chaos | 524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4

General

Target

524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe
Size

3.2MB
MD5

db5c28ec647afd894c01422584d551a5
SHA1

fa0b5ebcb983509eebc7222725792976fad2aca8
SHA256

524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4
SHA512

730054505deddeeefce4b1cc3b8ea362946e9e12ea289bc64285c0ce417d8964a767d03ccdf69ab4dd184d9888b9f3c1b51134cfb9c067861b5c1f4c06a3f67a
SSDEEP

24576:s0JR6V45PL2ybTlBpPcmtR9tArJms0dIU1wuKav4WgNFlLKKDGyMgl+ICHusEd:5iylZ9tAcBSGgJtAZu

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

Processes:

resource	yara_rule
behavioral1/memory/2240-1-0x00000000013D0000-0x000000000170C000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	family_chaos
behavioral1/memory/2480-8-0x0000000000080000-0x00000000003BC000-memory.dmp	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

Detects command variations typically used by ransomware 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2240-1-0x00000000013D0000-0x000000000170C000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
C:\Users\Admin\AppData\Roaming\svchost.exe	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2480-8-0x0000000000080000-0x00000000003BC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
ransomware evasion

Inhibit System Recovery
T1490

Processes:

bcdedit.exebcdedit.exe

pid process

2800 bcdedit.exe
1788 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

Processes:

wbadmin.exe

pid process

2288 wbadmin.exe

pid	process
2800	bcdedit.exe
1788	bcdedit.exe

pid	process
2288	wbadmin.exe

Drops startup file 3 IoCs

Processes:

svchost.exe

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\Leggimi.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

Processes:

svchost.exe

pid process

2480 svchost.exe
Reads user/profile data of web browsers 2 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

pid	process
2480	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3452737119-3959686427-228443150-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\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\Accessories\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\Windows\Libraries\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\Saved Games\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\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\Administrative Tools\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\Documents\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\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\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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\Windows\Recent\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\s8kroabh7.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 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Processes:

vssadmin.exe

pid process

872 vssadmin.exe
Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

628 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

2480 svchost.exe

pid	process
872	vssadmin.exe

pid	process
628	NOTEPAD.EXE

pid	process
2480	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exesvchost.exe

pid	process
2240	524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe
2240	524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe
2480	svchost.exe
2480	svchost.exe
2480	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	2240	524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe
Token: SeDebugPrivilege	2480	svchost.exe
Token: SeBackupPrivilege	1696	vssvc.exe
Token: SeRestorePrivilege	1696	vssvc.exe
Token: SeAuditPrivilege	1696	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1740	WMIC.exe
Token: SeSecurityPrivilege	1740	WMIC.exe
Token: SeTakeOwnershipPrivilege	1740	WMIC.exe
Token: SeLoadDriverPrivilege	1740	WMIC.exe
Token: SeSystemProfilePrivilege	1740	WMIC.exe
Token: SeSystemtimePrivilege	1740	WMIC.exe
Token: SeProfSingleProcessPrivilege	1740	WMIC.exe
Token: SeIncBasePriorityPrivilege	1740	WMIC.exe
Token: SeCreatePagefilePrivilege	1740	WMIC.exe
Token: SeBackupPrivilege	1740	WMIC.exe
Token: SeRestorePrivilege	1740	WMIC.exe
Token: SeShutdownPrivilege	1740	WMIC.exe
Token: SeDebugPrivilege	1740	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1740	WMIC.exe
Token: SeRemoteShutdownPrivilege	1740	WMIC.exe
Token: SeUndockPrivilege	1740	WMIC.exe
Token: SeManageVolumePrivilege	1740	WMIC.exe
Token: 33	1740	WMIC.exe
Token: 34	1740	WMIC.exe
Token: 35	1740	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1740	WMIC.exe
Token: SeSecurityPrivilege	1740	WMIC.exe
Token: SeTakeOwnershipPrivilege	1740	WMIC.exe
Token: SeLoadDriverPrivilege	1740	WMIC.exe
Token: SeSystemProfilePrivilege	1740	WMIC.exe
Token: SeSystemtimePrivilege	1740	WMIC.exe
Token: SeProfSingleProcessPrivilege	1740	WMIC.exe
Token: SeIncBasePriorityPrivilege	1740	WMIC.exe
Token: SeCreatePagefilePrivilege	1740	WMIC.exe
Token: SeBackupPrivilege	1740	WMIC.exe
Token: SeRestorePrivilege	1740	WMIC.exe
Token: SeShutdownPrivilege	1740	WMIC.exe
Token: SeDebugPrivilege	1740	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1740	WMIC.exe
Token: SeRemoteShutdownPrivilege	1740	WMIC.exe
Token: SeUndockPrivilege	1740	WMIC.exe
Token: SeManageVolumePrivilege	1740	WMIC.exe
Token: 33	1740	WMIC.exe
Token: 34	1740	WMIC.exe
Token: 35	1740	WMIC.exe
Token: SeBackupPrivilege	860	wbengine.exe
Token: SeRestorePrivilege	860	wbengine.exe
Token: SeSecurityPrivilege	860	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exesvchost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 2240 wrote to memory of 2480	2240	524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe	svchost.exe
PID 2240 wrote to memory of 2480	2240	524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe	svchost.exe
PID 2240 wrote to memory of 2480	2240	524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe	svchost.exe
PID 2480 wrote to memory of 1796	2480	svchost.exe	cmd.exe
PID 2480 wrote to memory of 1796	2480	svchost.exe	cmd.exe
PID 2480 wrote to memory of 1796	2480	svchost.exe	cmd.exe
PID 1796 wrote to memory of 872	1796	cmd.exe	vssadmin.exe
PID 1796 wrote to memory of 872	1796	cmd.exe	vssadmin.exe
PID 1796 wrote to memory of 872	1796	cmd.exe	vssadmin.exe
PID 1796 wrote to memory of 1740	1796	cmd.exe	WMIC.exe
PID 1796 wrote to memory of 1740	1796	cmd.exe	WMIC.exe
PID 1796 wrote to memory of 1740	1796	cmd.exe	WMIC.exe
PID 2480 wrote to memory of 1424	2480	svchost.exe	cmd.exe
PID 2480 wrote to memory of 1424	2480	svchost.exe	cmd.exe
PID 2480 wrote to memory of 1424	2480	svchost.exe	cmd.exe
PID 1424 wrote to memory of 2800	1424	cmd.exe	bcdedit.exe
PID 1424 wrote to memory of 2800	1424	cmd.exe	bcdedit.exe
PID 1424 wrote to memory of 2800	1424	cmd.exe	bcdedit.exe
PID 1424 wrote to memory of 1788	1424	cmd.exe	bcdedit.exe
PID 1424 wrote to memory of 1788	1424	cmd.exe	bcdedit.exe
PID 1424 wrote to memory of 1788	1424	cmd.exe	bcdedit.exe
PID 2480 wrote to memory of 912	2480	svchost.exe	cmd.exe
PID 2480 wrote to memory of 912	2480	svchost.exe	cmd.exe
PID 2480 wrote to memory of 912	2480	svchost.exe	cmd.exe
PID 912 wrote to memory of 2288	912	cmd.exe	wbadmin.exe
PID 912 wrote to memory of 2288	912	cmd.exe	wbadmin.exe
PID 912 wrote to memory of 2288	912	cmd.exe	wbadmin.exe
PID 2480 wrote to memory of 628	2480	svchost.exe	NOTEPAD.EXE
PID 2480 wrote to memory of 628	2480	svchost.exe	NOTEPAD.EXE
PID 2480 wrote to memory of 628	2480	svchost.exe	NOTEPAD.EXE

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\524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe
"C:\Users\Admin\AppData\Local\Temp\524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2240

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:2480

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:1796

C:\Windows\system32\vssadmin.exe
vssadmin delete shadows /all /quiet
4⤵
- Interacts with shadow copies
PID:872

C:\Windows\System32\Wbem\WMIC.exe
wmic shadowcopy delete
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1740

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:1424

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} bootstatuspolicy ignoreallfailures
4⤵
- Modifies boot configuration data using bcdedit
PID:2800

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} recoveryenabled no
4⤵
- Modifies boot configuration data using bcdedit
PID:1788

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
3⤵
- Suspicious use of WriteProcessMemory
PID:912

C:\Windows\system32\wbadmin.exe
wbadmin delete catalog -quiet
4⤵
- Deletes backup catalog
PID:2288

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Leggimi.txt
3⤵
- Opens file in notepad (likely ransom note)
PID:628

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1696

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:860

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1492

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1576

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Management Instrumentation

1

T1047

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

3

T1070

File Deletion

Modify Registry

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Defacement

1

T1491

Inhibit System Recovery

4

T1490

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
3.2MB

MD5
db5c28ec647afd894c01422584d551a5

SHA1
fa0b5ebcb983509eebc7222725792976fad2aca8

SHA256
524a898e18999ceac864dbac5b85fa2f14392e389b3c32f77d58e2a89cdf01c4

SHA512
730054505deddeeefce4b1cc3b8ea362946e9e12ea289bc64285c0ce417d8964a767d03ccdf69ab4dd184d9888b9f3c1b51134cfb9c067861b5c1f4c06a3f67a

Download Submit
C:\Users\Admin\Documents\Leggimi.txt
Filesize
437B

MD5
9c5d9fd5db486b31324ad8eef0558c1b

SHA1
4d6e0b43ae59b8420730294d371118d6e429157f

SHA256
1f2154533308355548ad3694f03cc1582bc0aa549173a5d11920ac38469d6f3b

SHA512
b5c27756cbf8756dcfea07c6134e8711b61fcaa87360056609d65354e845adf2f00bc05140bf40044675b7c6cc7ef0b546bad3886a4cf34d12251570b49e80f7

Download Submit
memory/2240-0-0x000007FEF5843000-0x000007FEF5844000-memory.dmp

Filesize
4KB

Download
memory/2240-1-0x00000000013D0000-0x000000000170C000-memory.dmp

Filesize
3.2MB

Download
memory/2240-2-0x000007FEF5843000-0x000007FEF5844000-memory.dmp

Filesize
4KB

Download
memory/2480-8-0x0000000000080000-0x00000000003BC000-memory.dmp

Filesize
3.2MB

Download
memory/2480-10-0x000007FEF5840000-0x000007FEF622C000-memory.dmp

Filesize
9.9MB

Download
memory/2480-11-0x000007FEF5840000-0x000007FEF622C000-memory.dmp

Filesize
9.9MB

Download
memory/2480-493-0x000007FEF5840000-0x000007FEF622C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads