Analysis
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max time kernel
190s -
max time network
240s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
24-11-2022 22:43
Behavioral task
behavioral1
Sample
f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exe
Resource
win10v2004-20221111-en
General
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Target
f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exe
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Size
108KB
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MD5
3f093d8d048a12f3624fa04a94c4db1c
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SHA1
1db63eac595c764dd5c9e8e628c9e62f866e26e5
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SHA256
f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76
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SHA512
f5a72fa4dfac83e7a2186a84e445074c656fbba7d35d93cd90c1b5f5e86f731eff64c41289d041193fd62662f5b6f2bbedbd3d6316360f4004a892ba7d237d4d
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SSDEEP
1536:6C7bcfsbgxwvFahJKTLKRMp41VPmuvQbDJZp9iXp3qB40qnFT0:d9bgxwdahMLkYmmpblZp9iZv0qn
Malware Config
Signatures
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Executes dropped EXE 2 IoCs
Processes:
LocalegrGuJkBCI.execsrss.exepid process 2272 LocalegrGuJkBCI.exe 4340 csrss.exe -
Modifies Windows Firewall 1 TTPs 1 IoCs
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Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exeLocalegrGuJkBCI.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exe Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation LocalegrGuJkBCI.exe -
Drops startup file 2 IoCs
Processes:
csrss.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e101a39ab5de59589562aa0ff3295ba5.exe csrss.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e101a39ab5de59589562aa0ff3295ba5.exe csrss.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
csrss.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e101a39ab5de59589562aa0ff3295ba5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss.exe\" .." csrss.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\e101a39ab5de59589562aa0ff3295ba5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss.exe\" .." csrss.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 30 IoCs
Processes:
csrss.exepid process 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe 4340 csrss.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
csrss.exedescription pid process Token: SeDebugPrivilege 4340 csrss.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exeLocalegrGuJkBCI.execsrss.exedescription pid process target process PID 1628 wrote to memory of 2272 1628 f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exe LocalegrGuJkBCI.exe PID 1628 wrote to memory of 2272 1628 f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exe LocalegrGuJkBCI.exe PID 1628 wrote to memory of 2272 1628 f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exe LocalegrGuJkBCI.exe PID 2272 wrote to memory of 4340 2272 LocalegrGuJkBCI.exe csrss.exe PID 2272 wrote to memory of 4340 2272 LocalegrGuJkBCI.exe csrss.exe PID 2272 wrote to memory of 4340 2272 LocalegrGuJkBCI.exe csrss.exe PID 4340 wrote to memory of 3692 4340 csrss.exe netsh.exe PID 4340 wrote to memory of 3692 4340 csrss.exe netsh.exe PID 4340 wrote to memory of 3692 4340 csrss.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exe"C:\Users\Admin\AppData\Local\Temp\f92ba9ee6557729cd10ecf39309656c92430adbe44b2f8846718fd6c3a7f6b76.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\LocalegrGuJkBCI.exe"C:\Users\Admin\AppData\LocalegrGuJkBCI.exe"2⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\csrss.exe"C:\Users\Admin\AppData\Local\Temp\csrss.exe"3⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\csrss.exe" "csrss.exe" ENABLE4⤵
- Modifies Windows Firewall
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\csrss.exeFilesize
27KB
MD575f46d846f14b5561b0dc0078c431530
SHA123ef45b0545b335afb4e2055fea3aa8f1a17987b
SHA2567458c62c04b5712256370a2683e0607fab8249e558681061d12fe10b03b643bb
SHA51222488cf286c9bb74163ee725ccce37b2f4136ed8a1197b3b629bd5542e36721d4499874f0d1bc4ab107fdba50f4c05a03bc40268f748a0be6c43d9379914a2de
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C:\Users\Admin\AppData\Local\Temp\csrss.exeFilesize
27KB
MD575f46d846f14b5561b0dc0078c431530
SHA123ef45b0545b335afb4e2055fea3aa8f1a17987b
SHA2567458c62c04b5712256370a2683e0607fab8249e558681061d12fe10b03b643bb
SHA51222488cf286c9bb74163ee725ccce37b2f4136ed8a1197b3b629bd5542e36721d4499874f0d1bc4ab107fdba50f4c05a03bc40268f748a0be6c43d9379914a2de
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C:\Users\Admin\AppData\LocalegrGuJkBCI.exeFilesize
27KB
MD575f46d846f14b5561b0dc0078c431530
SHA123ef45b0545b335afb4e2055fea3aa8f1a17987b
SHA2567458c62c04b5712256370a2683e0607fab8249e558681061d12fe10b03b643bb
SHA51222488cf286c9bb74163ee725ccce37b2f4136ed8a1197b3b629bd5542e36721d4499874f0d1bc4ab107fdba50f4c05a03bc40268f748a0be6c43d9379914a2de
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C:\Users\Admin\AppData\LocalegrGuJkBCI.exeFilesize
27KB
MD575f46d846f14b5561b0dc0078c431530
SHA123ef45b0545b335afb4e2055fea3aa8f1a17987b
SHA2567458c62c04b5712256370a2683e0607fab8249e558681061d12fe10b03b643bb
SHA51222488cf286c9bb74163ee725ccce37b2f4136ed8a1197b3b629bd5542e36721d4499874f0d1bc4ab107fdba50f4c05a03bc40268f748a0be6c43d9379914a2de
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memory/1628-132-0x00007FFA10690000-0x00007FFA110C6000-memory.dmpFilesize
10.2MB
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memory/2272-133-0x0000000000000000-mapping.dmp
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memory/2272-136-0x0000000074DF0000-0x00000000753A1000-memory.dmpFilesize
5.7MB
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memory/2272-141-0x0000000074DF0000-0x00000000753A1000-memory.dmpFilesize
5.7MB
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memory/3692-140-0x0000000000000000-mapping.dmp
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memory/4340-137-0x0000000000000000-mapping.dmp
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memory/4340-142-0x0000000074DF0000-0x00000000753A1000-memory.dmpFilesize
5.7MB
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memory/4340-143-0x0000000074DF0000-0x00000000753A1000-memory.dmpFilesize
5.7MB