Analysis
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max time kernel
93s -
max time network
94s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
16-09-2024 12:49
Behavioral task
behavioral1
Sample
koko.exe
Resource
win7-20240903-en
windows7-x64
18 signatures
150 seconds
Behavioral task
behavioral2
Sample
koko.exe
Resource
win10v2004-20240802-en
windows10-2004-x64
21 signatures
150 seconds
General
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Target
koko.exe
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Size
6.9MB
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MD5
4bedf848cbe4b5b7b1af3cd7c4d5db7c
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SHA1
868c500f51222967634dcb705e7ba42d6657abfa
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SHA256
c6d52bd7c0aaadc67bcf433212a04ec2c470a592fbd11fa58af4a5118cddbac8
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SHA512
e3b0d999be6207035797faf168bf6d4f92a3468cb4592fecb73c2570ad9bdaa1146a4126a4a10ca3ab3fd6346f9fbeb9f5def635748259ec21cd668720fd43ee
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SSDEEP
49152:XC/xZL1qpiEHgA+R9ZafOKD+8PhBwYHd/bXx0P8oYK4dxQ27:
Malware Config
Extracted
Path
C:\Users\Admin\Desktop\read_it.txt
Family
chaos
Ransom Note
----> Chaos is multi language ransomware. Translate your note to any language <----
All of your files have been encrypted
Your computer was infected with a ransomware virus. Your files have been encrypted and you won't
be able to decrypt them without our help.What can I do to get my files back?You can buy our special
decryption software, this software will allow you to recover all of your data and remove the
ransomware from your computer.The price for the software is $1,500. Payment can be made in Bitcoin only.
How do I pay, where do I get Bitcoin?
Purchasing Bitcoin varies from country to country, you are best advised to do a quick google search
yourself to find out how to buy Bitcoin.
Many of our customers have reported these sites to be fast and reliable:
Coinmama - hxxps://www.coinmama.com Bitpanda - hxxps://www.bitpanda.com
Payment informationAmount: 0.1473766 BTC
Bitcoin Address: bc1qlnzcep4l4ac0ttdrq7awxev9ehu465f2vpt9x0
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/2940-1-0x0000000000580000-0x0000000000C64000-memory.dmp family_chaos behavioral2/files/0x00080000000234dc-6.dat family_chaos -
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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pid Process 448 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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation koko.exe Key value queried \REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation svchost.exe -
Drops startup file 3 IoCs
description ioc Process 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 File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 5048 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\Admin\Pictures\Saved Pictures\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\Windows\AccountPictures\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\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\Internet Explorer\Quick Launch\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\Start Menu\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\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\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\Desktop\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\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\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\System Tools\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\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-355097885-2402257403-2971294179-1000\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\Downloads\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\Public\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\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\Accessibility\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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\yh6ml74ya.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 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 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 -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2108 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 3112 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 5048 svchost.exe -
Suspicious behavior: EnumeratesProcesses 47 IoCs
pid Process 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 2940 koko.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe 5048 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 2940 koko.exe Token: SeDebugPrivilege 5048 svchost.exe Token: SeBackupPrivilege 4756 vssvc.exe Token: SeRestorePrivilege 4756 vssvc.exe Token: SeAuditPrivilege 4756 vssvc.exe Token: SeIncreaseQuotaPrivilege 2700 WMIC.exe Token: SeSecurityPrivilege 2700 WMIC.exe Token: SeTakeOwnershipPrivilege 2700 WMIC.exe Token: SeLoadDriverPrivilege 2700 WMIC.exe Token: SeSystemProfilePrivilege 2700 WMIC.exe Token: SeSystemtimePrivilege 2700 WMIC.exe Token: SeProfSingleProcessPrivilege 2700 WMIC.exe Token: SeIncBasePriorityPrivilege 2700 WMIC.exe Token: SeCreatePagefilePrivilege 2700 WMIC.exe Token: SeBackupPrivilege 2700 WMIC.exe Token: SeRestorePrivilege 2700 WMIC.exe Token: SeShutdownPrivilege 2700 WMIC.exe Token: SeDebugPrivilege 2700 WMIC.exe Token: SeSystemEnvironmentPrivilege 2700 WMIC.exe Token: SeRemoteShutdownPrivilege 2700 WMIC.exe Token: SeUndockPrivilege 2700 WMIC.exe Token: SeManageVolumePrivilege 2700 WMIC.exe Token: 33 2700 WMIC.exe Token: 34 2700 WMIC.exe Token: 35 2700 WMIC.exe Token: 36 2700 WMIC.exe Token: SeIncreaseQuotaPrivilege 2700 WMIC.exe Token: SeSecurityPrivilege 2700 WMIC.exe Token: SeTakeOwnershipPrivilege 2700 WMIC.exe Token: SeLoadDriverPrivilege 2700 WMIC.exe Token: SeSystemProfilePrivilege 2700 WMIC.exe Token: SeSystemtimePrivilege 2700 WMIC.exe Token: SeProfSingleProcessPrivilege 2700 WMIC.exe Token: SeIncBasePriorityPrivilege 2700 WMIC.exe Token: SeCreatePagefilePrivilege 2700 WMIC.exe Token: SeBackupPrivilege 2700 WMIC.exe Token: SeRestorePrivilege 2700 WMIC.exe Token: SeShutdownPrivilege 2700 WMIC.exe Token: SeDebugPrivilege 2700 WMIC.exe Token: SeSystemEnvironmentPrivilege 2700 WMIC.exe Token: SeRemoteShutdownPrivilege 2700 WMIC.exe Token: SeUndockPrivilege 2700 WMIC.exe Token: SeManageVolumePrivilege 2700 WMIC.exe Token: 33 2700 WMIC.exe Token: 34 2700 WMIC.exe Token: 35 2700 WMIC.exe Token: 36 2700 WMIC.exe Token: SeBackupPrivilege 4360 wbengine.exe Token: SeRestorePrivilege 4360 wbengine.exe Token: SeSecurityPrivilege 4360 wbengine.exe -
Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 2940 wrote to memory of 5048 2940 koko.exe 82 PID 2940 wrote to memory of 5048 2940 koko.exe 82 PID 5048 wrote to memory of 1688 5048 svchost.exe 87 PID 5048 wrote to memory of 1688 5048 svchost.exe 87 PID 1688 wrote to memory of 2108 1688 cmd.exe 89 PID 1688 wrote to memory of 2108 1688 cmd.exe 89 PID 1688 wrote to memory of 2700 1688 cmd.exe 92 PID 1688 wrote to memory of 2700 1688 cmd.exe 92 PID 5048 wrote to memory of 4136 5048 svchost.exe 93 PID 5048 wrote to memory of 4136 5048 svchost.exe 93 PID 4136 wrote to memory of 448 4136 cmd.exe 95 PID 4136 wrote to memory of 448 4136 cmd.exe 95 PID 5048 wrote to memory of 3112 5048 svchost.exe 100 PID 5048 wrote to memory of 3112 5048 svchost.exe 100 -
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\koko.exe"C:\Users\Admin\AppData\Local\Temp\koko.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2940 -
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:5048 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1688 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2108
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2700
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:4136 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:448
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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:3112
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4756
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4360
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:5056
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1300
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
6.9MB
MD54bedf848cbe4b5b7b1af3cd7c4d5db7c
SHA1868c500f51222967634dcb705e7ba42d6657abfa
SHA256c6d52bd7c0aaadc67bcf433212a04ec2c470a592fbd11fa58af4a5118cddbac8
SHA512e3b0d999be6207035797faf168bf6d4f92a3468cb4592fecb73c2570ad9bdaa1146a4126a4a10ca3ab3fd6346f9fbeb9f5def635748259ec21cd668720fd43ee
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Filesize
964B
MD54217b8b83ce3c3f70029a056546f8fd0
SHA1487cdb5733d073a0427418888e8f7070fe782a03
SHA2567d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA5122a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740