Analysis
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max time kernel
147s -
max time network
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platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
03-01-2025 03:20
Behavioral task
behavioral1
Sample
289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2.exe
Resource
win7-20240903-en
General
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Target
289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2.exe
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Size
17.1MB
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MD5
f7008ead3fc74cc9e4721d4dd7553803
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SHA1
7b53ecab76e61a14f46e96876a3a23586b6497f4
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SHA256
289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2
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SHA512
8e8d1b45612db65babcfceaad8d9a96a46a4ce632c6e520711c30514747f75c9c6cc69ed422d2673a95fc4f16e860a06ef9c5308d265a85ba5917c6ae54a9741
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SSDEEP
393216:C9yp68XkPbywu1bO2I2prEoyoHzokCEIo3mjl6M:+MFXqu1bO2I2pIotEkg6M
Malware Config
Signatures
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Rms family
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Checks computer location settings 2 TTPs 4 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation rfusclient.exe Key value queried \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation rutserv.exe Key value queried \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation rfusclient.exe Key value queried \REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation 289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2.exe -
Drops file in System32 directory 14 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B039FEA45CB4CC4BBACFC013C7C55604_50385F8EB1F713E33924A830D7A2A41C rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164 rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\A1D627669EFC8CD4F21BCF387D97F9B5_E818918BC57803438E0E0146A88425A7 rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\A1D627669EFC8CD4F21BCF387D97F9B5_E818918BC57803438E0E0146A88425A7 rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F59A01A8B782D93EA6991BC172CEFFB1 rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\77EC63BDA74BD0D0E0426DC8F8008506 rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\9CB4373A4252DE8D2212929836304EC5_6C354C532D063DF5607A63BA827F5164 rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F59A01A8B782D93EA6991BC172CEFFB1 rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506 rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B039FEA45CB4CC4BBACFC013C7C55604_50385F8EB1F713E33924A830D7A2A41C rutserv.exe -
resource yara_rule behavioral2/memory/2220-0-0x0000000000400000-0x0000000002969000-memory.dmp upx behavioral2/memory/2220-71-0x0000000000400000-0x0000000002969000-memory.dmp upx -
Executes dropped EXE 4 IoCs
pid Process 744 rfusclient.exe 4100 rutserv.exe 3408 rutserv.exe 1332 rfusclient.exe -
Loads dropped DLL 4 IoCs
pid Process 4100 rutserv.exe 4100 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe -
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 5 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 rfusclient.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rfusclient.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rutserv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language rutserv.exe -
Modifies data under HKEY_USERS 46 IoCs
description ioc Process Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CTLs rutserv.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@C:\Windows\system32\prnfldr.dll,-8036 = "Printers" rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust rutserv.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@C:\Windows\system32\ieframe.dll,-5723 = "The Internet" rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\My rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates rutserv.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@C:\Windows\system32\windows.storage.dll,-9216 = "This PC" rutserv.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@C:\Windows\system32\NetworkExplorer.dll,-1 = "Network" rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs rutserv.exe -
Suspicious behavior: EnumeratesProcesses 20 IoCs
pid Process 744 rfusclient.exe 744 rfusclient.exe 4100 rutserv.exe 4100 rutserv.exe 4100 rutserv.exe 4100 rutserv.exe 4100 rutserv.exe 4100 rutserv.exe 4100 rutserv.exe 4100 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 1332 rfusclient.exe 1332 rfusclient.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
description pid Process Token: SeDebugPrivilege 4100 rutserv.exe Token: SeTakeOwnershipPrivilege 3408 rutserv.exe Token: SeTcbPrivilege 3408 rutserv.exe Token: SeTcbPrivilege 3408 rutserv.exe -
Suspicious use of FindShellTrayWindow 3 IoCs
pid Process 1332 rfusclient.exe 1332 rfusclient.exe 1332 rfusclient.exe -
Suspicious use of SendNotifyMessage 3 IoCs
pid Process 1332 rfusclient.exe 1332 rfusclient.exe 1332 rfusclient.exe -
Suspicious use of SetWindowsHookEx 9 IoCs
pid Process 4100 rutserv.exe 4100 rutserv.exe 4100 rutserv.exe 4100 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe 3408 rutserv.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2220 wrote to memory of 744 2220 289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2.exe 83 PID 2220 wrote to memory of 744 2220 289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2.exe 83 PID 2220 wrote to memory of 744 2220 289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2.exe 83 PID 744 wrote to memory of 4100 744 rfusclient.exe 84 PID 744 wrote to memory of 4100 744 rfusclient.exe 84 PID 744 wrote to memory of 4100 744 rfusclient.exe 84 PID 3408 wrote to memory of 1332 3408 rutserv.exe 88 PID 3408 wrote to memory of 1332 3408 rutserv.exe 88 PID 3408 wrote to memory of 1332 3408 rutserv.exe 88
Processes
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C:\Users\Admin\AppData\Local\Temp\289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2.exe"C:\Users\Admin\AppData\Local\Temp\289b9759c512dc13b0ae3e7df24bd2d5f02397c27f358274274c6dc640171ae2.exe"1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2220 -
C:\Users\Admin\AppData\Roaming\RMS Agent\70220\F1490BCD04\rfusclient.exe"C:\Users\Admin\AppData\Roaming\RMS Agent\70220\F1490BCD04\rfusclient.exe" -run_agent2⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:744 -
C:\Users\Admin\AppData\Roaming\RMS Agent\70220\F1490BCD04\rutserv.exe"C:\Users\Admin\AppData\Roaming\RMS Agent\70220\F1490BCD04\rutserv.exe" -run_agent3⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4100 -
C:\Users\Admin\AppData\Roaming\RMS Agent\70220\F1490BCD04\rutserv.exe"C:\Users\Admin\AppData\Roaming\RMS Agent\70220\F1490BCD04\rutserv.exe" -run_agent -second4⤵
- Drops file in System32 directory
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3408 -
C:\Users\Admin\AppData\Roaming\RMS Agent\70220\F1490BCD04\rfusclient.exe"C:\Users\Admin\AppData\Roaming\RMS Agent\70220\F1490BCD04\rfusclient.exe" /tray /user5⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1332
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
133KB
MD57fd09e69fa62629a04d1e23bb8ca5ff6
SHA13952c5f339c8bbdf17aff113bcb0149ac8ce4fa6
SHA256f9c56736029b7d278bf8fabc6e0f5bdac67e24b088f2172ea07df2baa3072c19
SHA512e66d523eb5bdfc517749b608ffcd66b883be9c4b8c5c42dbf7e48fe412a5c0ca0876d0dbc8a68355e7bb532ce8749c5e444a25f996b4c27e382e79579ab2b59a
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Filesize
51KB
MD54e84df6558c385bc781cddea34c9fba3
SHA16d63d87c19c11bdbfa484a5835ffffd7647296c8
SHA2560526073f28a3b5999528bfa0e680d668922499124f783f02c52a3b25c367ef6d
SHA512c35da0744568bfffeff09e6590d059e91e5d380c5feb3a0fbc5b19477ceca007a882884a7033345ce408fce1deac5248ad9b046656478d734fe494b787f8a9f2
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Filesize
1.3MB
MD55222eaf78313758b0520be16e3f8392e
SHA19c7cc8fb340618fef38422cf0c75c4c9bfb216e2
SHA2564771b71a48190504094d104087dd431c1c40bde6fad0338a86aa42f7f2a457a5
SHA512459503146f963c64777c56176e480e3334c5bcff2bfef14fc2925b38f1f32117c387dc957789e1691a68798c004c9e672460bda51edcc7b45fb0e1553bf66812
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Filesize
10.3MB
MD52edafb34eb63daee875fecc5b19246a2
SHA12a43141312241ba7f3830242f6934a0e1203350d
SHA256cf49b75a2d687a2699a32f34bbebca1e5b65421ce0828c22e226dda1e26dd28b
SHA512cf732dfc0151ece0fcd637ee1cd9d59a1728a587f6922646465c03b347a235211fe38459e96c7304cf88418a886a5441c93ee31e16b7917c94347013fdc606b3
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Filesize
20.2MB
MD54bd8516dc7c798b63b69b7b668d4fc20
SHA157f3a92681aa9e4a57ddf9b0ac5091c0e393053e
SHA256399f620d9b547d9f9e5d41067e6cbe2d58714d4991901180fbac5661b149d077
SHA51271469af6064d3e1d279a7b249d4cd18e8cf4abbf8375f35ca1f7287ae7b29848bb23dbfe0cc2962283a9fae6886aa64d328e165de9eb2198b82a6803ff348d81
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Filesize
7KB
MD599d07c46e0663a0af1778721c3bb3371
SHA140a02329941d5a4fdf15f04455474f374ca3f748
SHA2560f2bbb1f1773a85b53d45dea51111456c3ffb259bc3bdc89034b877d619cad96
SHA512c6b371b627bdcebf7b2bf619a00451a8140c0387705a57f34a7add23f9b336a09b7c28a8834449a3e97d7252624e2e015e0a3537e3fa65128a2facc390aa279a
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Filesize
337KB
MD590a4b7fc6807693e68dd32b68614d989
SHA1785484ef531ca90f323d5b017fefcff05e68093a
SHA2564f475bd6235d2f761f6c6dbdf3f4b2f35fc6a3787e6b1b28a1912e85cb9be2f6
SHA51297b970cb24774f141042149ac53e45b3fc42f9ce911c0ca774aa3812f48d7744434bf31d217b2a8522439d0e3f71048cc916556c18a71be61b203c942373a81c
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Filesize
379KB
MD5e247666cdea63da5a95aebc135908207
SHA14642f6c3973c41b7d1c9a73111a26c2d7ac9c392
SHA256b419ed0374e3789b4f83d4af601f796d958e366562a0aaea5d2f81e82abdcf33
SHA51206da11e694d5229783cfb058dcd04d855a1d0758beeaa97bcd886702a1502d0bf542e7890aa8f2e401be36ccf70376b5c091a5d328bb1abe738bc0798ab98a54
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Filesize
1.6MB
MD5d5c2a6ac30e76b7c9b55adf1fe5c1e4a
SHA13d841eb48d1a32b511611d4b9e6eed71e2c373ee
SHA25611c7004851e6e6624158990dc8abe3aa517bcab708364d469589ad0ca3dba428
SHA5123c1c7fb535e779ac6c0d5aef2d4e9239f1c27136468738a0bd8587f91b99365a38808be31380be98fd74063d266654a6ac2c2e88861a3fe314a95f1296699e1d
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Filesize
259KB
MD549c51ace274d7db13caa533880869a4a
SHA1b539ed2f1a15e2d4e5c933611d736e0c317b8313
SHA2561d6407d7c7ffd2642ea7f97c86100514e8e44f58ff522475cb42bcc43a1b172b
SHA51213440009e2f63078dce466bf2fe54c60feb6cedeed6e9e6fc592189c50b0780543c936786b7051311089f39e9e3ccb67f705c54781c4cae6d3a8007998befbf6
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Filesize
364KB
MD5eda07083af5b6608cb5b7c305d787842
SHA1d1703c23522d285a3ccdaf7ba2eb837d40608867
SHA256c4683eb09d65d692ca347c0c21f72b086bd2faf733b13234f3a6b28444457d7d
SHA512be5879621d544c4e2c4b0a5db3d93720623e89e841b2982c7f6c99ba58d30167e0dd591a12048ed045f19ec45877aa2ef631b301b903517effa17579c4b7c401
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Filesize
859KB
MD5642dc7e57f0c962b9db4c8fb346bc5a7
SHA1acee24383b846f7d12521228d69135e5704546f6
SHA25663b4b5db4a96a8abec82b64034f482b433cd4168c960307ac5cc66d2fbf67ede
SHA512fb163a0ce4e3ad0b0a337f5617a7bf59070df05cc433b6463384e8687af3edc197e447609a0d86fe25ba3ee2717fd470f2620a8fc3a2998a7c3b3a40530d0bae