chaos | 0d9fcb8894240750cb5e4222ea78572aba6618eb5297c2069588ceb979d52d8b

Resubmissions

13-07-2024 09:54

240713-lxcvgawdmn 10

13-07-2024 09:52

240713-lv46yawdkj 10

13-07-2024 09:46

240713-lrz3tayajc 10

Analysis

max time kernel
720s
max time network
726s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
13-07-2024 09:52

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General

Target

290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe
Size

3.8MB
MD5

3566f930e73eacee6933e672c1085d98
SHA1

d6c5408fabbf943721946073c80049c3c65f8c8d
SHA256

290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451
SHA512

09e5edcc5fe7a8e6dac63690eb1c8674541993c5a10130db7ed3cee90d802705dc07a0b13612c6326b9462145dcac35e136b12555096e0ee8577e00c3aab69af
SSDEEP

24576:TbnWYoXXBzGmL53TaX+vnyuNMOCig82RfVL0K1RWLghaPZUwB74amJl4aOLW6u3r:/W3XXBzhaWBq8Yy8kZmzJ/m

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
behavioral3/memory/1948-1-0x0000000000840000-0x0000000000C1C000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	family_chaos
behavioral3/memory/1944-7-0x0000000000D80000-0x000000000115C000-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
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
ransomware evasion

Inhibit System Recovery
T1490

Processes:

bcdedit.exebcdedit.exe

pid process

1504 bcdedit.exe
2108 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

1756 wbadmin.exe

pid	process
1504	bcdedit.exe
2108	bcdedit.exe

pid	process
1756	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

1944 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
1944	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
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\Contacts\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\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\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Public\Music\Sample Music\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\Libraries\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\AppData\Roaming\Microsoft\Windows\Start Menu\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\Accessories\System Tools\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\Videos\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\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2212144002-1172735686-1556890956-1000\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2212144002-1172735686-1556890956-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1eigd7w76.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

Processes:

vssadmin.exe

pid process

1356 vssadmin.exe
Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

2344 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

1944 svchost.exe

pid	process
1356	vssadmin.exe

pid	process
2344	NOTEPAD.EXE

pid	process
1944	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exesvchost.exe

pid	process
1948	290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe
1948	290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe
1948	290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe
1944	svchost.exe
1944	svchost.exe
1944	svchost.exe
1944	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	1948	290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe
Token: SeDebugPrivilege	1944	svchost.exe
Token: SeBackupPrivilege	1192	vssvc.exe
Token: SeRestorePrivilege	1192	vssvc.exe
Token: SeAuditPrivilege	1192	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1928	WMIC.exe
Token: SeSecurityPrivilege	1928	WMIC.exe
Token: SeTakeOwnershipPrivilege	1928	WMIC.exe
Token: SeLoadDriverPrivilege	1928	WMIC.exe
Token: SeSystemProfilePrivilege	1928	WMIC.exe
Token: SeSystemtimePrivilege	1928	WMIC.exe
Token: SeProfSingleProcessPrivilege	1928	WMIC.exe
Token: SeIncBasePriorityPrivilege	1928	WMIC.exe
Token: SeCreatePagefilePrivilege	1928	WMIC.exe
Token: SeBackupPrivilege	1928	WMIC.exe
Token: SeRestorePrivilege	1928	WMIC.exe
Token: SeShutdownPrivilege	1928	WMIC.exe
Token: SeDebugPrivilege	1928	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1928	WMIC.exe
Token: SeRemoteShutdownPrivilege	1928	WMIC.exe
Token: SeUndockPrivilege	1928	WMIC.exe
Token: SeManageVolumePrivilege	1928	WMIC.exe
Token: 33	1928	WMIC.exe
Token: 34	1928	WMIC.exe
Token: 35	1928	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1928	WMIC.exe
Token: SeSecurityPrivilege	1928	WMIC.exe
Token: SeTakeOwnershipPrivilege	1928	WMIC.exe
Token: SeLoadDriverPrivilege	1928	WMIC.exe
Token: SeSystemProfilePrivilege	1928	WMIC.exe
Token: SeSystemtimePrivilege	1928	WMIC.exe
Token: SeProfSingleProcessPrivilege	1928	WMIC.exe
Token: SeIncBasePriorityPrivilege	1928	WMIC.exe
Token: SeCreatePagefilePrivilege	1928	WMIC.exe
Token: SeBackupPrivilege	1928	WMIC.exe
Token: SeRestorePrivilege	1928	WMIC.exe
Token: SeShutdownPrivilege	1928	WMIC.exe
Token: SeDebugPrivilege	1928	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1928	WMIC.exe
Token: SeRemoteShutdownPrivilege	1928	WMIC.exe
Token: SeUndockPrivilege	1928	WMIC.exe
Token: SeManageVolumePrivilege	1928	WMIC.exe
Token: 33	1928	WMIC.exe
Token: 34	1928	WMIC.exe
Token: 35	1928	WMIC.exe
Token: SeBackupPrivilege	2064	wbengine.exe
Token: SeRestorePrivilege	2064	wbengine.exe
Token: SeSecurityPrivilege	2064	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exesvchost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1948 wrote to memory of 1944	1948	290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe	svchost.exe
PID 1948 wrote to memory of 1944	1948	290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe	svchost.exe
PID 1948 wrote to memory of 1944	1948	290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe	svchost.exe
PID 1944 wrote to memory of 1656	1944	svchost.exe	cmd.exe
PID 1944 wrote to memory of 1656	1944	svchost.exe	cmd.exe
PID 1944 wrote to memory of 1656	1944	svchost.exe	cmd.exe
PID 1656 wrote to memory of 1356	1656	cmd.exe	vssadmin.exe
PID 1656 wrote to memory of 1356	1656	cmd.exe	vssadmin.exe
PID 1656 wrote to memory of 1356	1656	cmd.exe	vssadmin.exe
PID 1656 wrote to memory of 1928	1656	cmd.exe	WMIC.exe
PID 1656 wrote to memory of 1928	1656	cmd.exe	WMIC.exe
PID 1656 wrote to memory of 1928	1656	cmd.exe	WMIC.exe
PID 1944 wrote to memory of 276	1944	svchost.exe	cmd.exe
PID 1944 wrote to memory of 276	1944	svchost.exe	cmd.exe
PID 1944 wrote to memory of 276	1944	svchost.exe	cmd.exe
PID 276 wrote to memory of 1504	276	cmd.exe	bcdedit.exe
PID 276 wrote to memory of 1504	276	cmd.exe	bcdedit.exe
PID 276 wrote to memory of 1504	276	cmd.exe	bcdedit.exe
PID 276 wrote to memory of 2108	276	cmd.exe	bcdedit.exe
PID 276 wrote to memory of 2108	276	cmd.exe	bcdedit.exe
PID 276 wrote to memory of 2108	276	cmd.exe	bcdedit.exe
PID 1944 wrote to memory of 1956	1944	svchost.exe	cmd.exe
PID 1944 wrote to memory of 1956	1944	svchost.exe	cmd.exe
PID 1944 wrote to memory of 1956	1944	svchost.exe	cmd.exe
PID 1956 wrote to memory of 1756	1956	cmd.exe	wbadmin.exe
PID 1956 wrote to memory of 1756	1956	cmd.exe	wbadmin.exe
PID 1956 wrote to memory of 1756	1956	cmd.exe	wbadmin.exe
PID 1944 wrote to memory of 2344	1944	svchost.exe	NOTEPAD.EXE
PID 1944 wrote to memory of 2344	1944	svchost.exe	NOTEPAD.EXE
PID 1944 wrote to memory of 2344	1944	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\290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe
"C:\Users\Admin\AppData\Local\Temp\290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1948

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:1944

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:1656

C:\Windows\system32\vssadmin.exe
vssadmin delete shadows /all /quiet
4⤵
- Interacts with shadow copies
PID:1356

C:\Windows\System32\Wbem\WMIC.exe
wmic shadowcopy delete
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1928

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:276

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} bootstatuspolicy ignoreallfailures
4⤵
- Modifies boot configuration data using bcdedit
PID:1504

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} recoveryenabled no
4⤵
- Modifies boot configuration data using bcdedit
PID:2108

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
3⤵
- Suspicious use of WriteProcessMemory
PID:1956

C:\Windows\system32\wbadmin.exe
wbadmin delete catalog -quiet
4⤵
- Deletes backup catalog
PID:1756

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:2344

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1192

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2064

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1720

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2288

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

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
3.8MB

MD5
3566f930e73eacee6933e672c1085d98

SHA1
d6c5408fabbf943721946073c80049c3c65f8c8d

SHA256
290072a9e1cf3872487cf586a592be534abc894d20ffd1121fe8338f1b52b451

SHA512
09e5edcc5fe7a8e6dac63690eb1c8674541993c5a10130db7ed3cee90d802705dc07a0b13612c6326b9462145dcac35e136b12555096e0ee8577e00c3aab69af

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

Filesize
1014B

MD5
59085312841064e2ebb77e26fc8c6dc7

SHA1
705016171694a907442b71ccf053386d9bc7e552

SHA256
61f532b020e4c6e1d25ef11ef5f85ab7f65a51677e9e8cdaaf41bad00fe2cad0

SHA512
6f5ba769d7ef56044ae868d02bd31ccc1ab806a887e2a1b21c52e50f3996e48637ef782ac67e979ed2ccecbc94e767510e351b3a4a29b5b84b47aa87391b8d70

Download Submit
memory/1944-7-0x0000000000D80000-0x000000000115C000-memory.dmp

Filesize
3.9MB

Download
memory/1944-8-0x000007FEF59B0000-0x000007FEF639C000-memory.dmp

Filesize
9.9MB

Download
memory/1944-13-0x000007FEF59B0000-0x000007FEF639C000-memory.dmp

Filesize
9.9MB

Download
memory/1944-450-0x000007FEF59B0000-0x000007FEF639C000-memory.dmp

Filesize
9.9MB

Download
memory/1944-451-0x000007FEF59B0000-0x000007FEF639C000-memory.dmp

Filesize
9.9MB

Download
memory/1948-0-0x000007FEF59B3000-0x000007FEF59B4000-memory.dmp

Filesize
4KB

Download
memory/1948-1-0x0000000000840000-0x0000000000C1C000-memory.dmp

Filesize
3.9MB

Download