chaos | a2f989afcba6ea097fa104c313a1626bf6cdaffe80b000e247f36b8d3906acf6

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
15-06-2024 12:45

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
Size

331KB
MD5

1484bfc72f2a31fec076b48d4e687a98
SHA1

9f019893c50d17cd6b930112bb657254057eb694
SHA256

a2f989afcba6ea097fa104c313a1626bf6cdaffe80b000e247f36b8d3906acf6
SHA512

5e2d0ba2639af86b7b423b65cf2e16a7e2335da7c51e827f7f1f00f460f3a8c46b70f789f5d4264a58c17121424fa979307b60017e3a01726df4e0a65e0ced72
SSDEEP

1536:C3kIZridr9SHyB2CNaLGpf9aJfXgY1zUTyr5hV:C3kCidr9S0NaKpf+XgTTSj

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/2764-1-0x0000000000980000-0x00000000009D8000-memory.dmp	family_chaos
behavioral1/files/0x0009000000012280-5.dat	family_chaos
behavioral1/memory/2768-7-0x0000000000AA0000-0x0000000000AF8000-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

Detects command variations typically used by ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2764-1-0x0000000000980000-0x00000000009D8000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x0009000000012280-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2768-7-0x0000000000AA0000-0x0000000000AF8000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
752	bcdedit.exe
1456	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
800	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	rundll32.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ntdfrag.txt	rundll32.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\rundll32.url	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
2768	rundll32.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\SendTo\Desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	rundll32.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-39690363-730359138-1046745555-1000\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	rundll32.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	rundll32.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-1-5-21-39690363-730359138-1046745555-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\zwi7xtl2e.jpg"	rundll32.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
1372	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1844	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2768	rundll32.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2764	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
2764	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
2768	rundll32.exe
2768	rundll32.exe
2768	rundll32.exe
2768	rundll32.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2764	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
Token: SeDebugPrivilege	2768	rundll32.exe
Token: SeBackupPrivilege	936	vssvc.exe
Token: SeRestorePrivilege	936	vssvc.exe
Token: SeAuditPrivilege	936	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1920	WMIC.exe
Token: SeSecurityPrivilege	1920	WMIC.exe
Token: SeTakeOwnershipPrivilege	1920	WMIC.exe
Token: SeLoadDriverPrivilege	1920	WMIC.exe
Token: SeSystemProfilePrivilege	1920	WMIC.exe
Token: SeSystemtimePrivilege	1920	WMIC.exe
Token: SeProfSingleProcessPrivilege	1920	WMIC.exe
Token: SeIncBasePriorityPrivilege	1920	WMIC.exe
Token: SeCreatePagefilePrivilege	1920	WMIC.exe
Token: SeBackupPrivilege	1920	WMIC.exe
Token: SeRestorePrivilege	1920	WMIC.exe
Token: SeShutdownPrivilege	1920	WMIC.exe
Token: SeDebugPrivilege	1920	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1920	WMIC.exe
Token: SeRemoteShutdownPrivilege	1920	WMIC.exe
Token: SeUndockPrivilege	1920	WMIC.exe
Token: SeManageVolumePrivilege	1920	WMIC.exe
Token: 33	1920	WMIC.exe
Token: 34	1920	WMIC.exe
Token: 35	1920	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1920	WMIC.exe
Token: SeSecurityPrivilege	1920	WMIC.exe
Token: SeTakeOwnershipPrivilege	1920	WMIC.exe
Token: SeLoadDriverPrivilege	1920	WMIC.exe
Token: SeSystemProfilePrivilege	1920	WMIC.exe
Token: SeSystemtimePrivilege	1920	WMIC.exe
Token: SeProfSingleProcessPrivilege	1920	WMIC.exe
Token: SeIncBasePriorityPrivilege	1920	WMIC.exe
Token: SeCreatePagefilePrivilege	1920	WMIC.exe
Token: SeBackupPrivilege	1920	WMIC.exe
Token: SeRestorePrivilege	1920	WMIC.exe
Token: SeShutdownPrivilege	1920	WMIC.exe
Token: SeDebugPrivilege	1920	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1920	WMIC.exe
Token: SeRemoteShutdownPrivilege	1920	WMIC.exe
Token: SeUndockPrivilege	1920	WMIC.exe
Token: SeManageVolumePrivilege	1920	WMIC.exe
Token: 33	1920	WMIC.exe
Token: 34	1920	WMIC.exe
Token: 35	1920	WMIC.exe
Token: SeBackupPrivilege	2292	wbengine.exe
Token: SeRestorePrivilege	2292	wbengine.exe
Token: SeSecurityPrivilege	2292	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 2768	2764	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe	28
PID 2764 wrote to memory of 2768	2764	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe	28
PID 2764 wrote to memory of 2768	2764	2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe	28
PID 2768 wrote to memory of 760	2768	rundll32.exe	30
PID 2768 wrote to memory of 760	2768	rundll32.exe	30
PID 2768 wrote to memory of 760	2768	rundll32.exe	30
PID 760 wrote to memory of 1372	760	cmd.exe	32
PID 760 wrote to memory of 1372	760	cmd.exe	32
PID 760 wrote to memory of 1372	760	cmd.exe	32
PID 760 wrote to memory of 1920	760	cmd.exe	35
PID 760 wrote to memory of 1920	760	cmd.exe	35
PID 760 wrote to memory of 1920	760	cmd.exe	35
PID 2768 wrote to memory of 1088	2768	rundll32.exe	37
PID 2768 wrote to memory of 1088	2768	rundll32.exe	37
PID 2768 wrote to memory of 1088	2768	rundll32.exe	37
PID 1088 wrote to memory of 752	1088	cmd.exe	39
PID 1088 wrote to memory of 752	1088	cmd.exe	39
PID 1088 wrote to memory of 752	1088	cmd.exe	39
PID 1088 wrote to memory of 1456	1088	cmd.exe	40
PID 1088 wrote to memory of 1456	1088	cmd.exe	40
PID 1088 wrote to memory of 1456	1088	cmd.exe	40
PID 2768 wrote to memory of 1816	2768	rundll32.exe	41
PID 2768 wrote to memory of 1816	2768	rundll32.exe	41
PID 2768 wrote to memory of 1816	2768	rundll32.exe	41
PID 1816 wrote to memory of 800	1816	cmd.exe	43
PID 1816 wrote to memory of 800	1816	cmd.exe	43
PID 1816 wrote to memory of 800	1816	cmd.exe	43
PID 2768 wrote to memory of 1844	2768	rundll32.exe	47
PID 2768 wrote to memory of 1844	2768	rundll32.exe	47
PID 2768 wrote to memory of 1844	2768	rundll32.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\2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-15_1484bfc72f2a31fec076b48d4e687a98_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Users\Admin\AppData\Roaming\rundll32.exe
  "C:\Users\Admin\AppData\Roaming\rundll32.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:2768
- - 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:760
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1372
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1920
- - 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:1088
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:752
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1456
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1816
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:800
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\ntdfrag.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1844

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:936

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2292

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2272

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2836

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

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\rundll32.exe

Filesize
331KB

MD5
1484bfc72f2a31fec076b48d4e687a98

SHA1
9f019893c50d17cd6b930112bb657254057eb694

SHA256
a2f989afcba6ea097fa104c313a1626bf6cdaffe80b000e247f36b8d3906acf6

SHA512
5e2d0ba2639af86b7b423b65cf2e16a7e2335da7c51e827f7f1f00f460f3a8c46b70f789f5d4264a58c17121424fa979307b60017e3a01726df4e0a65e0ced72

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

Filesize
417B

MD5
472fc50a9628a8c68903831262a89cd4

SHA1
aba3be175059e58ea67f458b9e8b5540183e7f0e

SHA256
7a9aa52e802f5d0956814597d1b9317a393ab68bac6324cefbbf21869a884923

SHA512
9b16767e9cc421982638428043ddef638e9a7f2ff0d67ce52909486f9d8f88e9b4e988bdd93eabfa6472ce99528afc21f9c4c7510fe5c72ec5572b19536446ba

Download Submit
memory/2764-0-0x000007FEF5D53000-0x000007FEF5D54000-memory.dmp

Filesize
4KB

Download
memory/2764-1-0x0000000000980000-0x00000000009D8000-memory.dmp

Filesize
352KB

Download
memory/2768-7-0x0000000000AA0000-0x0000000000AF8000-memory.dmp

Filesize
352KB

Download
memory/2768-25-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/2768-74-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/2768-75-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/2768-76-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download