chaos | c9bd1abfb6e520d973284f2fbebaf14cd1cf5db7c2e2956e9d4a9b0564547b81

Analysis

max time kernel
121s
max time network
121s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
22/05/2024, 09:49

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General

Target

2024-05-22_731178dd28d3b8ee829fb6ac4d3c065a_wannacry.exe
Size

323KB
MD5

731178dd28d3b8ee829fb6ac4d3c065a
SHA1

11c4a6be0a123812b916d4a8eba96857f311d906
SHA256

c9bd1abfb6e520d973284f2fbebaf14cd1cf5db7c2e2956e9d4a9b0564547b81
SHA512

9d2b61b08b9d1b8503ae647d27d5cf4604dfc81ff2c923933ea3bae473d8a3a4bdfe7032486baf1dfe5a28c51bc1f57a79f07ac289e045087dd9ebbbc870c024
SSDEEP

3072:ooy4lr9N4L/mQZt2FWtMB6w31viSYrwCa2CybjDjBJRrrS0n4+3GK2vVort6jbQG:fr9N4LS6MBrYH3vxshzmZ6jO7SV2

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/1976-1-0x0000000000830000-0x0000000000888000-memory.dmp	family_chaos
behavioral1/files/0x000c00000001226d-5.dat	family_chaos
behavioral1/memory/2268-8-0x0000000000AF0000-0x0000000000B48000-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/1976-1-0x0000000000830000-0x0000000000888000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000c00000001226d-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2268-8-0x0000000000AF0000-0x0000000000B48000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1100	bcdedit.exe
2780	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
1692	wbadmin.exe

Drops startup file 3 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2268	Update.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\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	Update.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	Update.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	Update.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	Update.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3691908287-3775019229-3534252667-1000\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	Update.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	Update.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	Update.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	Update.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	Update.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	Update.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	Update.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-1-5-21-3691908287-3775019229-3534252667-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\72ntt7dp7.jpg"	Update.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
848	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1744	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2268	Update.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1976	2024-05-22_731178dd28d3b8ee829fb6ac4d3c065a_wannacry.exe
1976	2024-05-22_731178dd28d3b8ee829fb6ac4d3c065a_wannacry.exe
2268	Update.exe
2268	Update.exe
2268	Update.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	2024-05-22_731178dd28d3b8ee829fb6ac4d3c065a_wannacry.exe
Token: SeDebugPrivilege	2268	Update.exe
Token: SeBackupPrivilege	2652	vssvc.exe
Token: SeRestorePrivilege	2652	vssvc.exe
Token: SeAuditPrivilege	2652	vssvc.exe
Token: SeIncreaseQuotaPrivilege	288	WMIC.exe
Token: SeSecurityPrivilege	288	WMIC.exe
Token: SeTakeOwnershipPrivilege	288	WMIC.exe
Token: SeLoadDriverPrivilege	288	WMIC.exe
Token: SeSystemProfilePrivilege	288	WMIC.exe
Token: SeSystemtimePrivilege	288	WMIC.exe
Token: SeProfSingleProcessPrivilege	288	WMIC.exe
Token: SeIncBasePriorityPrivilege	288	WMIC.exe
Token: SeCreatePagefilePrivilege	288	WMIC.exe
Token: SeBackupPrivilege	288	WMIC.exe
Token: SeRestorePrivilege	288	WMIC.exe
Token: SeShutdownPrivilege	288	WMIC.exe
Token: SeDebugPrivilege	288	WMIC.exe
Token: SeSystemEnvironmentPrivilege	288	WMIC.exe
Token: SeRemoteShutdownPrivilege	288	WMIC.exe
Token: SeUndockPrivilege	288	WMIC.exe
Token: SeManageVolumePrivilege	288	WMIC.exe
Token: 33	288	WMIC.exe
Token: 34	288	WMIC.exe
Token: 35	288	WMIC.exe
Token: SeIncreaseQuotaPrivilege	288	WMIC.exe
Token: SeSecurityPrivilege	288	WMIC.exe
Token: SeTakeOwnershipPrivilege	288	WMIC.exe
Token: SeLoadDriverPrivilege	288	WMIC.exe
Token: SeSystemProfilePrivilege	288	WMIC.exe
Token: SeSystemtimePrivilege	288	WMIC.exe
Token: SeProfSingleProcessPrivilege	288	WMIC.exe
Token: SeIncBasePriorityPrivilege	288	WMIC.exe
Token: SeCreatePagefilePrivilege	288	WMIC.exe
Token: SeBackupPrivilege	288	WMIC.exe
Token: SeRestorePrivilege	288	WMIC.exe
Token: SeShutdownPrivilege	288	WMIC.exe
Token: SeDebugPrivilege	288	WMIC.exe
Token: SeSystemEnvironmentPrivilege	288	WMIC.exe
Token: SeRemoteShutdownPrivilege	288	WMIC.exe
Token: SeUndockPrivilege	288	WMIC.exe
Token: SeManageVolumePrivilege	288	WMIC.exe
Token: 33	288	WMIC.exe
Token: 34	288	WMIC.exe
Token: 35	288	WMIC.exe
Token: SeBackupPrivilege	2792	wbengine.exe
Token: SeRestorePrivilege	2792	wbengine.exe
Token: SeSecurityPrivilege	2792	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 2268	1976	2024-05-22_731178dd28d3b8ee829fb6ac4d3c065a_wannacry.exe	28
PID 1976 wrote to memory of 2268	1976	2024-05-22_731178dd28d3b8ee829fb6ac4d3c065a_wannacry.exe	28
PID 1976 wrote to memory of 2268	1976	2024-05-22_731178dd28d3b8ee829fb6ac4d3c065a_wannacry.exe	28
PID 2268 wrote to memory of 860	2268	Update.exe	30
PID 2268 wrote to memory of 860	2268	Update.exe	30
PID 2268 wrote to memory of 860	2268	Update.exe	30
PID 860 wrote to memory of 848	860	cmd.exe	32
PID 860 wrote to memory of 848	860	cmd.exe	32
PID 860 wrote to memory of 848	860	cmd.exe	32
PID 860 wrote to memory of 288	860	cmd.exe	35
PID 860 wrote to memory of 288	860	cmd.exe	35
PID 860 wrote to memory of 288	860	cmd.exe	35
PID 2268 wrote to memory of 2172	2268	Update.exe	37
PID 2268 wrote to memory of 2172	2268	Update.exe	37
PID 2268 wrote to memory of 2172	2268	Update.exe	37
PID 2172 wrote to memory of 1100	2172	cmd.exe	39
PID 2172 wrote to memory of 1100	2172	cmd.exe	39
PID 2172 wrote to memory of 1100	2172	cmd.exe	39
PID 2172 wrote to memory of 2780	2172	cmd.exe	40
PID 2172 wrote to memory of 2780	2172	cmd.exe	40
PID 2172 wrote to memory of 2780	2172	cmd.exe	40
PID 2268 wrote to memory of 1220	2268	Update.exe	41
PID 2268 wrote to memory of 1220	2268	Update.exe	41
PID 2268 wrote to memory of 1220	2268	Update.exe	41
PID 1220 wrote to memory of 1692	1220	cmd.exe	43
PID 1220 wrote to memory of 1692	1220	cmd.exe	43
PID 1220 wrote to memory of 1692	1220	cmd.exe	43
PID 2268 wrote to memory of 1744	2268	Update.exe	47
PID 2268 wrote to memory of 1744	2268	Update.exe	47
PID 2268 wrote to memory of 1744	2268	Update.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\2024-05-22_731178dd28d3b8ee829fb6ac4d3c065a_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_731178dd28d3b8ee829fb6ac4d3c065a_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Users\Admin\AppData\Roaming\Update.exe
  "C:\Users\Admin\AppData\Roaming\Update.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:2268
- - 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:860
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:848
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:288
- - 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:2172
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1100
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2780
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1220
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1692
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\OPEN_THIS.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1744

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2652

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2792

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1204

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1840

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

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Downloads

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

Filesize
323KB

MD5
731178dd28d3b8ee829fb6ac4d3c065a

SHA1
11c4a6be0a123812b916d4a8eba96857f311d906

SHA256
c9bd1abfb6e520d973284f2fbebaf14cd1cf5db7c2e2956e9d4a9b0564547b81

SHA512
9d2b61b08b9d1b8503ae647d27d5cf4604dfc81ff2c923933ea3bae473d8a3a4bdfe7032486baf1dfe5a28c51bc1f57a79f07ac289e045087dd9ebbbc870c024

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

Filesize
758B

MD5
745498991ec43eb0d48752bf88932dc4

SHA1
92bdbff4154276f56455f1a521ba89dae6623b99

SHA256
34c42da9263345dd5cd1e1999ae6cc5d651505c7ac8e83fc79870c5401c4316a

SHA512
2c5e027393f4a74c688193c0de18a4c5d92186a466b09f9e10f3bd213d6be1ba4e47176cbac3d85b92b924d62b4db478caac2172959a8eeb23f8e9081476b778

Download Submit
memory/1976-0-0x000007FEF52F3000-0x000007FEF52F4000-memory.dmp

Filesize
4KB

Download
memory/1976-1-0x0000000000830000-0x0000000000888000-memory.dmp

Filesize
352KB

Download
memory/2268-7-0x000007FEF4903000-0x000007FEF4904000-memory.dmp

Filesize
4KB

Download
memory/2268-8-0x0000000000AF0000-0x0000000000B48000-memory.dmp

Filesize
352KB

Download
memory/2268-30-0x000007FEF4900000-0x000007FEF52EC000-memory.dmp

Filesize
9.9MB

Download
memory/2268-472-0x000007FEF4903000-0x000007FEF4904000-memory.dmp

Filesize
4KB

Download
memory/2268-473-0x000007FEF4900000-0x000007FEF52EC000-memory.dmp

Filesize
9.9MB

Download