dcrat | 7e1ddc85e590fb78e99330fb3ae333777794de8013c5436bb7b1bb4b2d3dd54d

Analysis

max time kernel
149s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
11/04/2026, 09:45

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General

Target
0fd6d35a85513c2e86a0a94ace158b7a.exe
Size 8.0MB
Sample260411-lrfdeaex5w
SHA256 7e1ddc85e590fb78e99330fb3ae333777794de8013c5436bb7b1bb4b2d3dd54d
MD5 0fd6d35a85513c2e86a0a94ace158b7a
SHA1 cdff3c8d7fda3735603d2e82879d493488076aee
SHA512 421f037070639587271ec9f67b403070b1c732ade0fbc2bb77170e3a31da26c714fb9c194b7c0be3fdf99aba9e97d76c09c2cbc7188be0c566f4781213d33fe0
SSDEEP 12288:+poIY///1UFuwYp4bLJXmr8j9+9rOTXw4sXWS7TVhNa4iK5QeRG3REA:pIY/36/Nm4xiMXwZrNniKVG32A
TLSH
T12386E0F6DBC97421C0D78C3F95391D1668909C8E2CCCB726DA83BE5C96732A91C97263
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution dcrat infostealer persistence rat

Malware Config

Signatures

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x000800000002447b-6.dat	dcrat
behavioral1/files/0x0007000000024481-25.dat	dcrat
behavioral1/memory/6024-27-0x0000000000070000-0x0000000000146000-memory.dmp	dcrat

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat
Dcrat family
dcrat

Process spawned unexpected child process 18 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5032	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3996	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4104	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5328	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4944	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3116	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1868	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2324	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5740	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2104	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	60	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5104	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3784	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1200	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1404	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2660	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1684	5584	schtasks.exe	91
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4904	5584	schtasks.exe	91

Checks computer location settings 2 TTPs 4 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1609746302-1884177235-1125644204-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1609746302-1884177235-1125644204-1000\Control Panel\International\Geo\Nation	expandera.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1609746302-1884177235-1125644204-1000\Control Panel\International\Geo\Nation	0fd6d35a85513c2e86a0a94ace158b7a.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1609746302-1884177235-1125644204-1000\Control Panel\International\Geo\Nation	Expandera.exe

Executes dropped EXE 8 IoCs

pid	Process
4624	Expandera.exe
6024	expandera.exe
5884	RuntimeBroker.exe
1680	WUDFHost.exe
3868	spoolsv.exe
2760	wininit.exe
4920	sihost.exe
4872	SearchApp.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\DESIGNER\RuntimeBroker.exe	expandera.exe
File created	C:\Program Files\Common Files\DESIGNER\9e8d7a4ca61bd9	expandera.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Globalization\ICU\sihost.exe	expandera.exe
File created	C:\Windows\Globalization\ICU\66fc9ff0ee96c2	expandera.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Expandera.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1609746302-1884177235-1125644204-1000_Classes\Local Settings	Expandera.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3784	schtasks.exe
1200	schtasks.exe
3996	schtasks.exe
4944	schtasks.exe
1868	schtasks.exe
2104	schtasks.exe
60	schtasks.exe
4904	schtasks.exe
1404	schtasks.exe
4104	schtasks.exe
5328	schtasks.exe
5104	schtasks.exe
1684	schtasks.exe
5032	schtasks.exe
3116	schtasks.exe
2324	schtasks.exe
5740	schtasks.exe
2660	schtasks.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
6024	expandera.exe
6024	expandera.exe
6024	expandera.exe
6024	expandera.exe
6024	expandera.exe
6024	expandera.exe
6024	expandera.exe
6024	expandera.exe
6024	expandera.exe
6024	expandera.exe
6024	expandera.exe
3868	spoolsv.exe
3868	spoolsv.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	6024	expandera.exe
Token: SeDebugPrivilege	3868	spoolsv.exe
Token: SeDebugPrivilege	2760	wininit.exe
Token: SeDebugPrivilege	5884	RuntimeBroker.exe
Token: SeDebugPrivilege	1680	WUDFHost.exe
Token: SeDebugPrivilege	4920	sihost.exe
Token: SeDebugPrivilege	4872	SearchApp.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4744 wrote to memory of 4624	4744	0fd6d35a85513c2e86a0a94ace158b7a.exe	86
PID 4624 wrote to memory of 5724	4624	Expandera.exe	87
PID 5724 wrote to memory of 4420	5724	WScript.exe	88
PID 4420 wrote to memory of 6024	4420	cmd.exe	90
PID 6024 wrote to memory of 4920	6024	expandera.exe	119

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\0fd6d35a85513c2e86a0a94ace158b7a.exe
"C:\Users\Admin\AppData\Local\Temp\0fd6d35a85513c2e86a0a94ace158b7a.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4744
- C:\Users\Admin\AppData\Local\Temp\Expandera.exe
  "C:\Users\Admin\AppData\Local\Temp\Expandera.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4624
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\expandera.exe\TZhyvvqK6MCcP9VF8.vbe"
    3⤵
    - Checks computer location settings
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:5724
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\expandera.exe\XtwTCyITlVr4MO.bat" "
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4420
    - - C:\expandera.exe\expandera.exe
        
        "C:\expandera.exe\expandera.exe"
        5⤵
        Checks computer location settings
        Executes dropped EXE
        Drops file in Program Files directory
        Drops file in Windows directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:6024
      - C:\Windows\Globalization\ICU\sihost.exe
        
        "C:\Windows\Globalization\ICU\sihost.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:4920

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WUDFHostW" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\WUDFHost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5032

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WUDFHost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\WUDFHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3996

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WUDFHostW" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\WUDFHost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5328

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4944

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3116

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1868

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2324

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5740

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\expandera.exe\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\expandera.exe\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\expandera.exe\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:60

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Program Files\Common Files\DESIGNER\RuntimeBroker.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3784

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\Common Files\DESIGNER\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1200

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\Program Files\Common Files\DESIGNER\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1404

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 8 /tr "'C:\Windows\Globalization\ICU\sihost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2660

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\Globalization\ICU\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1684

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 6 /tr "'C:\Windows\Globalization\ICU\sihost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4904

C:\Program Files\Common Files\DESIGNER\RuntimeBroker.exe
"C:\Program Files\Common Files\DESIGNER\RuntimeBroker.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5884

C:\Recovery\WindowsRE\WUDFHost.exe
"C:\Recovery\WindowsRE\WUDFHost.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1680

C:\Recovery\WindowsRE\spoolsv.exe
"C:\Recovery\WindowsRE\spoolsv.exe"
1⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3868

C:\expandera.exe\wininit.exe
"C:\expandera.exe\wininit.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2760

C:\Recovery\WindowsRE\SearchApp.exe
"C:\Recovery\WindowsRE\SearchApp.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4872

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

SearchApp.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\SearchApp.exe.log
Size 1KB
SHA256 ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924
MD5 baf55b95da4a601229647f25dad12878
SHA1 abc16954ebfd213733c4493fc1910164d825cac8
SHA512 24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545
TLSH
T1B521CD712376B1D889163F422C5D2A8007BF0335BA50DE1CB9A9725ED9260171F222F3
MD5 SHA1 SHA512 TLSH

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Expandera.exe

Path C:\Users\Admin\AppData\Local\Temp\Expandera.exe
Size 1.1MB
SHA256 3abcda97d77efca436ad4b41d12740ebd93adc5fbeecc913514b2768cc3a0109
MD5 c05853930cb54d187e7519b9f4034dec
SHA1 10c68ae8acc78cd401aa274a8eec8aa5444eaf37
SHA512 e3d6245fdf8854ec4e6c7381facd89bd8a6e928e351bbd08d0dc00a6589be6d6b621445ba512889a423ee89fb720c928a140b381c4214f3ead148b6f8a5e9d06
SSDEEP 24576:U2G/nvxW3Ww0tEIgjUATGaCfg3bq6rVOvgNO5/eNngKT8:UbA30MUCMog
TLSH
T1324549417E44CA22F0591633C2FF450447B4AC912AA6E72B7EBE77AD55123A37C0DACB
MD5 SHA1 SHA512 SSDEEP TLSH

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TZhyvvqK6MCcP9VF8.vbe

Path C:\expandera.exe\TZhyvvqK6MCcP9VF8.vbe
Size 215B
SHA256 79ff39811a1f2094bc433dc6848e81784db4f30efe559ebaf2efada98cf3ccc2
MD5 94e6854bb1fb5e21ae02d871b9487380
SHA1 ae8dfcb9fbf2f88a480529201d4e4c010014d2f5
SHA512 cf41e2b3ee1ed4f2a8c7bc9ce2e64e8ed2db20650eae30f5b318d617169daf0a90c7c754c2b93726ecabe1e30eeb08086f758cb703ee2172eb2ce387debb9342
TLSH
T101D0A7D89912E2A4DD1A8D8F8315D4284E916AF946504B8A44949809E14255D346C766
MD5 SHA1 SHA512 TLSH

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XtwTCyITlVr4MO.bat

Path C:\expandera.exe\XtwTCyITlVr4MO.bat
Size 43B
SHA256 9bbde6f001761ce148ec58771e90e881a1197425133e56d228177c0966799d7a
MD5 158bcfc16265a0a8ca9447ea510cdcc4
SHA1 d3c6a3f01b7adddf546e275e44e74aaa1c27c5fa
SHA512 02cc4fc3ad69705a1b7c9bf176a89437fa3be882946550dfb5d0baf8d9d004b4522ff651991208410993a30a0e2786bb5d0f96bc192d1a119e03d4652bfa73ed
MD5 SHA1 SHA512

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expandera.exe

Path C:\expandera.exe\expandera.exe
Size 827KB
SHA256 cb1e0758c7c113ca123d42c38bf7e0f8aba0c0afa9bb61d57fd90a5610ff1bfc
MD5 8fbca6401a3a7981c37e0e5625db41a4
SHA1 a4c3b6ffab12c02835c31567054eeb7c602b1fe6
SHA512 98dfcd43c17c379d9a5a39b433bee7ea6a4da6459f627ce2146369718efe29feda89736b92609900cf6fffcc61309e707d519459ef0d4f51b8bef7e5860391bb
SSDEEP 12288:C64dtn4g8qUATGaRfvcfg33bq6rV+1jlBfZ7EMH5gaEO5/eNa4gK5ye:SIgjUATGaCfg3bq6rVOvgNO5/eNngKT
TLSH
T1C005F7427E44CE12F0491233C2FF454847B0A9916AA6E72B7EBE77AD55123A73C0D9CB
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4624-19-0x0000000002FF0000-0x00000000030D3000-memory.dmp

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memory/4744-0-0x0000000000240000-0x0000000000324000-memory.dmp

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memory/4744-1-0x000000001B100000-0x000000001B110000-memory.dmp

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memory/5724-21-0x0000000000A60000-0x0000000000B43000-memory.dmp

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memory/5724-23-0x00000000034E0000-0x00000000034FC000-memory.dmp

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memory/5724-22-0x00000000034C0000-0x00000000034DF000-memory.dmp

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memory/6024-27-0x0000000000070000-0x0000000000146000-memory.dmp

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