Analysis
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max time kernel
143s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 19:57
Static task
static1
Behavioral task
behavioral1
Sample
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Resource
win10v2004-20240426-en
General
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Target
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
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Size
716KB
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MD5
2a02c81a9994f011090e174bb076ec9b
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SHA1
50cf1a96d5e2945143b6fb3484b124d41349c77c
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SHA256
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18
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SHA512
d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a
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SSDEEP
12288:0k0wJoEANTCwX67nsbdxnZF2+9R32y1Cbd8n34rtzjg1S0lWEKm:0kVCGwX6LsbS+9Uy1CxCwtQkeKm
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.vepi
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 13 IoCs
Processes:
resource yara_rule behavioral1/memory/2932-2-0x00000000045B0000-0x00000000046CB000-memory.dmp family_djvu behavioral1/memory/1332-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1332-7-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1332-8-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1332-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2252-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2252-45-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2252-46-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2252-47-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2252-52-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2252-50-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2252-53-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2252-54-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\e3996ae0-e4be-40d3-82da-b549477bb7c8\\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe\" --AutoStart" c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.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 3 api.2ip.ua 4 api.2ip.ua 9 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription pid process target process PID 2932 set thread context of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 set thread context of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exepid process 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe 2252 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe 2252 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exec4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exedescription pid process target process PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2932 wrote to memory of 1332 2932 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1332 wrote to memory of 2748 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 1332 wrote to memory of 2748 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 1332 wrote to memory of 2748 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 1332 wrote to memory of 2748 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe icacls.exe PID 1332 wrote to memory of 2644 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1332 wrote to memory of 2644 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1332 wrote to memory of 2644 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 1332 wrote to memory of 2644 1332 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe PID 2644 wrote to memory of 2252 2644 c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\e3996ae0-e4be-40d3-82da-b549477bb7c8" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe"C:\Users\Admin\AppData\Local\Temp\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
1KB
MD57bb5a14437331aad24915a3d8546fbc1
SHA19a5570c07af0c0cde02858f61e1c7094f5a70f38
SHA25642397d9f3c8164d4cef19fc169d7bcea77a3ea7e9bcb8cfa7db2ff0bbd3a7e00
SHA512a2333a078be981eafe3f666ff3944cd3b28279a9da99f354014d81d80e98a0effabff2a8f5ab5fba61f7de9e49e2af3112dda6b28678192a1d80d2ca22004f13
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
410B
MD55c4c959b94bb33215ee967885d81ea0c
SHA1436833e42c91eba54a388125cbd1b1350ffc9ba9
SHA256fe581d4332c3337befe8f6793848dad9ed959b45f14612dc58e426bd47782abc
SHA512b03de9691c4474d4bbba1b7a9434af8f091047a2fd8cbfdb3c1351f3334ff406d2bb7bc7b11aed6d49dbfadd4915adeb37d1320849bf31476d53a02e65d9530f
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015Filesize
344B
MD54092a2efa2c6e1b847e69ac1925e3de8
SHA115502a6f96fcab42eefb8319f5f2e8b780373400
SHA256e2ebace4049200833cc99e5117dabbfa921045bc8c3d7dfa4f1010cfd7a9af8f
SHA5125322f795bed3e4ada4ca66582b628d8e20fb62483aa79e9cc5cef1525de5e6dff46d048a156671764c51fd4dfb642f0beadd270b567e9abe5538c81ee05cbeff
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD5f442c62d2f53b0a9dac807f6d95a14ce
SHA1b9a4fed2b384d275a1ba391ee6ad3b64e47cd5b6
SHA256aee86293ebb4a921dbdfd58c6dcafca61e8b264b72dd2c9dd1bfc9dbaeafdf2a
SHA5129b6041d03df53da3bbd45a8c67036f45cdebe954ca006f4fc2de98970433e8cf9a19e00846077fb15418789c6f6b7050d63500c9f2f859ca2a376c5585d857c2
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C:\Users\Admin\AppData\Local\Temp\Cab26A3.tmpFilesize
68KB
MD529f65ba8e88c063813cc50a4ea544e93
SHA105a7040d5c127e68c25d81cc51271ffb8bef3568
SHA2561ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
SHA512e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
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C:\Users\Admin\AppData\Local\e3996ae0-e4be-40d3-82da-b549477bb7c8\c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18.exeFilesize
716KB
MD52a02c81a9994f011090e174bb076ec9b
SHA150cf1a96d5e2945143b6fb3484b124d41349c77c
SHA256c4c71690ff4a51f824ed4aeeb9230d0a9d846d289fbc9b228578f776e80cba18
SHA512d6d44ee8d3cb1a39228e24f669e86ee871f0bef7b3348924b63e4b067b0ccf0f9f00333fa55d7f46b18dcd13fb4144e83e2611d118557639aa837861eb51342a
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memory/1332-8-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1332-7-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1332-28-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/1332-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmpFilesize
4KB
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memory/1332-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2252-52-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2252-32-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2252-45-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2252-46-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2252-47-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2252-50-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2252-53-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2252-54-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2644-29-0x0000000000220000-0x00000000002B1000-memory.dmpFilesize
580KB
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memory/2932-0-0x0000000002D20000-0x0000000002DB1000-memory.dmpFilesize
580KB
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memory/2932-1-0x0000000002D20000-0x0000000002DB1000-memory.dmpFilesize
580KB
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memory/2932-2-0x00000000045B0000-0x00000000046CB000-memory.dmpFilesize
1.1MB