chaos | b1968b4be3f82fc26b1e2decdcb8f532915aed847603aeeaf254722bdd411d26

Resubmissions

16-03-2024 17:17

240316-vtswysfd2y 10

16-03-2024 15:31

240316-syg9xafg39 10

15-03-2024 08:15

240315-j5rmgsbg5z 10

Analysis

max time kernel
1566s
max time network
1567s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
16-03-2024 15:31

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General

Target

2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exe
Size

31KB
MD5

3fdd9b2402350844b482aa6076e18d22
SHA1

81034b4deb144ecdf21cb213e455a84ea319812c
SHA256

2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51
SHA512

cedd5b9899cac6cce702c011ea7b9168ede0fe3e83a9ccd20f4e42f726c9b0a78ada6bf8b6863aeafc14d62500af8e347c4627b69233f96a2ae4df02c21549a4
SSDEEP

384:y3Mg/bqo284ujNI2pl6VwTwJrjr91CzJ8lC12ntnGeC:Iqo27uj+2pIw4rjr9kJ8lCEtGeC

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

Processes:

resource	yara_rule
behavioral8/memory/2792-0-0x0000000000AC0000-0x0000000000ACE000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	family_chaos
behavioral8/memory/1272-7-0x0000000001280000-0x000000000128E000-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
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
ransomware evasion

Inhibit System Recovery
T1490

Processes:

bcdedit.exebcdedit.exe

pid process

2232 bcdedit.exe
1900 bcdedit.exe
Renames multiple (189) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware
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

2220 wbadmin.exe

pid	process
2232	bcdedit.exe
1900	bcdedit.exe

pid	process
2220	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

1272 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
1272	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
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\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\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\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\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\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\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\Desktop\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\Windows\Libraries\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-1-5-21-3452737119-3959686427-228443150-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\q5igtjzq2.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

2620 vssadmin.exe
Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

2240 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

1272 svchost.exe

pid	process
2620	vssadmin.exe

pid	process
2240	NOTEPAD.EXE

pid	process
1272	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exesvchost.exe

pid	process
2792	2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exe
2792	2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exe
1272	svchost.exe
1272	svchost.exe
1272	svchost.exe
1272	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	2792	2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exe
Token: SeDebugPrivilege	1272	svchost.exe
Token: SeBackupPrivilege	2120	vssvc.exe
Token: SeRestorePrivilege	2120	vssvc.exe
Token: SeAuditPrivilege	2120	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2332	WMIC.exe
Token: SeSecurityPrivilege	2332	WMIC.exe
Token: SeTakeOwnershipPrivilege	2332	WMIC.exe
Token: SeLoadDriverPrivilege	2332	WMIC.exe
Token: SeSystemProfilePrivilege	2332	WMIC.exe
Token: SeSystemtimePrivilege	2332	WMIC.exe
Token: SeProfSingleProcessPrivilege	2332	WMIC.exe
Token: SeIncBasePriorityPrivilege	2332	WMIC.exe
Token: SeCreatePagefilePrivilege	2332	WMIC.exe
Token: SeBackupPrivilege	2332	WMIC.exe
Token: SeRestorePrivilege	2332	WMIC.exe
Token: SeShutdownPrivilege	2332	WMIC.exe
Token: SeDebugPrivilege	2332	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2332	WMIC.exe
Token: SeRemoteShutdownPrivilege	2332	WMIC.exe
Token: SeUndockPrivilege	2332	WMIC.exe
Token: SeManageVolumePrivilege	2332	WMIC.exe
Token: 33	2332	WMIC.exe
Token: 34	2332	WMIC.exe
Token: 35	2332	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2332	WMIC.exe
Token: SeSecurityPrivilege	2332	WMIC.exe
Token: SeTakeOwnershipPrivilege	2332	WMIC.exe
Token: SeLoadDriverPrivilege	2332	WMIC.exe
Token: SeSystemProfilePrivilege	2332	WMIC.exe
Token: SeSystemtimePrivilege	2332	WMIC.exe
Token: SeProfSingleProcessPrivilege	2332	WMIC.exe
Token: SeIncBasePriorityPrivilege	2332	WMIC.exe
Token: SeCreatePagefilePrivilege	2332	WMIC.exe
Token: SeBackupPrivilege	2332	WMIC.exe
Token: SeRestorePrivilege	2332	WMIC.exe
Token: SeShutdownPrivilege	2332	WMIC.exe
Token: SeDebugPrivilege	2332	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2332	WMIC.exe
Token: SeRemoteShutdownPrivilege	2332	WMIC.exe
Token: SeUndockPrivilege	2332	WMIC.exe
Token: SeManageVolumePrivilege	2332	WMIC.exe
Token: 33	2332	WMIC.exe
Token: 34	2332	WMIC.exe
Token: 35	2332	WMIC.exe
Token: SeBackupPrivilege	320	wbengine.exe
Token: SeRestorePrivilege	320	wbengine.exe
Token: SeSecurityPrivilege	320	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exesvchost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 2792 wrote to memory of 1272	2792	2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exe	svchost.exe
PID 2792 wrote to memory of 1272	2792	2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exe	svchost.exe
PID 2792 wrote to memory of 1272	2792	2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exe	svchost.exe
PID 1272 wrote to memory of 2488	1272	svchost.exe	cmd.exe
PID 1272 wrote to memory of 2488	1272	svchost.exe	cmd.exe
PID 1272 wrote to memory of 2488	1272	svchost.exe	cmd.exe
PID 2488 wrote to memory of 2620	2488	cmd.exe	vssadmin.exe
PID 2488 wrote to memory of 2620	2488	cmd.exe	vssadmin.exe
PID 2488 wrote to memory of 2620	2488	cmd.exe	vssadmin.exe
PID 2488 wrote to memory of 2332	2488	cmd.exe	WMIC.exe
PID 2488 wrote to memory of 2332	2488	cmd.exe	WMIC.exe
PID 2488 wrote to memory of 2332	2488	cmd.exe	WMIC.exe
PID 1272 wrote to memory of 1668	1272	svchost.exe	cmd.exe
PID 1272 wrote to memory of 1668	1272	svchost.exe	cmd.exe
PID 1272 wrote to memory of 1668	1272	svchost.exe	cmd.exe
PID 1668 wrote to memory of 2232	1668	cmd.exe	bcdedit.exe
PID 1668 wrote to memory of 2232	1668	cmd.exe	bcdedit.exe
PID 1668 wrote to memory of 2232	1668	cmd.exe	bcdedit.exe
PID 1668 wrote to memory of 1900	1668	cmd.exe	bcdedit.exe
PID 1668 wrote to memory of 1900	1668	cmd.exe	bcdedit.exe
PID 1668 wrote to memory of 1900	1668	cmd.exe	bcdedit.exe
PID 1272 wrote to memory of 2324	1272	svchost.exe	cmd.exe
PID 1272 wrote to memory of 2324	1272	svchost.exe	cmd.exe
PID 1272 wrote to memory of 2324	1272	svchost.exe	cmd.exe
PID 2324 wrote to memory of 2220	2324	cmd.exe	wbadmin.exe
PID 2324 wrote to memory of 2220	2324	cmd.exe	wbadmin.exe
PID 2324 wrote to memory of 2220	2324	cmd.exe	wbadmin.exe
PID 1272 wrote to memory of 2240	1272	svchost.exe	NOTEPAD.EXE
PID 1272 wrote to memory of 2240	1272	svchost.exe	NOTEPAD.EXE
PID 1272 wrote to memory of 2240	1272	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\2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exe
"C:\Users\Admin\AppData\Local\Temp\2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2792

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:1272

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:2488

C:\Windows\system32\vssadmin.exe
vssadmin delete shadows /all /quiet
4⤵
- Interacts with shadow copies
PID:2620

C:\Windows\System32\Wbem\WMIC.exe
wmic shadowcopy delete
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2332

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:1668

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} bootstatuspolicy ignoreallfailures
4⤵
- Modifies boot configuration data using bcdedit
PID:2232

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} recoveryenabled no
4⤵
- Modifies boot configuration data using bcdedit
PID:1900

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
3⤵
- Suspicious use of WriteProcessMemory
PID:2324

C:\Windows\system32\wbadmin.exe
wbadmin delete catalog -quiet
4⤵
- Deletes backup catalog
PID:2220

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:2240

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2120

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:320

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1624

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2264

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Query Registry

T1012

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Inhibit System Recovery

T1490

Defacement

T1491

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe
Filesize
31KB

MD5
3fdd9b2402350844b482aa6076e18d22

SHA1
81034b4deb144ecdf21cb213e455a84ea319812c

SHA256
2e8af1ad4bb1e9f1bfdd3a04bf28363bbcdb3653e6aa4864f61b09c050378d51

SHA512
cedd5b9899cac6cce702c011ea7b9168ede0fe3e83a9ccd20f4e42f726c9b0a78ada6bf8b6863aeafc14d62500af8e347c4627b69233f96a2ae4df02c21549a4

Download Submit
C:\Users\Admin\Documents\read_it.txt
Filesize
76B

MD5
fdc5e26dd3c5a9eb5560d1d5e836a612

SHA1
d2292b9165636c5cca4ac33a09ba9c23eaa814d5

SHA256
5a90da73670cbedf2f45bf010aafb018ce6e8b8f8c7ea6e7b2d4cd9cb0ea0326

SHA512
3c6d61a7a9554b0de91adaf8773df48fe236d29fb7bbde358fdb4639bd64a576341684dbba447a1e101ea89a717739d8ebceacc24f26c59dda37b67bbfd5e1a2

Download Submit
memory/1272-7-0x0000000001280000-0x000000000128E000-memory.dmp

Filesize
56KB

Download
memory/1272-8-0x000007FEF5A30000-0x000007FEF641C000-memory.dmp

Filesize
9.9MB

Download
memory/1272-10-0x0000000000450000-0x00000000004D0000-memory.dmp

Filesize
512KB

Download
memory/1272-443-0x000007FEF5A30000-0x000007FEF641C000-memory.dmp

Filesize
9.9MB

Download
memory/1272-444-0x0000000000450000-0x00000000004D0000-memory.dmp

Filesize
512KB

Download
memory/2792-0-0x0000000000AC0000-0x0000000000ACE000-memory.dmp

Filesize
56KB

Download
memory/2792-1-0x000007FEF5A30000-0x000007FEF641C000-memory.dmp

Filesize
9.9MB

Download
memory/2792-442-0x000007FEF5A30000-0x000007FEF641C000-memory.dmp

Filesize
9.9MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads