chaos | bbb5c6b4f85c81a323d11d34629776e99ca40e983c5ce0d0a3d540addb1c2fe3

Analysis

max time kernel
91s
max time network
94s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
19-01-2025 22:42

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General

Target

source/Cov29Cry.exe
Size

103KB
MD5

8bcd083e16af6c15e14520d5a0bd7e6a
SHA1

c4d2f35d1fdb295db887f31bbc9237ac9263d782
SHA256

b4f78ff66dc3f5f8ddd694166e6b596d533830792f9b5f1634d3f5f17d6a884a
SHA512

35999577be0626b50eeab65b493d48af2ab42b699f7241d2780647bf7d72069216d99f5f708337a109e79b9c9229613b8341f44c6d96245fd1f3ac9f05814d6a
SSDEEP

3072:H3kyzZr9SE9RmXjSPjXvyT2cQf8WhjTRqvM:N1r9SELZDv25iVly

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

resource	yara_rule
behavioral4/memory/3088-1-0x0000000000010000-0x0000000000030000-memory.dmp	family_chaos
behavioral4/files/0x001d00000002aad8-6.dat	family_chaos

Chaos family
chaos
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
760	bcdedit.exe
2144	bcdedit.exe

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command and Scripting Interpreter

T1059

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
1948	wbadmin.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\covid29-is-here.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
1076	svchost.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\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\Music\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\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\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\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\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\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\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\System Tools\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2499603254-3415597248-1508446358-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\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\Contacts\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\Documents\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2499603254-3415597248-1508446358-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\pskguvda2.jpg"	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 4 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

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.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
2704	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2499603254-3415597248-1508446358-1000_Classes\Local Settings	svchost.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1076	svchost.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
3088	Cov29Cry.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe
1076	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	3088	Cov29Cry.exe
Token: SeDebugPrivilege	1076	svchost.exe
Token: SeBackupPrivilege	4860	vssvc.exe
Token: SeRestorePrivilege	4860	vssvc.exe
Token: SeAuditPrivilege	4860	vssvc.exe
Token: SeIncreaseQuotaPrivilege	4188	WMIC.exe
Token: SeSecurityPrivilege	4188	WMIC.exe
Token: SeTakeOwnershipPrivilege	4188	WMIC.exe
Token: SeLoadDriverPrivilege	4188	WMIC.exe
Token: SeSystemProfilePrivilege	4188	WMIC.exe
Token: SeSystemtimePrivilege	4188	WMIC.exe
Token: SeProfSingleProcessPrivilege	4188	WMIC.exe
Token: SeIncBasePriorityPrivilege	4188	WMIC.exe
Token: SeCreatePagefilePrivilege	4188	WMIC.exe
Token: SeBackupPrivilege	4188	WMIC.exe
Token: SeRestorePrivilege	4188	WMIC.exe
Token: SeShutdownPrivilege	4188	WMIC.exe
Token: SeDebugPrivilege	4188	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4188	WMIC.exe
Token: SeRemoteShutdownPrivilege	4188	WMIC.exe
Token: SeUndockPrivilege	4188	WMIC.exe
Token: SeManageVolumePrivilege	4188	WMIC.exe
Token: 33	4188	WMIC.exe
Token: 34	4188	WMIC.exe
Token: 35	4188	WMIC.exe
Token: 36	4188	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4188	WMIC.exe
Token: SeSecurityPrivilege	4188	WMIC.exe
Token: SeTakeOwnershipPrivilege	4188	WMIC.exe
Token: SeLoadDriverPrivilege	4188	WMIC.exe
Token: SeSystemProfilePrivilege	4188	WMIC.exe
Token: SeSystemtimePrivilege	4188	WMIC.exe
Token: SeProfSingleProcessPrivilege	4188	WMIC.exe
Token: SeIncBasePriorityPrivilege	4188	WMIC.exe
Token: SeCreatePagefilePrivilege	4188	WMIC.exe
Token: SeBackupPrivilege	4188	WMIC.exe
Token: SeRestorePrivilege	4188	WMIC.exe
Token: SeShutdownPrivilege	4188	WMIC.exe
Token: SeDebugPrivilege	4188	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4188	WMIC.exe
Token: SeRemoteShutdownPrivilege	4188	WMIC.exe
Token: SeUndockPrivilege	4188	WMIC.exe
Token: SeManageVolumePrivilege	4188	WMIC.exe
Token: 33	4188	WMIC.exe
Token: 34	4188	WMIC.exe
Token: 35	4188	WMIC.exe
Token: 36	4188	WMIC.exe
Token: SeBackupPrivilege	2280	wbengine.exe
Token: SeRestorePrivilege	2280	wbengine.exe
Token: SeSecurityPrivilege	2280	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3088 wrote to memory of 1076	3088	Cov29Cry.exe	79
PID 3088 wrote to memory of 1076	3088	Cov29Cry.exe	79
PID 1076 wrote to memory of 1164	1076	svchost.exe	80
PID 1076 wrote to memory of 1164	1076	svchost.exe	80
PID 1164 wrote to memory of 2704	1164	cmd.exe	82
PID 1164 wrote to memory of 2704	1164	cmd.exe	82
PID 1164 wrote to memory of 4188	1164	cmd.exe	85
PID 1164 wrote to memory of 4188	1164	cmd.exe	85
PID 1076 wrote to memory of 864	1076	svchost.exe	87
PID 1076 wrote to memory of 864	1076	svchost.exe	87
PID 864 wrote to memory of 760	864	cmd.exe	89
PID 864 wrote to memory of 760	864	cmd.exe	89
PID 864 wrote to memory of 2144	864	cmd.exe	90
PID 864 wrote to memory of 2144	864	cmd.exe	90
PID 1076 wrote to memory of 924	1076	svchost.exe	91
PID 1076 wrote to memory of 924	1076	svchost.exe	91
PID 924 wrote to memory of 1948	924	cmd.exe	93
PID 924 wrote to memory of 1948	924	cmd.exe	93
PID 1076 wrote to memory of 4300	1076	svchost.exe	97
PID 1076 wrote to memory of 4300	1076	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.
persistence

Query Registry
T1012
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\source\Cov29Cry.exe
"C:\Users\Admin\AppData\Local\Temp\source\Cov29Cry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3088
- 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:1076
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1164
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2704
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:4188
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:864
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:760
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2144
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:924
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1948
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\covid29-is-here.txt
    3⤵
    PID:4300

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4860

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2280

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2696

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:3164

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Management Instrumentation

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

T1006

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
103KB

MD5
8bcd083e16af6c15e14520d5a0bd7e6a

SHA1
c4d2f35d1fdb295db887f31bbc9237ac9263d782

SHA256
b4f78ff66dc3f5f8ddd694166e6b596d533830792f9b5f1634d3f5f17d6a884a

SHA512
35999577be0626b50eeab65b493d48af2ab42b699f7241d2780647bf7d72069216d99f5f708337a109e79b9c9229613b8341f44c6d96245fd1f3ac9f05814d6a

Download Submit
C:\Users\Admin\Desktop\covid29-is-here.txt

Filesize
861B

MD5
c53dee51c26d1d759667c25918d3ed10

SHA1
da194c2de15b232811ba9d43a46194d9729507f0

SHA256
dd5b3d185ae1809407e7822de4fced945115b48cc33b2950a8da9ebd77a68c52

SHA512
da41cef03f1b5f21a1fca2cfbf1b2b180c261a75d391be3a1ba36e8d4d4aefab8db024391bbee06b99de0cb0b8eb8c89f2a304c27e20c0af171b77db33b2d12c

Download Submit
memory/1076-14-0x00007FFBF58D0000-0x00007FFBF6392000-memory.dmp

Filesize
10.8MB

Download
memory/1076-69-0x00007FFBF58D0000-0x00007FFBF6392000-memory.dmp

Filesize
10.8MB

Download
memory/3088-0-0x00007FFBF58D3000-0x00007FFBF58D5000-memory.dmp

Filesize
8KB

Download
memory/3088-1-0x0000000000010000-0x0000000000030000-memory.dmp

Filesize
128KB

Download