Overview
overview
10Static
static
10TrojanRans...29.exe
windows11-21h2-x64
10source/Bat...er.exe
windows11-21h2-x64
7source/Bat...lp.chm
windows11-21h2-x64
1source/Cov29Cry.exe
windows11-21h2-x64
10source/Cov...v4.exe
windows11-21h2-x64
10source/Cov...ry.exe
windows11-21h2-x64
10source/Cov...en.exe
windows11-21h2-x64
3source/Cov...en.exe
windows11-21h2-x64
3source/Tro...29.bat
windows11-21h2-x64
10source/mbr.exe
windows11-21h2-x64
6Analysis
- max time kernel
32s - max time network
142s - platform
windows11-21h2_x64 - resource
win11-20240802-en - resource tags
arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system - submitted
09/08/2024, 09:59
Behavioral task
behavioral1
Sample
TrojanRansomCovid29.exe
Resource
win11-20240802-en
windows11-21h2-x64
31 signatures
150 seconds
Behavioral task
behavioral2
Sample
source/Bat To Exe Converter/Bat_To_Exe_Converter.exe
Resource
win11-20240802-en
windows11-21h2-x64
2 signatures
150 seconds
Behavioral task
behavioral3
Sample
source/Bat To Exe Converter/help.chm
Resource
win11-20240802-en
windows11-21h2-x64
1 signatures
150 seconds
Behavioral task
behavioral4
Sample
source/Cov29Cry.exe
Resource
win11-20240802-en
windows11-21h2-x64
20 signatures
150 seconds
Behavioral task
behavioral5
Sample
source/Cov29Cry/Chaos Ransomware Builder v4.exe
Resource
win11-20240802-en
windows11-21h2-x64
4 signatures
150 seconds
Behavioral task
behavioral6
Sample
source/Cov29Cry/Cov29Cry.exe
Resource
win11-20240802-en
windows11-21h2-x64
20 signatures
150 seconds
Behavioral task
behavioral7
Sample
source/Cov29LockScreen.exe
Resource
win11-20240802-en
windows11-21h2-x64
2 signatures
150 seconds
Behavioral task
behavioral8
Sample
source/Cov29LockScreen/Cov29LockScreen.exe
Resource
win11-20240802-en
windows11-21h2-x64
2 signatures
150 seconds
Behavioral task
behavioral9
Sample
source/TrojanRansomCovid29.bat
Resource
win11-20240802-en
windows11-21h2-x64
29 signatures
150 seconds
Behavioral task
behavioral10
Sample
source/mbr.exe
Resource
win11-20240802-en
windows11-21h2-x64
2 signatures
150 seconds
General
- Target source/Cov29Cry/Cov29Cry.exe
- Size 103KB
- Sample240809-l1gmtstanf
- SHA256 b4f78ff66dc3f5f8ddd694166e6b596d533830792f9b5f1634d3f5f17d6a884a
- MD5 8bcd083e16af6c15e14520d5a0bd7e6a
- SHA1 c4d2f35d1fdb295db887f31bbc9237ac9263d782
- SHA512 35999577be0626b50eeab65b493d48af2ab42b699f7241d2780647bf7d72069216d99f5f708337a109e79b9c9229613b8341f44c6d96245fd1f3ac9f05814d6a
- SSDEEP 3072:H3kyzZr9SE9RmXjSPjXvyT2cQf8WhjTRqvM:N1r9SELZDv25iVly
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Chaos
Ransomware family first seen in June 2021.
- Chaos Ransomware 2 IoCs
resource yara_rule behavioral6/memory/832-0-0x0000000000360000-0x0000000000380000-memory.dmp family_chaos behavioral6/files/0x000600000002aa38-6.dat family_chaos - Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
- Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 3464 bcdedit.exe 2740 bcdedit.exe -
pid Process 2188 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\covid29-is-here.txt svchost.exe - Executes dropped EXE 1 IoCs
pid Process 4132 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\Pictures\Saved 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\Libraries\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-1287768749-810021449-2672985988-1000\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\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\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\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\AccountPictures\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\Music\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\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\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\Windows\Start Menu\Programs\Accessibility\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\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe - Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1287768749-810021449-2672985988-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\s47lvne9t.jpg" svchost.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks SCSI registry key(s) 3 TTPs 4 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName vds.exe 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 - Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 1888 vssadmin.exe - Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1287768749-810021449-2672985988-1000_Classes\Local Settings svchost.exe - Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4132 svchost.exe - Suspicious behavior: EnumeratesProcesses 35 IoCs
pid Process 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 832 Cov29Cry.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe 4132 svchost.exe - Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 832 Cov29Cry.exe Token: SeDebugPrivilege 4132 svchost.exe Token: SeBackupPrivilege 2920 vssvc.exe Token: SeRestorePrivilege 2920 vssvc.exe Token: SeAuditPrivilege 2920 vssvc.exe Token: SeIncreaseQuotaPrivilege 3984 WMIC.exe Token: SeSecurityPrivilege 3984 WMIC.exe Token: SeTakeOwnershipPrivilege 3984 WMIC.exe Token: SeLoadDriverPrivilege 3984 WMIC.exe Token: SeSystemProfilePrivilege 3984 WMIC.exe Token: SeSystemtimePrivilege 3984 WMIC.exe Token: SeProfSingleProcessPrivilege 3984 WMIC.exe Token: SeIncBasePriorityPrivilege 3984 WMIC.exe Token: SeCreatePagefilePrivilege 3984 WMIC.exe Token: SeBackupPrivilege 3984 WMIC.exe Token: SeRestorePrivilege 3984 WMIC.exe Token: SeShutdownPrivilege 3984 WMIC.exe Token: SeDebugPrivilege 3984 WMIC.exe Token: SeSystemEnvironmentPrivilege 3984 WMIC.exe Token: SeRemoteShutdownPrivilege 3984 WMIC.exe Token: SeUndockPrivilege 3984 WMIC.exe Token: SeManageVolumePrivilege 3984 WMIC.exe Token: 33 3984 WMIC.exe Token: 34 3984 WMIC.exe Token: 35 3984 WMIC.exe Token: 36 3984 WMIC.exe Token: SeIncreaseQuotaPrivilege 3984 WMIC.exe Token: SeSecurityPrivilege 3984 WMIC.exe Token: SeTakeOwnershipPrivilege 3984 WMIC.exe Token: SeLoadDriverPrivilege 3984 WMIC.exe Token: SeSystemProfilePrivilege 3984 WMIC.exe Token: SeSystemtimePrivilege 3984 WMIC.exe Token: SeProfSingleProcessPrivilege 3984 WMIC.exe Token: SeIncBasePriorityPrivilege 3984 WMIC.exe Token: SeCreatePagefilePrivilege 3984 WMIC.exe Token: SeBackupPrivilege 3984 WMIC.exe Token: SeRestorePrivilege 3984 WMIC.exe Token: SeShutdownPrivilege 3984 WMIC.exe Token: SeDebugPrivilege 3984 WMIC.exe Token: SeSystemEnvironmentPrivilege 3984 WMIC.exe Token: SeRemoteShutdownPrivilege 3984 WMIC.exe Token: SeUndockPrivilege 3984 WMIC.exe Token: SeManageVolumePrivilege 3984 WMIC.exe Token: 33 3984 WMIC.exe Token: 34 3984 WMIC.exe Token: 35 3984 WMIC.exe Token: 36 3984 WMIC.exe Token: SeBackupPrivilege 2052 wbengine.exe Token: SeRestorePrivilege 2052 wbengine.exe Token: SeSecurityPrivilege 2052 wbengine.exe - Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 832 wrote to memory of 4132 832 Cov29Cry.exe 78 PID 832 wrote to memory of 4132 832 Cov29Cry.exe 78 PID 4132 wrote to memory of 3264 4132 svchost.exe 79 PID 4132 wrote to memory of 3264 4132 svchost.exe 79 PID 3264 wrote to memory of 1888 3264 cmd.exe 81 PID 3264 wrote to memory of 1888 3264 cmd.exe 81 PID 3264 wrote to memory of 3984 3264 cmd.exe 84 PID 3264 wrote to memory of 3984 3264 cmd.exe 84 PID 4132 wrote to memory of 1492 4132 svchost.exe 86 PID 4132 wrote to memory of 1492 4132 svchost.exe 86 PID 1492 wrote to memory of 3464 1492 cmd.exe 88 PID 1492 wrote to memory of 3464 1492 cmd.exe 88 PID 1492 wrote to memory of 2740 1492 cmd.exe 89 PID 1492 wrote to memory of 2740 1492 cmd.exe 89 PID 4132 wrote to memory of 2524 4132 svchost.exe 90 PID 4132 wrote to memory of 2524 4132 svchost.exe 90 PID 2524 wrote to memory of 2188 2524 cmd.exe 92 PID 2524 wrote to memory of 2188 2524 cmd.exe 92 PID 4132 wrote to memory of 1736 4132 svchost.exe 97 PID 4132 wrote to memory of 1736 4132 svchost.exe 97 - 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.
- Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
C:\Users\Admin\AppData\Local\Temp\source\Cov29Cry\Cov29Cry.exe"C:\Users\Admin\AppData\Local\Temp\source\Cov29Cry\Cov29Cry.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:832 -
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)
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4132 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:3264 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1888
-
-
C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3984
-
-
-
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:1492 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:3464
-
-
C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2740
-
-
-
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2524 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2188
-
-
-
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\covid29-is-here.txt3⤵PID:1736
-
-
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2920
-
C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2052
-
C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:3156
-
C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:2844
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Roaming\svchost.exe
- Size 103KB
- SHA256 b4f78ff66dc3f5f8ddd694166e6b596d533830792f9b5f1634d3f5f17d6a884a
- MD5 8bcd083e16af6c15e14520d5a0bd7e6a
- SHA1 c4d2f35d1fdb295db887f31bbc9237ac9263d782
- SHA512 35999577be0626b50eeab65b493d48af2ab42b699f7241d2780647bf7d72069216d99f5f708337a109e79b9c9229613b8341f44c6d96245fd1f3ac9f05814d6a
- SSDEEP 3072:H3kyzZr9SE9RmXjSPjXvyT2cQf8WhjTRqvM:N1r9SELZDv25iVly
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\Desktop\covid29-is-here.txt
- Size 861B
- SHA256 dd5b3d185ae1809407e7822de4fced945115b48cc33b2950a8da9ebd77a68c52
- MD5 c53dee51c26d1d759667c25918d3ed10
- SHA1 da194c2de15b232811ba9d43a46194d9729507f0
- SHA512 da41cef03f1b5f21a1fca2cfbf1b2b180c261a75d391be3a1ba36e8d4d4aefab8db024391bbee06b99de0cb0b8eb8c89f2a304c27e20c0af171b77db33b2d12c
- MD5 SHA1 SHA512