ad861f41bb4a31ee778bf60cecf0a7bdd9c0cc91d5cc17775d15199c214fbccf

Analysis

max time kernel
15s
max time network
19s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
22/11/2024, 09:20

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General

Target

OsLock.exe
Size

385KB
MD5

675ea787630f596da0474830ffb49723
SHA1

c8e18cbc3cca1ded47eb5860a71b9f22d46409e1
SHA256

ad861f41bb4a31ee778bf60cecf0a7bdd9c0cc91d5cc17775d15199c214fbccf
SHA512

fa3c2c6edd3435bd16ec652c1738695cd1e8cdbd010b55fd856cefdbebd50552074d06e9b66860fae9c3a2f71ffe1076bb0227944b49286f05e1a3a4c871014d
SSDEEP

6144:Z1IE/9oydPc4IvjTZlyZsDDyr3rAUp48zUCpM69/KImQi/6ebkY:Z1vlc4IrTZlyGDc54

Score

10^/10

defense_evasion persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\""	OsLock.exe

Drops startup file 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	attrib.exe

Adds Run key to start application 2 TTPs 13 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_1 = "AWindowsService.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_2 = "taskhost.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_6 = "native.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsInstaller = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" -startup"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSEdgeUpdateX = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\""	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\System3264Wow = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" --init"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\OneDrive10293 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" /setup"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\WINDOWS = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\OsLock.exe\" --wininit"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_3 = "windowsx-c.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_4 = "System.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_5 = "_default64.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_7 = "ux-cryptor.exe"	OsLock.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\WIN32_8 = "crypt0rsx.exe"	OsLock.exe

Drops desktop.ini file(s) 45 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Documents\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\4TDQSVWU\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\SEGJVAZC\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\1U7Y9BT8\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\4KNYJNXZ\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini	attrib.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\5O2ZS8DL\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\BBWU148F\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\G0UQMQ1C\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	attrib.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3692679935-4019334568-335155002-1000\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\ADWO43R6\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	attrib.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	attrib.exe

Hide Artifacts: Hidden Files and Directories 1 TTPs 6 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
3004	cmd.exe
2456	cmd.exe
2720	cmd.exe
2836	cmd.exe
2928	cmd.exe
2872	cmd.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
2748	taskkill.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2792	OsLock.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2792	OsLock.exe
Token: SeDebugPrivilege	2748	taskkill.exe

Suspicious use of WriteProcessMemory 57 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 2836	2792	OsLock.exe	30
PID 2792 wrote to memory of 2836	2792	OsLock.exe	30
PID 2792 wrote to memory of 2836	2792	OsLock.exe	30
PID 2792 wrote to memory of 2720	2792	OsLock.exe	31
PID 2792 wrote to memory of 2720	2792	OsLock.exe	31
PID 2792 wrote to memory of 2720	2792	OsLock.exe	31
PID 2792 wrote to memory of 2456	2792	OsLock.exe	32
PID 2792 wrote to memory of 2456	2792	OsLock.exe	32
PID 2792 wrote to memory of 2456	2792	OsLock.exe	32
PID 2792 wrote to memory of 3004	2792	OsLock.exe	33
PID 2792 wrote to memory of 3004	2792	OsLock.exe	33
PID 2792 wrote to memory of 3004	2792	OsLock.exe	33
PID 2792 wrote to memory of 2872	2792	OsLock.exe	34
PID 2792 wrote to memory of 2872	2792	OsLock.exe	34
PID 2792 wrote to memory of 2872	2792	OsLock.exe	34
PID 2792 wrote to memory of 2928	2792	OsLock.exe	35
PID 2792 wrote to memory of 2928	2792	OsLock.exe	35
PID 2792 wrote to memory of 2928	2792	OsLock.exe	35
PID 2792 wrote to memory of 2748	2792	OsLock.exe	36
PID 2792 wrote to memory of 2748	2792	OsLock.exe	36
PID 2792 wrote to memory of 2748	2792	OsLock.exe	36
PID 3004 wrote to memory of 2712	3004	cmd.exe	44
PID 3004 wrote to memory of 2712	3004	cmd.exe	44
PID 3004 wrote to memory of 2712	3004	cmd.exe	44
PID 2872 wrote to memory of 2724	2872	cmd.exe	45
PID 2872 wrote to memory of 2724	2872	cmd.exe	45
PID 2872 wrote to memory of 2724	2872	cmd.exe	45
PID 2872 wrote to memory of 2832	2872	cmd.exe	46
PID 2872 wrote to memory of 2832	2872	cmd.exe	46
PID 2872 wrote to memory of 2832	2872	cmd.exe	46
PID 3004 wrote to memory of 2608	3004	cmd.exe	47
PID 3004 wrote to memory of 2608	3004	cmd.exe	47
PID 3004 wrote to memory of 2608	3004	cmd.exe	47
PID 2928 wrote to memory of 2596	2928	cmd.exe	48
PID 2928 wrote to memory of 2596	2928	cmd.exe	48
PID 2928 wrote to memory of 2596	2928	cmd.exe	48
PID 2836 wrote to memory of 2440	2836	cmd.exe	49
PID 2836 wrote to memory of 2440	2836	cmd.exe	49
PID 2836 wrote to memory of 2440	2836	cmd.exe	49
PID 2836 wrote to memory of 2600	2836	cmd.exe	50
PID 2836 wrote to memory of 2600	2836	cmd.exe	50
PID 2836 wrote to memory of 2600	2836	cmd.exe	50
PID 2456 wrote to memory of 2304	2456	cmd.exe	51
PID 2456 wrote to memory of 2304	2456	cmd.exe	51
PID 2456 wrote to memory of 2304	2456	cmd.exe	51
PID 2720 wrote to memory of 1660	2720	cmd.exe	52
PID 2720 wrote to memory of 1660	2720	cmd.exe	52
PID 2720 wrote to memory of 1660	2720	cmd.exe	52
PID 2456 wrote to memory of 2612	2456	cmd.exe	53
PID 2456 wrote to memory of 2612	2456	cmd.exe	53
PID 2456 wrote to memory of 2612	2456	cmd.exe	53
PID 2720 wrote to memory of 2252	2720	cmd.exe	54
PID 2720 wrote to memory of 2252	2720	cmd.exe	54
PID 2720 wrote to memory of 2252	2720	cmd.exe	54
PID 2928 wrote to memory of 1168	2928	cmd.exe	55
PID 2928 wrote to memory of 1168	2928	cmd.exe	55
PID 2928 wrote to memory of 1168	2928	cmd.exe	55

Views/modifies file attributes 1 TTPs 12 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2252	attrib.exe
2596	attrib.exe
2440	attrib.exe
2600	attrib.exe
1660	attrib.exe
2304	attrib.exe
1168	attrib.exe
2724	attrib.exe
2712	attrib.exe
2832	attrib.exe
2608	attrib.exe
2612	attrib.exe

C:\Users\Admin\AppData\Local\Temp\OsLock.exe
"C:\Users\Admin\AppData\Local\Temp\OsLock.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2792
- C:\Windows\system32\cmd.exe
  cmd.exe /c F: & attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2836
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2440
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2600
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%userprofile%\desktop"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:1660
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2252
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%systemdrive%\Users\Public\Desktop"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2456
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2304
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2612
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%userprofile%\downloads"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:3004
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2712
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2608
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%userprofile%\documents"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2872
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2724
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:2832
- C:\Windows\system32\cmd.exe
  cmd.exe /c cd "%userprofile%"&attrib +h +s +r +i /D /S * & echo [%RANDOM%] Упсик Твои файлы Зашифрованы! Пиши @N0TK4RMA 1>info-0v92.txt & attrib -h +s +r info-lox.txt
  2⤵
  - Hide Artifacts: Hidden Files and Directories
  - Suspicious use of WriteProcessMemory
  PID:2928
- - C:\Windows\system32\attrib.exe
    attrib +h +s +r +i /D /S *
    3⤵
    - Drops startup file
    - Drops desktop.ini file(s)
    - Views/modifies file attributes
    PID:2596
- - C:\Windows\system32\attrib.exe
    attrib -h +s +r info-lox.txt
    3⤵
    - Views/modifies file attributes
    PID:1168
- C:\Windows\system32\taskkill.exe
  taskkill.exe /im Explorer.exe /f
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:2748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\$unlocker_id.ux-cryptobytes

Filesize
6B

MD5
077e9aa9444bcf28541070cd97c81aa6

SHA1
2852e06b451e586b90203eae63c90c5d770214be

SHA256
859dba5497589ef1afb7e49275e3f3304ed1cad7412decbd56248002d904f0c2

SHA512
063d675dc30a33e99d63ac842b367ed35d0cd1e336058f4bfe8eb53e5e99797af196e311c7898935c7f8202c75cdda971187c1ec5f850f02780ac161c935291e

Download Submit
C:\Users\Admin\Desktop\info-0v92.txt

Filesize
56B

MD5
aeaa91ff5575a8dde8fba70e66040648

SHA1
917769bed9179d32dd0acd7114c2ddfd4ef4baf3

SHA256
83129a453e70013d996f9b1acc3ecf4a1e8199d934ccbaedd0d8ec80457bc8f6

SHA512
0eb06705ec330f018f5992a40b858c975cf236d86970f580e275218d1a6f9a145c2503a5b5f1918894cac43673729a94e2a42dfc4173cc6c99ac965f6b2b358b

Download Submit
memory/2792-0-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/2792-1-0x00000000009A0000-0x0000000000A06000-memory.dmp

Filesize
408KB

Download
memory/2792-2-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2792-6-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2792-10-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2792-18-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/2792-19-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2792-20-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2792-21-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download