Analysis
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max time kernel
118s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
23-06-2024 13:23
Behavioral task
behavioral1
Sample
sd.exe
Resource
win7-20240220-en
General
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Target
sd.exe
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Size
203KB
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MD5
cb57bb7b429df360f87e1e83566ff9a7
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SHA1
8d03c9d0b486d0fcd2e271e0902039cdb0480705
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SHA256
1be5176e2bdc3b3434e8dc95c902e0cfaaaf7a23fc8203b413effc121011ad30
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SHA512
1859e20474b69aa658f723c08c6543505ebe1843d1b6eee401fb7688821485397e5d20b7589be81d4f0ad7071120be6b9595bfe82e096c85126dc282472f47b8
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SSDEEP
6144:sLV6Bta6dtJmakIM5O/Uj1i3VmcHhyT9O+PjmdR/Fyr:sLV6BtpmkV/UJilzHhUO+yd6
Malware Config
Signatures
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
sd.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\TCP Subsystem = "C:\\Program Files (x86)\\TCP Subsystem\\tcpss.exe" sd.exe -
Processes:
sd.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA sd.exe -
Drops file in Program Files directory 2 IoCs
Processes:
sd.exedescription ioc process File created C:\Program Files (x86)\TCP Subsystem\tcpss.exe sd.exe File opened for modification C:\Program Files (x86)\TCP Subsystem\tcpss.exe sd.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 2512 schtasks.exe 2628 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
sd.exepid process 2924 sd.exe 2924 sd.exe 2924 sd.exe 2924 sd.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
sd.exepid process 2924 sd.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
sd.exedescription pid process Token: SeDebugPrivilege 2924 sd.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
sd.exedescription pid process target process PID 2924 wrote to memory of 2512 2924 sd.exe schtasks.exe PID 2924 wrote to memory of 2512 2924 sd.exe schtasks.exe PID 2924 wrote to memory of 2512 2924 sd.exe schtasks.exe PID 2924 wrote to memory of 2512 2924 sd.exe schtasks.exe PID 2924 wrote to memory of 2628 2924 sd.exe schtasks.exe PID 2924 wrote to memory of 2628 2924 sd.exe schtasks.exe PID 2924 wrote to memory of 2628 2924 sd.exe schtasks.exe PID 2924 wrote to memory of 2628 2924 sd.exe schtasks.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\sd.exe"C:\Users\Admin\AppData\Local\Temp\sd.exe"1⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2924 -
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "TCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp83B.tmp"2⤵
- Scheduled Task/Job: Scheduled Task
PID:2512 -
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "TCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8C8.tmp"2⤵
- Scheduled Task/Job: Scheduled Task
PID:2628
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmp83B.tmpFilesize
1KB
MD5f7d890eac080bcc878916c23c4b34c3d
SHA1efa80352399bfd5c91b958dbc45228560e3a2b7e
SHA256a7c1ea9b3651907399af17cb4bbaa5696b6a4f0bdcb04640842fa7af3bf0a670
SHA512a03dfd061d8fe7d01333fbdc641a92d9daa56dd21758ce788ea3a5114de16fcc37acd5f7bb0aaad5b23dc74c50ce51ab80603f429bd61292d81497ce68287085
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C:\Users\Admin\AppData\Local\Temp\tmp8C8.tmpFilesize
1KB
MD54b7ef560289c0f62d0baf6f14f48a57a
SHA18331acb90dde588aa3196919f6e847f398fd06d1
SHA256062844155306130d6fafc4fe10ac9e5ddd2ed462532b729c50cdc979c0d83207
SHA512ecaa27c4b703d95f9f9b37d8c339982970482e7dab968c2010e0aa644bbfa31973111aafb827565af30c423d1d14e4ff997ec149614e713ff7ef3456894d02d8
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memory/2924-0-0x0000000074BE1000-0x0000000074BE2000-memory.dmpFilesize
4KB
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memory/2924-1-0x0000000074BE0000-0x000000007518B000-memory.dmpFilesize
5.7MB
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memory/2924-2-0x0000000074BE0000-0x000000007518B000-memory.dmpFilesize
5.7MB
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memory/2924-13-0x0000000074BE0000-0x000000007518B000-memory.dmpFilesize
5.7MB