chaos | b7e12bf54356d831e3d7b5e10b0c1782a3e2feb29dd6ed3857c3922d2b48c7c1

General

Target

main.exe
Size

330KB
MD5

3736a823e68e0624d6a97e26404912c9
SHA1

3dc5eac263f2a10eefe1f4d16932623aabdcecc3
SHA256

b7e12bf54356d831e3d7b5e10b0c1782a3e2feb29dd6ed3857c3922d2b48c7c1
SHA512

902955e4c95a5d8840b0ced7cfb4838b59a75f5a87ec694d426c01476c3f64974039d4f6310464777adc78d433a0dd455092db0a8d27381146351be931143cfb
SSDEEP

6144:GB4Rr95aqSX2mLCHpdgwNNMLv6Cwm33BL5uK8v:GB4ARX2mLCJdgwNNWg8BLAK8v

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3888-0-0x00000000007E0000-0x0000000000838000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	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
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
ransomware evasion

Inhibit System Recovery
T1490

Processes:

bcdedit.exebcdedit.exe

pid process

4176 bcdedit.exe
5052 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

1560 wbadmin.exe

pid	process
4176	bcdedit.exe
5052	bcdedit.exe

pid	process
1560	wbadmin.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

svchost.exemain.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	svchost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	main.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\Message.txt	svchost.exe
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

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

4236 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
4236	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Saved Games\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\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\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\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\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\Public\Videos\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-259785868-298165991-4178590326-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\Internet Explorer\Quick Launch\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\SendTo\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\System Tools\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\Pictures\Camera Roll\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\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\Recent\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\Public\Pictures\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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ohslu74u3.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

Processes:

vds.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_DADY&PROD_HARDDISK\4&215468A5&0&000000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\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

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

724 vssadmin.exe
Modifies registry class 1 IoCs

Processes:

svchost.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\Local Settings svchost.exe
Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

4084 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

4236 svchost.exe

pid	process
724	vssadmin.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\Local Settings	svchost.exe

pid	process
4084	NOTEPAD.EXE

pid	process
4236	svchost.exe

Suspicious behavior: EnumeratesProcesses 51 IoCs

Processes:

main.exesvchost.exe

pid	process
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
3888	main.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe
4236	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

Processes:

main.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	3888	main.exe
Token: SeDebugPrivilege	4236	svchost.exe
Token: SeBackupPrivilege	2784	vssvc.exe
Token: SeRestorePrivilege	2784	vssvc.exe
Token: SeAuditPrivilege	2784	vssvc.exe
Token: SeIncreaseQuotaPrivilege	3600	WMIC.exe
Token: SeSecurityPrivilege	3600	WMIC.exe
Token: SeTakeOwnershipPrivilege	3600	WMIC.exe
Token: SeLoadDriverPrivilege	3600	WMIC.exe
Token: SeSystemProfilePrivilege	3600	WMIC.exe
Token: SeSystemtimePrivilege	3600	WMIC.exe
Token: SeProfSingleProcessPrivilege	3600	WMIC.exe
Token: SeIncBasePriorityPrivilege	3600	WMIC.exe
Token: SeCreatePagefilePrivilege	3600	WMIC.exe
Token: SeBackupPrivilege	3600	WMIC.exe
Token: SeRestorePrivilege	3600	WMIC.exe
Token: SeShutdownPrivilege	3600	WMIC.exe
Token: SeDebugPrivilege	3600	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3600	WMIC.exe
Token: SeRemoteShutdownPrivilege	3600	WMIC.exe
Token: SeUndockPrivilege	3600	WMIC.exe
Token: SeManageVolumePrivilege	3600	WMIC.exe
Token: 33	3600	WMIC.exe
Token: 34	3600	WMIC.exe
Token: 35	3600	WMIC.exe
Token: 36	3600	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3600	WMIC.exe
Token: SeSecurityPrivilege	3600	WMIC.exe
Token: SeTakeOwnershipPrivilege	3600	WMIC.exe
Token: SeLoadDriverPrivilege	3600	WMIC.exe
Token: SeSystemProfilePrivilege	3600	WMIC.exe
Token: SeSystemtimePrivilege	3600	WMIC.exe
Token: SeProfSingleProcessPrivilege	3600	WMIC.exe
Token: SeIncBasePriorityPrivilege	3600	WMIC.exe
Token: SeCreatePagefilePrivilege	3600	WMIC.exe
Token: SeBackupPrivilege	3600	WMIC.exe
Token: SeRestorePrivilege	3600	WMIC.exe
Token: SeShutdownPrivilege	3600	WMIC.exe
Token: SeDebugPrivilege	3600	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3600	WMIC.exe
Token: SeRemoteShutdownPrivilege	3600	WMIC.exe
Token: SeUndockPrivilege	3600	WMIC.exe
Token: SeManageVolumePrivilege	3600	WMIC.exe
Token: 33	3600	WMIC.exe
Token: 34	3600	WMIC.exe
Token: 35	3600	WMIC.exe
Token: 36	3600	WMIC.exe
Token: SeBackupPrivilege	552	wbengine.exe
Token: SeRestorePrivilege	552	wbengine.exe
Token: SeSecurityPrivilege	552	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

main.exesvchost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 3888 wrote to memory of 4236	3888	main.exe	svchost.exe
PID 3888 wrote to memory of 4236	3888	main.exe	svchost.exe
PID 4236 wrote to memory of 4376	4236	svchost.exe	cmd.exe
PID 4236 wrote to memory of 4376	4236	svchost.exe	cmd.exe
PID 4376 wrote to memory of 724	4376	cmd.exe	vssadmin.exe
PID 4376 wrote to memory of 724	4376	cmd.exe	vssadmin.exe
PID 4376 wrote to memory of 3600	4376	cmd.exe	WMIC.exe
PID 4376 wrote to memory of 3600	4376	cmd.exe	WMIC.exe
PID 4236 wrote to memory of 3136	4236	svchost.exe	cmd.exe
PID 4236 wrote to memory of 3136	4236	svchost.exe	cmd.exe
PID 3136 wrote to memory of 4176	3136	cmd.exe	bcdedit.exe
PID 3136 wrote to memory of 4176	3136	cmd.exe	bcdedit.exe
PID 3136 wrote to memory of 5052	3136	cmd.exe	bcdedit.exe
PID 3136 wrote to memory of 5052	3136	cmd.exe	bcdedit.exe
PID 4236 wrote to memory of 3724	4236	svchost.exe	cmd.exe
PID 4236 wrote to memory of 3724	4236	svchost.exe	cmd.exe
PID 3724 wrote to memory of 1560	3724	cmd.exe	wbadmin.exe
PID 3724 wrote to memory of 1560	3724	cmd.exe	wbadmin.exe
PID 4236 wrote to memory of 4084	4236	svchost.exe	NOTEPAD.EXE
PID 4236 wrote to memory of 4084	4236	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\main.exe
"C:\Users\Admin\AppData\Local\Temp\main.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3888

C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
2⤵
- Checks computer location settings
- 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:4236

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:4376

C:\Windows\system32\vssadmin.exe
vssadmin delete shadows /all /quiet
4⤵
- Interacts with shadow copies
PID:724

C:\Windows\System32\Wbem\WMIC.exe
wmic shadowcopy delete
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3600

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:3136

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} bootstatuspolicy ignoreallfailures
4⤵
- Modifies boot configuration data using bcdedit
PID:4176

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} recoveryenabled no
4⤵
- Modifies boot configuration data using bcdedit
PID:5052

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
3⤵
- Suspicious use of WriteProcessMemory
PID:3724

C:\Windows\system32\wbadmin.exe
wbadmin delete catalog -quiet
4⤵
- Deletes backup catalog
PID:1560

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Message.txt
3⤵
- Opens file in notepad (likely ransom note)
PID:4084

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2784

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:552

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:752

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:1248

Network

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

Modify Registry

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Inhibit System Recovery

4

T1490

Defacement

1

T1491

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
330KB

MD5
3736a823e68e0624d6a97e26404912c9

SHA1
3dc5eac263f2a10eefe1f4d16932623aabdcecc3

SHA256
b7e12bf54356d831e3d7b5e10b0c1782a3e2feb29dd6ed3857c3922d2b48c7c1

SHA512
902955e4c95a5d8840b0ced7cfb4838b59a75f5a87ec694d426c01476c3f64974039d4f6310464777adc78d433a0dd455092db0a8d27381146351be931143cfb

Download Submit
C:\Users\Admin\Documents\Message.txt
Filesize
740B

MD5
b8b46623ec2a4663bfa674b882ebccb6

SHA1
108262bba5d25b970796e50c6c25c652ba8d8b59

SHA256
41764b00cbe89f3a57b8124cf2ce510fcb19ec6c82c40483094da027b3ef660b

SHA512
0b7727e6285dc4b4b625ef072eff93a2a9b283ec0a4e5dcdf1e465522b50fecfc1e0f3da9983ea3cd9c8372463e174526cdad263890dcd551badc2257018fea6

Download Submit
memory/3888-0-0x00000000007E0000-0x0000000000838000-memory.dmp

Filesize
352KB

Download
memory/3888-1-0x00007FF93DDE0000-0x00007FF93E8A1000-memory.dmp

Filesize
10.8MB

Download
memory/3888-14-0x00007FF93DDE0000-0x00007FF93E8A1000-memory.dmp

Filesize
10.8MB

Download
memory/4236-15-0x00007FF93DDE0000-0x00007FF93E8A1000-memory.dmp

Filesize
10.8MB

Download
memory/4236-477-0x00007FF93DDE0000-0x00007FF93E8A1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads