chaos | b4f78ff66dc3f5f8ddd694166e6b596d533830792f9b5f1634d3f5f17d6a884a

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-02-2025 07:19

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General

Target

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 3 IoCs

resource	yara_rule
behavioral1/memory/2360-1-0x0000000001290000-0x00000000012B0000-memory.dmp	family_chaos
behavioral1/files/0x000a000000012281-5.dat	family_chaos
behavioral1/memory/1804-7-0x00000000010F0000-0x0000000001110000-memory.dmp	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
2004	bcdedit.exe
2800	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
2992	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
1804	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\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-4177215427-74451935-3209572229-1000\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\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\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\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\Public\Pictures\Sample Pictures\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\Music\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\Desktop\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\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\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\Sample Music\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\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\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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-1-5-21-4177215427-74451935-3209572229-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\rrtap8ox1.jpg"	svchost.exe

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

System Information Discovery
T1082

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
2556	vssadmin.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1804	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2360	Cov29Cry.exe
2360	Cov29Cry.exe
2360	Cov29Cry.exe
1804	svchost.exe
1804	svchost.exe
1804	svchost.exe
1804	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2360	Cov29Cry.exe
Token: SeDebugPrivilege	1804	svchost.exe
Token: SeBackupPrivilege	2624	vssvc.exe
Token: SeRestorePrivilege	2624	vssvc.exe
Token: SeAuditPrivilege	2624	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1664	WMIC.exe
Token: SeSecurityPrivilege	1664	WMIC.exe
Token: SeTakeOwnershipPrivilege	1664	WMIC.exe
Token: SeLoadDriverPrivilege	1664	WMIC.exe
Token: SeSystemProfilePrivilege	1664	WMIC.exe
Token: SeSystemtimePrivilege	1664	WMIC.exe
Token: SeProfSingleProcessPrivilege	1664	WMIC.exe
Token: SeIncBasePriorityPrivilege	1664	WMIC.exe
Token: SeCreatePagefilePrivilege	1664	WMIC.exe
Token: SeBackupPrivilege	1664	WMIC.exe
Token: SeRestorePrivilege	1664	WMIC.exe
Token: SeShutdownPrivilege	1664	WMIC.exe
Token: SeDebugPrivilege	1664	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1664	WMIC.exe
Token: SeRemoteShutdownPrivilege	1664	WMIC.exe
Token: SeUndockPrivilege	1664	WMIC.exe
Token: SeManageVolumePrivilege	1664	WMIC.exe
Token: 33	1664	WMIC.exe
Token: 34	1664	WMIC.exe
Token: 35	1664	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1664	WMIC.exe
Token: SeSecurityPrivilege	1664	WMIC.exe
Token: SeTakeOwnershipPrivilege	1664	WMIC.exe
Token: SeLoadDriverPrivilege	1664	WMIC.exe
Token: SeSystemProfilePrivilege	1664	WMIC.exe
Token: SeSystemtimePrivilege	1664	WMIC.exe
Token: SeProfSingleProcessPrivilege	1664	WMIC.exe
Token: SeIncBasePriorityPrivilege	1664	WMIC.exe
Token: SeCreatePagefilePrivilege	1664	WMIC.exe
Token: SeBackupPrivilege	1664	WMIC.exe
Token: SeRestorePrivilege	1664	WMIC.exe
Token: SeShutdownPrivilege	1664	WMIC.exe
Token: SeDebugPrivilege	1664	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1664	WMIC.exe
Token: SeRemoteShutdownPrivilege	1664	WMIC.exe
Token: SeUndockPrivilege	1664	WMIC.exe
Token: SeManageVolumePrivilege	1664	WMIC.exe
Token: 33	1664	WMIC.exe
Token: 34	1664	WMIC.exe
Token: 35	1664	WMIC.exe
Token: SeBackupPrivilege	2968	wbengine.exe
Token: SeRestorePrivilege	2968	wbengine.exe
Token: SeSecurityPrivilege	2968	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 1804	2360	Cov29Cry.exe	31
PID 2360 wrote to memory of 1804	2360	Cov29Cry.exe	31
PID 2360 wrote to memory of 1804	2360	Cov29Cry.exe	31
PID 1804 wrote to memory of 2600	1804	svchost.exe	32
PID 1804 wrote to memory of 2600	1804	svchost.exe	32
PID 1804 wrote to memory of 2600	1804	svchost.exe	32
PID 2600 wrote to memory of 2556	2600	cmd.exe	34
PID 2600 wrote to memory of 2556	2600	cmd.exe	34
PID 2600 wrote to memory of 2556	2600	cmd.exe	34
PID 2600 wrote to memory of 1664	2600	cmd.exe	38
PID 2600 wrote to memory of 1664	2600	cmd.exe	38
PID 2600 wrote to memory of 1664	2600	cmd.exe	38
PID 1804 wrote to memory of 2776	1804	svchost.exe	40
PID 1804 wrote to memory of 2776	1804	svchost.exe	40
PID 1804 wrote to memory of 2776	1804	svchost.exe	40
PID 2776 wrote to memory of 2004	2776	cmd.exe	42
PID 2776 wrote to memory of 2004	2776	cmd.exe	42
PID 2776 wrote to memory of 2004	2776	cmd.exe	42
PID 2776 wrote to memory of 2800	2776	cmd.exe	43
PID 2776 wrote to memory of 2800	2776	cmd.exe	43
PID 2776 wrote to memory of 2800	2776	cmd.exe	43
PID 1804 wrote to memory of 272	1804	svchost.exe	44
PID 1804 wrote to memory of 272	1804	svchost.exe	44
PID 1804 wrote to memory of 272	1804	svchost.exe	44
PID 272 wrote to memory of 2992	272	cmd.exe	46
PID 272 wrote to memory of 2992	272	cmd.exe	46
PID 272 wrote to memory of 2992	272	cmd.exe	46
PID 1804 wrote to memory of 2000	1804	svchost.exe	50
PID 1804 wrote to memory of 2000	1804	svchost.exe	50
PID 1804 wrote to memory of 2000	1804	svchost.exe	50

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\Cov29Cry.exe
"C:\Users\Admin\AppData\Local\Temp\Cov29Cry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2360
- 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
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1804
- - 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:2600
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2556
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1664
- - 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:2776
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2004
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2800
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:272
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2992
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\covid29-is-here.txt
    3⤵
    PID:2000

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2624

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2968

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1792

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2516

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

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/1804-7-0x00000000010F0000-0x0000000001110000-memory.dmp

Filesize
128KB

Download
memory/1804-8-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

Filesize
9.9MB

Download
memory/1804-74-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

Filesize
9.9MB

Download
memory/1804-75-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

Filesize
9.9MB

Download
memory/2360-0-0x000007FEF5A13000-0x000007FEF5A14000-memory.dmp

Filesize
4KB

Download
memory/2360-1-0x0000000001290000-0x00000000012B0000-memory.dmp

Filesize
128KB

Download