44caliber | 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87

Analysis

max time kernel
145s
max time network
150s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
02/08/2024, 11:14

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General

Target
Loader V2.exe
Size 8.1MB
Sample240802-nb8q5awbpr
SHA256 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87
MD5 70a8a700260d1bf5d40214b4d16f2a4d
SHA1 888afda0f542f857c3627845abb17320c79348a3
SHA512 8d139e071d25106a30b3b00350fe08558bdaf884d039492611d90afd30c11ff08643560dc75ffaf7dafc0c53a96cf2b446239faf2fd8df9d0895d25b746d5d83
SSDEEP 196608:X7fP69w9dHnln76gtmUd74JVCbkQqeDDFloLRj/UVn5HIL6qG:Nvnln7RmUuJVuk0DDFWJCnVGs
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

44caliber xworm credential_access execution persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

147.185.221.20:13908
147.185.221.16:60401

Attributes

Install_directory
%AppData%
install_file
svhost.exe
telegram
https://api.telegram.org/bot7220907212:AAEOc5N7cpqGUVVvnWrzGHm8mdOrYN2e9mc/sendMessage?chat_id=6987872630

Extracted

Family

44caliber

https://discord.com/api/webhooks/1267250103538810911/_8BMipnmgDV4n-Uu_YmzeHrxrFFQPSAoBBDlwlDVhsDsk_31uQMADxZw-pq563wCO5KV

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber

Detect Xworm Payload 7 IoCs

resource	yara_rule
behavioral1/memory/2328-12-0x0000000000DF0000-0x0000000000E32000-memory.dmp	family_xworm
behavioral1/files/0x0008000000016848-11.dat	family_xworm
behavioral1/files/0x0008000000016aa4-17.dat	family_xworm
behavioral1/memory/3064-27-0x0000000001310000-0x0000000001326000-memory.dmp	family_xworm
behavioral1/memory/1616-129-0x00000000011C0000-0x00000000011D6000-memory.dmp	family_xworm
behavioral1/memory/2268-132-0x0000000000360000-0x00000000003A2000-memory.dmp	family_xworm
behavioral1/memory/2732-137-0x0000000000C60000-0x0000000000CA2000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
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
792	powershell.exe
1272	powershell.exe
448	powershell.exe
680	powershell.exe

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	injectdll.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svhost.lnk	injectdll.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	loaderr.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	loaderr.exe

Executes dropped EXE 8 IoCs

pid	Process
1244	Loader.exe
2328	injectdll.exe
3064	loaderr.exe
2764	fixer.exe
1616	svchost.exe
2268	svhost.exe
2840	svchost.exe
2732	svhost.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
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	injectdll.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\svchost.exe"	loaderr.exe

Looks up external IP address via web service 4 IoCs

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

flow	ioc
4	freegeoip.app
5	freegeoip.app
10	ip-api.com
11	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	fixer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	fixer.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1660	schtasks.exe
1220	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2764	fixer.exe
2764	fixer.exe
2764	fixer.exe
2764	fixer.exe
448	powershell.exe
680	powershell.exe
792	powershell.exe
1272	powershell.exe
2328	injectdll.exe
3064	loaderr.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	injectdll.exe
Token: SeDebugPrivilege	3064	loaderr.exe
Token: SeDebugPrivilege	2764	fixer.exe
Token: SeDebugPrivilege	448	powershell.exe
Token: SeDebugPrivilege	680	powershell.exe
Token: SeDebugPrivilege	792	powershell.exe
Token: SeDebugPrivilege	1272	powershell.exe
Token: SeDebugPrivilege	2328	injectdll.exe
Token: SeDebugPrivilege	3064	loaderr.exe
Token: SeDebugPrivilege	1616	svchost.exe
Token: SeDebugPrivilege	2268	svhost.exe
Token: SeDebugPrivilege	2732	svhost.exe
Token: SeDebugPrivilege	2840	svchost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2328	injectdll.exe
3064	loaderr.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 2952 wrote to memory of 1244	2952	Loader V2.exe	31
PID 2952 wrote to memory of 1244	2952	Loader V2.exe	31
PID 2952 wrote to memory of 1244	2952	Loader V2.exe	31
PID 2952 wrote to memory of 2328	2952	Loader V2.exe	32
PID 2952 wrote to memory of 2328	2952	Loader V2.exe	32
PID 2952 wrote to memory of 2328	2952	Loader V2.exe	32
PID 1244 wrote to memory of 3064	1244	Loader.exe	33
PID 1244 wrote to memory of 3064	1244	Loader.exe	33
PID 1244 wrote to memory of 3064	1244	Loader.exe	33
PID 1244 wrote to memory of 2764	1244	Loader.exe	34
PID 1244 wrote to memory of 2764	1244	Loader.exe	34
PID 1244 wrote to memory of 2764	1244	Loader.exe	34
PID 3064 wrote to memory of 448	3064	loaderr.exe	36
PID 3064 wrote to memory of 448	3064	loaderr.exe	36
PID 3064 wrote to memory of 448	3064	loaderr.exe	36
PID 3064 wrote to memory of 680	3064	loaderr.exe	38
PID 3064 wrote to memory of 680	3064	loaderr.exe	38
PID 3064 wrote to memory of 680	3064	loaderr.exe	38
PID 3064 wrote to memory of 792	3064	loaderr.exe	40
PID 3064 wrote to memory of 792	3064	loaderr.exe	40
PID 3064 wrote to memory of 792	3064	loaderr.exe	40
PID 3064 wrote to memory of 1272	3064	loaderr.exe	42
PID 3064 wrote to memory of 1272	3064	loaderr.exe	42
PID 3064 wrote to memory of 1272	3064	loaderr.exe	42
PID 2328 wrote to memory of 1660	2328	injectdll.exe	44
PID 2328 wrote to memory of 1660	2328	injectdll.exe	44
PID 2328 wrote to memory of 1660	2328	injectdll.exe	44
PID 3064 wrote to memory of 1220	3064	loaderr.exe	46
PID 3064 wrote to memory of 1220	3064	loaderr.exe	46
PID 3064 wrote to memory of 1220	3064	loaderr.exe	46
PID 292 wrote to memory of 1616	292	taskeng.exe	49
PID 292 wrote to memory of 1616	292	taskeng.exe	49
PID 292 wrote to memory of 1616	292	taskeng.exe	49
PID 292 wrote to memory of 2268	292	taskeng.exe	50
PID 292 wrote to memory of 2268	292	taskeng.exe	50
PID 292 wrote to memory of 2268	292	taskeng.exe	50
PID 292 wrote to memory of 2840	292	taskeng.exe	51
PID 292 wrote to memory of 2840	292	taskeng.exe	51
PID 292 wrote to memory of 2840	292	taskeng.exe	51
PID 292 wrote to memory of 2732	292	taskeng.exe	52
PID 292 wrote to memory of 2732	292	taskeng.exe	52
PID 292 wrote to memory of 2732	292	taskeng.exe	52

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Loader V2.exe
"C:\Users\Admin\AppData\Local\Temp\Loader V2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2952
- C:\Users\Admin\AppData\Roaming\Loader.exe
  "C:\Users\Admin\AppData\Roaming\Loader.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1244
- - C:\Users\Admin\AppData\Local\Temp\loaderr.exe
    "C:\Users\Admin\AppData\Local\Temp\loaderr.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3064
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\loaderr.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:448
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'loaderr.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:680
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\svchost.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:792
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1272
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Local\svchost.exe"
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:1220
- - C:\Users\Admin\AppData\Local\Temp\fixer.exe
    "C:\Users\Admin\AppData\Local\Temp\fixer.exe"
    3⤵
    - Executes dropped EXE
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2764
- C:\Users\Admin\AppData\Roaming\injectdll.exe
  "C:\Users\Admin\AppData\Roaming\injectdll.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2328
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svhost" /tr "C:\Users\Admin\AppData\Roaming\svhost.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1660

C:\Windows\system32\taskeng.exe
taskeng.exe {77D5313F-4D06-4F01-B02C-FC180701F88E} S-1-5-21-2958949473-3205530200-1453100116-1000:WHMFPZKA\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:292
- C:\Users\Admin\AppData\Local\svchost.exe
  C:\Users\Admin\AppData\Local\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1616
- C:\Users\Admin\AppData\Roaming\svhost.exe
  C:\Users\Admin\AppData\Roaming\svhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2268
- C:\Users\Admin\AppData\Local\svchost.exe
  C:\Users\Admin\AppData\Local\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2840
- C:\Users\Admin\AppData\Roaming\svhost.exe
  C:\Users\Admin\AppData\Roaming\svhost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2732

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

Process.txt

Path C:\ProgramData\44\Process.txt
Size 479B
SHA256 2467f5fd8b27692f3fa07ccae7fc1899f4d7e5522505961d0e515ebf6ecdae16
MD5 6349f613653b2c115a7fedda8a666a1d
SHA1 954cfe71d5634b4162693b7c216c7737a7a070b3
SHA512 36e85d64467ac291f7b986e8aeb82e4962a5f82bdd51f0c7743bcd37fa50baa7709b3ecaf9ebfbbd5f04cb3d1e048fd7113893fd89967ec4eb32b54d64586642
MD5 SHA1 SHA512

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fixer.exe

Path C:\Users\Admin\AppData\Local\Temp\fixer.exe
Size 274KB
SHA256 62e414e990e80c8203955b0e32948ddc64903b80a462c339f1babfb03e641204
MD5 88505913c2c75f796c9a021aab2d356d
SHA1 5b5c06998d3e200c21c77ea4efaeaecdc7344e78
SHA512 6fa46be04c2693ea164fe52ddf3cca0bdafd1ab34d8c0f1c2bf3d361c6042f45375343f59e9474ded6718f8177a4f7eb19fddccd95f7fbb87aad12358b2d6905
SSDEEP 6144:pf+BLtABPD34JMDSOxIWM8VzZTafTyMlI1D0rbz:B4GiWM8VzPh1Dwz
MD5 SHA1 SHA512 SSDEEP

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loaderr.exe

Path C:\Users\Admin\AppData\Local\Temp\loaderr.exe
Size 65KB
SHA256 aa40b9b929868482be1daae474d7c93426cd049f844c956865709ff8b7f240c2
MD5 95f8f28f5a8503461db6804cda9c4934
SHA1 81c0a30e498093d41948777135bbd407c7611cda
SHA512 5c3460372a6640a98dd1b1d34a03b951ec4a8942e9065475e982a207881f290aedc3b51fe73c0da4c527e222addd1de2be7ba541e82287e43e16fc544ab34461
SSDEEP 1536:A6se/GZ/ti8hRPQbUxEQICo6iKJgHOZ6VjRKzm:X/K/4+RobUGROIIm
MD5 SHA1 SHA512 SSDEEP

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Loader.exe

Path C:\Users\Admin\AppData\Roaming\Loader.exe
Size 7.6MB
SHA256 c0a2b824a0fd05854818bfb81b02bc6178db3f8519807b15d844580099428e1d
MD5 aa16f3774491b600121545a5f194cefc
SHA1 c872fe765ecff1dada8378ad8a12cd5cf0425219
SHA512 8b50e7c6eca25ecc2196fbfaf42079873e3c532a90e8d8b691fb594da3e067593f86f0d6488d0c314a27d78519f33fcbfb4532f811997891d55a47d582e1b3a8
SSDEEP 196608:8G46NbTO5uFqiXBIaqVCbB9+FsdH6HBiE555x:8G46N3O5uciXBvq09+wC/Hr
MD5 SHA1 SHA512 SSDEEP

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590aee7bdd69b59b.customDestinations-ms

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Size 7KB
SHA256 33b7a4b708ce64ded4f09120de7ec518c6efebebab1c75a704b46cdcab581d06
MD5 5f5115682f74b35a96601668299c4612
SHA1 71ec4b7d58c18b5db9364fa0cc105e42f7559303
SHA512 a7e982569911178e8f3d271264552ddecb195dc313a2d7eefaa28f2b9566ec3b141f95014a5f5c234adb3529a60d65b45a64c7e4564b5dd8b7471a902f2ec1b5
SSDEEP 96:gh6FCtPM8nnqvsqvJCwoHh6FCtPM8nnqvsEHyqvJCworhQLIVQHkF7p2XlUV4/x:Q6CPTUoB6CPTAHnorhzZF7p2n/x
MD5 SHA1 SHA512 SSDEEP

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injectdll.exe

Path C:\Users\Admin\AppData\Roaming\injectdll.exe
Size 244KB
SHA256 b481f1e0cfe25e5f19da0a0333c78661bf5c75c0b1c616ff4aaaa07aed31efd1
MD5 74ffb0d60d647dd6ad8d00c1bee48011
SHA1 4c8a707a33b35b78f374c66d59f9c2314c20b25f
SHA512 fc667f4560d6b19a9a4f37eb0e66c751eb348ffc0db69c7d0bd733dfd2df2dfdadc7b780cd93686350444cc14a54283bafe3afec611bcac3ad0239eda659f46c
SSDEEP 6144:JCYd3pbTTMPUhcX7elbKTua9bfF/H9d9n:JCYd3VTMP3X3u+
MD5 SHA1 SHA512 SSDEEP

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memory/448-98-0x000000001B640000-0x000000001B922000-memory.dmp

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memory/448-99-0x0000000001E60000-0x0000000001E68000-memory.dmp

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memory/680-106-0x0000000002290000-0x0000000002298000-memory.dmp

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memory/680-105-0x000000001B640000-0x000000001B922000-memory.dmp

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memory/1244-40-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

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memory/1244-93-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

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memory/1244-13-0x0000000000AF0000-0x0000000001284000-memory.dmp

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memory/1616-129-0x00000000011C0000-0x00000000011D6000-memory.dmp

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memory/2268-132-0x0000000000360000-0x00000000003A2000-memory.dmp

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memory/2328-12-0x0000000000DF0000-0x0000000000E32000-memory.dmp

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memory/2732-137-0x0000000000C60000-0x0000000000CA2000-memory.dmp

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memory/2764-32-0x0000000000BC0000-0x0000000000C0A000-memory.dmp

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memory/2952-1-0x0000000000DF0000-0x0000000001608000-memory.dmp

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memory/2952-0-0x000007FEF5B63000-0x000007FEF5B64000-memory.dmp

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memory/3064-27-0x0000000001310000-0x0000000001326000-memory.dmp

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