2iKeRpz6iruEOwRy+4FFhex:PYv8cB2iKeRpz6iar9FU
- TLSH T136158D53F682CF5AC259273486B30B9962395871FF17030F596A33B8BE933E1694D6E0
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\data\flutter_assets\assets\fonts\JetBrainsMono.ttf
- Size 182KB
- SHA256 48715a42ec242c21e9f02692891e147d022299a52e48d5e413e1a942193ffeda
- MD5 4d05bb0e4a6903fc39fac52353f8e3d9
- SHA1 bef242b36d905170007caed53cd6a07775dbfb82
- SHA512 ab86200329c5226484c00dd79ac49b8994c91f75fa7c4ca146b30d4c9b9b2589af44a6d1a61040d14bb624ab7f16dd0f967dae15ce3b24e59158f794ee857f54
- SSDEEP 3072:MPAeM5+k8l01xgr6+eXl6OYHjH8NWIt5lEa2EvUGxFmbx6y:MPAeM5+k8q1xf+gs/HjHcfEalcoKx6y
- TLSH T16E04494AD35B9EA1C0231B7843A63F76A371A727779B2347180CAD259D873FC4C69287
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\data\flutter_assets\fonts\MaterialIcons-Regular.otf
- Size 1.6MB
- SHA256 d9865b671a09d683d13a863089d8825e0f61a37696ce5d7d448bc8023aa62453
- MD5 e7069dfd19b331be16bed984668fe080
- SHA1 fc25284ee3d0aaa75ec5fc8e4fd96926157ed8c4
- SHA512 27d9662a22c3e9fe66c261c45bf309e81be7a738ae5dc5b07ad90d207d9901785f3f11dc227c75ca683186b4553b0aa5a621f541c039475b0f032b7688aaa484
- SSDEEP 24576:PsSIRolMKvGXtkXKLkMp2fXrNsAxI6zD2/qxDoq4eeeDrG2eOeGr2lkzhlTMrRoV:P9njdzbwc9
- TLSH T1787529100276EF4CC1EF507D43B74A48F4C59AFEA53ABB1AF9B64795220BDBDA1C8181
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\data\icudtl.dat
- Size 842KB
- SHA256 998367809a821d595928089c197b3f7959f0420f81f79d4d0daee53378492ed5
- MD5 018361032ba13dfeab636138ab6b9831
- SHA1 8f9c259d3a330786ab8bbd49e7e79abfa1d552ed
- SHA512 d7d3fffb41576cf2c90cd260727cc0ea23c5a4c458f84b01426c2a4578004b94168047c7282222e9ffade2f082e189cf167146cc3303bd7dbbb252a593236967
- SSDEEP 12288:8Mlhw771h0jM7ykPG07rr4c8w0P4N48Rkjt3dPHz982VYhq:Zhw3zVtjLbGu4RjTPHzMhq
- TLSH T199056A17B0435E6FE0C48277C652E7B65637838DEB3317EAB698B5593E8A1C20241BCD
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\desktop_drop_plugin.dll
- Size 89KB
- SHA256 6b585a74bf5bd062d091d3d8fa8116288e04db3ad426f8c5aa7266d066bca30a
- MD5 b0d27c59f98578c5b2ddeeebc78d96fd
- SHA1 c11c5474ee3faf5f086e4f64c2691e011c97238e
- SHA512 d1cedbcabe88210893826d63a706d8327c727fb78b74fa065e1dd15d3ae30070e84c458a01e870611dea6291a6d8051cc2160f9c6153ef7a6e0a53ef9f3b82a6
- SSDEEP 1536:dEW7xlP7o6D3zx7HhRkQKZBTc2bbMEkHnmoZnvAPzvlpCiIAY:dEWTTo6JTh1l8bMJmIvAPzvlpCiM
- TLSH T180933A3BEA5D50ABE269C47CCA438911D772BC854791ABCF57900ADB0E67BE44F3E201
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\flutter_secure_storage_windows_plugin.dll
- Size 156KB
- SHA256 5c315ce38c2bcfb387ad4e2ce5fbf76a6098a106fbf2bd596bc02216c3233201
- MD5 0dcc996a57ab76249c8729a7fa24fc18
- SHA1 f801b2f3b7842948bf434760f4493264abf074ed
- SHA512 1977888efb11303d4adc3891d03c85f550ade453e80012f38b18dfb296405eb0601dff3c4a0f4cfcd89ab048b02bf960875a98e8505aa5fc4a27b3e2710b5337
- SSDEEP 3072:sMP4x3HBzqTbtJ0KXx0M57x2UoD6q4mWi4qgFeDTSDMAWrd4Nb0s:3P4ZHBW1J0KXeM57xq6q76DMAm4Nb0s
- TLSH T169F33C27B759007AD266C1BCCA934A46E7737C85076197CF07914ABA0F27BE86F3E211
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\flutter_windows.dll
- Size 19.8MB
- SHA256 c0304beba5fe98477177e151c673adad98d0442f50efa25d03ff5f207cc21056
- MD5 d58a8db7631d3577b3cc9abe14cce466
- SHA1 c42e1571ddb6191789331f3db60783cc8a539b78
- SHA512 89bdff0faa6ea9f3d89a8bde8e381f82996931f22fc695d1c26e28fac59eff9428ca8e65461373337035233fc4e732c8643b2460290af5393d63e643e626955e
- SSDEEP 98304:QPe71P0UiyfxPUBJt4D5hrwgRk244TtFkJp7KYx8m3aIw3v8sDM0p1Vw3/tJjkad:Q+CYrwgRPLYFUZw3vjRfIS5XQe8I
- TLSH T1C9276B03F29640EDC459E178971BAA23F671B8490720BADF27584B223F66FE05B3E754
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\letsflutssh.exe
- Size 134KB
- SHA256 047e51485d32a95abd6b02b13c20e2b95234ff79f4c740cde8842d9c34fb1128
- MD5 8d45c3e81d2cc728027065e1726ce594
- SHA1 ac4421320ccc7930a4d404130a9816f316f56d10
- SHA512 482c7be8417b152a108007915be5414840bf62758da1a93867f1693ac49798b331622fc7c5ae77e534f728126e0fd2583fe6c4fccce876b1233749f125831f16
- SSDEEP 3072:uBW2uJYHM6Bb3x3pOWyz3zHSxHT51piQ/cUMNXWgOtQVUCBo:uBW2KYHM69x3pOWyz3TSxYQ/cUIfqco
- TLSH T1D2D3BF67DE1591EBD35A8C78CD535502CE72BC864BA1A6CB5B400EE70E52BE0AF7D202
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\local_auth_windows_plugin.dll
- Size 173KB
- SHA256 cf2e6fd84c5b264681d99544cbea5a90f10a178581e68dde2b6cd3ac28b3f9a7
- MD5 d8e69a11d14bb8220649381026128154
- SHA1 e14fe7fc2d666e51d9a5757751e3e823c5071906
- SHA512 0f35f545aff55538a5bae0be7ecff763ce38b846ed83a9ece43939ed6515384380c42be9f23b7996428564f6bdd3732744d248e36dda668f68171c5203bc190b
- SSDEEP 3072:aPaVBRmBn2ZVwa27ZaB16uW2+zh/0sZueeMfN5kuxNd82UN:ayVBRmBn1w16u0eMfN5kuxNd82u
- TLSH T140045A5BB7AD4093E17AD13CCD438909E772B4A51BA097CB27504BBB1E27BD89E3D240
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Programs\LetsFLUTssh\url_launcher_windows_plugin.dll
- Size 96KB
- SHA256 692a481619c1542b737c75f6710ee8f3c8849d9f559aaf304b4d180d1225396d
- MD5 5d610348098fc4a6304f54776887a956
- SHA1 4028ceea906d270271fcc0dbde781ba30e5bb370
- SHA512 382fd0f8b5852bd6c3dbab85c4863ab4f54816f58c51e01d4b18a9ba64faa9f14128276acf54ef73bf0a24d0682ad2bfea134bbdb47deb64677045258cb3c4f4
- SSDEEP 1536:HGpZRNr942MEIxKj2a66rzCiVB2/N9LBwdIBBaM8xVHivjigb:Hkvr942MPa6n7lhBsM8xVHivj
- TLSH T17BA3393BAB1D10ABD269D4BCCA534941DB72BC854791A7CF57A00ADB0F27BE44E3E601
- MD5 SHA1 SHA512 SSDEEP TLSH
- Path C:\Users\Admin\AppData\Local\Temp\is-W3WNMJFS7O.tmp\894d10789d061c2a2a8056956364fe11686e48a3f9a69b19a0bfe65db4649d40.tmp
- Size 4.2MB
- SHA256 208908973308e0bee6e788d71fd22f9f60c67acdd0fbf251edbbdddf432a694f
- MD5 a8dba27ab73120943751c047ecc6e9ea
- SHA1 72d9f43f7455a0c6e2cb2ffd6d4e84b2acb5afe7
- SHA512 f71a967f70eefae43439fec3901d5fae2e98f30acd7506644ffc08958c8bd7871352055120eb3cabc4a6740e1bfe6917672f2432a7b998c32c228b98b6cf22ac
- SSDEEP 98304:5YU5hnuOajWwMPdCpepI3GrwrA+Js333Pl:7xuHjWfZIzel
- TLSH T1CB268F03F388753EE4571A3A583FA280983F7A213915CD4B6BFC295C8F396416D2A797
- MD5 SHA1 SHA512 SSDEEP TLSH