Analysis
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max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
19-04-2024 17:40
Behavioral task
behavioral1
Sample
cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe
Resource
win10v2004-20240412-en
General
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Target
cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe
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Size
83KB
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MD5
50d4a04522a21e540cbf368f49432778
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SHA1
55a4445ad3213788803c3fcd5adce45137b3a155
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SHA256
cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f
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SHA512
08ebf0b333ad8dc8951347437bc2f1b7647763aaf4dce13d8ab1db14bc66539fd58ba263572b57e07c24b4470b3100585e881a843d663dff1eb7e5201f4e4bae
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SSDEEP
1536:5M8/+vtlxZTLY9qgJodItYg2pyb4WR927FSijIVTUKvScg7DSf:T+rx98qgJoItKfqYpxsYcg7DK
Malware Config
Signatures
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Gh0st RAT payload 2 IoCs
Processes:
resource yara_rule C:\Windows\SysWOW64\ntfastuserswitchingcompatibility.dll family_gh0strat behavioral2/memory/2436-5-0x0000000000400000-0x0000000000432000-memory.dmp family_gh0strat -
Sets DLL path for service in the registry 2 TTPs 1 IoCs
Processes:
cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\fastuserswitchingcompatibility\Parameters\ServiceDll = "C:\\Windows\\system32\\ntfastuserswitchingcompatibility.dll" cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe -
Deletes itself 1 IoCs
Processes:
svchost.exepid process 4504 svchost.exe -
Loads dropped DLL 1 IoCs
Processes:
svchost.exepid process 4504 svchost.exe -
Processes:
resource yara_rule behavioral2/memory/2436-0-0x0000000000400000-0x0000000000432000-memory.dmp upx behavioral2/memory/2436-5-0x0000000000400000-0x0000000000432000-memory.dmp upx -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
svchost.exedescription ioc process File opened for modification \??\PhysicalDrive0 svchost.exe -
Drops file in System32 directory 2 IoCs
Processes:
cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exedescription ioc process File opened for modification C:\Windows\SysWOW64\d2f5ca0e.del cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe File opened for modification C:\Windows\SysWOW64\ntfastuserswitchingcompatibility.dll cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
svchost.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz svchost.exe -
Modifies data under HKEY_USERS 5 IoCs
Processes:
svchost.exedescription ioc process Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft svchost.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie svchost.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum\Version = "7" svchost.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\ActiveMovie\devenum svchost.exe Key created \REGISTRY\USER\.DEFAULT\Software svchost.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exepid process 2436 cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe 2436 cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe -
Suspicious use of AdjustPrivilegeToken 7 IoCs
Processes:
svchost.exedescription pid process Token: SeBackupPrivilege 4504 svchost.exe Token: SeSecurityPrivilege 4504 svchost.exe Token: SeSecurityPrivilege 4504 svchost.exe Token: SeBackupPrivilege 4504 svchost.exe Token: SeSecurityPrivilege 4504 svchost.exe Token: SeBackupPrivilege 4504 svchost.exe Token: SeSecurityPrivilege 4504 svchost.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe"C:\Users\Admin\AppData\Local\Temp\cf8ecb6dbe903a56679d0adaaf5588a58c0f5ac1999fe187189e4d04c916015f.exe"1⤵
- Sets DLL path for service in the registry
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
PID:2436
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C:\Windows\SysWOW64\svchost.exeC:\Windows\SysWOW64\svchost.exe -k netsvcs -s fastuserswitchingcompatibility1⤵
- Deletes itself
- Loads dropped DLL
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:4504
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Windows\SysWOW64\ntfastuserswitchingcompatibility.dllFilesize
148KB
MD5b6c23f023be3a7a36f26d2a45f5230b0
SHA167cfc2a6e180c9678acd3333c8b63a125f89de9f
SHA256d04001c208aa6c045d9d7ddc11f0ad459ba3f880c4315d4d6d9c57edc9ab9fc4
SHA5121dfc32871758871f6f416441fcb34974d7f4d66c6d1740d8e11a79a278ce3a46739a842db24da741a7ae263fdccf59174f695fa3f3f41c96a6452f493b04c24e
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memory/2436-0-0x0000000000400000-0x0000000000432000-memory.dmpFilesize
200KB
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memory/2436-5-0x0000000000400000-0x0000000000432000-memory.dmpFilesize
200KB