Analysis
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max time kernel
92s -
max time network
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platform
windows11-21h2_x64 -
resource
win11-20240802-en -
resource tags
arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system -
submitted
12-08-2024 00:38
Behavioral task
behavioral1
Sample
random.exe
Resource
win11-20240802-en
windows11-21h2-x64
22 signatures
150 seconds
General
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Target
random.exe
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Size
32KB
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MD5
3b8203bedf765cfd612535bb466d0bfe
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SHA1
20f138c28f8907e3886c908c222a7be3958e45f2
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SHA256
d450d6bef77d5938c671693eba08fd6642e7f4bf376b3fef1d9d67a51ad05b2a
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SHA512
e07f229e664c27375c35be7c431d5abbfae59ce8043b6e1e7144127f39b244b722e0102a833e91b566471e5fad2226260cb160af21adebce08eee1d48d912fa3
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SSDEEP
384:33MLWHn3kIjla0JIbITNpOpoigXGJHr91CppZkM5hEMyeq:Dn3kIZJI8TNplj6Hr9OpZkM5hEBeq
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 behavioral1/memory/3824-0-0x0000000000BD0000-0x0000000000BDE000-memory.dmp family_chaos behavioral1/files/0x000300000002aa29-6.dat family_chaos -
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 5092 bcdedit.exe 2828 bcdedit.exe -
pid Process 2868 wbadmin.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 4040 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\Desktop\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 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\AppData\Roaming\Microsoft\Windows\Recent\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\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\User Pinned\TaskBar\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\Pictures\Camera Roll\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\Contacts\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\Public\Pictures\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\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\Public\Music\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\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\Videos\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 F:\$RECYCLE.BIN\S-1-5-21-2842058299-443432012-2465494467-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks SCSI registry key(s) 3 TTPs 4 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName vds.exe -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 1696 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2842058299-443432012-2465494467-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 3056 NOTEPAD.EXE -
Runs regedit.exe 1 IoCs
pid Process 2248 regedit.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4040 svchost.exe -
Suspicious behavior: EnumeratesProcesses 39 IoCs
pid Process 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 3824 random.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe 4040 svchost.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2248 regedit.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 3824 random.exe Token: SeDebugPrivilege 4040 svchost.exe Token: SeBackupPrivilege 1504 vssvc.exe Token: SeRestorePrivilege 1504 vssvc.exe Token: SeAuditPrivilege 1504 vssvc.exe Token: SeIncreaseQuotaPrivilege 3080 WMIC.exe Token: SeSecurityPrivilege 3080 WMIC.exe Token: SeTakeOwnershipPrivilege 3080 WMIC.exe Token: SeLoadDriverPrivilege 3080 WMIC.exe Token: SeSystemProfilePrivilege 3080 WMIC.exe Token: SeSystemtimePrivilege 3080 WMIC.exe Token: SeProfSingleProcessPrivilege 3080 WMIC.exe Token: SeIncBasePriorityPrivilege 3080 WMIC.exe Token: SeCreatePagefilePrivilege 3080 WMIC.exe Token: SeBackupPrivilege 3080 WMIC.exe Token: SeRestorePrivilege 3080 WMIC.exe Token: SeShutdownPrivilege 3080 WMIC.exe Token: SeDebugPrivilege 3080 WMIC.exe Token: SeSystemEnvironmentPrivilege 3080 WMIC.exe Token: SeRemoteShutdownPrivilege 3080 WMIC.exe Token: SeUndockPrivilege 3080 WMIC.exe Token: SeManageVolumePrivilege 3080 WMIC.exe Token: 33 3080 WMIC.exe Token: 34 3080 WMIC.exe Token: 35 3080 WMIC.exe Token: 36 3080 WMIC.exe Token: SeIncreaseQuotaPrivilege 3080 WMIC.exe Token: SeSecurityPrivilege 3080 WMIC.exe Token: SeTakeOwnershipPrivilege 3080 WMIC.exe Token: SeLoadDriverPrivilege 3080 WMIC.exe Token: SeSystemProfilePrivilege 3080 WMIC.exe Token: SeSystemtimePrivilege 3080 WMIC.exe Token: SeProfSingleProcessPrivilege 3080 WMIC.exe Token: SeIncBasePriorityPrivilege 3080 WMIC.exe Token: SeCreatePagefilePrivilege 3080 WMIC.exe Token: SeBackupPrivilege 3080 WMIC.exe Token: SeRestorePrivilege 3080 WMIC.exe Token: SeShutdownPrivilege 3080 WMIC.exe Token: SeDebugPrivilege 3080 WMIC.exe Token: SeSystemEnvironmentPrivilege 3080 WMIC.exe Token: SeRemoteShutdownPrivilege 3080 WMIC.exe Token: SeUndockPrivilege 3080 WMIC.exe Token: SeManageVolumePrivilege 3080 WMIC.exe Token: 33 3080 WMIC.exe Token: 34 3080 WMIC.exe Token: 35 3080 WMIC.exe Token: 36 3080 WMIC.exe Token: SeBackupPrivilege 2600 wbengine.exe Token: SeRestorePrivilege 2600 wbengine.exe Token: SeSecurityPrivilege 2600 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 3824 wrote to memory of 4040 3824 random.exe 83 PID 3824 wrote to memory of 4040 3824 random.exe 83 PID 4040 wrote to memory of 696 4040 svchost.exe 84 PID 4040 wrote to memory of 696 4040 svchost.exe 84 PID 696 wrote to memory of 1696 696 cmd.exe 86 PID 696 wrote to memory of 1696 696 cmd.exe 86 PID 696 wrote to memory of 3080 696 cmd.exe 89 PID 696 wrote to memory of 3080 696 cmd.exe 89 PID 4040 wrote to memory of 3560 4040 svchost.exe 91 PID 4040 wrote to memory of 3560 4040 svchost.exe 91 PID 3560 wrote to memory of 5092 3560 cmd.exe 93 PID 3560 wrote to memory of 5092 3560 cmd.exe 93 PID 3560 wrote to memory of 2828 3560 cmd.exe 94 PID 3560 wrote to memory of 2828 3560 cmd.exe 94 PID 4040 wrote to memory of 2312 4040 svchost.exe 95 PID 4040 wrote to memory of 2312 4040 svchost.exe 95 PID 2312 wrote to memory of 2868 2312 cmd.exe 97 PID 2312 wrote to memory of 2868 2312 cmd.exe 97 PID 4040 wrote to memory of 3056 4040 svchost.exe 102 PID 4040 wrote to memory of 3056 4040 svchost.exe 102 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\random.exe"C:\Users\Admin\AppData\Local\Temp\random.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3824 -
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)
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4040 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:696 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1696
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3080
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no3⤵
- Suspicious use of WriteProcessMemory
PID:3560 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:5092
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2828
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2312 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2868
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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:3056
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1504
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2600
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1220
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1912
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:316
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C:\Windows\regedit.exe"C:\Windows\regedit.exe"1⤵
- Runs regedit.exe
- Suspicious behavior: GetForegroundWindowSpam
PID:2248
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
32KB
MD53b8203bedf765cfd612535bb466d0bfe
SHA120f138c28f8907e3886c908c222a7be3958e45f2
SHA256d450d6bef77d5938c671693eba08fd6642e7f4bf376b3fef1d9d67a51ad05b2a
SHA512e07f229e664c27375c35be7c431d5abbfae59ce8043b6e1e7144127f39b244b722e0102a833e91b566471e5fad2226260cb160af21adebce08eee1d48d912fa3
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Filesize
6KB
MD5fd2a0bdc9a576617d725d35784a6a824
SHA1d08aed0fe2d1ace2a1bb466fb90826fc1e8d8e3b
SHA25622ae9851e674f1b329ce25601e242406886c9000f51823ecddea9ec1b9276918
SHA51220ebf1c2e225644b6a9577c9a07bb8e06edaf93729f8bc472b004b79a6b19f5c5d45b6f4f3a36d86a9354bf360b27ed118cba76596dcbe915c8ba28897ac6e77