Analysis
-
max time kernel
137s -
max time network
162s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
28/01/2024, 22:35
Behavioral task
behavioral1
Sample
2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe
Resource
win10v2004-20231215-en
General
-
Target
2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe
-
Size
26KB
-
MD5
838d0ff678e614c0c29ae6f94065267d
-
SHA1
5ad07c06ac5f856fc90e3bb6d4384d40efa8e069
-
SHA256
9185fa68f0b418f453c8cf1eb1b602ce0597ba12b13460163a2a8a96519d1770
-
SHA512
2b102aecbd57c06cb95c0d683ebcc6a527b0aa8c3337f29b08701065695759aa6d89cbcb7254c6a5faf1fca6ae1f5daeaab8c5844792aa6919e0025fd61e8590
-
SSDEEP
384:qYenjLLAps4T5lBavzb/xlhKOVp91Qsb5hxDGW:5OElB6sc9GsbXxDx
Malware Config
Extracted
C:\Users\Admin\3D Objects\read_it.txt
chaos
Signatures
-
Chaos
Ransomware family first seen in June 2021.
-
Chaos Ransomware 2 IoCs
resource yara_rule behavioral2/memory/2872-0-0x00000000007C0000-0x00000000007CC000-memory.dmp family_chaos behavioral2/files/0x0007000000023116-6.dat family_chaos -
Detects command variations typically used by ransomware 2 IoCs
resource yara_rule behavioral2/memory/2872-0-0x00000000007C0000-0x00000000007CC000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral2/files/0x0007000000023116-6.dat INDICATOR_SUSPICIOUS_GENRansomware -
Renames multiple (170) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
-
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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation svchost.exe Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.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 3856 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) 64 IoCs
description ioc Process 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\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Default\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\AppData\Local\Microsoft\Windows\Application Shortcuts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group3\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\Pictures\Saved Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Admin\3D Objects\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group1\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn2\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\History\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\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn1\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\Default\AppData\Local\Microsoft\Windows\WinX\Group2\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\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\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group1\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\System Tools\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group2\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\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\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\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group3\desktop.ini svchost.exe File opened for modification C:\Users\Public\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Default\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Libraries\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3073191680-435865314-2862784915-1000\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\All Users\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\desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\StartUp\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-1-5-21-3073191680-435865314-2862784915-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 4284 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 3856 svchost.exe -
Suspicious behavior: EnumeratesProcesses 49 IoCs
pid Process 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe 3856 svchost.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe Token: SeDebugPrivilege 3856 svchost.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2872 wrote to memory of 3856 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 84 PID 2872 wrote to memory of 3856 2872 2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe 84 PID 3856 wrote to memory of 4284 3856 svchost.exe 89 PID 3856 wrote to memory of 4284 3856 svchost.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe"C:\Users\Admin\AppData\Local\Temp\2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2872 -
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:3856 -
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:4284
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
964B
MD54217b8b83ce3c3f70029a056546f8fd0
SHA1487cdb5733d073a0427418888e8f7070fe782a03
SHA2567d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA5122a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740
-
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\2c240f4be7ad5d266642c653a07012fdb16310e4f2c55aca5dadfef0ce0da8b6.exe.log
Filesize226B
MD528d7fcc2b910da5e67ebb99451a5f598
SHA1a5bf77a53eda1208f4f37d09d82da0b9915a6747
SHA2562391511d0a66ed9f84ae54254f51c09e43be01ad685db80da3201ec880abd49c
SHA5122d8eb65cbf04ca506f4ef3b9ae13ccf05ebefab702269ba70ffd1ce9e6c615db0a3ee3ac0e81a06f546fc3250b7b76155dd51241c41b507a441b658c8e761df6
-
Filesize
1B
MD5d1457b72c3fb323a2671125aef3eab5d
SHA15bab61eb53176449e25c2c82f172b82cb13ffb9d
SHA2568a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1
SHA512ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0
-
Filesize
26KB
MD5838d0ff678e614c0c29ae6f94065267d
SHA15ad07c06ac5f856fc90e3bb6d4384d40efa8e069
SHA2569185fa68f0b418f453c8cf1eb1b602ce0597ba12b13460163a2a8a96519d1770
SHA5122b102aecbd57c06cb95c0d683ebcc6a527b0aa8c3337f29b08701065695759aa6d89cbcb7254c6a5faf1fca6ae1f5daeaab8c5844792aa6919e0025fd61e8590