chaos | be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150

Analysis

max time kernel
118s
max time network
124s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-11-2024 03:46

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General

Target

be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe
Size

142KB
MD5

af70883f7ff9f9c19286ed07972bab84
SHA1

5d59cc33696cdc78f59448f2f6fb6cb08622b976
SHA256

be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150
SHA512

bfea6fa338ad9bb2be18a7fe1398d82f01258be0f57a3f2129a2b3e08342771faca874dcf0f257b54b14c49003789f139fe8fe9e5ca6b53d352670f6549438d1
SSDEEP

3072:o3kGRr9i0TVKIe6m8sdpcL0uhq70NEqj5Swo29V56K+Olhly3UdcHkl:+r9i0sIF5gdQubv29V56K+ihly3MN

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
behavioral1/memory/2144-1-0x0000000000A10000-0x0000000000A3A000-memory.dmp	family_chaos
behavioral1/files/0x000c000000012268-5.dat	family_chaos
behavioral1/memory/2948-7-0x0000000000A20000-0x0000000000A4A000-memory.dmp	family_chaos

Chaos 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
1628	bcdedit.exe
1712	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
320	wbadmin.exe

Drops startup file 3 IoCs

Processes:

svchoster.exe

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

Executes dropped EXE 1 IoCs

Processes:

svchoster.exe

pid	Process
2948	svchoster.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

Processes:

svchoster.exe

description	ioc	Process
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchoster.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1846800975-3917212583-2893086201-1000\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	svchoster.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchoster.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchoster.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

svchoster.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\2snn3dbso.jpg"	svchoster.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
400	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

Processes:

NOTEPAD.EXE

pid	Process
1164	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchoster.exe

pid	Process
2948	svchoster.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exesvchoster.exe

pid	Process
2144	be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe
2144	be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe
2144	be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe
2948	svchoster.exe
2948	svchoster.exe
2948	svchoster.exe
2948	svchoster.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exesvchoster.exevssvc.exeWMIC.exewbengine.exe

description	pid	Process
Token: SeDebugPrivilege	2144	be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe
Token: SeDebugPrivilege	2948	svchoster.exe
Token: SeBackupPrivilege	2960	vssvc.exe
Token: SeRestorePrivilege	2960	vssvc.exe
Token: SeAuditPrivilege	2960	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1076	WMIC.exe
Token: SeSecurityPrivilege	1076	WMIC.exe
Token: SeTakeOwnershipPrivilege	1076	WMIC.exe
Token: SeLoadDriverPrivilege	1076	WMIC.exe
Token: SeSystemProfilePrivilege	1076	WMIC.exe
Token: SeSystemtimePrivilege	1076	WMIC.exe
Token: SeProfSingleProcessPrivilege	1076	WMIC.exe
Token: SeIncBasePriorityPrivilege	1076	WMIC.exe
Token: SeCreatePagefilePrivilege	1076	WMIC.exe
Token: SeBackupPrivilege	1076	WMIC.exe
Token: SeRestorePrivilege	1076	WMIC.exe
Token: SeShutdownPrivilege	1076	WMIC.exe
Token: SeDebugPrivilege	1076	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1076	WMIC.exe
Token: SeRemoteShutdownPrivilege	1076	WMIC.exe
Token: SeUndockPrivilege	1076	WMIC.exe
Token: SeManageVolumePrivilege	1076	WMIC.exe
Token: 33	1076	WMIC.exe
Token: 34	1076	WMIC.exe
Token: 35	1076	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1076	WMIC.exe
Token: SeSecurityPrivilege	1076	WMIC.exe
Token: SeTakeOwnershipPrivilege	1076	WMIC.exe
Token: SeLoadDriverPrivilege	1076	WMIC.exe
Token: SeSystemProfilePrivilege	1076	WMIC.exe
Token: SeSystemtimePrivilege	1076	WMIC.exe
Token: SeProfSingleProcessPrivilege	1076	WMIC.exe
Token: SeIncBasePriorityPrivilege	1076	WMIC.exe
Token: SeCreatePagefilePrivilege	1076	WMIC.exe
Token: SeBackupPrivilege	1076	WMIC.exe
Token: SeRestorePrivilege	1076	WMIC.exe
Token: SeShutdownPrivilege	1076	WMIC.exe
Token: SeDebugPrivilege	1076	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1076	WMIC.exe
Token: SeRemoteShutdownPrivilege	1076	WMIC.exe
Token: SeUndockPrivilege	1076	WMIC.exe
Token: SeManageVolumePrivilege	1076	WMIC.exe
Token: 33	1076	WMIC.exe
Token: 34	1076	WMIC.exe
Token: 35	1076	WMIC.exe
Token: SeBackupPrivilege	2112	wbengine.exe
Token: SeRestorePrivilege	2112	wbengine.exe
Token: SeSecurityPrivilege	2112	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exesvchoster.execmd.execmd.execmd.exe

description	pid	Process	procid_target
PID 2144 wrote to memory of 2948	2144	be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe	30
PID 2144 wrote to memory of 2948	2144	be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe	30
PID 2144 wrote to memory of 2948	2144	be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe	30
PID 2948 wrote to memory of 1096	2948	svchoster.exe	31
PID 2948 wrote to memory of 1096	2948	svchoster.exe	31
PID 2948 wrote to memory of 1096	2948	svchoster.exe	31
PID 1096 wrote to memory of 400	1096	cmd.exe	33
PID 1096 wrote to memory of 400	1096	cmd.exe	33
PID 1096 wrote to memory of 400	1096	cmd.exe	33
PID 1096 wrote to memory of 1076	1096	cmd.exe	37
PID 1096 wrote to memory of 1076	1096	cmd.exe	37
PID 1096 wrote to memory of 1076	1096	cmd.exe	37
PID 2948 wrote to memory of 2788	2948	svchoster.exe	39
PID 2948 wrote to memory of 2788	2948	svchoster.exe	39
PID 2948 wrote to memory of 2788	2948	svchoster.exe	39
PID 2788 wrote to memory of 1628	2788	cmd.exe	41
PID 2788 wrote to memory of 1628	2788	cmd.exe	41
PID 2788 wrote to memory of 1628	2788	cmd.exe	41
PID 2788 wrote to memory of 1712	2788	cmd.exe	42
PID 2788 wrote to memory of 1712	2788	cmd.exe	42
PID 2788 wrote to memory of 1712	2788	cmd.exe	42
PID 2948 wrote to memory of 1952	2948	svchoster.exe	43
PID 2948 wrote to memory of 1952	2948	svchoster.exe	43
PID 2948 wrote to memory of 1952	2948	svchoster.exe	43
PID 1952 wrote to memory of 320	1952	cmd.exe	45
PID 1952 wrote to memory of 320	1952	cmd.exe	45
PID 1952 wrote to memory of 320	1952	cmd.exe	45
PID 2948 wrote to memory of 1164	2948	svchoster.exe	49
PID 2948 wrote to memory of 1164	2948	svchoster.exe	49
PID 2948 wrote to memory of 1164	2948	svchoster.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\be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe
"C:\Users\Admin\AppData\Local\Temp\be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2144
- C:\Users\Admin\AppData\Roaming\svchoster.exe
  "C:\Users\Admin\AppData\Roaming\svchoster.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:2948
- - 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:1096
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:400
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1076
- - 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:2788
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1628
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1712
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1952
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:320
- - 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:1164

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2960

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2112

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2092

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2176

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

Modify Registry

T1112

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

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

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

Filesize
142KB

MD5
af70883f7ff9f9c19286ed07972bab84

SHA1
5d59cc33696cdc78f59448f2f6fb6cb08622b976

SHA256
be41b813b1af4634ec14cb822090bb16e300dc61f478c473ac3b18e6dc025150

SHA512
bfea6fa338ad9bb2be18a7fe1398d82f01258be0f57a3f2129a2b3e08342771faca874dcf0f257b54b14c49003789f139fe8fe9e5ca6b53d352670f6549438d1

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

Filesize
111B

MD5
016ab2aa899fdab8fe2dd4c4bb73548d

SHA1
2bf57b835d272a3b0b5f29fb145ac6bd509cd53c

SHA256
223706ee4377f157850bdffaa87c85ce49fb15bade70d08e19c3138106134748

SHA512
d46b73dd0ff072904b513dce54c164a30e0262b735d9254ffc7b596a2e691b2aa20ef57c82e95667ac5e051fbcc8be0bd82a49bdf0795058ab0a2b6ca3da3dab

Download Submit
memory/2144-0-0x000007FEF6123000-0x000007FEF6124000-memory.dmp

Filesize
4KB

Download
memory/2144-1-0x0000000000A10000-0x0000000000A3A000-memory.dmp

Filesize
168KB

Download
memory/2948-7-0x0000000000A20000-0x0000000000A4A000-memory.dmp

Filesize
168KB

Download
memory/2948-72-0x000007FEF5730000-0x000007FEF611C000-memory.dmp

Filesize
9.9MB

Download
memory/2948-73-0x000007FEF5733000-0x000007FEF5734000-memory.dmp

Filesize
4KB

Download
memory/2948-74-0x000007FEF5730000-0x000007FEF611C000-memory.dmp

Filesize
9.9MB

Download