chaos | d77a53638e0cd4c51d9f7c7b971926759aaacfd7b3f041550abaaa1174f72a97

General

Target

0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exe
Size

88KB
MD5

bcf73d0b807d66634d7d25f399fa8ffe
SHA1

3db3790b46e2d430374f6c40e7ce25e633696b75
SHA256

0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e
SHA512

0750fe4212f1bc7a16a426f6c363797e926656f7f27cc2bc5d5f624a436b3a075263ca29fa609696d7ef2d18b79ef7da4998c75a36c9bda2bd2beb456ae08f31
SSDEEP

768:Hqo2MgNp4wBAQr9uNev2SU2Ip4jBqltCF0AxEjenoB69+Fx:Ko2g0AQr9usv2SFHBWAxEjc+

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/928-54-0x0000000000CB0000-0x0000000000CCC000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\AdobeReader.exe	family_chaos
C:\Users\Admin\AppData\Roaming\AdobeReader.exe	family_chaos
behavioral1/memory/1444-60-0x0000000000020000-0x000000000003C000-memory.dmp	family_chaos
behavioral1/memory/1444-95-0x000000001AF70000-0x000000001AFF0000-memory.dmp	family_chaos

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

File Deletion
T1107

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

1980 bcdedit.exe
1552 bcdedit.exe
Deletes backup catalog 3 TTPs 1 IoCs
Uses wbadmin.exe to inhibit system recovery.
ransomware

Command-Line Interface
T1059

File Deletion
T1107

Inhibit System Recovery
T1490

Processes:

wbadmin.exe

pid process

364 wbadmin.exe
Modifies extensions of user files 1 IoCs
Ransomware generally changes the extension on encrypted files.
ransomware

Processes:

AdobeReader.exe

description ioc process

File renamed C:\Users\Admin\Pictures\BlockClose.png => C:\Users\Admin\Pictures\BlockClose.png.Locked AdobeReader.exe

pid	process
1980	bcdedit.exe
1552	bcdedit.exe

pid	process
364	wbadmin.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\BlockClose.png => C:\Users\Admin\Pictures\BlockClose.png.Locked	AdobeReader.exe

Drops startup file 3 IoCs

Processes:

AdobeReader.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\AdobeReader.url	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	AdobeReader.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\readme.txt	AdobeReader.exe

Executes dropped EXE 1 IoCs

Processes:

AdobeReader.exe

pid process

1444 AdobeReader.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
T1081

pid	process
1444	AdobeReader.exe

Drops desktop.ini file(s) 33 IoCs

Processes:

AdobeReader.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Searches\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	AdobeReader.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	AdobeReader.exe

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

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
T1107

Inhibit System Recovery
T1490

Processes:

vssadmin.exe

pid process

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

Processes:

NOTEPAD.EXE

pid process

568 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

AdobeReader.exe

pid process

1444 AdobeReader.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exeAdobeReader.exe

pid process

928 0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exe
1444 AdobeReader.exe
1444 AdobeReader.exe
1444 AdobeReader.exe

pid	process
816	vssadmin.exe

pid	process
568	NOTEPAD.EXE

pid	process
1444	AdobeReader.exe

pid	process
928	0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exe
1444	AdobeReader.exe
1444	AdobeReader.exe
1444	AdobeReader.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exeAdobeReader.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	928	0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exe
Token: SeDebugPrivilege	1444	AdobeReader.exe
Token: SeBackupPrivilege	524	vssvc.exe
Token: SeRestorePrivilege	524	vssvc.exe
Token: SeAuditPrivilege	524	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1876	WMIC.exe
Token: SeSecurityPrivilege	1876	WMIC.exe
Token: SeTakeOwnershipPrivilege	1876	WMIC.exe
Token: SeLoadDriverPrivilege	1876	WMIC.exe
Token: SeSystemProfilePrivilege	1876	WMIC.exe
Token: SeSystemtimePrivilege	1876	WMIC.exe
Token: SeProfSingleProcessPrivilege	1876	WMIC.exe
Token: SeIncBasePriorityPrivilege	1876	WMIC.exe
Token: SeCreatePagefilePrivilege	1876	WMIC.exe
Token: SeBackupPrivilege	1876	WMIC.exe
Token: SeRestorePrivilege	1876	WMIC.exe
Token: SeShutdownPrivilege	1876	WMIC.exe
Token: SeDebugPrivilege	1876	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1876	WMIC.exe
Token: SeRemoteShutdownPrivilege	1876	WMIC.exe
Token: SeUndockPrivilege	1876	WMIC.exe
Token: SeManageVolumePrivilege	1876	WMIC.exe
Token: 33	1876	WMIC.exe
Token: 34	1876	WMIC.exe
Token: 35	1876	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1876	WMIC.exe
Token: SeSecurityPrivilege	1876	WMIC.exe
Token: SeTakeOwnershipPrivilege	1876	WMIC.exe
Token: SeLoadDriverPrivilege	1876	WMIC.exe
Token: SeSystemProfilePrivilege	1876	WMIC.exe
Token: SeSystemtimePrivilege	1876	WMIC.exe
Token: SeProfSingleProcessPrivilege	1876	WMIC.exe
Token: SeIncBasePriorityPrivilege	1876	WMIC.exe
Token: SeCreatePagefilePrivilege	1876	WMIC.exe
Token: SeBackupPrivilege	1876	WMIC.exe
Token: SeRestorePrivilege	1876	WMIC.exe
Token: SeShutdownPrivilege	1876	WMIC.exe
Token: SeDebugPrivilege	1876	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1876	WMIC.exe
Token: SeRemoteShutdownPrivilege	1876	WMIC.exe
Token: SeUndockPrivilege	1876	WMIC.exe
Token: SeManageVolumePrivilege	1876	WMIC.exe
Token: 33	1876	WMIC.exe
Token: 34	1876	WMIC.exe
Token: 35	1876	WMIC.exe
Token: SeBackupPrivilege	272	wbengine.exe
Token: SeRestorePrivilege	272	wbengine.exe
Token: SeSecurityPrivilege	272	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exeAdobeReader.execmd.execmd.execmd.exe

description	pid	process	target process
PID 928 wrote to memory of 1444	928	0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exe	AdobeReader.exe
PID 928 wrote to memory of 1444	928	0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exe	AdobeReader.exe
PID 928 wrote to memory of 1444	928	0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exe	AdobeReader.exe
PID 1444 wrote to memory of 1040	1444	AdobeReader.exe	cmd.exe
PID 1444 wrote to memory of 1040	1444	AdobeReader.exe	cmd.exe
PID 1444 wrote to memory of 1040	1444	AdobeReader.exe	cmd.exe
PID 1040 wrote to memory of 816	1040	cmd.exe	vssadmin.exe
PID 1040 wrote to memory of 816	1040	cmd.exe	vssadmin.exe
PID 1040 wrote to memory of 816	1040	cmd.exe	vssadmin.exe
PID 1040 wrote to memory of 1876	1040	cmd.exe	WMIC.exe
PID 1040 wrote to memory of 1876	1040	cmd.exe	WMIC.exe
PID 1040 wrote to memory of 1876	1040	cmd.exe	WMIC.exe
PID 1444 wrote to memory of 1784	1444	AdobeReader.exe	cmd.exe
PID 1444 wrote to memory of 1784	1444	AdobeReader.exe	cmd.exe
PID 1444 wrote to memory of 1784	1444	AdobeReader.exe	cmd.exe
PID 1784 wrote to memory of 1980	1784	cmd.exe	bcdedit.exe
PID 1784 wrote to memory of 1980	1784	cmd.exe	bcdedit.exe
PID 1784 wrote to memory of 1980	1784	cmd.exe	bcdedit.exe
PID 1784 wrote to memory of 1552	1784	cmd.exe	bcdedit.exe
PID 1784 wrote to memory of 1552	1784	cmd.exe	bcdedit.exe
PID 1784 wrote to memory of 1552	1784	cmd.exe	bcdedit.exe
PID 1444 wrote to memory of 1560	1444	AdobeReader.exe	cmd.exe
PID 1444 wrote to memory of 1560	1444	AdobeReader.exe	cmd.exe
PID 1444 wrote to memory of 1560	1444	AdobeReader.exe	cmd.exe
PID 1560 wrote to memory of 364	1560	cmd.exe	wbadmin.exe
PID 1560 wrote to memory of 364	1560	cmd.exe	wbadmin.exe
PID 1560 wrote to memory of 364	1560	cmd.exe	wbadmin.exe
PID 1444 wrote to memory of 568	1444	AdobeReader.exe	NOTEPAD.EXE
PID 1444 wrote to memory of 568	1444	AdobeReader.exe	NOTEPAD.EXE
PID 1444 wrote to memory of 568	1444	AdobeReader.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\0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exe
"C:\Users\Admin\AppData\Local\Temp\0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:928

C:\Users\Admin\AppData\Roaming\AdobeReader.exe
"C:\Users\Admin\AppData\Roaming\AdobeReader.exe"
2⤵
- Modifies extensions of user files
- 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:1444

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:1040

C:\Windows\system32\vssadmin.exe
vssadmin delete shadows /all /quiet
4⤵
- Interacts with shadow copies
PID:816

C:\Windows\System32\Wbem\WMIC.exe
wmic shadowcopy delete
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1876

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:1784

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} bootstatuspolicy ignoreallfailures
4⤵
- Modifies boot configuration data using bcdedit
PID:1980

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} recoveryenabled no
4⤵
- Modifies boot configuration data using bcdedit
PID:1552

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
3⤵
- Suspicious use of WriteProcessMemory
PID:1560

C:\Windows\system32\wbadmin.exe
wbadmin delete catalog -quiet
4⤵
- Deletes backup catalog
PID:364

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\readme.txt
3⤵
- Opens file in notepad (likely ransom note)
PID:568

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:524

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:272

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1004

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1620

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Command-Line Interface

1

T1059

Persistence

Privilege Escalation

Defense Evasion

File Deletion

3

T1107

Credential Access

Credentials in Files

1

T1081

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

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Downloads

C:\Users\Admin\AppData\Roaming\AdobeReader.exe
Filesize
88KB

MD5
bcf73d0b807d66634d7d25f399fa8ffe

SHA1
3db3790b46e2d430374f6c40e7ce25e633696b75

SHA256
0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e

SHA512
0750fe4212f1bc7a16a426f6c363797e926656f7f27cc2bc5d5f624a436b3a075263ca29fa609696d7ef2d18b79ef7da4998c75a36c9bda2bd2beb456ae08f31

Download Submit
C:\Users\Admin\AppData\Roaming\AdobeReader.exe
Filesize
88KB

MD5
bcf73d0b807d66634d7d25f399fa8ffe

SHA1
3db3790b46e2d430374f6c40e7ce25e633696b75

SHA256
0bb2957b2b8ed0a1c458da6edeaf5a48b2c1ecdd7d7ed33d00749ef1f5653b1e

SHA512
0750fe4212f1bc7a16a426f6c363797e926656f7f27cc2bc5d5f624a436b3a075263ca29fa609696d7ef2d18b79ef7da4998c75a36c9bda2bd2beb456ae08f31

Download Submit
C:\Users\Admin\AppData\Roaming\readme.txt
Filesize
379B

MD5
2229cf5789dde916f76e2fcc1feb0a79

SHA1
43414adea3f0b537aae4ac0f884678b8a7fe21fb

SHA256
eccddbff564c04173b6704b3c3cdc3cd2cb166acbd97e8d18dd39286d9460760

SHA512
48ae3dfe5f5061c109ac281f21f5c4526e212421b5df516937eabc7780ffef2c8f6aa58a93af8a069603a37d20e0c1852f2c9776ed2d34701720455546befde1

Download Submit
C:\Users\Admin\Downloads\readme.txt
Filesize
379B

MD5
2229cf5789dde916f76e2fcc1feb0a79

SHA1
43414adea3f0b537aae4ac0f884678b8a7fe21fb

SHA256
eccddbff564c04173b6704b3c3cdc3cd2cb166acbd97e8d18dd39286d9460760

SHA512
48ae3dfe5f5061c109ac281f21f5c4526e212421b5df516937eabc7780ffef2c8f6aa58a93af8a069603a37d20e0c1852f2c9776ed2d34701720455546befde1

Download Submit
memory/928-54-0x0000000000CB0000-0x0000000000CCC000-memory.dmp

Filesize
112KB

Download
memory/1444-60-0x0000000000020000-0x000000000003C000-memory.dmp

Filesize
112KB

Download
memory/1444-95-0x000000001AF70000-0x000000001AFF0000-memory.dmp

Filesize
512KB

Download
memory/1444-529-0x000000001AF70000-0x000000001AFF0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads