Analysis
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max time kernel
149s -
max time network
163s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
27-11-2022 15:28
Static task
static1
Behavioral task
behavioral1
Sample
d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe
Resource
win10v2004-20220812-en
General
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Target
d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe
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Size
820KB
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MD5
3199b720ea98e7c602cb1d98169afa03
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SHA1
56d38c4c331a9d91c793b1f55ddfec241f4a55d1
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SHA256
d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412
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SHA512
f16874d6a550048cd750cc21ebeec38b408a952b0116d66c5a4e56426169f3fb4516aad84ff0ca13d7d37bf8ad6a1c6052f3fee9c4d6c9287393f169d97c1217
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SSDEEP
24576:tKdOqixup2MsWOCCekDWLpKGsWXG+1imC+SN+:uO7xk9XOCJKWLQXfvnN+
Malware Config
Signatures
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Modifies WinLogon for persistence 2 TTPs 4 IoCs
Processes:
winlogon.execsrss.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe" winlogon.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe" winlogon.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe" csrss.exe Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\winlogon.exe" csrss.exe -
NirSoft MailPassView 5 IoCs
Password recovery tool for various email clients
Processes:
resource yara_rule behavioral1/memory/840-74-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral1/memory/840-75-0x0000000000411654-mapping.dmp MailPassView behavioral1/memory/840-78-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral1/memory/840-80-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral1/memory/840-87-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView -
NirSoft WebBrowserPassView 5 IoCs
Password recovery tool for various web browsers
Processes:
resource yara_rule behavioral1/memory/556-81-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral1/memory/556-82-0x0000000000442628-mapping.dmp WebBrowserPassView behavioral1/memory/556-85-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral1/memory/556-86-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral1/memory/556-88-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView -
Nirsoft 10 IoCs
Processes:
resource yara_rule behavioral1/memory/840-74-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral1/memory/840-75-0x0000000000411654-mapping.dmp Nirsoft behavioral1/memory/840-78-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral1/memory/840-80-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral1/memory/556-81-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral1/memory/556-82-0x0000000000442628-mapping.dmp Nirsoft behavioral1/memory/556-85-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral1/memory/556-86-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral1/memory/840-87-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral1/memory/556-88-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft -
Executes dropped EXE 2 IoCs
Processes:
winlogon.execsrss.exepid process 1784 winlogon.exe 1740 csrss.exe -
Loads dropped DLL 4 IoCs
Processes:
d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exewinlogon.exepid process 876 d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe 876 d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe 1784 winlogon.exe 1784 winlogon.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Uses the VBS compiler for execution 1 TTPs
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Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
Processes:
vbc.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts vbc.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 4 whatismyipaddress.com -
Suspicious use of SetThreadContext 2 IoCs
Processes:
winlogon.exedescription pid process target process PID 1784 set thread context of 840 1784 winlogon.exe vbc.exe PID 1784 set thread context of 556 1784 winlogon.exe vbc.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 47 IoCs
Processes:
csrss.exewinlogon.exepid process 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1784 winlogon.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe 1740 csrss.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
winlogon.execsrss.exedescription pid process Token: SeDebugPrivilege 1784 winlogon.exe Token: SeDebugPrivilege 1784 winlogon.exe Token: SeDebugPrivilege 1740 csrss.exe Token: SeDebugPrivilege 1740 csrss.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
winlogon.exepid process 1784 winlogon.exe -
Suspicious use of WriteProcessMemory 28 IoCs
Processes:
d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exewinlogon.exedescription pid process target process PID 876 wrote to memory of 1784 876 d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe winlogon.exe PID 876 wrote to memory of 1784 876 d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe winlogon.exe PID 876 wrote to memory of 1784 876 d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe winlogon.exe PID 876 wrote to memory of 1784 876 d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe winlogon.exe PID 1784 wrote to memory of 1740 1784 winlogon.exe csrss.exe PID 1784 wrote to memory of 1740 1784 winlogon.exe csrss.exe PID 1784 wrote to memory of 1740 1784 winlogon.exe csrss.exe PID 1784 wrote to memory of 1740 1784 winlogon.exe csrss.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 840 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe PID 1784 wrote to memory of 556 1784 winlogon.exe vbc.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe"C:\Users\Admin\AppData\Local\Temp\d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\winlogon.exe"C:\Users\Admin\AppData\Roaming\winlogon.exe"2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\csrss.exe"C:\Users\Admin\AppData\Roaming\csrss.exe" -reg "explorer.exe, C:\Users\Admin\AppData\Roaming\winlogon.exe" -proc 1784 C:\Users\Admin\AppData\Roaming\winlogon.exe3⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holdermail.txt"3⤵
- Accesses Microsoft Outlook accounts
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holderwb.txt"3⤵
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\holderwb.txtFilesize
2B
MD5f3b25701fe362ec84616a93a45ce9998
SHA1d62636d8caec13f04e28442a0a6fa1afeb024bbb
SHA256b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
SHA51298c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84
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C:\Users\Admin\AppData\Roaming\csrss.exeFilesize
820KB
MD53199b720ea98e7c602cb1d98169afa03
SHA156d38c4c331a9d91c793b1f55ddfec241f4a55d1
SHA256d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412
SHA512f16874d6a550048cd750cc21ebeec38b408a952b0116d66c5a4e56426169f3fb4516aad84ff0ca13d7d37bf8ad6a1c6052f3fee9c4d6c9287393f169d97c1217
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C:\Users\Admin\AppData\Roaming\csrss.exeFilesize
820KB
MD53199b720ea98e7c602cb1d98169afa03
SHA156d38c4c331a9d91c793b1f55ddfec241f4a55d1
SHA256d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412
SHA512f16874d6a550048cd750cc21ebeec38b408a952b0116d66c5a4e56426169f3fb4516aad84ff0ca13d7d37bf8ad6a1c6052f3fee9c4d6c9287393f169d97c1217
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C:\Users\Admin\AppData\Roaming\winlogon.exeFilesize
820KB
MD53199b720ea98e7c602cb1d98169afa03
SHA156d38c4c331a9d91c793b1f55ddfec241f4a55d1
SHA256d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412
SHA512f16874d6a550048cd750cc21ebeec38b408a952b0116d66c5a4e56426169f3fb4516aad84ff0ca13d7d37bf8ad6a1c6052f3fee9c4d6c9287393f169d97c1217
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C:\Users\Admin\AppData\Roaming\winlogon.exeFilesize
820KB
MD53199b720ea98e7c602cb1d98169afa03
SHA156d38c4c331a9d91c793b1f55ddfec241f4a55d1
SHA256d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412
SHA512f16874d6a550048cd750cc21ebeec38b408a952b0116d66c5a4e56426169f3fb4516aad84ff0ca13d7d37bf8ad6a1c6052f3fee9c4d6c9287393f169d97c1217
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\Users\Admin\AppData\Roaming\csrss.exeFilesize
820KB
MD53199b720ea98e7c602cb1d98169afa03
SHA156d38c4c331a9d91c793b1f55ddfec241f4a55d1
SHA256d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412
SHA512f16874d6a550048cd750cc21ebeec38b408a952b0116d66c5a4e56426169f3fb4516aad84ff0ca13d7d37bf8ad6a1c6052f3fee9c4d6c9287393f169d97c1217
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\Users\Admin\AppData\Roaming\csrss.exeFilesize
820KB
MD53199b720ea98e7c602cb1d98169afa03
SHA156d38c4c331a9d91c793b1f55ddfec241f4a55d1
SHA256d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412
SHA512f16874d6a550048cd750cc21ebeec38b408a952b0116d66c5a4e56426169f3fb4516aad84ff0ca13d7d37bf8ad6a1c6052f3fee9c4d6c9287393f169d97c1217
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\Users\Admin\AppData\Roaming\winlogon.exeFilesize
820KB
MD53199b720ea98e7c602cb1d98169afa03
SHA156d38c4c331a9d91c793b1f55ddfec241f4a55d1
SHA256d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412
SHA512f16874d6a550048cd750cc21ebeec38b408a952b0116d66c5a4e56426169f3fb4516aad84ff0ca13d7d37bf8ad6a1c6052f3fee9c4d6c9287393f169d97c1217
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\Users\Admin\AppData\Roaming\winlogon.exeFilesize
820KB
MD53199b720ea98e7c602cb1d98169afa03
SHA156d38c4c331a9d91c793b1f55ddfec241f4a55d1
SHA256d36dd418529e8e0f22e3923056a8212579adf6df4657c9dad26b21ca9cbe3412
SHA512f16874d6a550048cd750cc21ebeec38b408a952b0116d66c5a4e56426169f3fb4516aad84ff0ca13d7d37bf8ad6a1c6052f3fee9c4d6c9287393f169d97c1217
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memory/556-81-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/556-82-0x0000000000442628-mapping.dmp
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memory/556-88-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/556-86-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/556-85-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/840-78-0x0000000000400000-0x000000000041B000-memory.dmpFilesize
108KB
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memory/840-87-0x0000000000400000-0x000000000041B000-memory.dmpFilesize
108KB
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memory/840-80-0x0000000000400000-0x000000000041B000-memory.dmpFilesize
108KB
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memory/840-75-0x0000000000411654-mapping.dmp
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memory/840-74-0x0000000000400000-0x000000000041B000-memory.dmpFilesize
108KB
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memory/876-54-0x0000000075B11000-0x0000000075B13000-memory.dmpFilesize
8KB
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memory/876-63-0x0000000074780000-0x0000000074D2B000-memory.dmpFilesize
5.7MB
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memory/876-56-0x0000000074780000-0x0000000074D2B000-memory.dmpFilesize
5.7MB
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memory/876-55-0x0000000074780000-0x0000000074D2B000-memory.dmpFilesize
5.7MB
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memory/1740-73-0x0000000074780000-0x0000000074D2B000-memory.dmpFilesize
5.7MB
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memory/1740-72-0x0000000074780000-0x0000000074D2B000-memory.dmpFilesize
5.7MB
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memory/1740-68-0x0000000000000000-mapping.dmp
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memory/1784-65-0x0000000074780000-0x0000000074D2B000-memory.dmpFilesize
5.7MB
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memory/1784-79-0x0000000000526000-0x0000000000537000-memory.dmpFilesize
68KB
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memory/1784-59-0x0000000000000000-mapping.dmp
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memory/1784-64-0x0000000074780000-0x0000000074D2B000-memory.dmpFilesize
5.7MB
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memory/1784-90-0x0000000000526000-0x0000000000537000-memory.dmpFilesize
68KB