chaos | 897a5aba27fb713b468c4788ef1a3b8bb4d595afbeb94a3caf7ad6ee11a02361

Analysis

max time kernel
37s
max time network
16s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
20-07-2024 07:50

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General

Target

software.exe
Size

588KB
MD5

e7448d342d7e89f6fa442e0e1dc93c08
SHA1

4b42759041cb3a27318d063af1c9c1c8d35c6ef4
SHA256

897a5aba27fb713b468c4788ef1a3b8bb4d595afbeb94a3caf7ad6ee11a02361
SHA512

55750a59d25a1e127010fbd6fc05d0b9e5eafb331bf22f082a5d9f9dc0e601a792805de6b016344ac8763dfbad90f9ce87f205ef1df271a28cc015345d31f435
SSDEEP

6144:cr9iJVLaPXguyOiMV7BoV/q+qbJu2hTMKZwHNsp+l3QiiWKO+LL:haMOTV7BoVi+qbJueTRZn+l3QiOn

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/1976-1-0x0000000001050000-0x00000000010EA000-memory.dmp	family_chaos
behavioral1/files/0x0007000000012118-4.dat	family_chaos
behavioral1/memory/2688-7-0x0000000000FA0000-0x000000000103A000-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
3068	bcdedit.exe
2928	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

pid	Process
1760	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt	svchost.exe
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

Executes dropped EXE 1 IoCs

pid	Process
2688	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

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
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\Recent\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\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\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\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\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\System Tools\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\Internet Explorer\Quick Launch\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\Contacts\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\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2958949473-3205530200-1453100116-1000\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\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\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1edp27n6f.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 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
2628	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
800	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2688	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1976	software.exe
1976	software.exe
1976	software.exe
2688	svchost.exe
2688	svchost.exe
2688	svchost.exe
2688	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	software.exe
Token: SeDebugPrivilege	2688	svchost.exe
Token: SeBackupPrivilege	3060	vssvc.exe
Token: SeRestorePrivilege	3060	vssvc.exe
Token: SeAuditPrivilege	3060	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2668	WMIC.exe
Token: SeSecurityPrivilege	2668	WMIC.exe
Token: SeTakeOwnershipPrivilege	2668	WMIC.exe
Token: SeLoadDriverPrivilege	2668	WMIC.exe
Token: SeSystemProfilePrivilege	2668	WMIC.exe
Token: SeSystemtimePrivilege	2668	WMIC.exe
Token: SeProfSingleProcessPrivilege	2668	WMIC.exe
Token: SeIncBasePriorityPrivilege	2668	WMIC.exe
Token: SeCreatePagefilePrivilege	2668	WMIC.exe
Token: SeBackupPrivilege	2668	WMIC.exe
Token: SeRestorePrivilege	2668	WMIC.exe
Token: SeShutdownPrivilege	2668	WMIC.exe
Token: SeDebugPrivilege	2668	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2668	WMIC.exe
Token: SeRemoteShutdownPrivilege	2668	WMIC.exe
Token: SeUndockPrivilege	2668	WMIC.exe
Token: SeManageVolumePrivilege	2668	WMIC.exe
Token: 33	2668	WMIC.exe
Token: 34	2668	WMIC.exe
Token: 35	2668	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2668	WMIC.exe
Token: SeSecurityPrivilege	2668	WMIC.exe
Token: SeTakeOwnershipPrivilege	2668	WMIC.exe
Token: SeLoadDriverPrivilege	2668	WMIC.exe
Token: SeSystemProfilePrivilege	2668	WMIC.exe
Token: SeSystemtimePrivilege	2668	WMIC.exe
Token: SeProfSingleProcessPrivilege	2668	WMIC.exe
Token: SeIncBasePriorityPrivilege	2668	WMIC.exe
Token: SeCreatePagefilePrivilege	2668	WMIC.exe
Token: SeBackupPrivilege	2668	WMIC.exe
Token: SeRestorePrivilege	2668	WMIC.exe
Token: SeShutdownPrivilege	2668	WMIC.exe
Token: SeDebugPrivilege	2668	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2668	WMIC.exe
Token: SeRemoteShutdownPrivilege	2668	WMIC.exe
Token: SeUndockPrivilege	2668	WMIC.exe
Token: SeManageVolumePrivilege	2668	WMIC.exe
Token: 33	2668	WMIC.exe
Token: 34	2668	WMIC.exe
Token: 35	2668	WMIC.exe
Token: SeBackupPrivilege	2324	wbengine.exe
Token: SeRestorePrivilege	2324	wbengine.exe
Token: SeSecurityPrivilege	2324	wbengine.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
800	NOTEPAD.EXE

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 2688	1976	software.exe	31
PID 1976 wrote to memory of 2688	1976	software.exe	31
PID 1976 wrote to memory of 2688	1976	software.exe	31
PID 2688 wrote to memory of 2872	2688	svchost.exe	32
PID 2688 wrote to memory of 2872	2688	svchost.exe	32
PID 2688 wrote to memory of 2872	2688	svchost.exe	32
PID 2872 wrote to memory of 2628	2872	cmd.exe	34
PID 2872 wrote to memory of 2628	2872	cmd.exe	34
PID 2872 wrote to memory of 2628	2872	cmd.exe	34
PID 2872 wrote to memory of 2668	2872	cmd.exe	38
PID 2872 wrote to memory of 2668	2872	cmd.exe	38
PID 2872 wrote to memory of 2668	2872	cmd.exe	38
PID 2688 wrote to memory of 352	2688	svchost.exe	40
PID 2688 wrote to memory of 352	2688	svchost.exe	40
PID 2688 wrote to memory of 352	2688	svchost.exe	40
PID 352 wrote to memory of 3068	352	cmd.exe	42
PID 352 wrote to memory of 3068	352	cmd.exe	42
PID 352 wrote to memory of 3068	352	cmd.exe	42
PID 352 wrote to memory of 2928	352	cmd.exe	43
PID 352 wrote to memory of 2928	352	cmd.exe	43
PID 352 wrote to memory of 2928	352	cmd.exe	43
PID 2688 wrote to memory of 2848	2688	svchost.exe	44
PID 2688 wrote to memory of 2848	2688	svchost.exe	44
PID 2688 wrote to memory of 2848	2688	svchost.exe	44
PID 2848 wrote to memory of 1760	2848	cmd.exe	46
PID 2848 wrote to memory of 1760	2848	cmd.exe	46
PID 2848 wrote to memory of 1760	2848	cmd.exe	46
PID 2688 wrote to memory of 800	2688	svchost.exe	50
PID 2688 wrote to memory of 800	2688	svchost.exe	50
PID 2688 wrote to memory of 800	2688	svchost.exe	50

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\software.exe
"C:\Users\Admin\AppData\Local\Temp\software.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976
- 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:2688
- - 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:2872
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2628
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2668
- - 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:352
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:3068
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2928
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2848
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1760
- - 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)
    - Suspicious use of FindShellTrayWindow
    PID:800

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3060

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2324

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2456

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1224

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1524

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

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\svchost.exe

Filesize
588KB

MD5
e7448d342d7e89f6fa442e0e1dc93c08

SHA1
4b42759041cb3a27318d063af1c9c1c8d35c6ef4

SHA256
897a5aba27fb713b468c4788ef1a3b8bb4d595afbeb94a3caf7ad6ee11a02361

SHA512
55750a59d25a1e127010fbd6fc05d0b9e5eafb331bf22f082a5d9f9dc0e601a792805de6b016344ac8763dfbad90f9ce87f205ef1df271a28cc015345d31f435

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

Filesize
480B

MD5
57285d2fcf6f1a943a90b1abca3a5191

SHA1
1d7e84747a9b2763502787169907fc6bd6183047

SHA256
163526ec93c5c74cfa37ad2be9396a53398ac129cf358fd0a487656810bd3f8e

SHA512
98b2ab132c52136b6b6259f79ae3efc944a2b3e09619ea9a0daaffbed6dff8e7eade25ee876f0ea96aa1dd29cfe342c15eb4fafaecb85aea5c18cef5663d1632

Download Submit
memory/1976-0-0x000007FEF5EF3000-0x000007FEF5EF4000-memory.dmp

Filesize
4KB

Download
memory/1976-1-0x0000000001050000-0x00000000010EA000-memory.dmp

Filesize
616KB

Download
memory/2688-7-0x0000000000FA0000-0x000000000103A000-memory.dmp

Filesize
616KB

Download
memory/2688-11-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download
memory/2688-75-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download
memory/2688-76-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download
memory/2688-77-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download