chaos | 8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe

Analysis

max time kernel
20s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02-10-2024 19:31

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General

Target

8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
Size

21KB
MD5

14d1c2327c5bdde7656b7535f7936d92
SHA1

20c05343aff8bc0661aa928c26bee1146ee7f454
SHA256

8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe
SHA512

195a525d09c977fa05acf5ac6eb7fc5690e83879555137c20838facf74bf7248ef15af2a2298e7bb02dc98e6bc61b37a6f11d8f7a0d4d7182447ac400d8618d9
SSDEEP

384:U3Mg/bqo2b52NspBRdwdQJer91Cyu6eF:qqo2AspOdYer9x3eF

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

resource	yara_rule
behavioral1/memory/2136-1-0x0000000001130000-0x000000000113C000-memory.dmp	family_chaos
behavioral1/files/0x000700000001211a-5.dat	family_chaos
behavioral1/memory/2748-7-0x0000000000D90000-0x0000000000D9C000-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

pid	Process
2436	bcdedit.exe
2248	bcdedit.exe

Renames multiple (201) 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

pid	Process
2016	wbadmin.exe

Drops startup file 3 IoCs

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

pid	Process
2748	svchost.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 34 IoCs

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\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\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\Links for United States\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\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\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\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\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Sample Videos\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\Maintenance\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\Windows\Recent\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1846800975-3917212583-2893086201-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\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\Libraries\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

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

pid	Process
1988	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1544	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2748	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2136	8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
2136	8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
2136	8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
2748	svchost.exe
2748	svchost.exe
2748	svchost.exe
2748	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2136	8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
Token: SeDebugPrivilege	2748	svchost.exe
Token: SeBackupPrivilege	1312	vssvc.exe
Token: SeRestorePrivilege	1312	vssvc.exe
Token: SeAuditPrivilege	1312	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1440	WMIC.exe
Token: SeSecurityPrivilege	1440	WMIC.exe
Token: SeTakeOwnershipPrivilege	1440	WMIC.exe
Token: SeLoadDriverPrivilege	1440	WMIC.exe
Token: SeSystemProfilePrivilege	1440	WMIC.exe
Token: SeSystemtimePrivilege	1440	WMIC.exe
Token: SeProfSingleProcessPrivilege	1440	WMIC.exe
Token: SeIncBasePriorityPrivilege	1440	WMIC.exe
Token: SeCreatePagefilePrivilege	1440	WMIC.exe
Token: SeBackupPrivilege	1440	WMIC.exe
Token: SeRestorePrivilege	1440	WMIC.exe
Token: SeShutdownPrivilege	1440	WMIC.exe
Token: SeDebugPrivilege	1440	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1440	WMIC.exe
Token: SeRemoteShutdownPrivilege	1440	WMIC.exe
Token: SeUndockPrivilege	1440	WMIC.exe
Token: SeManageVolumePrivilege	1440	WMIC.exe
Token: 33	1440	WMIC.exe
Token: 34	1440	WMIC.exe
Token: 35	1440	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1440	WMIC.exe
Token: SeSecurityPrivilege	1440	WMIC.exe
Token: SeTakeOwnershipPrivilege	1440	WMIC.exe
Token: SeLoadDriverPrivilege	1440	WMIC.exe
Token: SeSystemProfilePrivilege	1440	WMIC.exe
Token: SeSystemtimePrivilege	1440	WMIC.exe
Token: SeProfSingleProcessPrivilege	1440	WMIC.exe
Token: SeIncBasePriorityPrivilege	1440	WMIC.exe
Token: SeCreatePagefilePrivilege	1440	WMIC.exe
Token: SeBackupPrivilege	1440	WMIC.exe
Token: SeRestorePrivilege	1440	WMIC.exe
Token: SeShutdownPrivilege	1440	WMIC.exe
Token: SeDebugPrivilege	1440	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1440	WMIC.exe
Token: SeRemoteShutdownPrivilege	1440	WMIC.exe
Token: SeUndockPrivilege	1440	WMIC.exe
Token: SeManageVolumePrivilege	1440	WMIC.exe
Token: 33	1440	WMIC.exe
Token: 34	1440	WMIC.exe
Token: 35	1440	WMIC.exe
Token: SeBackupPrivilege	904	wbengine.exe
Token: SeRestorePrivilege	904	wbengine.exe
Token: SeSecurityPrivilege	904	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 2748	2136	8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe	30
PID 2136 wrote to memory of 2748	2136	8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe	30
PID 2136 wrote to memory of 2748	2136	8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe	30
PID 2748 wrote to memory of 2504	2748	svchost.exe	32
PID 2748 wrote to memory of 2504	2748	svchost.exe	32
PID 2748 wrote to memory of 2504	2748	svchost.exe	32
PID 2504 wrote to memory of 1988	2504	cmd.exe	34
PID 2504 wrote to memory of 1988	2504	cmd.exe	34
PID 2504 wrote to memory of 1988	2504	cmd.exe	34
PID 2504 wrote to memory of 1440	2504	cmd.exe	37
PID 2504 wrote to memory of 1440	2504	cmd.exe	37
PID 2504 wrote to memory of 1440	2504	cmd.exe	37
PID 2748 wrote to memory of 2460	2748	svchost.exe	39
PID 2748 wrote to memory of 2460	2748	svchost.exe	39
PID 2748 wrote to memory of 2460	2748	svchost.exe	39
PID 2460 wrote to memory of 2436	2460	cmd.exe	41
PID 2460 wrote to memory of 2436	2460	cmd.exe	41
PID 2460 wrote to memory of 2436	2460	cmd.exe	41
PID 2460 wrote to memory of 2248	2460	cmd.exe	42
PID 2460 wrote to memory of 2248	2460	cmd.exe	42
PID 2460 wrote to memory of 2248	2460	cmd.exe	42
PID 2748 wrote to memory of 3008	2748	svchost.exe	43
PID 2748 wrote to memory of 3008	2748	svchost.exe	43
PID 2748 wrote to memory of 3008	2748	svchost.exe	43
PID 3008 wrote to memory of 2016	3008	cmd.exe	45
PID 3008 wrote to memory of 2016	3008	cmd.exe	45
PID 3008 wrote to memory of 2016	3008	cmd.exe	45
PID 2748 wrote to memory of 1544	2748	svchost.exe	49
PID 2748 wrote to memory of 1544	2748	svchost.exe	49
PID 2748 wrote to memory of 1544	2748	svchost.exe	49

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\8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe
"C:\Users\Admin\AppData\Local\Temp\8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2136
- 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:2748
- - 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:2504
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1988
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1440
- - 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:2460
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2436
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2248
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3008
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2016
- - 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:1544

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1312

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:904

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2476

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1076

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

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
21KB

MD5
14d1c2327c5bdde7656b7535f7936d92

SHA1
20c05343aff8bc0661aa928c26bee1146ee7f454

SHA256
8255e2d4929a77203721d93e3945e5cbf1fcaf3c2fe052b7cd18a5e0846e0dfe

SHA512
195a525d09c977fa05acf5ac6eb7fc5690e83879555137c20838facf74bf7248ef15af2a2298e7bb02dc98e6bc61b37a6f11d8f7a0d4d7182447ac400d8618d9

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

Filesize
15B

MD5
f80d41ba30a3302ce7695fb00847b7b1

SHA1
d49f02c98e7577e5c405437350c2b0e66ae11a54

SHA256
1132f98b986f4ce354f5f68e7d67f1d780e4d1ff414ec08d2896b06b1fee7d36

SHA512
53bd9dd8a457459d6936599260ddd0f88914b4e681324dad34cd8bc63e532d936e397e286bdf3f3f4b02dc7556cbacf559ecd5d739d29c9c1380321203fef8ae

Download Submit
memory/2136-0-0x000007FEF5A83000-0x000007FEF5A84000-memory.dmp

Filesize
4KB

Download
memory/2136-1-0x0000000001130000-0x000000000113C000-memory.dmp

Filesize
48KB

Download
memory/2748-7-0x0000000000D90000-0x0000000000D9C000-memory.dmp

Filesize
48KB

Download
memory/2748-9-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

Filesize
9.9MB

Download
memory/2748-18-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

Filesize
9.9MB

Download
memory/2748-465-0x000007FEF5A80000-0x000007FEF646C000-memory.dmp

Filesize
9.9MB

Download