chaos | 329dc7144e9e0e49aa9b7e3d495eb2a329579ea9d68249f93c3942179ece3cf6

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
20-04-2024 03:48

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General

Target

2024-04-20_7b3efaefb41b7136502139438a6968e4_wannacry.exe
Size

301KB
MD5

7b3efaefb41b7136502139438a6968e4
SHA1

84b25e639e5e1ee0519d5731a7810e0a312f3010
SHA256

329dc7144e9e0e49aa9b7e3d495eb2a329579ea9d68249f93c3942179ece3cf6
SHA512

62646bdbfa3ca43327885c93f2b6821f1f3c896791a147aa0981f1be269cc19eb77050f0305d0ac3c1db8e868894523d785c8b7059d264d9fb653c4d47357777
SSDEEP

3072:D3kcMHr9irIKH11poMiMiHuZDLJ2YR7c2ytBcL5BdkwvTkmEd:hEr9irIava+ZWwvqd

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Extracted

Path

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

Family

chaos

Ransom Note

----> Chaos is multi language ransomware. Translate your note to any language <---- All of your files have been encrypted Your computer was infected with a ransomware virus. Your files have been encrypted and you won't be able to decrypt them without our help.What can I do to get my files back?You can buy our special decryption software, this software will allow you to recover all of your data and remove the ransomware from your computer.The price for the software is $1,500. Payment can be made in Bitcoin only. How do I pay, where do I get Bitcoin? Purchasing Bitcoin varies from country to country, you are best advised to do a quick google search yourself to find out how to buy Bitcoin. Many of our customers have reported these sites to be fast and reliable: Coinmama - hxxps://www.coinmama.com Bitpanda - hxxps://www.bitpanda.com Payment informationAmount: 0.1473766 BTC Bitcoin Address: bc1qlnzcep4l4ac0ttdrq7awxev9ehu465f2vpt9x0

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/1968-0-0x0000000000050000-0x00000000000A2000-memory.dmp	family_chaos
behavioral1/files/0x000a00000001418d-4.dat	family_chaos
behavioral1/memory/2976-7-0x0000000000B00000-0x0000000000B52000-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

Detects command variations typically used by ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/1968-0-0x0000000000050000-0x00000000000A2000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000a00000001418d-4.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2976-7-0x0000000000B00000-0x0000000000B52000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2920	bcdedit.exe
1228	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
688	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	C11Setup.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\C11Setup.url	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	C11Setup.exe

Executes dropped EXE 1 IoCs

pid	Process
2976	C11Setup.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\Music\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	C11Setup.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2297530677-1229052932-2803917579-1000\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	C11Setup.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	C11Setup.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-1-5-21-2297530677-1229052932-2803917579-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\nzr6a8exs.jpg"	C11Setup.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

pid	Process
2884	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
948	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2976	C11Setup.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1968	2024-04-20_7b3efaefb41b7136502139438a6968e4_wannacry.exe
1968	2024-04-20_7b3efaefb41b7136502139438a6968e4_wannacry.exe
2976	C11Setup.exe
2976	C11Setup.exe
2976	C11Setup.exe
2976	C11Setup.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1968	2024-04-20_7b3efaefb41b7136502139438a6968e4_wannacry.exe
Token: SeDebugPrivilege	2976	C11Setup.exe
Token: SeBackupPrivilege	2396	vssvc.exe
Token: SeRestorePrivilege	2396	vssvc.exe
Token: SeAuditPrivilege	2396	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1328	WMIC.exe
Token: SeSecurityPrivilege	1328	WMIC.exe
Token: SeTakeOwnershipPrivilege	1328	WMIC.exe
Token: SeLoadDriverPrivilege	1328	WMIC.exe
Token: SeSystemProfilePrivilege	1328	WMIC.exe
Token: SeSystemtimePrivilege	1328	WMIC.exe
Token: SeProfSingleProcessPrivilege	1328	WMIC.exe
Token: SeIncBasePriorityPrivilege	1328	WMIC.exe
Token: SeCreatePagefilePrivilege	1328	WMIC.exe
Token: SeBackupPrivilege	1328	WMIC.exe
Token: SeRestorePrivilege	1328	WMIC.exe
Token: SeShutdownPrivilege	1328	WMIC.exe
Token: SeDebugPrivilege	1328	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1328	WMIC.exe
Token: SeRemoteShutdownPrivilege	1328	WMIC.exe
Token: SeUndockPrivilege	1328	WMIC.exe
Token: SeManageVolumePrivilege	1328	WMIC.exe
Token: 33	1328	WMIC.exe
Token: 34	1328	WMIC.exe
Token: 35	1328	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1328	WMIC.exe
Token: SeSecurityPrivilege	1328	WMIC.exe
Token: SeTakeOwnershipPrivilege	1328	WMIC.exe
Token: SeLoadDriverPrivilege	1328	WMIC.exe
Token: SeSystemProfilePrivilege	1328	WMIC.exe
Token: SeSystemtimePrivilege	1328	WMIC.exe
Token: SeProfSingleProcessPrivilege	1328	WMIC.exe
Token: SeIncBasePriorityPrivilege	1328	WMIC.exe
Token: SeCreatePagefilePrivilege	1328	WMIC.exe
Token: SeBackupPrivilege	1328	WMIC.exe
Token: SeRestorePrivilege	1328	WMIC.exe
Token: SeShutdownPrivilege	1328	WMIC.exe
Token: SeDebugPrivilege	1328	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1328	WMIC.exe
Token: SeRemoteShutdownPrivilege	1328	WMIC.exe
Token: SeUndockPrivilege	1328	WMIC.exe
Token: SeManageVolumePrivilege	1328	WMIC.exe
Token: 33	1328	WMIC.exe
Token: 34	1328	WMIC.exe
Token: 35	1328	WMIC.exe
Token: SeBackupPrivilege	2232	wbengine.exe
Token: SeRestorePrivilege	2232	wbengine.exe
Token: SeSecurityPrivilege	2232	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 2976	1968	2024-04-20_7b3efaefb41b7136502139438a6968e4_wannacry.exe	28
PID 1968 wrote to memory of 2976	1968	2024-04-20_7b3efaefb41b7136502139438a6968e4_wannacry.exe	28
PID 1968 wrote to memory of 2976	1968	2024-04-20_7b3efaefb41b7136502139438a6968e4_wannacry.exe	28
PID 2976 wrote to memory of 2956	2976	C11Setup.exe	29
PID 2976 wrote to memory of 2956	2976	C11Setup.exe	29
PID 2976 wrote to memory of 2956	2976	C11Setup.exe	29
PID 2956 wrote to memory of 2884	2956	cmd.exe	31
PID 2956 wrote to memory of 2884	2956	cmd.exe	31
PID 2956 wrote to memory of 2884	2956	cmd.exe	31
PID 2956 wrote to memory of 1328	2956	cmd.exe	35
PID 2956 wrote to memory of 1328	2956	cmd.exe	35
PID 2956 wrote to memory of 1328	2956	cmd.exe	35
PID 2976 wrote to memory of 2928	2976	C11Setup.exe	37
PID 2976 wrote to memory of 2928	2976	C11Setup.exe	37
PID 2976 wrote to memory of 2928	2976	C11Setup.exe	37
PID 2928 wrote to memory of 2920	2928	cmd.exe	39
PID 2928 wrote to memory of 2920	2928	cmd.exe	39
PID 2928 wrote to memory of 2920	2928	cmd.exe	39
PID 2928 wrote to memory of 1228	2928	cmd.exe	40
PID 2928 wrote to memory of 1228	2928	cmd.exe	40
PID 2928 wrote to memory of 1228	2928	cmd.exe	40
PID 2976 wrote to memory of 1028	2976	C11Setup.exe	41
PID 2976 wrote to memory of 1028	2976	C11Setup.exe	41
PID 2976 wrote to memory of 1028	2976	C11Setup.exe	41
PID 1028 wrote to memory of 688	1028	cmd.exe	43
PID 1028 wrote to memory of 688	1028	cmd.exe	43
PID 1028 wrote to memory of 688	1028	cmd.exe	43
PID 2976 wrote to memory of 948	2976	C11Setup.exe	47
PID 2976 wrote to memory of 948	2976	C11Setup.exe	47
PID 2976 wrote to memory of 948	2976	C11Setup.exe	47

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\2024-04-20_7b3efaefb41b7136502139438a6968e4_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_7b3efaefb41b7136502139438a6968e4_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1968
- C:\Users\Admin\AppData\Roaming\C11Setup.exe
  "C:\Users\Admin\AppData\Roaming\C11Setup.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:2976
- - 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:2956
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2884
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1328
- - 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:2928
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2920
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1228
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1028
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:688
- - 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:948

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2396

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2232

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2280

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2712

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

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\C11Setup.exe

Filesize
301KB

MD5
7b3efaefb41b7136502139438a6968e4

SHA1
84b25e639e5e1ee0519d5731a7810e0a312f3010

SHA256
329dc7144e9e0e49aa9b7e3d495eb2a329579ea9d68249f93c3942179ece3cf6

SHA512
62646bdbfa3ca43327885c93f2b6821f1f3c896791a147aa0981f1be269cc19eb77050f0305d0ac3c1db8e868894523d785c8b7059d264d9fb653c4d47357777

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

Filesize
964B

MD5
4217b8b83ce3c3f70029a056546f8fd0

SHA1
487cdb5733d073a0427418888e8f7070fe782a03

SHA256
7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

SHA512
2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

Download Submit
memory/1968-0-0x0000000000050000-0x00000000000A2000-memory.dmp

Filesize
328KB

Download
memory/1968-1-0x000007FEF5360000-0x000007FEF5D4C000-memory.dmp

Filesize
9.9MB

Download
memory/1968-8-0x000007FEF5360000-0x000007FEF5D4C000-memory.dmp

Filesize
9.9MB

Download
memory/2976-9-0x000007FEF5360000-0x000007FEF5D4C000-memory.dmp

Filesize
9.9MB

Download
memory/2976-7-0x0000000000B00000-0x0000000000B52000-memory.dmp

Filesize
328KB

Download
memory/2976-73-0x000000001B0B0000-0x000000001B130000-memory.dmp

Filesize
512KB

Download
memory/2976-74-0x000007FEF5360000-0x000007FEF5D4C000-memory.dmp

Filesize
9.9MB

Download
memory/2976-75-0x000000001B0B0000-0x000000001B130000-memory.dmp

Filesize
512KB

Download