Analysis
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max time kernel
147s -
max time network
138s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
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submitted
02-09-2024 12:26
General
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Target
lk.exe
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Size
146KB
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MD5
7f6830b77ad13b244bc5d702d67137bf
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SHA1
1fbd763388a3e9679ac66b35da8a78e041611fe4
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SHA256
e097f98ea3416330ed2fd7856743d68a7ca880c6d57e8c264a384a112ac5a390
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SHA512
488cb83c7267cfc70989e09489373f4372325531f7c02b1711fbdf6dfeaa377c39b84d5e971136e0e41d0a6dcde52ec4d21a749169eedb9e9ba43eb9caf077de
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SSDEEP
3072:c6glyuxE4GsUPnliByocWep0XL63DjDeprS:c6gDBGpvEByocWeOmuNS
Malware Config
Signatures
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Renames multiple (668) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Deletes itself 1 IoCs
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Executes dropped EXE 1 IoCs
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 2 IoCs
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Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
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Drops file in System32 directory 4 IoCs
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Sets desktop wallpaper using registry 2 TTPs 2 IoCs
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Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
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Enumerates system info in registry 2 TTPs 3 IoCs
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Modifies Control Panel 2 IoCs
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Modifies registry class 5 IoCs
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Suspicious behavior: EnumeratesProcesses 64 IoCs
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Suspicious behavior: RenamesItself 26 IoCs
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Suspicious use of AdjustPrivilegeToken 64 IoCs
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Suspicious use of SetWindowsHookEx 13 IoCs
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Suspicious use of WriteProcessMemory 11 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\lk.exe"C:\Users\Admin\AppData\Local\Temp\lk.exe"1⤵
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\splwow64.exeC:\Windows\splwow64.exe 122882⤵
- Drops file in System32 directory
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C:\ProgramData\F454.tmp"C:\ProgramData\F454.tmp"2⤵
- Checks computer location settings
- Deletes itself
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: RenamesItself
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\F454.tmp >> NUL3⤵
- System Location Discovery: System Language Discovery
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc1⤵
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C:\Windows\system32\printfilterpipelinesvc.exeC:\Windows\system32\printfilterpipelinesvc.exe -Embedding1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE/insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{BFDC15FC-A67A-4CA2-892F-362B011859CD}.xps" 1336975358403100002⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
129B
MD5176c155fcea5838f6dd3292c626d6e9f
SHA10bf2ea631f732ebe9dda432ce9975703cb534f36
SHA256708a2489a48aab4a3165c66e28189f81004f42097f5d34263894b7fc7acc677b
SHA512ab5bff05d09f560f20d1afc2d8aa94998cf40e1f5d5bc466c048e12ea3995b34e13a1696d482c6984b9c96ff5d4be639d1af5a97090a4b21640a63176374396a
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Filesize
14KB
MD5294e9f64cb1642dd89229fff0592856b
SHA197b148c27f3da29ba7b18d6aee8a0db9102f47c9
SHA256917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
SHA512b87d531890bf1577b9b4af41dddb2cdbbfa164cf197bd5987df3a3075983645a3acba443e289b7bfd338422978a104f55298fbfe346872de0895bde44adc89cf
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Filesize
146KB
MD5978f8c411ab60b61e3ce054577db62eb
SHA12f860a61a67a10d5cf137f371f8ad45a6a1683ef
SHA256ecf91b36bbaf3d5926a9a584e89d2d195f237b143959e9b7c81b7f54a39a9f20
SHA512f4266ab735a70af96db70ab57b9ff523a6aa9670bb9f7c9ea22835c1022b66f626a9f1595fd622bd39232e52382eff500050ce503b1658eb85300a9826bbd31a
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Filesize
4KB
MD5dc039dee45de64901b900a71cbf84f1a
SHA1d9f51599741134681754fadb61b737bb383b5203
SHA256fa261727b20b8ac302906042f327f250cbaba2d6aeb4d48d216dac19625daeda
SHA512a66f89cbf7d16180deb866b5df6d59994ac48347a1a9c1631b5003fa7a5ffe361d8aca1e0659c5206791cc0ae6180c44b7e676b3dcc96d81fdc193204f27a89b
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Filesize
343B
MD572b1ffaeb7de456483f491ecceadb088
SHA1ee1953abc295245ab01f35a4a823883826bf2b41
SHA256eb892eac9899b995047733bb17acd4945eb42b7b49f2ee8ad52b8026bc0297a7
SHA512c0e7cad617cf1490bb25fc47936edc3ae164b190ed34f2d2a50e7e84ce6e0d6712a6ba9ab351cca1589266078326a00317516c53fecf96f20eaefe15e92ce445
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Filesize
129B
MD52cab3deb3bf1df436e822be1f2d76242
SHA11e788dbe6c46d7d5c0802c3a2d5d6598f6d4217c
SHA2563f86385dec8d7ee12f4487b229601f3858b2bc8106fbac4b2f820889af686258
SHA512e175ebc7e8fd5d637e9111cb99050770f3728e8a814ff5416ed96fd3b201837fcd8cf106ba96f9a27550593399f615cbe2b101686c51c0a1a2f3f4d111e2c21f
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Filesize
64KB
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Filesize
64KB
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Filesize
64KB
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Filesize
64KB
-
Filesize
64KB
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Filesize
64KB
-
Filesize
64KB
-
Filesize
64KB
-
Filesize
64KB
-
Filesize
64KB
-
Filesize
64KB
-
Filesize
64KB
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Filesize
64KB