Analysis
- max time kernel
148s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system - submitted
22/12/2023, 17:18
Behavioral task
behavioral1
Sample
fdfb2d693550b116dcee622d470187e8.exe
Resource
win7-20231215-en
14 signatures
150 seconds
Behavioral task
behavioral2
Sample
fdfb2d693550b116dcee622d470187e8.exe
Resource
win10v2004-20231215-en
16 signatures
150 seconds
General
- Target fdfb2d693550b116dcee622d470187e8.exe
- Size 1.4MB
- Sample231222-vvhsdaefa7
- SHA256 8b5bc0141355c0b6ed6e40892c3e64500fe13e014cbe6d0623afbb6a2f934286
- MD5 fdfb2d693550b116dcee622d470187e8
- SHA1 31a0e9efe72e2fa387db4ee7e2ef52328e9e1766
- SHA512 4b724041e202624664ea652bc2514614edc33815fa5de6e8c12731766f0085d51160ed27007e1c8ec36c7e41611b6edb5ec93a611bf8a8f4d35b4f41c6e2eae6
- SSDEEP 24576:PT3E0UelkojTr7v9mWKJSgs0uLJrmSFHqPEkISEwCyJGPk7RR:rjUeKwvv9jo/s0UZNFHbwO0
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Detect ZGRat V1 4 IoCs
resource yara_rule behavioral2/memory/4848-0-0x0000000000880000-0x0000000000B44000-memory.dmp family_zgrat_v1 behavioral2/files/0x0006000000023210-12.dat family_zgrat_v1 behavioral2/files/0x000600000002321f-46.dat family_zgrat_v1 behavioral2/files/0x000600000002321f-45.dat family_zgrat_v1 - Process spawned unexpected child process 14 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
description pid pid_target Process procid_target Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 5044 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4648 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3520 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3304 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4900 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4320 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4660 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 2664 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3312 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 1828 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 4216 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3272 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 3908 3552 schtasks.exe 92 Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process 208 3552 schtasks.exe 92 - Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation fdfb2d693550b116dcee622d470187e8.exe Key value queried \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation fdfb2d693550b116dcee622d470187e8.exe - Executes dropped EXE 1 IoCs
pid Process 4904 sihclient.exe -
resource yara_rule behavioral2/memory/4848-0-0x0000000000880000-0x0000000000B44000-memory.dmp vmprotect behavioral2/files/0x0006000000023210-12.dat vmprotect behavioral2/files/0x000600000002321f-46.dat vmprotect behavioral2/files/0x000600000002321f-45.dat vmprotect - Adds Run key to start application 2 TTPs 14 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Windows\\System32\\SmallRoom\\RuntimeBroker.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Windows\\System32\\AssignedAccessShellProxy\\RuntimeBroker.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\odt\\winlogon.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Windows\\System32\\perfi009\\RuntimeBroker.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\backgroundTaskHost = "\"C:\\odt\\backgroundTaskHost.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Program Files (x86)\\Adobe\\Acrobat Reader DC\\fontdrvhost.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\PerfLogs\\spoolsv.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\ModemLogs\\csrss.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Recovery\\WindowsRE\\csrss.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhostw = "\"C:\\Windows\\System32\\rilproxy\\taskhostw.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\StartMenuExperienceHost = "\"C:\\Windows\\SystemApps\\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\\StartUI\\StartMenuExperienceHost.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysmon = "\"C:\\Windows\\notepad\\sysmon.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Recovery\\WindowsRE\\lsass.exe\"" fdfb2d693550b116dcee622d470187e8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysmon = "\"C:\\Windows\\winhlp32\\sysmon.exe\"" fdfb2d693550b116dcee622d470187e8.exe - Drops file in System32 directory 9 IoCs
description ioc Process File created C:\Windows\System32\AssignedAccessShellProxy\RuntimeBroker.exe fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\System32\rilproxy\ea9f0e6c9e2dcd4dfacdaf29ba21541fb815a988 fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\System32\SmallRoom\9e8d7a4ca61bd92aff00cc37a7a4d62a2cac998d fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\System32\perfi009\RuntimeBroker.exe fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\System32\perfi009\9e8d7a4ca61bd92aff00cc37a7a4d62a2cac998d fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\System32\rilproxy\taskhostw.exe fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\System32\SmallRoom\RuntimeBroker.exe fdfb2d693550b116dcee622d470187e8.exe File opened for modification C:\Windows\System32\SmallRoom\RuntimeBroker.exe fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\System32\AssignedAccessShellProxy\9e8d7a4ca61bd92aff00cc37a7a4d62a2cac998d fdfb2d693550b116dcee622d470187e8.exe - Drops file in Program Files directory 2 IoCs
description ioc Process File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\fontdrvhost.exe fdfb2d693550b116dcee622d470187e8.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\5b884080fd4f94e2695da25c503f9e33b9605b83 fdfb2d693550b116dcee622d470187e8.exe - Drops file in Windows directory 8 IoCs
description ioc Process File created C:\Windows\ModemLogs\csrss.exe fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\ModemLogs\886983d96e3d3e31032c679b2d4ea91b6c05afef fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\winhlp32\sysmon.exe fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\winhlp32\121e5b5079f7c0e46d90f99b3864022518bbbda9 fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartUI\StartMenuExperienceHost.exe fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartUI\55b276f4edf653fe07efe8f1ecc32d3d195abd16 fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\notepad\sysmon.exe fdfb2d693550b116dcee622d470187e8.exe File created C:\Windows\notepad\121e5b5079f7c0e46d90f99b3864022518bbbda9 fdfb2d693550b116dcee622d470187e8.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 14 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 3908 schtasks.exe 5044 schtasks.exe 4648 schtasks.exe 4900 schtasks.exe 2664 schtasks.exe 4320 schtasks.exe 3312 schtasks.exe 3520 schtasks.exe 4660 schtasks.exe 1828 schtasks.exe 208 schtasks.exe 3304 schtasks.exe 4216 schtasks.exe 3272 schtasks.exe - Suspicious behavior: EnumeratesProcesses 12 IoCs
pid Process 4848 fdfb2d693550b116dcee622d470187e8.exe 4848 fdfb2d693550b116dcee622d470187e8.exe 4848 fdfb2d693550b116dcee622d470187e8.exe 5028 fdfb2d693550b116dcee622d470187e8.exe 5028 fdfb2d693550b116dcee622d470187e8.exe 5028 fdfb2d693550b116dcee622d470187e8.exe 5028 fdfb2d693550b116dcee622d470187e8.exe 5028 fdfb2d693550b116dcee622d470187e8.exe 5028 fdfb2d693550b116dcee622d470187e8.exe 5028 fdfb2d693550b116dcee622d470187e8.exe 4904 sihclient.exe 4904 sihclient.exe - Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 4848 fdfb2d693550b116dcee622d470187e8.exe Token: SeDebugPrivilege 5028 fdfb2d693550b116dcee622d470187e8.exe Token: SeDebugPrivilege 4904 sihclient.exe - Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 4848 wrote to memory of 5028 4848 fdfb2d693550b116dcee622d470187e8.exe 95 PID 4848 wrote to memory of 5028 4848 fdfb2d693550b116dcee622d470187e8.exe 95 PID 5028 wrote to memory of 4904 5028 fdfb2d693550b116dcee622d470187e8.exe 116 PID 5028 wrote to memory of 4904 5028 fdfb2d693550b116dcee622d470187e8.exe 116 - Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
-
C:\Users\Admin\AppData\Local\Temp\fdfb2d693550b116dcee622d470187e8.exe"C:\Users\Admin\AppData\Local\Temp\fdfb2d693550b116dcee622d470187e8.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4848 -
C:\Users\Admin\AppData\Local\Temp\fdfb2d693550b116dcee622d470187e8.exe"C:\Users\Admin\AppData\Local\Temp\fdfb2d693550b116dcee622d470187e8.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5028 -
C:\Windows\ModemLogs\csrss.exe"C:\Windows\ModemLogs\csrss.exe"3⤵PID:4904
-
-
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:5044
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Adobe\Acrobat Reader DC\fontdrvhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4648
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\odt\backgroundTaskHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3520
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\perfi009\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3304
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\notepad\sysmon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4900
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartUI\StartMenuExperienceHost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4320
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\SmallRoom\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4660
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:2664
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\odt\winlogon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3312
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Windows\System32\rilproxy\taskhostw.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:1828
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\AssignedAccessShellProxy\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:4216
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\winhlp32\sysmon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3272
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\ModemLogs\csrss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:3908
-
C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\PerfLogs\spoolsv.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
PID:208
-
C:\Windows\System32\sihclient.exeC:\Windows\System32\sihclient.exe /cv lMR4Z8FyP0STSbS/ttNCTA.0.21⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4904
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\fdfb2d693550b116dcee622d470187e8.exe.log
- Size 1KB
- SHA256 f9c82a53d2671f346cceed279cd49e96372982e6a06029206f8a23f3d29ac237
- MD5 b02b55a5615d27ec8a9873a1f02b17b6
- SHA1 514b1de5480b69bbf4a8a5036fd6751f9ab8d9f5
- SHA512 3e4ad8add7009ef0978d906111e4885e5ac216d9a1601dbbb218b0e73d4548aef3bcd1ea673029c649c10c702be16c9ba8857aa5cd8f28bf7b287d92baa1caa2
- MD5 SHA1 SHA512
- Path C:\Windows\ModemLogs\csrss.exe
- Size 92KB
- SHA256 6a26e51311603dea70e113fb58627c0089a8bffdef1bfacb6ac2c0e167fff5d3
- MD5 30b9d95f1a478b23b55c557f80fa29e9
- SHA1 83f3366c86fb2054b131f5d3bded261788d596ce
- SHA512 e4e6f3f9c2e8fe4dada91a5cb710603f87b1379031ee108e26c67b58a706d59b61a3c5bbb51a355964f57fcc321b5eb698eabdf54e5c7bf6383aade2bfc749d3
- SSDEEP 1536:kn8BvbJ8ztX1BEMbWRU/0QRq7FzYzma27tumDsiwTKfIXch:FFenEUb/0jFzYz6EdfT/C
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Windows\System32\perfi009\RuntimeBroker.exe
- Size 384KB
- SHA256 404148db98b623dc23ab50cef8e101643c8ff9a853144f9cef3238e306abd231
- MD5 870d42b0a95dde7774ed7b6e86d19599
- SHA1 f5871eded0edb763b37aff125ce12f8ff9cb49fa
- SHA512 85974f52d91639a4e35d7d078875e149ba7f70a313f1ef44aebfec173f5bbc8d2d416236f64c264a53038974962170ac7ed9be48a99bad761e049923a6e220f4
- SSDEEP 6144:vLUbcRzYe3t+EjcmG6joputUZdFidjuEDaBApk+Fn3vdWa1f/iJ3Gia5Z:PT3EMtUZdFidYxKsa5iFGDZ
- MD5 SHA1 SHA512 SSDEEP