Analysis
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max time kernel
120s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20230831-en -
resource tags
arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system -
submitted
10/09/2023, 15:01
Behavioral task
behavioral1
Sample
2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe
Resource
win10v2004-20230831-en
General
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Target
2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe
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Size
22KB
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MD5
768e86ceb8d6d2eb2aa19f2853819d82
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SHA1
b36371f518a0f82a7debd4140a3309245819b2da
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SHA256
3cf6a9a95f0e4237aa4c80b67922fc3f4d0e2bf9f15830c0333b910df8cbe834
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SHA512
c62e29064134ce427cb7a6a8c3eebe12f276107f3fcf5298e06b935e2c301436fd2a931efaf0dcc744fc70e8d255a6362646de50bb63f5899b222f08ccd64dfe
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SSDEEP
384:R3MLWHn3kIGPcSxlR2CpkXsQJHdtKXRIJtwr91Czxb5heG:xn3kIF6jpkNRfKXRACr9ixb7eG
Malware Config
Extracted
C:\Users\Admin\Desktop\read_it.txt
chaos
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 4 IoCs
resource yara_rule behavioral1/memory/1944-0-0x0000000000DB0000-0x0000000000DBC000-memory.dmp family_chaos behavioral1/files/0x0015000000011fff-6.dat family_chaos behavioral1/memory/2620-7-0x0000000000DA0000-0x0000000000DAC000-memory.dmp family_chaos behavioral1/files/0x0015000000011fff-5.dat family_chaos -
Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 2620 svchost.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 34 IoCs
description ioc Process File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3513876443-2771975297-1923446376-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1792 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2620 svchost.exe -
Suspicious behavior: EnumeratesProcesses 7 IoCs
pid Process 1944 2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe 1944 2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe 1944 2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe 2620 svchost.exe 2620 svchost.exe 2620 svchost.exe 2620 svchost.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1944 2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe Token: SeDebugPrivilege 2620 svchost.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 1944 wrote to memory of 2620 1944 2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe 29 PID 1944 wrote to memory of 2620 1944 2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe 29 PID 1944 wrote to memory of 2620 1944 2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe 29 PID 2620 wrote to memory of 1792 2620 svchost.exe 31 PID 2620 wrote to memory of 1792 2620 svchost.exe 31 PID 2620 wrote to memory of 1792 2620 svchost.exe 31
Processes
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C:\Users\Admin\AppData\Local\Temp\2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe"C:\Users\Admin\AppData\Local\Temp\2023-08-24_768e86ceb8d6d2eb2aa19f2853819d82_destroyer_wannacry_JC.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1944 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2620 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt3⤵
- Opens file in notepad (likely ransom note)
PID:1792
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
964B
MD54217b8b83ce3c3f70029a056546f8fd0
SHA1487cdb5733d073a0427418888e8f7070fe782a03
SHA2567d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA5122a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740
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Filesize
22KB
MD5768e86ceb8d6d2eb2aa19f2853819d82
SHA1b36371f518a0f82a7debd4140a3309245819b2da
SHA2563cf6a9a95f0e4237aa4c80b67922fc3f4d0e2bf9f15830c0333b910df8cbe834
SHA512c62e29064134ce427cb7a6a8c3eebe12f276107f3fcf5298e06b935e2c301436fd2a931efaf0dcc744fc70e8d255a6362646de50bb63f5899b222f08ccd64dfe
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Filesize
22KB
MD5768e86ceb8d6d2eb2aa19f2853819d82
SHA1b36371f518a0f82a7debd4140a3309245819b2da
SHA2563cf6a9a95f0e4237aa4c80b67922fc3f4d0e2bf9f15830c0333b910df8cbe834
SHA512c62e29064134ce427cb7a6a8c3eebe12f276107f3fcf5298e06b935e2c301436fd2a931efaf0dcc744fc70e8d255a6362646de50bb63f5899b222f08ccd64dfe
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Filesize
964B
MD54217b8b83ce3c3f70029a056546f8fd0
SHA1487cdb5733d073a0427418888e8f7070fe782a03
SHA2567d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA5122a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740