umbral | 68df11ba8f6db56ddf29a0ef7ea38663342375e36abb0b2924fbc974acf7b15f

Analysis

max time kernel
137s
max time network
132s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
22/08/2024, 01:21

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General

Target
20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
Size 506KB
Sample240822-bqx7qa1dnb
SHA256 20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd
MD5 6f801049dc7c819dc80f015947962f47
SHA1 427c1556b90aa70d3d1b3314bc88325ea30f4687
SHA512 d6dd99f5dcaa1717d36ab6f2ad17264416114b77750bfe90901f37bfabbd5ba2f54f43f356cf1e4db6376eb2b0a8850502ce6535f546c59799961241333bfe2e
SSDEEP 6144:uloZM9rIkd8g+EtXHkv/iD4CGYhfVeGJdMFXSy3v7Igb8e1mSiZ:4oZOL+EP8CGYhfVeGJdMFXSy3vZUZ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2392-1-0x000001D91BDC0000-0x000001D91BE46000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4732	powershell.exe
3328	powershell.exe
4024	powershell.exe
2360	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
22	discord.com
24	discord.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
20	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2052	cmd.exe
3480	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4356	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3480	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4732	powershell.exe
4732	powershell.exe
3328	powershell.exe
3328	powershell.exe
4024	powershell.exe
4024	powershell.exe
1100	powershell.exe
1100	powershell.exe
2360	powershell.exe
2360	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
Token: SeDebugPrivilege	4732	powershell.exe
Token: SeDebugPrivilege	3328	powershell.exe
Token: SeDebugPrivilege	4024	powershell.exe
Token: SeDebugPrivilege	1100	powershell.exe
Token: SeIncreaseQuotaPrivilege	2648	wmic.exe
Token: SeSecurityPrivilege	2648	wmic.exe
Token: SeTakeOwnershipPrivilege	2648	wmic.exe
Token: SeLoadDriverPrivilege	2648	wmic.exe
Token: SeSystemProfilePrivilege	2648	wmic.exe
Token: SeSystemtimePrivilege	2648	wmic.exe
Token: SeProfSingleProcessPrivilege	2648	wmic.exe
Token: SeIncBasePriorityPrivilege	2648	wmic.exe
Token: SeCreatePagefilePrivilege	2648	wmic.exe
Token: SeBackupPrivilege	2648	wmic.exe
Token: SeRestorePrivilege	2648	wmic.exe
Token: SeShutdownPrivilege	2648	wmic.exe
Token: SeDebugPrivilege	2648	wmic.exe
Token: SeSystemEnvironmentPrivilege	2648	wmic.exe
Token: SeRemoteShutdownPrivilege	2648	wmic.exe
Token: SeUndockPrivilege	2648	wmic.exe
Token: SeManageVolumePrivilege	2648	wmic.exe
Token: 33	2648	wmic.exe
Token: 34	2648	wmic.exe
Token: 35	2648	wmic.exe
Token: 36	2648	wmic.exe
Token: SeIncreaseQuotaPrivilege	2648	wmic.exe
Token: SeSecurityPrivilege	2648	wmic.exe
Token: SeTakeOwnershipPrivilege	2648	wmic.exe
Token: SeLoadDriverPrivilege	2648	wmic.exe
Token: SeSystemProfilePrivilege	2648	wmic.exe
Token: SeSystemtimePrivilege	2648	wmic.exe
Token: SeProfSingleProcessPrivilege	2648	wmic.exe
Token: SeIncBasePriorityPrivilege	2648	wmic.exe
Token: SeCreatePagefilePrivilege	2648	wmic.exe
Token: SeBackupPrivilege	2648	wmic.exe
Token: SeRestorePrivilege	2648	wmic.exe
Token: SeShutdownPrivilege	2648	wmic.exe
Token: SeDebugPrivilege	2648	wmic.exe
Token: SeSystemEnvironmentPrivilege	2648	wmic.exe
Token: SeRemoteShutdownPrivilege	2648	wmic.exe
Token: SeUndockPrivilege	2648	wmic.exe
Token: SeManageVolumePrivilege	2648	wmic.exe
Token: 33	2648	wmic.exe
Token: 34	2648	wmic.exe
Token: 35	2648	wmic.exe
Token: 36	2648	wmic.exe
Token: SeIncreaseQuotaPrivilege	544	wmic.exe
Token: SeSecurityPrivilege	544	wmic.exe
Token: SeTakeOwnershipPrivilege	544	wmic.exe
Token: SeLoadDriverPrivilege	544	wmic.exe
Token: SeSystemProfilePrivilege	544	wmic.exe
Token: SeSystemtimePrivilege	544	wmic.exe
Token: SeProfSingleProcessPrivilege	544	wmic.exe
Token: SeIncBasePriorityPrivilege	544	wmic.exe
Token: SeCreatePagefilePrivilege	544	wmic.exe
Token: SeBackupPrivilege	544	wmic.exe
Token: SeRestorePrivilege	544	wmic.exe
Token: SeShutdownPrivilege	544	wmic.exe
Token: SeDebugPrivilege	544	wmic.exe
Token: SeSystemEnvironmentPrivilege	544	wmic.exe
Token: SeRemoteShutdownPrivilege	544	wmic.exe
Token: SeUndockPrivilege	544	wmic.exe
Token: SeManageVolumePrivilege	544	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2392 wrote to memory of 3480	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	87
PID 2392 wrote to memory of 3480	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	87
PID 2392 wrote to memory of 4732	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	89
PID 2392 wrote to memory of 4732	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	89
PID 2392 wrote to memory of 3328	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	91
PID 2392 wrote to memory of 3328	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	91
PID 2392 wrote to memory of 4024	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	93
PID 2392 wrote to memory of 4024	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	93
PID 2392 wrote to memory of 1100	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	95
PID 2392 wrote to memory of 1100	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	95
PID 2392 wrote to memory of 2648	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	97
PID 2392 wrote to memory of 2648	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	97
PID 2392 wrote to memory of 544	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	100
PID 2392 wrote to memory of 544	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	100
PID 2392 wrote to memory of 2272	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	102
PID 2392 wrote to memory of 2272	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	102
PID 2392 wrote to memory of 2360	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	104
PID 2392 wrote to memory of 2360	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	104
PID 2392 wrote to memory of 4356	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	106
PID 2392 wrote to memory of 4356	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	106
PID 2392 wrote to memory of 2052	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	110
PID 2392 wrote to memory of 2052	2392	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	110
PID 2052 wrote to memory of 3480	2052	cmd.exe	112
PID 2052 wrote to memory of 3480	2052	cmd.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3480	attrib.exe

C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
"C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe"
  2⤵
  - Views/modifies file attributes
  PID:3480
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4732
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3328
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4024
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1100
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2648
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:544
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2272
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:2360
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4356
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3480

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438
MD5 cadef9abd087803c630df65264a6c81c
SHA1 babbf3636c347c8727c35f3eef2ee643dbcc4bd2
SHA512 7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705
MD5 c9b6705519e1eef08f86c4ba5f4286f3
SHA1 6c6b179e452ecee2673a1d4fe128f1c06f70577f
SHA512 6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc
MD5 276798eeb29a49dc6e199768bc9c2e71
SHA1 5fdc8ccb897ac2df7476fbb07517aca5b7a6205b
SHA512 0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 af239bf9ef4f2ad19422b5ee77faa2465d9a79aaabaa19557ff08123c0357227
MD5 df90d53775b01ed0875c81dca33a0c35
SHA1 c48dedb031902c3b73bd0f65c3a20d30ef02042a
SHA512 68d88f8c93e42f3c7b600da67d676e46289aab0601604856d6e97bd120bffbdbfea3ac56d009c5fcbd42cc466bf1c1d3895f57876adc9e24ce440b554db8c7d6
MD5 SHA1 SHA512

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__PSScriptPolicyTest_gk3qo40q.1dr.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gk3qo40q.1dr.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/2392-71-0x000001D91DC80000-0x000001D91DC8A000-memory.dmp

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memory/2392-35-0x000001D91DBF0000-0x000001D91DC0E000-memory.dmp

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memory/2392-92-0x00007FFD088B0000-0x00007FFD09371000-memory.dmp

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memory/2392-88-0x00007FFD088B0000-0x00007FFD09371000-memory.dmp

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memory/2392-2-0x00007FFD088B0000-0x00007FFD09371000-memory.dmp

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memory/2392-33-0x000001D9365B0000-0x000001D936626000-memory.dmp

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memory/2392-34-0x000001D91DC20000-0x000001D91DC70000-memory.dmp

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memory/2392-87-0x00007FFD088B3000-0x00007FFD088B5000-memory.dmp

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memory/2392-1-0x000001D91BDC0000-0x000001D91BE46000-memory.dmp

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memory/2392-0-0x00007FFD088B3000-0x00007FFD088B5000-memory.dmp

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memory/2392-72-0x000001D936760000-0x000001D936772000-memory.dmp

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memory/4732-14-0x00007FFD088B0000-0x00007FFD09371000-memory.dmp

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memory/4732-11-0x000001E2FCCA0000-0x000001E2FCCC2000-memory.dmp

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memory/4732-15-0x00007FFD088B0000-0x00007FFD09371000-memory.dmp

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memory/4732-3-0x00007FFD088B0000-0x00007FFD09371000-memory.dmp

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memory/4732-18-0x00007FFD088B0000-0x00007FFD09371000-memory.dmp

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