Resubmissions
08-03-2024 11:13
240308-nbr4daee4y 1007-03-2024 08:19
240307-j78nsage2v 1007-03-2024 06:01
240307-gq7n2seh58 10Analysis
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max time kernel
122s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
08-03-2024 11:13
Behavioral task
behavioral1
Sample
mhh.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
mhh.exe
Resource
win10v2004-20240226-en
General
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Target
mhh.exe
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Size
21KB
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MD5
777642d092240d5237da22123428a3ec
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SHA1
d9c614c189c9d0050b841229fb63c4e2552163c0
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SHA256
4494b5ea65a0e3f79d85579866d94cd65f2d42182fbe051ffe286692d07f94f4
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SHA512
cb052654d4965da94545ce14aa122c36e8dcb46ee714e5cec6341af392381b155792d1c0d6f2490158c52aeeaa72b65dba1cfd9bd784523f489df0ec5583a42a
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SSDEEP
384:9+3MLWHn3kIUf16NveXpjr9VsjuJJ/r91CruUem:9Cn3kIi6NEpjr9yj6/r9Srem
Malware Config
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 3 IoCs
Processes:
resource yara_rule behavioral1/memory/2460-0-0x0000000000370000-0x000000000037C000-memory.dmp family_chaos C:\Users\Admin\AppData\Roaming\svchost.exe family_chaos behavioral1/memory/2896-7-0x00000000003C0000-0x00000000003CC000-memory.dmp family_chaos -
Drops startup file 3 IoCs
Processes:
svchost.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt svchost.exe 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 -
Executes dropped EXE 1 IoCs
Processes:
svchost.exepid process 2896 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
Processes:
svchost.exedescription ioc process File opened for modification C:\Users\Admin\Favorites\Links for United States\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\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\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2248906074-2862704502-246302768-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\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\AppData\Roaming\Microsoft\Windows\SendTo\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\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\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\Favorites\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\Accessories\Accessibility\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\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
Processes:
NOTEPAD.EXEpid process 2816 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
svchost.exepid process 2896 svchost.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
mhh.exesvchost.exepid process 2460 mhh.exe 2460 mhh.exe 2896 svchost.exe 2896 svchost.exe 2896 svchost.exe 2896 svchost.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
mhh.exesvchost.exedescription pid process Token: SeDebugPrivilege 2460 mhh.exe Token: SeDebugPrivilege 2896 svchost.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
NOTEPAD.EXEpid process 2816 NOTEPAD.EXE -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
mhh.exesvchost.exedescription pid process target process PID 2460 wrote to memory of 2896 2460 mhh.exe svchost.exe PID 2460 wrote to memory of 2896 2460 mhh.exe svchost.exe PID 2460 wrote to memory of 2896 2460 mhh.exe svchost.exe PID 2896 wrote to memory of 2816 2896 svchost.exe NOTEPAD.EXE PID 2896 wrote to memory of 2816 2896 svchost.exe NOTEPAD.EXE PID 2896 wrote to memory of 2816 2896 svchost.exe NOTEPAD.EXE
Processes
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C:\Users\Admin\AppData\Local\Temp\mhh.exe"C:\Users\Admin\AppData\Local\Temp\mhh.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2460 -
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:2896 -
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)
- Suspicious use of FindShellTrayWindow
PID:2816
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
21KB
MD5777642d092240d5237da22123428a3ec
SHA1d9c614c189c9d0050b841229fb63c4e2552163c0
SHA2564494b5ea65a0e3f79d85579866d94cd65f2d42182fbe051ffe286692d07f94f4
SHA512cb052654d4965da94545ce14aa122c36e8dcb46ee714e5cec6341af392381b155792d1c0d6f2490158c52aeeaa72b65dba1cfd9bd784523f489df0ec5583a42a
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Filesize
104B
MD57ce89e17fe514cd4e316f22cb21d341e
SHA1a4bbe08d6a0f4b5089b96051b76e8ee563202390
SHA256341aaae527b38ee958efa8dc5ea799ae948cd9267f4c0b1525d771cc5f088c44
SHA512abcb28dc211da1c8e5a5001160ba74daebeb3a7556c53679e8bc53aef60dea391423823fdc0f1742d5cc2e337e9c3b71444c7d660d4920678daf3a81fb4c71ec