44caliber | 14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87

Analysis

max time kernel
150s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240730-en
resource tags

arch:x64arch:x86image:win11-20240730-enlocale:en-usos:windows11-21h2-x64system
submitted
02-08-2024 11:14

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General

Target

Loader V2.exe
Size

8.1MB
MD5

70a8a700260d1bf5d40214b4d16f2a4d
SHA1

888afda0f542f857c3627845abb17320c79348a3
SHA256

14430e71914c83f8d1de8e66caa39d07ab782efb662245fb9eff6aa9fca7ce87
SHA512

8d139e071d25106a30b3b00350fe08558bdaf884d039492611d90afd30c11ff08643560dc75ffaf7dafc0c53a96cf2b446239faf2fd8df9d0895d25b746d5d83
SSDEEP

196608:X7fP69w9dHnln76gtmUd74JVCbkQqeDDFloLRj/UVn5HIL6qG:Nvnln7RmUuJVuk0DDFWJCnVGs

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 4 IoCs

Processes:

resource	yara_rule
behavioral4/files/0x000100000002aaac-17.dat	family_xworm
behavioral4/memory/5192-25-0x0000000000580000-0x00000000005C2000-memory.dmp	family_xworm
behavioral4/files/0x000400000002aa9c-33.dat	family_xworm
behavioral4/memory/4856-48-0x0000000000330000-0x0000000000346000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
5468	powershell.exe
4516	powershell.exe
4920	powershell.exe
1176	powershell.exe

Drops startup file 4 IoCs

Processes:

loaderr.exeinjectdll.exe

description	ioc	Process
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
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

Executes dropped EXE 7 IoCs

Processes:

Loader.exeinjectdll.exeloaderr.exefixer.exesvhost.exesvchost.exesvhost.exe

pid	Process
2104	Loader.exe
5192	injectdll.exe
4856	loaderr.exe
2160	fixer.exe
5860	svhost.exe
108	svchost.exe
6108	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

Processes:

injectdll.exeloaderr.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3803380633-1574714764-2315899217-1000\Software\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\AppData\\Roaming\\svhost.exe"	injectdll.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3803380633-1574714764-2315899217-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\svchost.exe"	loaderr.exe

Looks up external IP address via web service 3 IoCs

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

Processes:

flow	ioc
1	freegeoip.app
1	ip-api.com
2	freegeoip.app

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

Processes:

fixer.exe

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

Processes:

schtasks.exeschtasks.exe

pid	Process
2844	schtasks.exe
4264	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

fixer.exepowershell.exepowershell.exeinjectdll.exepowershell.exepowershell.exeloaderr.exe

pid	Process
2160	fixer.exe
2160	fixer.exe
2160	fixer.exe
2160	fixer.exe
4516	powershell.exe
4516	powershell.exe
4920	powershell.exe
4920	powershell.exe
5192	injectdll.exe
1176	powershell.exe
1176	powershell.exe
5468	powershell.exe
5468	powershell.exe
4856	loaderr.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

Processes:

injectdll.exeloaderr.exefixer.exepowershell.exepowershell.exepowershell.exepowershell.exesvhost.exesvchost.exesvhost.exe

description	pid	Process
Token: SeDebugPrivilege	5192	injectdll.exe
Token: SeDebugPrivilege	4856	loaderr.exe
Token: SeDebugPrivilege	2160	fixer.exe
Token: SeDebugPrivilege	4516	powershell.exe
Token: SeDebugPrivilege	4920	powershell.exe
Token: SeDebugPrivilege	5192	injectdll.exe
Token: SeDebugPrivilege	1176	powershell.exe
Token: SeDebugPrivilege	5468	powershell.exe
Token: SeDebugPrivilege	4856	loaderr.exe
Token: SeDebugPrivilege	5860	svhost.exe
Token: SeDebugPrivilege	108	svchost.exe
Token: SeDebugPrivilege	6108	svhost.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

injectdll.exeloaderr.exe

pid	Process
5192	injectdll.exe
4856	loaderr.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

Loader V2.exeLoader.exeloaderr.exeinjectdll.exe

description	pid	Process	procid_target
PID 5832 wrote to memory of 2104	5832	Loader V2.exe	82
PID 5832 wrote to memory of 2104	5832	Loader V2.exe	82
PID 5832 wrote to memory of 5192	5832	Loader V2.exe	83
PID 5832 wrote to memory of 5192	5832	Loader V2.exe	83
PID 2104 wrote to memory of 4856	2104	Loader.exe	84
PID 2104 wrote to memory of 4856	2104	Loader.exe	84
PID 2104 wrote to memory of 2160	2104	Loader.exe	85
PID 2104 wrote to memory of 2160	2104	Loader.exe	85
PID 4856 wrote to memory of 4516	4856	loaderr.exe	87
PID 4856 wrote to memory of 4516	4856	loaderr.exe	87
PID 4856 wrote to memory of 4920	4856	loaderr.exe	89
PID 4856 wrote to memory of 4920	4856	loaderr.exe	89
PID 5192 wrote to memory of 4264	5192	injectdll.exe	91
PID 5192 wrote to memory of 4264	5192	injectdll.exe	91
PID 4856 wrote to memory of 1176	4856	loaderr.exe	93
PID 4856 wrote to memory of 1176	4856	loaderr.exe	93
PID 4856 wrote to memory of 5468	4856	loaderr.exe	95
PID 4856 wrote to memory of 5468	4856	loaderr.exe	95
PID 4856 wrote to memory of 2844	4856	loaderr.exe	97
PID 4856 wrote to memory of 2844	4856	loaderr.exe	97

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:5832
- C:\Users\Admin\AppData\Roaming\Loader.exe
  "C:\Users\Admin\AppData\Roaming\Loader.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:2104
- - 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:4856
  - - 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:4516
  - - 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:4920
  - - 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:1176
  - - 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:5468
  - - 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:2844
- - 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:2160
- 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:5192
- - 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:4264

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:5860

C:\Users\Admin\AppData\Local\svchost.exe
C:\Users\Admin\AppData\Local\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:108

C:\Users\Admin\AppData\Roaming\svhost.exe
C:\Users\Admin\AppData\Roaming\svhost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:6108

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svhost.exe.log

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
2e8eb51096d6f6781456fef7df731d97

SHA1
ec2aaf851a618fb43c3d040a13a71997c25bda43

SHA256
96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864

SHA512
0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
781da0576417bf414dc558e5a315e2be

SHA1
215451c1e370be595f1c389f587efeaa93108b4c

SHA256
41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe

SHA512
24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
0176453f1fef559ae37af83dc87aa474

SHA1
7130557502d1733c8a330351fce5001312ad51d8

SHA256
57249ae210e2076711ac8e0756ce91b9fdb241833b6bb1cddb592a7db23ff0ba

SHA512
dc021a0d33cbe3117ad830ad99bfc65cb6f23bf73fa0a19efb1176b15459c28e4f1033cb1fb0761a7ff69c865634c433009802b9aed65d8140598c441c8a06fd

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cwtiparp.qrl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\fixer.exe

Filesize
274KB

MD5
88505913c2c75f796c9a021aab2d356d

SHA1
5b5c06998d3e200c21c77ea4efaeaecdc7344e78

SHA256
62e414e990e80c8203955b0e32948ddc64903b80a462c339f1babfb03e641204

SHA512
6fa46be04c2693ea164fe52ddf3cca0bdafd1ab34d8c0f1c2bf3d361c6042f45375343f59e9474ded6718f8177a4f7eb19fddccd95f7fbb87aad12358b2d6905

Download Submit
C:\Users\Admin\AppData\Local\Temp\loaderr.exe

Filesize
65KB

MD5
95f8f28f5a8503461db6804cda9c4934

SHA1
81c0a30e498093d41948777135bbd407c7611cda

SHA256
aa40b9b929868482be1daae474d7c93426cd049f844c956865709ff8b7f240c2

SHA512
5c3460372a6640a98dd1b1d34a03b951ec4a8942e9065475e982a207881f290aedc3b51fe73c0da4c527e222addd1de2be7ba541e82287e43e16fc544ab34461

Download Submit
C:\Users\Admin\AppData\Roaming\44\Process.txt

Filesize
1KB

MD5
71e931a0d3f81cd6d6f3550e5c3f2468

SHA1
3685e7d5869d68bc7c0144d5c94c956b74de3920

SHA256
ac9424ed8e30322fd6cac67ff7d1f4de9b0b72920a6d5cc0598442f695556306

SHA512
fcd86f09d48e286f869c1b38fecb80ea09ee1a358a42a1d873227349d1ebf76d850c08b079261eb6ea6df343ffcfd2023c8c9ad723a3b7067ee1ee5a92722f00

Download Submit
C:\Users\Admin\AppData\Roaming\44\Process.txt

Filesize
1KB

MD5
8f52c176d8b72bf1dfa3c4f848f68daa

SHA1
52b73278be8e6c97c5ad2620c3aa2554dac4d46d

SHA256
36c1a1eadc12f6cdb7b3e8e78710cceadd7c50a9d0567630dbc4ac7c93b89599

SHA512
f27f749e59dd09ff72d35ec8cd57250aace9ce3586024194a366962ac37cf3f0c1f515019190408c35b63e83b21c1a7171cd0d2391102312d136bd669b074704

Download Submit
C:\Users\Admin\AppData\Roaming\Loader.exe

Filesize
7.6MB

MD5
aa16f3774491b600121545a5f194cefc

SHA1
c872fe765ecff1dada8378ad8a12cd5cf0425219

SHA256
c0a2b824a0fd05854818bfb81b02bc6178db3f8519807b15d844580099428e1d

SHA512
8b50e7c6eca25ecc2196fbfaf42079873e3c532a90e8d8b691fb594da3e067593f86f0d6488d0c314a27d78519f33fcbfb4532f811997891d55a47d582e1b3a8

Download Submit
C:\Users\Admin\AppData\Roaming\injectdll.exe

Filesize
244KB

MD5
74ffb0d60d647dd6ad8d00c1bee48011

SHA1
4c8a707a33b35b78f374c66d59f9c2314c20b25f

SHA256
b481f1e0cfe25e5f19da0a0333c78661bf5c75c0b1c616ff4aaaa07aed31efd1

SHA512
fc667f4560d6b19a9a4f37eb0e66c751eb348ffc0db69c7d0bd733dfd2df2dfdadc7b780cd93686350444cc14a54283bafe3afec611bcac3ad0239eda659f46c

Download Submit
memory/1176-224-0x0000012E553B0000-0x0000012E554FF000-memory.dmp

Filesize
1.3MB

Download
memory/2104-98-0x00007FFF1E560000-0x00007FFF1F022000-memory.dmp

Filesize
10.8MB

Download
memory/2104-26-0x0000000000D10000-0x00000000014A4000-memory.dmp

Filesize
7.6MB

Download
memory/2104-27-0x00007FFF1E560000-0x00007FFF1F022000-memory.dmp

Filesize
10.8MB

Download
memory/2160-59-0x0000021D71E50000-0x0000021D71E9A000-memory.dmp

Filesize
296KB

Download
memory/4516-186-0x0000016FD9790000-0x0000016FD97B2000-memory.dmp

Filesize
136KB

Download
memory/4516-197-0x0000016FD98A0000-0x0000016FD99EF000-memory.dmp

Filesize
1.3MB

Download
memory/4856-48-0x0000000000330000-0x0000000000346000-memory.dmp

Filesize
88KB

Download
memory/4920-210-0x00000192E9BF0000-0x00000192E9D3F000-memory.dmp

Filesize
1.3MB

Download
memory/5192-28-0x00007FFF1E560000-0x00007FFF1F022000-memory.dmp

Filesize
10.8MB

Download
memory/5192-185-0x00007FFF1E560000-0x00007FFF1F022000-memory.dmp

Filesize
10.8MB

Download
memory/5192-25-0x0000000000580000-0x00000000005C2000-memory.dmp

Filesize
264KB

Download
memory/5468-235-0x0000027033190000-0x00000270332DF000-memory.dmp

Filesize
1.3MB

Download
memory/5832-0-0x00007FFF1E563000-0x00007FFF1E565000-memory.dmp

Filesize
8KB

Download
memory/5832-1-0x0000000000890000-0x00000000010A8000-memory.dmp

Filesize
8.1MB

Download