Analysis
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max time kernel
148s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
06-04-2024 01:45
Behavioral task
behavioral1
Sample
e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exe
Resource
win7-20240215-en
General
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Target
e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exe
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Size
17.3MB
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MD5
f429810f03b2e5472f51f22dbbf6f165
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SHA1
361572f7729f71af2d77c2db0d352d6eb3b11cda
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SHA256
e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55
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SHA512
7453bc834416b652ac93315c3c86cec371f2a042bdbd368514ef38f5337c9d2e99ecdd4baf94ec40d71b0fece5dfc6e611e1424f7caa61f823c64dd787525b92
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SSDEEP
393216:BMlU2nBTLv7A1J9mA0Z8h6B3LhmNm4S0JWeG7PX:ByU2nBTLv7A1OAO7B3FcfSX
Malware Config
Signatures
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UPX dump on OEP (original entry point) 2 IoCs
Processes:
resource yara_rule behavioral2/memory/4968-0-0x0000000000400000-0x00000000029C9000-memory.dmp UPX behavioral2/memory/4968-66-0x0000000000400000-0x00000000029C9000-memory.dmp UPX -
Checks computer location settings 2 TTPs 4 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
rutserv.exerfusclient.exee99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exerfusclient.exedescription ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation rutserv.exe Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation rfusclient.exe Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exe Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation rfusclient.exe -
Executes dropped EXE 4 IoCs
Processes:
rfusclient.exerutserv.exerutserv.exerfusclient.exepid Process 2900 rfusclient.exe 1664 rutserv.exe 2044 rutserv.exe 1416 rfusclient.exe -
Loads dropped DLL 4 IoCs
Processes:
rutserv.exerutserv.exepid Process 1664 rutserv.exe 1664 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe -
Processes:
resource yara_rule behavioral2/memory/4968-0-0x0000000000400000-0x00000000029C9000-memory.dmp upx behavioral2/memory/4968-66-0x0000000000400000-0x00000000029C9000-memory.dmp upx -
Drops file in System32 directory 8 IoCs
Processes:
rutserv.exedescription ioc Process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\3EC49180A59F0C351C30F112AD97CFA5_ED80F76A55EEDF047A88FD3F37D62FA3 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 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\26C212D9399727259664BDFCA073966E_C5856A5EB1E3B74AE8014850A678CDBF 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\Content\26C212D9399727259664BDFCA073966E_C5856A5EB1E3B74AE8014850A678CDBF rutserv.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\3EC49180A59F0C351C30F112AD97CFA5_ED80F76A55EEDF047A88FD3F37D62FA3 rutserv.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies data under HKEY_USERS 45 IoCs
Processes:
rutserv.exedescription ioc Process Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CRLs rutserv.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@C:\Windows\system32\ieframe.dll,-5723 = "The Internet" rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\Certificates 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\22\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\SmartCardRoot\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust rutserv.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@C:\Windows\system32\windows.storage.dll,-9216 = "This PC" rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\Certificates 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\Policies\Microsoft\SystemCertificates\trust rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\Disallowed\CTLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Root\CRLs rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\TrustedPeople rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople rutserv.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\22\52C64B7E\@C:\Windows\system32\prnfldr.dll,-8036 = "Printers" rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\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\TrustedPeople\Certificates rutserv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CRLs rutserv.exe -
Suspicious behavior: EnumeratesProcesses 20 IoCs
Processes:
rfusclient.exerutserv.exerutserv.exerfusclient.exepid Process 2900 rfusclient.exe 2900 rfusclient.exe 1664 rutserv.exe 1664 rutserv.exe 1664 rutserv.exe 1664 rutserv.exe 1664 rutserv.exe 1664 rutserv.exe 1664 rutserv.exe 1664 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 1416 rfusclient.exe 1416 rfusclient.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
rutserv.exerutserv.exedescription pid Process Token: SeDebugPrivilege 1664 rutserv.exe Token: SeTakeOwnershipPrivilege 2044 rutserv.exe Token: SeTcbPrivilege 2044 rutserv.exe Token: SeTcbPrivilege 2044 rutserv.exe -
Suspicious use of FindShellTrayWindow 2 IoCs
Processes:
rfusclient.exepid Process 1416 rfusclient.exe 1416 rfusclient.exe -
Suspicious use of SendNotifyMessage 2 IoCs
Processes:
rfusclient.exepid Process 1416 rfusclient.exe 1416 rfusclient.exe -
Suspicious use of SetWindowsHookEx 9 IoCs
Processes:
rutserv.exerutserv.exepid Process 1664 rutserv.exe 1664 rutserv.exe 1664 rutserv.exe 1664 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe 2044 rutserv.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exerfusclient.exerutserv.exedescription pid Process procid_target PID 4968 wrote to memory of 2900 4968 e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exe 84 PID 4968 wrote to memory of 2900 4968 e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exe 84 PID 4968 wrote to memory of 2900 4968 e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exe 84 PID 2900 wrote to memory of 1664 2900 rfusclient.exe 85 PID 2900 wrote to memory of 1664 2900 rfusclient.exe 85 PID 2900 wrote to memory of 1664 2900 rfusclient.exe 85 PID 2044 wrote to memory of 1416 2044 rutserv.exe 89 PID 2044 wrote to memory of 1416 2044 rutserv.exe 89 PID 2044 wrote to memory of 1416 2044 rutserv.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exe"C:\Users\Admin\AppData\Local\Temp\e99121de906a1fb921f1f4388fcffd3424000340a49d5d4f45f3aa912f1eeb55.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4968 -
C:\Users\Admin\AppData\Roaming\Remote Utilities Agent\70220\A2F2E8D838\rfusclient.exe"C:\Users\Admin\AppData\Roaming\Remote Utilities Agent\70220\A2F2E8D838\rfusclient.exe" -run_agent2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2900 -
C:\Users\Admin\AppData\Roaming\Remote Utilities Agent\70220\A2F2E8D838\rutserv.exe"C:\Users\Admin\AppData\Roaming\Remote Utilities Agent\70220\A2F2E8D838\rutserv.exe" -run_agent3⤵
- Checks computer location settings
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1664 -
C:\Users\Admin\AppData\Roaming\Remote Utilities Agent\70220\A2F2E8D838\rutserv.exe"C:\Users\Admin\AppData\Roaming\Remote Utilities Agent\70220\A2F2E8D838\rutserv.exe" -run_agent -second4⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2044 -
C:\Users\Admin\AppData\Roaming\Remote Utilities Agent\70220\A2F2E8D838\rfusclient.exe"C:\Users\Admin\AppData\Roaming\Remote Utilities Agent\70220\A2F2E8D838\rfusclient.exe" /tray /user5⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1416
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
15KB
MD59b0e600eb09e7a86199f7ba245d1cd2b
SHA1e3e52b3e04b08e59aae74300f7d30c3d0aa27148
SHA256879180116b82210292648709982f405eae84b05e6f2ff324a6a5cc7cd512d3e7
SHA512dd1622474c48ecf5c95e7585fb30b5279cf45dfc89332531758838b05f73499f536f7cadaf529aa4fa5ae0808e30a455465829db7d13f2ee2e7d9b7bd12e17e5
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Filesize
52KB
MD5b2e6147f97dae696265a089f98ce8106
SHA1418f20ec486b7a9368ceff183e7cebae9ba52101
SHA25644917b2c260fea3a0f4691f6e986c25e31b3f9ff22dcd055526199b4d8a54051
SHA512789dd02281b71fab54f42b92b5c0c76c0266c40100dbe532ad3ebbf968e8a9e674f0be57e2ffdb10eb4a6b4faa15a6a6a92907c020c6cd2990427d890d7f5026
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Filesize
1.3MB
MD5b0433711581916700978618558131929
SHA16513c7c14f19fa37c73926fc098a9da678621e04
SHA25626b24dcd9cb7ab8761ae7fb597704f81e2a6ede6572a247c39a969960dbba539
SHA512a1d8bcd4b641b5e54a4435a70e19a56ecce6dc9c7d9b6fc28f7829de96d139c9cfd10f35f096529f8d33583bea8ffe1b6c2636f2710d9d01f1a7513f77db8589
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Filesize
10.4MB
MD56aae165f3b1575db887a0370cfc80083
SHA118bc72662b4366035932719ef131417aacf9c184
SHA2560c89262a283c80121ba1176345b230d0ade61cfcf682b92e555a48206fb4074a
SHA512666f1a5c6b0c7a5315d70eb0d75da6232105e5673b44f6137be4b10377b8d07c21720d05360cc653f543657478b08eee1d95db5fb1cb8d82d5c2a0f2ff68e7c7
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Filesize
20.2MB
MD5652c2a693b333504a3879460d0af7224
SHA1235ba3847df3f39ad445b5b912cb2fb5224d9e59
SHA256760e2fd3e57186b597d40b996811768e6c4a28ca54685e029104fcf82f68238d
SHA512a717e916e9d881970694856f79f0e571b95c350f0b771027188dc9b27ab99c193149d4fe0e32cb4638c840340eb1dbd7fbf7458a58985a3e5be7da3345cd86c6
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Filesize
338KB
MD574f9696be4b46f04a1263c3181405c35
SHA1cf66b349beaa2bc25ed5807763e32018e4304c7b
SHA256d6e8bee1a9476ed3be229f4be81cc1154f1ed425e50e74fd1abcd76c56ea062c
SHA512f122e00b795476809994733028346d82945566ce4c2be26444f02e077658ccb1ba0f3fe221cef37837941054fe4b3b54b3f9a74861f890e56544d1453823fd68
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Filesize
380KB
MD5c14000f68306f1cf0ec799df9568ae01
SHA1788d8d7a0ba86ba6c7ef4f7ae50cdc65ddb348ff
SHA25653b040341ce80f246c8437a99df5252a48801e2154eb94dc50af54a75d8d85ac
SHA5122d4769949832794ce310474f843b696ea8eeb819554ecd72c449981988a6f8fbc5155d84a97d8a4c015348b3dfe6708f88c64b257d4a4d0d4a03dd068dda4113
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Filesize
1.6MB
MD530448db0aac5ac16d7ad789011bf8d20
SHA1457a43f6d2a0120c138dd9d57bcb64b21f84d9d7
SHA256d781088435617ca1facf74c1304f82afcb388813a75c8cb32213541d35b21832
SHA512300e3ae2ac133e2494c449354582ad9be51731d3e92d161b998db14262cc08436eeddb2b73a2f47cb4d1245348055f19e02721638a64a0630f513d4919b359dd
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Filesize
260KB
MD55e8673834662ac42b8363e19bc719282
SHA1bb1c1ed731830a03db47d232e748df4e4d196db9
SHA256a64a113955ec0d89ae6ff357f9bb1063c7dd29fe5610ee516a94ac17b11172c2
SHA5123cf558b2d3ca03aed1ef0cfe36fb7ff3fe7a3af63a4c3b0cb6cf13c58baacae17e5a01bad743affae8c4f5b9f5425dd4a97755aca2ded99e70d782f699a9e225
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Filesize
365KB
MD595d30b282132fb591fd5fdd94e52af05
SHA1eb7abe2f02c19ee41e4efc2506337288141d70ed
SHA256e6c04dc8359b2c76f765fce37ec123d33acbc5ce93e60022ba88eb7c867ac3f6
SHA5129e4ea23519d243d6d3ae93d2501f05f35aa1cc6264adb8f180f8a255bd35fb7996e110ac0ec7960fa0b93062be45eb0c0922d9597e76ee8180781cc5c9a9c792
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Filesize
860KB
MD5a663e7ef3f3cd7a1d4790b4ebf491c27
SHA1bfe086e653d0bc8d20acae61990ba4fa33f2a1f7
SHA2568b1f95d7c0fdf25a6278347afda2f5ac4c86045c7fc530a330be885d8a87ea68
SHA512e78460c287646f509a50b878a34392546e01803a46c389e942073013a8292e3653713f2b6067842ecccb09b7cdc13d1d9fff76065aa61910fc3cebe6a1c20c47