chaos | 71af78b549961d7f2b3b493e79675ffad24c46b52e5b890eb6ab10654a57188a

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
19-05-2024 05:07

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-19_9d36b1ea9bb453d9e8a36a9c47093d8f_wannacry.exe
Size

190KB
MD5

9d36b1ea9bb453d9e8a36a9c47093d8f
SHA1

fc498d5362a09ee10587846a6827b9eee4b97071
SHA256

71af78b549961d7f2b3b493e79675ffad24c46b52e5b890eb6ab10654a57188a
SHA512

16e18d0e6d8683cba59c06f6dc083812ac95935bde9b300347f137445eac884c3c9a8d21a39d2d6fa023a8ab2238d4f7e84f95f7946d4c683f60880fe1f7baa6
SSDEEP

3072:VojMpkr9CYTDfGfse9dZ1Y7YHluSveP3JNs+zaQ15BMA7PUBmhgMcIeUw+1w+plq:Wxr9CY+fhhm7gcdP3z/BtPU0xZ1H

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/1724-1-0x0000000001040000-0x0000000001076000-memory.dmp	family_chaos
behavioral1/files/0x000c000000013ab9-5.dat	family_chaos
behavioral1/memory/3012-7-0x00000000011C0000-0x00000000011F6000-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/1724-1-0x0000000001040000-0x0000000001076000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000c000000013ab9-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/3012-7-0x00000000011C0000-0x00000000011F6000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1468	bcdedit.exe
1560	bcdedit.exe

Renames multiple (200) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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
872	wbadmin.exe

Drops startup file 3 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
3012	winlogon.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\Favorites\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	winlogon.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2248906074-2862704502-246302768-1000\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	winlogon.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	winlogon.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	winlogon.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-1-5-21-2248906074-2862704502-246302768-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8edca8kk7.jpg"	winlogon.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
1596	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
580	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3012	winlogon.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1724	2024-05-19_9d36b1ea9bb453d9e8a36a9c47093d8f_wannacry.exe
1724	2024-05-19_9d36b1ea9bb453d9e8a36a9c47093d8f_wannacry.exe
3012	winlogon.exe
3012	winlogon.exe
3012	winlogon.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1724	2024-05-19_9d36b1ea9bb453d9e8a36a9c47093d8f_wannacry.exe
Token: SeDebugPrivilege	3012	winlogon.exe
Token: SeBackupPrivilege	2424	vssvc.exe
Token: SeRestorePrivilege	2424	vssvc.exe
Token: SeAuditPrivilege	2424	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2092	WMIC.exe
Token: SeSecurityPrivilege	2092	WMIC.exe
Token: SeTakeOwnershipPrivilege	2092	WMIC.exe
Token: SeLoadDriverPrivilege	2092	WMIC.exe
Token: SeSystemProfilePrivilege	2092	WMIC.exe
Token: SeSystemtimePrivilege	2092	WMIC.exe
Token: SeProfSingleProcessPrivilege	2092	WMIC.exe
Token: SeIncBasePriorityPrivilege	2092	WMIC.exe
Token: SeCreatePagefilePrivilege	2092	WMIC.exe
Token: SeBackupPrivilege	2092	WMIC.exe
Token: SeRestorePrivilege	2092	WMIC.exe
Token: SeShutdownPrivilege	2092	WMIC.exe
Token: SeDebugPrivilege	2092	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2092	WMIC.exe
Token: SeRemoteShutdownPrivilege	2092	WMIC.exe
Token: SeUndockPrivilege	2092	WMIC.exe
Token: SeManageVolumePrivilege	2092	WMIC.exe
Token: 33	2092	WMIC.exe
Token: 34	2092	WMIC.exe
Token: 35	2092	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2092	WMIC.exe
Token: SeSecurityPrivilege	2092	WMIC.exe
Token: SeTakeOwnershipPrivilege	2092	WMIC.exe
Token: SeLoadDriverPrivilege	2092	WMIC.exe
Token: SeSystemProfilePrivilege	2092	WMIC.exe
Token: SeSystemtimePrivilege	2092	WMIC.exe
Token: SeProfSingleProcessPrivilege	2092	WMIC.exe
Token: SeIncBasePriorityPrivilege	2092	WMIC.exe
Token: SeCreatePagefilePrivilege	2092	WMIC.exe
Token: SeBackupPrivilege	2092	WMIC.exe
Token: SeRestorePrivilege	2092	WMIC.exe
Token: SeShutdownPrivilege	2092	WMIC.exe
Token: SeDebugPrivilege	2092	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2092	WMIC.exe
Token: SeRemoteShutdownPrivilege	2092	WMIC.exe
Token: SeUndockPrivilege	2092	WMIC.exe
Token: SeManageVolumePrivilege	2092	WMIC.exe
Token: 33	2092	WMIC.exe
Token: 34	2092	WMIC.exe
Token: 35	2092	WMIC.exe
Token: SeBackupPrivilege	1632	wbengine.exe
Token: SeRestorePrivilege	1632	wbengine.exe
Token: SeSecurityPrivilege	1632	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 3012	1724	2024-05-19_9d36b1ea9bb453d9e8a36a9c47093d8f_wannacry.exe	28
PID 1724 wrote to memory of 3012	1724	2024-05-19_9d36b1ea9bb453d9e8a36a9c47093d8f_wannacry.exe	28
PID 1724 wrote to memory of 3012	1724	2024-05-19_9d36b1ea9bb453d9e8a36a9c47093d8f_wannacry.exe	28
PID 3012 wrote to memory of 1572	3012	winlogon.exe	30
PID 3012 wrote to memory of 1572	3012	winlogon.exe	30
PID 3012 wrote to memory of 1572	3012	winlogon.exe	30
PID 1572 wrote to memory of 1596	1572	cmd.exe	32
PID 1572 wrote to memory of 1596	1572	cmd.exe	32
PID 1572 wrote to memory of 1596	1572	cmd.exe	32
PID 1572 wrote to memory of 2092	1572	cmd.exe	35
PID 1572 wrote to memory of 2092	1572	cmd.exe	35
PID 1572 wrote to memory of 2092	1572	cmd.exe	35
PID 3012 wrote to memory of 2700	3012	winlogon.exe	37
PID 3012 wrote to memory of 2700	3012	winlogon.exe	37
PID 3012 wrote to memory of 2700	3012	winlogon.exe	37
PID 2700 wrote to memory of 1468	2700	cmd.exe	39
PID 2700 wrote to memory of 1468	2700	cmd.exe	39
PID 2700 wrote to memory of 1468	2700	cmd.exe	39
PID 2700 wrote to memory of 1560	2700	cmd.exe	40
PID 2700 wrote to memory of 1560	2700	cmd.exe	40
PID 2700 wrote to memory of 1560	2700	cmd.exe	40
PID 3012 wrote to memory of 808	3012	winlogon.exe	41
PID 3012 wrote to memory of 808	3012	winlogon.exe	41
PID 3012 wrote to memory of 808	3012	winlogon.exe	41
PID 808 wrote to memory of 872	808	cmd.exe	43
PID 808 wrote to memory of 872	808	cmd.exe	43
PID 808 wrote to memory of 872	808	cmd.exe	43
PID 3012 wrote to memory of 580	3012	winlogon.exe	47
PID 3012 wrote to memory of 580	3012	winlogon.exe	47
PID 3012 wrote to memory of 580	3012	winlogon.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\2024-05-19_9d36b1ea9bb453d9e8a36a9c47093d8f_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-19_9d36b1ea9bb453d9e8a36a9c47093d8f_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Users\Admin\AppData\Roaming\winlogon.exe
  "C:\Users\Admin\AppData\Roaming\winlogon.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:3012
- - 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:1572
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1596
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2092
- - 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:2700
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1468
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1560
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:808
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:872
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\bot.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:580

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2424

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1632

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2032

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1868

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\winlogon.exe

Filesize
190KB

MD5
9d36b1ea9bb453d9e8a36a9c47093d8f

SHA1
fc498d5362a09ee10587846a6827b9eee4b97071

SHA256
71af78b549961d7f2b3b493e79675ffad24c46b52e5b890eb6ab10654a57188a

SHA512
16e18d0e6d8683cba59c06f6dc083812ac95935bde9b300347f137445eac884c3c9a8d21a39d2d6fa023a8ab2238d4f7e84f95f7946d4c683f60880fe1f7baa6

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

Filesize
45B

MD5
bcf472682e05a4d1702575cec94ed0da

SHA1
bd0c2afa0c2dce538cf492b2c08f7ed225f31151

SHA256
3d84a71533a29cb73dcc6b74464701ea6b27b493542281dc0968c7778fa78397

SHA512
e56d3da3a9378d938b68d2c7c9db2bd62b52c29911aedb7dbf321be13d625a2b77960b9c725ccf88fb6f6626dfb5a22fa7119153abd1ae3cbdb62b6e103cd86c

Download Submit
memory/1724-0-0x000007FEF5C33000-0x000007FEF5C34000-memory.dmp

Filesize
4KB

Download
memory/1724-1-0x0000000001040000-0x0000000001076000-memory.dmp

Filesize
216KB

Download
memory/3012-7-0x00000000011C0000-0x00000000011F6000-memory.dmp

Filesize
216KB

Download
memory/3012-17-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

Filesize
9.9MB

Download
memory/3012-22-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

Filesize
9.9MB

Download
memory/3012-464-0x000007FEF5C30000-0x000007FEF661C000-memory.dmp

Filesize
9.9MB

Download