Analysis
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max time kernel
92s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
06-08-2024 03:53
Behavioral task
behavioral1
Sample
ab8c3898f405f749d76f1f4d0b2edea7.exe
Resource
win7-20240729-en
windows7-x64
13 signatures
150 seconds
Behavioral task
behavioral2
Sample
ab8c3898f405f749d76f1f4d0b2edea7.exe
Resource
win10v2004-20240802-en
windows10-2004-x64
15 signatures
150 seconds
General
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Target
ab8c3898f405f749d76f1f4d0b2edea7.exe
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Size
497KB
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MD5
ab8c3898f405f749d76f1f4d0b2edea7
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SHA1
cd84e0d07ba9d0bb0533f22d769aa89c57df65ed
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SHA256
053406e3796af92592f6af6ab78ce2372f9521b3c9286314274bf85ce4221ba8
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SHA512
339e09fdc912f84c47f7243a1caecbaf4139e1e0643726a03f1f4c80c217d74bdff01bd5a6c6ef4b725992fc1b5961420400e6d67b3e47498c31dd909fb44c2f
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SSDEEP
6144:yHr9B5aj/BXUAHi8tbQxBDVC8NfjPiU0Ci/d+EmlXZCW+WWWpw4X3KSahv:Oaj/BXUA3tcbeU9CW+WWWZov
Score
10/10
Malware Config
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 2 IoCs
resource yara_rule behavioral2/memory/3720-1-0x0000000000190000-0x0000000000212000-memory.dmp family_chaos behavioral2/files/0x000b0000000233b9-6.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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation ab8c3898f405f749d76f1f4d0b2edea7.exe Key value queried \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\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 4392 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\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\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\Pictures\Saved Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2718105630-359604950-2820636825-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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\Internet Explorer\Quick Launch\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\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\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\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\Windows\SendTo\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\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\Administrative Tools\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\53wstchot.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 228 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4392 svchost.exe -
Suspicious behavior: EnumeratesProcesses 45 IoCs
pid Process 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe 4392 svchost.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe Token: SeDebugPrivilege 4392 svchost.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3720 wrote to memory of 4392 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 88 PID 3720 wrote to memory of 4392 3720 ab8c3898f405f749d76f1f4d0b2edea7.exe 88 PID 4392 wrote to memory of 228 4392 svchost.exe 90 PID 4392 wrote to memory of 228 4392 svchost.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\ab8c3898f405f749d76f1f4d0b2edea7.exe"C:\Users\Admin\AppData\Local\Temp\ab8c3898f405f749d76f1f4d0b2edea7.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3720 -
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)
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4392 -
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:228
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
497KB
MD5ab8c3898f405f749d76f1f4d0b2edea7
SHA1cd84e0d07ba9d0bb0533f22d769aa89c57df65ed
SHA256053406e3796af92592f6af6ab78ce2372f9521b3c9286314274bf85ce4221ba8
SHA512339e09fdc912f84c47f7243a1caecbaf4139e1e0643726a03f1f4c80c217d74bdff01bd5a6c6ef4b725992fc1b5961420400e6d67b3e47498c31dd909fb44c2f
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Filesize
96B
MD52506efed38776621a5ec3517e03ce4ae
SHA1039e00bcf8cb8b8a0c50b707896ab8f9be238ebe
SHA256e5eb55c1910b0cccddda06bb50a143e08b66a831dea2fd12efe9c9ff1fe3894c
SHA512ca966cc3e3f8a99fe4a27ba225d47ee96e04ef224f32daea67084b3a5d727fcef36f1dea8d536eda6faa6ccc5a1e2febdabc030c5c02fc4aadff3104c248393d