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
839s
max time network
843s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
13-07-2024 09:52

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General

Target

f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe
Size

205KB
MD5

2430019335d88321467e82ab8f51546b
SHA1

7d233a893492e0efd4d7e919941325b5d44abeb7
SHA256

f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0
SHA512

6ee56eabe77caf05bde12e9e8fbe97703cccee33cfbe09c38e0a0a397a3f93221751bbcd2ad2261f6a11839ef2741689478578ed3cd9ae2d781c3fffee3c2e7b
SSDEEP

6144:+B4Ir9NzqHW7V5V9w/UIRZizI1aqebq/lsyp:+B4uqHW7nU/pZmiXqy

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
behavioral31/memory/1984-1-0x0000000000F10000-0x0000000000F48000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	family_chaos
behavioral31/memory/2520-7-0x0000000001320000-0x0000000001358000-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

2140 bcdedit.exe
3040 bcdedit.exe
Renames multiple (218) 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

3048 wbadmin.exe

pid	process
2140	bcdedit.exe
3040	bcdedit.exe

pid	process
3048	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

2520 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
2520	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Videos\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\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\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\Admin\Saved Games\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\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\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\SendTo\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\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-940600906-3464502421-4240639183-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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	C:\Users\Admin\Downloads\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\Internet Explorer\Quick Launch\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\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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\Public\Pictures\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 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

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

Processes:

NOTEPAD.EXE

pid process

2268 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

2520 svchost.exe

pid	process
824	vssadmin.exe

pid	process
2268	NOTEPAD.EXE

pid	process
2520	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exesvchost.exe

pid	process
1984	f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe
1984	f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe
1984	f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe
2520	svchost.exe
2520	svchost.exe
2520	svchost.exe
2520	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	1984	f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe
Token: SeDebugPrivilege	2520	svchost.exe
Token: SeBackupPrivilege	1892	vssvc.exe
Token: SeRestorePrivilege	1892	vssvc.exe
Token: SeAuditPrivilege	1892	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2132	WMIC.exe
Token: SeSecurityPrivilege	2132	WMIC.exe
Token: SeTakeOwnershipPrivilege	2132	WMIC.exe
Token: SeLoadDriverPrivilege	2132	WMIC.exe
Token: SeSystemProfilePrivilege	2132	WMIC.exe
Token: SeSystemtimePrivilege	2132	WMIC.exe
Token: SeProfSingleProcessPrivilege	2132	WMIC.exe
Token: SeIncBasePriorityPrivilege	2132	WMIC.exe
Token: SeCreatePagefilePrivilege	2132	WMIC.exe
Token: SeBackupPrivilege	2132	WMIC.exe
Token: SeRestorePrivilege	2132	WMIC.exe
Token: SeShutdownPrivilege	2132	WMIC.exe
Token: SeDebugPrivilege	2132	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2132	WMIC.exe
Token: SeRemoteShutdownPrivilege	2132	WMIC.exe
Token: SeUndockPrivilege	2132	WMIC.exe
Token: SeManageVolumePrivilege	2132	WMIC.exe
Token: 33	2132	WMIC.exe
Token: 34	2132	WMIC.exe
Token: 35	2132	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2132	WMIC.exe
Token: SeSecurityPrivilege	2132	WMIC.exe
Token: SeTakeOwnershipPrivilege	2132	WMIC.exe
Token: SeLoadDriverPrivilege	2132	WMIC.exe
Token: SeSystemProfilePrivilege	2132	WMIC.exe
Token: SeSystemtimePrivilege	2132	WMIC.exe
Token: SeProfSingleProcessPrivilege	2132	WMIC.exe
Token: SeIncBasePriorityPrivilege	2132	WMIC.exe
Token: SeCreatePagefilePrivilege	2132	WMIC.exe
Token: SeBackupPrivilege	2132	WMIC.exe
Token: SeRestorePrivilege	2132	WMIC.exe
Token: SeShutdownPrivilege	2132	WMIC.exe
Token: SeDebugPrivilege	2132	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2132	WMIC.exe
Token: SeRemoteShutdownPrivilege	2132	WMIC.exe
Token: SeUndockPrivilege	2132	WMIC.exe
Token: SeManageVolumePrivilege	2132	WMIC.exe
Token: 33	2132	WMIC.exe
Token: 34	2132	WMIC.exe
Token: 35	2132	WMIC.exe
Token: SeBackupPrivilege	920	wbengine.exe
Token: SeRestorePrivilege	920	wbengine.exe
Token: SeSecurityPrivilege	920	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exesvchost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1984 wrote to memory of 2520	1984	f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe	svchost.exe
PID 1984 wrote to memory of 2520	1984	f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe	svchost.exe
PID 1984 wrote to memory of 2520	1984	f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe	svchost.exe
PID 2520 wrote to memory of 2824	2520	svchost.exe	cmd.exe
PID 2520 wrote to memory of 2824	2520	svchost.exe	cmd.exe
PID 2520 wrote to memory of 2824	2520	svchost.exe	cmd.exe
PID 2824 wrote to memory of 824	2824	cmd.exe	vssadmin.exe
PID 2824 wrote to memory of 824	2824	cmd.exe	vssadmin.exe
PID 2824 wrote to memory of 824	2824	cmd.exe	vssadmin.exe
PID 2824 wrote to memory of 2132	2824	cmd.exe	WMIC.exe
PID 2824 wrote to memory of 2132	2824	cmd.exe	WMIC.exe
PID 2824 wrote to memory of 2132	2824	cmd.exe	WMIC.exe
PID 2520 wrote to memory of 1416	2520	svchost.exe	cmd.exe
PID 2520 wrote to memory of 1416	2520	svchost.exe	cmd.exe
PID 2520 wrote to memory of 1416	2520	svchost.exe	cmd.exe
PID 1416 wrote to memory of 2140	1416	cmd.exe	bcdedit.exe
PID 1416 wrote to memory of 2140	1416	cmd.exe	bcdedit.exe
PID 1416 wrote to memory of 2140	1416	cmd.exe	bcdedit.exe
PID 1416 wrote to memory of 3040	1416	cmd.exe	bcdedit.exe
PID 1416 wrote to memory of 3040	1416	cmd.exe	bcdedit.exe
PID 1416 wrote to memory of 3040	1416	cmd.exe	bcdedit.exe
PID 2520 wrote to memory of 2996	2520	svchost.exe	cmd.exe
PID 2520 wrote to memory of 2996	2520	svchost.exe	cmd.exe
PID 2520 wrote to memory of 2996	2520	svchost.exe	cmd.exe
PID 2996 wrote to memory of 3048	2996	cmd.exe	wbadmin.exe
PID 2996 wrote to memory of 3048	2996	cmd.exe	wbadmin.exe
PID 2996 wrote to memory of 3048	2996	cmd.exe	wbadmin.exe
PID 2520 wrote to memory of 2268	2520	svchost.exe	NOTEPAD.EXE
PID 2520 wrote to memory of 2268	2520	svchost.exe	NOTEPAD.EXE
PID 2520 wrote to memory of 2268	2520	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\f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe
"C:\Users\Admin\AppData\Local\Temp\f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1984

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:2520

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:2824

C:\Windows\system32\vssadmin.exe
vssadmin delete shadows /all /quiet
4⤵
- Interacts with shadow copies
PID:824

C:\Windows\System32\Wbem\WMIC.exe
wmic shadowcopy delete
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2132

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:1416

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} bootstatuspolicy ignoreallfailures
4⤵
- Modifies boot configuration data using bcdedit
PID:2140

C:\Windows\system32\bcdedit.exe
bcdedit /set {default} recoveryenabled no
4⤵
- Modifies boot configuration data using bcdedit
PID:3040

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
3⤵
- Suspicious use of WriteProcessMemory
PID:2996

C:\Windows\system32\wbadmin.exe
wbadmin delete catalog -quiet
4⤵
- Deletes backup catalog
PID:3048

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:2268

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1892

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:920

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1252

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1432

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

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

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\svchost.exe

Filesize
205KB

MD5
2430019335d88321467e82ab8f51546b

SHA1
7d233a893492e0efd4d7e919941325b5d44abeb7

SHA256
f062577b6879fb42fbf7fef1c2a21f96d4d372f1424c1c77f255d13fb60bfae0

SHA512
6ee56eabe77caf05bde12e9e8fbe97703cccee33cfbe09c38e0a0a397a3f93221751bbcd2ad2261f6a11839ef2741689478578ed3cd9ae2d781c3fffee3c2e7b

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

Filesize
844B

MD5
a23e76ce33adf72409fb0c43393d3087

SHA1
502620245be1d0912ab9c4fb5390ab14e27778a8

SHA256
88702c38b8bea9555a13ae747cbfdf2947fff6060f4fef75486025e0152ddf3a

SHA512
24fdd6761b29eb62ecfefa7a5ed15705645c3a303ada3728823382ba38e08eae12f15840fb65361391cff1ba4cad55fdfb6e0144c9e95b7e7fbe928319d732bb

Download Submit
memory/1984-0-0x000007FEF6113000-0x000007FEF6114000-memory.dmp

Filesize
4KB

Download
memory/1984-1-0x0000000000F10000-0x0000000000F48000-memory.dmp

Filesize
224KB

Download
memory/2520-8-0x000007FEF5723000-0x000007FEF5724000-memory.dmp

Filesize
4KB

Download
memory/2520-7-0x0000000001320000-0x0000000001358000-memory.dmp

Filesize
224KB

Download
memory/2520-30-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

Filesize
9.9MB

Download
memory/2520-500-0x000007FEF5723000-0x000007FEF5724000-memory.dmp

Filesize
4KB

Download
memory/2520-501-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

Filesize
9.9MB

Download