chaos | 4710fb0bd1a6beb6f5b9cbb88a3141fbaffc54341f146570a7aac42df2938588

General

Target

2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exe
Size

22KB
MD5

af51c1a91ec1249730d7b22979cc7c42
SHA1

5285d86451c719a0b0c0eb833ac227772488436d
SHA256

4710fb0bd1a6beb6f5b9cbb88a3141fbaffc54341f146570a7aac42df2938588
SHA512

b2fcd6dcefb8b672b5c9d27fcd08f0858fc46e58b2f73511d4aaa2fea63d68fb3ac0b5e8a0ea6375227fc5a26a8dfc48b116225397aea6b7b9165a348c3a55e0
SSDEEP

384:U3Mg/bqo2pOv0tpDnqp+Ao4+X0Z/zJHr91C8OWhneK:qqo2EDp+J4+kRVHr9hLJeK

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\Documents\read_it.txt

Ransom Note

!!! ATTENTION !!! Your device has been locked by our ransomware. To regain access to your device and your files, you must pay a ransom of : $100 USD in Bitcoin. Bitcoin Address: bc1qgk07vhn53ws7khy3840gjjvlw7qgzftfjgweq2 Once payment is made, please send an email to [email protected] with the transaction ID as proof of payment. Upon confirmation of your payment, you will receive instructions on how to unlock your device. !!! ATTENTION !!!

Emails

[email protected]

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2820-0-0x00000000001F0000-0x00000000001FC000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	family_chaos
behavioral1/memory/2204-7-0x0000000000B50000-0x0000000000B5C000-memory.dmp	family_chaos

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Detects command variations typically used by ransomware 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2820-0-0x00000000001F0000-0x00000000001FC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
C:\Users\Admin\AppData\Roaming\svchost.exe	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2204-7-0x0000000000B50000-0x0000000000B5C000-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

1740 bcdedit.exe
1676 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

2244 wbadmin.exe

pid	process
1740	bcdedit.exe
1676	bcdedit.exe

pid	process
2244	wbadmin.exe

Drops startup file 3 IoCs

Processes:

svchost.exe

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\read_it.txt	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

2204 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
2204	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
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\AppData\Roaming\Microsoft\Windows\Libraries\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\Documents\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\Start Menu\Programs\Accessories\Accessibility\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\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\Recent\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3627615824-4061627003-3019543961-1000\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\SendTo\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\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Documents\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\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	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

2212 vssadmin.exe
Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

2340 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

2204 svchost.exe

pid	process
2212	vssadmin.exe

pid	process
2340	NOTEPAD.EXE

pid	process
2204	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exesvchost.exe

pid	process
2820	2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exe
2820	2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exe
2204	svchost.exe
2204	svchost.exe
2204	svchost.exe
2204	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	2820	2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exe
Token: SeDebugPrivilege	2204	svchost.exe
Token: SeBackupPrivilege	2912	vssvc.exe
Token: SeRestorePrivilege	2912	vssvc.exe
Token: SeAuditPrivilege	2912	vssvc.exe
Token: SeIncreaseQuotaPrivilege	948	WMIC.exe
Token: SeSecurityPrivilege	948	WMIC.exe
Token: SeTakeOwnershipPrivilege	948	WMIC.exe
Token: SeLoadDriverPrivilege	948	WMIC.exe
Token: SeSystemProfilePrivilege	948	WMIC.exe
Token: SeSystemtimePrivilege	948	WMIC.exe
Token: SeProfSingleProcessPrivilege	948	WMIC.exe
Token: SeIncBasePriorityPrivilege	948	WMIC.exe
Token: SeCreatePagefilePrivilege	948	WMIC.exe
Token: SeBackupPrivilege	948	WMIC.exe
Token: SeRestorePrivilege	948	WMIC.exe
Token: SeShutdownPrivilege	948	WMIC.exe
Token: SeDebugPrivilege	948	WMIC.exe
Token: SeSystemEnvironmentPrivilege	948	WMIC.exe
Token: SeRemoteShutdownPrivilege	948	WMIC.exe
Token: SeUndockPrivilege	948	WMIC.exe
Token: SeManageVolumePrivilege	948	WMIC.exe
Token: 33	948	WMIC.exe
Token: 34	948	WMIC.exe
Token: 35	948	WMIC.exe
Token: SeIncreaseQuotaPrivilege	948	WMIC.exe
Token: SeSecurityPrivilege	948	WMIC.exe
Token: SeTakeOwnershipPrivilege	948	WMIC.exe
Token: SeLoadDriverPrivilege	948	WMIC.exe
Token: SeSystemProfilePrivilege	948	WMIC.exe
Token: SeSystemtimePrivilege	948	WMIC.exe
Token: SeProfSingleProcessPrivilege	948	WMIC.exe
Token: SeIncBasePriorityPrivilege	948	WMIC.exe
Token: SeCreatePagefilePrivilege	948	WMIC.exe
Token: SeBackupPrivilege	948	WMIC.exe
Token: SeRestorePrivilege	948	WMIC.exe
Token: SeShutdownPrivilege	948	WMIC.exe
Token: SeDebugPrivilege	948	WMIC.exe
Token: SeSystemEnvironmentPrivilege	948	WMIC.exe
Token: SeRemoteShutdownPrivilege	948	WMIC.exe
Token: SeUndockPrivilege	948	WMIC.exe
Token: SeManageVolumePrivilege	948	WMIC.exe
Token: 33	948	WMIC.exe
Token: 34	948	WMIC.exe
Token: 35	948	WMIC.exe
Token: SeBackupPrivilege	2232	wbengine.exe
Token: SeRestorePrivilege	2232	wbengine.exe
Token: SeSecurityPrivilege	2232	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exesvchost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 2820 wrote to memory of 2204	2820	2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exe	svchost.exe
PID 2820 wrote to memory of 2204	2820	2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exe	svchost.exe
PID 2820 wrote to memory of 2204	2820	2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exe	svchost.exe
PID 2204 wrote to memory of 2496	2204	svchost.exe	cmd.exe
PID 2204 wrote to memory of 2496	2204	svchost.exe	cmd.exe
PID 2204 wrote to memory of 2496	2204	svchost.exe	cmd.exe
PID 2496 wrote to memory of 2212	2496	cmd.exe	vssadmin.exe
PID 2496 wrote to memory of 2212	2496	cmd.exe	vssadmin.exe
PID 2496 wrote to memory of 2212	2496	cmd.exe	vssadmin.exe
PID 2496 wrote to memory of 948	2496	cmd.exe	WMIC.exe
PID 2496 wrote to memory of 948	2496	cmd.exe	WMIC.exe
PID 2496 wrote to memory of 948	2496	cmd.exe	WMIC.exe
PID 2204 wrote to memory of 1584	2204	svchost.exe	cmd.exe
PID 2204 wrote to memory of 1584	2204	svchost.exe	cmd.exe
PID 2204 wrote to memory of 1584	2204	svchost.exe	cmd.exe
PID 1584 wrote to memory of 1740	1584	cmd.exe	bcdedit.exe
PID 1584 wrote to memory of 1740	1584	cmd.exe	bcdedit.exe
PID 1584 wrote to memory of 1740	1584	cmd.exe	bcdedit.exe
PID 1584 wrote to memory of 1676	1584	cmd.exe	bcdedit.exe
PID 1584 wrote to memory of 1676	1584	cmd.exe	bcdedit.exe
PID 1584 wrote to memory of 1676	1584	cmd.exe	bcdedit.exe
PID 2204 wrote to memory of 2900	2204	svchost.exe	cmd.exe
PID 2204 wrote to memory of 2900	2204	svchost.exe	cmd.exe
PID 2204 wrote to memory of 2900	2204	svchost.exe	cmd.exe
PID 2900 wrote to memory of 2244	2900	cmd.exe	wbadmin.exe
PID 2900 wrote to memory of 2244	2900	cmd.exe	wbadmin.exe
PID 2900 wrote to memory of 2244	2900	cmd.exe	wbadmin.exe
PID 2204 wrote to memory of 2340	2204	svchost.exe	NOTEPAD.EXE
PID 2204 wrote to memory of 2340	2204	svchost.exe	NOTEPAD.EXE
PID 2204 wrote to memory of 2340	2204	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\2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-29_af51c1a91ec1249730d7b22979cc7c42_chaos_destroyer_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2820

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)
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2204

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:2496

C:\Windows\system32\vssadmin.exe
vssadmin delete shadows /all /quiet
4⤵
- Interacts with shadow copies
PID:2212

C:\Windows\System32\Wbem\WMIC.exe
wmic shadowcopy delete
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:948

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:1584

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} bootstatuspolicy ignoreallfailures
4⤵
- Modifies boot configuration data using bcdedit
PID:1740

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} recoveryenabled no
4⤵
- Modifies boot configuration data using bcdedit
PID:1676

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
3⤵
- Suspicious use of WriteProcessMemory
PID:2900

C:\Windows\system32\wbadmin.exe
wbadmin delete catalog -quiet
4⤵
- Deletes backup catalog
PID:2244

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
3⤵
- Opens file in notepad (likely ransom note)
PID:2340

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2912

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2232

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1428

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:488

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

3

T1070

File Deletion

3

T1070.004

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Inhibit System Recovery

4

T1490

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
22KB

MD5
af51c1a91ec1249730d7b22979cc7c42

SHA1
5285d86451c719a0b0c0eb833ac227772488436d

SHA256
4710fb0bd1a6beb6f5b9cbb88a3141fbaffc54341f146570a7aac42df2938588

SHA512
b2fcd6dcefb8b672b5c9d27fcd08f0858fc46e58b2f73511d4aaa2fea63d68fb3ac0b5e8a0ea6375227fc5a26a8dfc48b116225397aea6b7b9165a348c3a55e0

Download Submit
C:\Users\Admin\Documents\read_it.txt
Filesize
462B

MD5
9ef56b0438e82e07aa14fb9481d10b18

SHA1
b4d069b4737d9f32d07618d83650f7c1ed3bf6eb

SHA256
ae7ff3ea3c8870144b97cde602f5e84f8a365939cf127fafa38a5309f29b69d3

SHA512
a7f14c7f8b01ef7c21e2350e9b9efdcbb8d533197b63d7bc50d4c75a2190a2fc5633698a532ed07a186333097dd08991852721051d255d1bf2cfc9356cdf523d

Download Submit
memory/2204-7-0x0000000000B50000-0x0000000000B5C000-memory.dmp

Filesize
48KB

Download
memory/2204-9-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download
memory/2204-11-0x000000001AC70000-0x000000001ACF0000-memory.dmp

Filesize
512KB

Download
memory/2204-440-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download
memory/2204-441-0x000000001AC70000-0x000000001ACF0000-memory.dmp

Filesize
512KB

Download
memory/2820-0-0x00000000001F0000-0x00000000001FC000-memory.dmp

Filesize
48KB

Download
memory/2820-1-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download
memory/2820-8-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads