Overview
overview
10Static
static
10TrojanRans...29.exe
windows7-x64
10TrojanRans...29.exe
windows10-2004-x64
10source/Bat...er.exe
windows7-x64
5source/Bat...er.exe
windows10-2004-x64
5source/Bat...lp.chm
windows7-x64
1source/Bat...lp.chm
windows10-2004-x64
1source/Cov29Cry.exe
windows7-x64
10source/Cov29Cry.exe
windows10-2004-x64
10source/Cov...v4.exe
windows7-x64
10source/Cov...v4.exe
windows10-2004-x64
10source/Cov...ry.exe
windows7-x64
10source/Cov...ry.exe
windows10-2004-x64
10source/Cov...en.exe
windows7-x64
3source/Cov...en.exe
windows10-2004-x64
3source/Cov...en.exe
windows7-x64
3source/Cov...en.exe
windows10-2004-x64
3source/Tro...29.bat
windows7-x64
10source/Tro...29.bat
windows10-2004-x64
10source/mbr.exe
windows7-x64
6source/mbr.exe
windows10-2004-x64
6Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
10-12-2024 20:27
Behavioral task
behavioral1
Sample
TrojanRansomCovid29.exe
Resource
win7-20240903-en
windows7-x64
Behavioral task
behavioral2
Sample
TrojanRansomCovid29.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
Behavioral task
behavioral3
Sample
source/Bat To Exe Converter/Bat_To_Exe_Converter.exe
Resource
win7-20240903-en
windows7-x64
Behavioral task
behavioral4
Sample
source/Bat To Exe Converter/Bat_To_Exe_Converter.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
Behavioral task
behavioral5
Sample
source/Bat To Exe Converter/help.chm
Resource
win7-20241010-en
windows7-x64
Behavioral task
behavioral6
Sample
source/Bat To Exe Converter/help.chm
Resource
win10v2004-20241007-en
windows10-2004-x64
Behavioral task
behavioral7
Sample
source/Cov29Cry.exe
Resource
win7-20240708-en
windows7-x64
Behavioral task
behavioral8
Sample
source/Cov29Cry.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
Behavioral task
behavioral9
Sample
source/Cov29Cry/Chaos Ransomware Builder v4.exe
Resource
win7-20240903-en
windows7-x64
Behavioral task
behavioral10
Sample
source/Cov29Cry/Chaos Ransomware Builder v4.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
Behavioral task
behavioral11
Sample
source/Cov29Cry/Cov29Cry.exe
Resource
win7-20240729-en
windows7-x64
Behavioral task
behavioral12
Sample
source/Cov29Cry/Cov29Cry.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
Behavioral task
behavioral13
Sample
source/Cov29LockScreen.exe
Resource
win7-20240903-en
windows7-x64
Behavioral task
behavioral14
Sample
source/Cov29LockScreen.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
Behavioral task
behavioral15
Sample
source/Cov29LockScreen/Cov29LockScreen.exe
Resource
win7-20240903-en
windows7-x64
Behavioral task
behavioral16
Sample
source/Cov29LockScreen/Cov29LockScreen.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
Behavioral task
behavioral17
Sample
source/TrojanRansomCovid29.bat
Resource
win7-20240903-en
windows7-x64
Behavioral task
behavioral18
Sample
source/TrojanRansomCovid29.bat
Resource
win10v2004-20241007-en
windows10-2004-x64
Behavioral task
behavioral19
Sample
source/mbr.exe
Resource
win7-20240708-en
windows7-x64
Behavioral task
behavioral20
Sample
source/mbr.exe
Resource
win10v2004-20241007-en
windows10-2004-x64
General
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Target
source/Cov29Cry.exe
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Size
103KB
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MD5
8bcd083e16af6c15e14520d5a0bd7e6a
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SHA1
c4d2f35d1fdb295db887f31bbc9237ac9263d782
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SHA256
b4f78ff66dc3f5f8ddd694166e6b596d533830792f9b5f1634d3f5f17d6a884a
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SHA512
35999577be0626b50eeab65b493d48af2ab42b699f7241d2780647bf7d72069216d99f5f708337a109e79b9c9229613b8341f44c6d96245fd1f3ac9f05814d6a
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SSDEEP
3072:H3kyzZr9SE9RmXjSPjXvyT2cQf8WhjTRqvM:N1r9SELZDv25iVly
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 behavioral8/memory/5068-1-0x00000000001E0000-0x0000000000200000-memory.dmp family_chaos behavioral8/files/0x000b000000023b8a-6.dat family_chaos -
Chaos family
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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 4628 bcdedit.exe 2544 bcdedit.exe -
pid Process 828 wbadmin.exe -
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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation svchost.exe Key value queried \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation Cov29Cry.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 1324 svchost.exe -
Reads user/profile data of web browsers 3 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\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\Admin\Videos\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\Music\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\Programs\Accessories\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\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\AppData\Roaming\Microsoft\Windows\SendTo\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 F:\$RECYCLE.BIN\S-1-5-21-3227495264-2217614367-4027411560-1000\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\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\Admin\Links\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\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\Documents\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\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ahqmbb6cl.jpg" 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 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 4940 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000_Classes\Local Settings svchost.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1324 svchost.exe -
Suspicious behavior: EnumeratesProcesses 51 IoCs
pid Process 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 5068 Cov29Cry.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe 1324 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 5068 Cov29Cry.exe Token: SeDebugPrivilege 1324 svchost.exe Token: SeBackupPrivilege 3376 vssvc.exe Token: SeRestorePrivilege 3376 vssvc.exe Token: SeAuditPrivilege 3376 vssvc.exe Token: SeIncreaseQuotaPrivilege 3908 WMIC.exe Token: SeSecurityPrivilege 3908 WMIC.exe Token: SeTakeOwnershipPrivilege 3908 WMIC.exe Token: SeLoadDriverPrivilege 3908 WMIC.exe Token: SeSystemProfilePrivilege 3908 WMIC.exe Token: SeSystemtimePrivilege 3908 WMIC.exe Token: SeProfSingleProcessPrivilege 3908 WMIC.exe Token: SeIncBasePriorityPrivilege 3908 WMIC.exe Token: SeCreatePagefilePrivilege 3908 WMIC.exe Token: SeBackupPrivilege 3908 WMIC.exe Token: SeRestorePrivilege 3908 WMIC.exe Token: SeShutdownPrivilege 3908 WMIC.exe Token: SeDebugPrivilege 3908 WMIC.exe Token: SeSystemEnvironmentPrivilege 3908 WMIC.exe Token: SeRemoteShutdownPrivilege 3908 WMIC.exe Token: SeUndockPrivilege 3908 WMIC.exe Token: SeManageVolumePrivilege 3908 WMIC.exe Token: 33 3908 WMIC.exe Token: 34 3908 WMIC.exe Token: 35 3908 WMIC.exe Token: 36 3908 WMIC.exe Token: SeIncreaseQuotaPrivilege 3908 WMIC.exe Token: SeSecurityPrivilege 3908 WMIC.exe Token: SeTakeOwnershipPrivilege 3908 WMIC.exe Token: SeLoadDriverPrivilege 3908 WMIC.exe Token: SeSystemProfilePrivilege 3908 WMIC.exe Token: SeSystemtimePrivilege 3908 WMIC.exe Token: SeProfSingleProcessPrivilege 3908 WMIC.exe Token: SeIncBasePriorityPrivilege 3908 WMIC.exe Token: SeCreatePagefilePrivilege 3908 WMIC.exe Token: SeBackupPrivilege 3908 WMIC.exe Token: SeRestorePrivilege 3908 WMIC.exe Token: SeShutdownPrivilege 3908 WMIC.exe Token: SeDebugPrivilege 3908 WMIC.exe Token: SeSystemEnvironmentPrivilege 3908 WMIC.exe Token: SeRemoteShutdownPrivilege 3908 WMIC.exe Token: SeUndockPrivilege 3908 WMIC.exe Token: SeManageVolumePrivilege 3908 WMIC.exe Token: 33 3908 WMIC.exe Token: 34 3908 WMIC.exe Token: 35 3908 WMIC.exe Token: 36 3908 WMIC.exe Token: SeBackupPrivilege 4296 wbengine.exe Token: SeRestorePrivilege 4296 wbengine.exe Token: SeSecurityPrivilege 4296 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 5068 wrote to memory of 1324 5068 Cov29Cry.exe 82 PID 5068 wrote to memory of 1324 5068 Cov29Cry.exe 82 PID 1324 wrote to memory of 1460 1324 svchost.exe 83 PID 1324 wrote to memory of 1460 1324 svchost.exe 83 PID 1460 wrote to memory of 4940 1460 cmd.exe 85 PID 1460 wrote to memory of 4940 1460 cmd.exe 85 PID 1460 wrote to memory of 3908 1460 cmd.exe 88 PID 1460 wrote to memory of 3908 1460 cmd.exe 88 PID 1324 wrote to memory of 1524 1324 svchost.exe 90 PID 1324 wrote to memory of 1524 1324 svchost.exe 90 PID 1524 wrote to memory of 4628 1524 cmd.exe 92 PID 1524 wrote to memory of 4628 1524 cmd.exe 92 PID 1524 wrote to memory of 2544 1524 cmd.exe 93 PID 1524 wrote to memory of 2544 1524 cmd.exe 93 PID 1324 wrote to memory of 4344 1324 svchost.exe 94 PID 1324 wrote to memory of 4344 1324 svchost.exe 94 PID 4344 wrote to memory of 828 4344 cmd.exe 96 PID 4344 wrote to memory of 828 4344 cmd.exe 96 PID 1324 wrote to memory of 4436 1324 svchost.exe 101 PID 1324 wrote to memory of 4436 1324 svchost.exe 101 -
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\source\Cov29Cry.exe"C:\Users\Admin\AppData\Local\Temp\source\Cov29Cry.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5068 -
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:1324 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1460 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:4940
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3908
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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:1524 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:4628
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:2544
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:4344 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:828
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\covid29-is-here.txt3⤵PID:4436
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3376
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4296
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:3656
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1040
Network
MITRE ATT&CK Enterprise v15
Defense Evasion
Direct Volume Access
1Indicator Removal
3File Deletion
3Modify Registry
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
103KB
MD58bcd083e16af6c15e14520d5a0bd7e6a
SHA1c4d2f35d1fdb295db887f31bbc9237ac9263d782
SHA256b4f78ff66dc3f5f8ddd694166e6b596d533830792f9b5f1634d3f5f17d6a884a
SHA51235999577be0626b50eeab65b493d48af2ab42b699f7241d2780647bf7d72069216d99f5f708337a109e79b9c9229613b8341f44c6d96245fd1f3ac9f05814d6a
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Filesize
861B
MD5c53dee51c26d1d759667c25918d3ed10
SHA1da194c2de15b232811ba9d43a46194d9729507f0
SHA256dd5b3d185ae1809407e7822de4fced945115b48cc33b2950a8da9ebd77a68c52
SHA512da41cef03f1b5f21a1fca2cfbf1b2b180c261a75d391be3a1ba36e8d4d4aefab8db024391bbee06b99de0cb0b8eb8c89f2a304c27e20c0af171b77db33b2d12c