Resubmissions
08/03/2024, 11:13
240308-nbr4daee4y1007/03/2024, 08:19
240307-j78nsage2v1007/03/2024, 06:01
240307-gq7n2seh5810Analysis
- max time kernel
142s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system - submitted
08/03/2024, 11:13
Behavioral task
behavioral1
Sample
mhh.exe
Resource
win7-20240215-en
windows7-x64
13 signatures
150 seconds
Behavioral task
behavioral2
Sample
mhh.exe
Resource
win10v2004-20240226-en
windows10-2004-x64
14 signatures
150 seconds
General
- Target mhh.exe
- Size 21KB
- Sample240308-nbr4daee4y
- SHA256 4494b5ea65a0e3f79d85579866d94cd65f2d42182fbe051ffe286692d07f94f4
- MD5 777642d092240d5237da22123428a3ec
- SHA1 d9c614c189c9d0050b841229fb63c4e2552163c0
- SHA512 cb052654d4965da94545ce14aa122c36e8dcb46ee714e5cec6341af392381b155792d1c0d6f2490158c52aeeaa72b65dba1cfd9bd784523f489df0ec5583a42a
- SSDEEP 384:9+3MLWHn3kIUf16NveXpjr9VsjuJJ/r91CruUem:9Cn3kIi6NEpjr9yj6/r9Srem
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Chaos
Ransomware family first seen in June 2021.
- Chaos Ransomware 2 IoCs
resource yara_rule behavioral2/memory/4684-0-0x0000000000410000-0x000000000041C000-memory.dmp family_chaos behavioral2/files/0x0007000000023243-6.dat family_chaos - Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation mhh.exe Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation svchost.exe - 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 2288 svchost.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Drops desktop.ini file(s) 34 IoCs
description ioc Process 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\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\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\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\Libraries\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 F:\$RECYCLE.BIN\S-1-5-21-3808065738-1666277613-1125846146-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\Recent\desktop.ini svchost.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings svchost.exe - Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1944 NOTEPAD.EXE - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2288 svchost.exe - Suspicious behavior: EnumeratesProcesses 50 IoCs
pid Process 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 4684 mhh.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe 2288 svchost.exe - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4684 mhh.exe Token: SeDebugPrivilege 2288 svchost.exe - Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 4684 wrote to memory of 2288 4684 mhh.exe 98 PID 4684 wrote to memory of 2288 4684 mhh.exe 98 PID 2288 wrote to memory of 1944 2288 svchost.exe 106 PID 2288 wrote to memory of 1944 2288 svchost.exe 106
Processes
-
C:\Users\Admin\AppData\Local\Temp\mhh.exe"C:\Users\Admin\AppData\Local\Temp\mhh.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4684 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2288 -
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:1944
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-
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3988 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:81⤵PID:808
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Roaming\svchost.exe
- Size 21KB
- SHA256 4494b5ea65a0e3f79d85579866d94cd65f2d42182fbe051ffe286692d07f94f4
- MD5 777642d092240d5237da22123428a3ec
- SHA1 d9c614c189c9d0050b841229fb63c4e2552163c0
- SHA512 cb052654d4965da94545ce14aa122c36e8dcb46ee714e5cec6341af392381b155792d1c0d6f2490158c52aeeaa72b65dba1cfd9bd784523f489df0ec5583a42a
- SSDEEP 384:9+3MLWHn3kIUf16NveXpjr9VsjuJJ/r91CruUem:9Cn3kIi6NEpjr9yj6/r9Srem
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\Desktop\read_it.txt
- Size 104B
- SHA256 341aaae527b38ee958efa8dc5ea799ae948cd9267f4c0b1525d771cc5f088c44
- MD5 7ce89e17fe514cd4e316f22cb21d341e
- SHA1 a4bbe08d6a0f4b5089b96051b76e8ee563202390
- SHA512 abcb28dc211da1c8e5a5001160ba74daebeb3a7556c53679e8bc53aef60dea391423823fdc0f1742d5cc2e337e9c3b71444c7d660d4920678daf3a81fb4c71ec
- MD5 SHA1 SHA512