chaos | 6783ca1fa4ed35e2a48464fbe3c6e9c09c7165e6d3802c8cc395889e4726c389

Analysis

max time kernel
122s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
07-08-2024 09:05

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General

Target

2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe
Size

279KB
MD5

9b838a440786b24df80da0637dff3ba0
SHA1

23ccd406239bdd950639cdd2a4382c602fa55aeb
SHA256

6783ca1fa4ed35e2a48464fbe3c6e9c09c7165e6d3802c8cc395889e4726c389
SHA512

ed8f0013bdd3cb09478bc07ad29827d556578168a6fffd1d0b23005e9fe29ba1364496bf3236e056fb8f623851165ee3945a8675b735527a2c7600599457639b
SSDEEP

6144:br9OIyJ7/+WZT1kRnSeXSX9MNzxiMwP2Oswd:fyJ7/+Wd1kRnFX4mNzxyeOswd

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/2076-1-0x0000000000170000-0x00000000001BC000-memory.dmp	family_chaos
behavioral1/files/0x0004000000004ed7-6.dat	family_chaos
behavioral1/memory/2724-8-0x0000000000D40000-0x0000000000D8C000-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
980	bcdedit.exe
1216	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
1640	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	svchost.exe
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

Executes dropped EXE 1 IoCs

pid	Process
2724	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\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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\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\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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\Windows\Start Menu\Programs\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\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\Public\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3551809350-4263495960-1443967649-1000\desktop.ini	svchost.exe
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\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\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\Public\Desktop\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-1-5-21-3551809350-4263495960-1443967649-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\tmfr61ofz.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
2956	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2328	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2724	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2076	2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe
2076	2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe
2076	2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe
2724	svchost.exe
2724	svchost.exe
2724	svchost.exe
2724	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2076	2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe
Token: SeDebugPrivilege	2724	svchost.exe
Token: SeBackupPrivilege	2896	vssvc.exe
Token: SeRestorePrivilege	2896	vssvc.exe
Token: SeAuditPrivilege	2896	vssvc.exe
Token: SeIncreaseQuotaPrivilege	444	WMIC.exe
Token: SeSecurityPrivilege	444	WMIC.exe
Token: SeTakeOwnershipPrivilege	444	WMIC.exe
Token: SeLoadDriverPrivilege	444	WMIC.exe
Token: SeSystemProfilePrivilege	444	WMIC.exe
Token: SeSystemtimePrivilege	444	WMIC.exe
Token: SeProfSingleProcessPrivilege	444	WMIC.exe
Token: SeIncBasePriorityPrivilege	444	WMIC.exe
Token: SeCreatePagefilePrivilege	444	WMIC.exe
Token: SeBackupPrivilege	444	WMIC.exe
Token: SeRestorePrivilege	444	WMIC.exe
Token: SeShutdownPrivilege	444	WMIC.exe
Token: SeDebugPrivilege	444	WMIC.exe
Token: SeSystemEnvironmentPrivilege	444	WMIC.exe
Token: SeRemoteShutdownPrivilege	444	WMIC.exe
Token: SeUndockPrivilege	444	WMIC.exe
Token: SeManageVolumePrivilege	444	WMIC.exe
Token: 33	444	WMIC.exe
Token: 34	444	WMIC.exe
Token: 35	444	WMIC.exe
Token: SeIncreaseQuotaPrivilege	444	WMIC.exe
Token: SeSecurityPrivilege	444	WMIC.exe
Token: SeTakeOwnershipPrivilege	444	WMIC.exe
Token: SeLoadDriverPrivilege	444	WMIC.exe
Token: SeSystemProfilePrivilege	444	WMIC.exe
Token: SeSystemtimePrivilege	444	WMIC.exe
Token: SeProfSingleProcessPrivilege	444	WMIC.exe
Token: SeIncBasePriorityPrivilege	444	WMIC.exe
Token: SeCreatePagefilePrivilege	444	WMIC.exe
Token: SeBackupPrivilege	444	WMIC.exe
Token: SeRestorePrivilege	444	WMIC.exe
Token: SeShutdownPrivilege	444	WMIC.exe
Token: SeDebugPrivilege	444	WMIC.exe
Token: SeSystemEnvironmentPrivilege	444	WMIC.exe
Token: SeRemoteShutdownPrivilege	444	WMIC.exe
Token: SeUndockPrivilege	444	WMIC.exe
Token: SeManageVolumePrivilege	444	WMIC.exe
Token: 33	444	WMIC.exe
Token: 34	444	WMIC.exe
Token: 35	444	WMIC.exe
Token: SeBackupPrivilege	1288	wbengine.exe
Token: SeRestorePrivilege	1288	wbengine.exe
Token: SeSecurityPrivilege	1288	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2076 wrote to memory of 2724	2076	2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe	31
PID 2076 wrote to memory of 2724	2076	2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe	31
PID 2076 wrote to memory of 2724	2076	2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe	31
PID 2724 wrote to memory of 1636	2724	svchost.exe	33
PID 2724 wrote to memory of 1636	2724	svchost.exe	33
PID 2724 wrote to memory of 1636	2724	svchost.exe	33
PID 1636 wrote to memory of 2956	1636	cmd.exe	35
PID 1636 wrote to memory of 2956	1636	cmd.exe	35
PID 1636 wrote to memory of 2956	1636	cmd.exe	35
PID 1636 wrote to memory of 444	1636	cmd.exe	38
PID 1636 wrote to memory of 444	1636	cmd.exe	38
PID 1636 wrote to memory of 444	1636	cmd.exe	38
PID 2724 wrote to memory of 1076	2724	svchost.exe	40
PID 2724 wrote to memory of 1076	2724	svchost.exe	40
PID 2724 wrote to memory of 1076	2724	svchost.exe	40
PID 1076 wrote to memory of 980	1076	cmd.exe	42
PID 1076 wrote to memory of 980	1076	cmd.exe	42
PID 1076 wrote to memory of 980	1076	cmd.exe	42
PID 1076 wrote to memory of 1216	1076	cmd.exe	43
PID 1076 wrote to memory of 1216	1076	cmd.exe	43
PID 1076 wrote to memory of 1216	1076	cmd.exe	43
PID 2724 wrote to memory of 1308	2724	svchost.exe	44
PID 2724 wrote to memory of 1308	2724	svchost.exe	44
PID 2724 wrote to memory of 1308	2724	svchost.exe	44
PID 1308 wrote to memory of 1640	1308	cmd.exe	46
PID 1308 wrote to memory of 1640	1308	cmd.exe	46
PID 1308 wrote to memory of 1640	1308	cmd.exe	46
PID 2724 wrote to memory of 2328	2724	svchost.exe	50
PID 2724 wrote to memory of 2328	2724	svchost.exe	50
PID 2724 wrote to memory of 2328	2724	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\2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-08-07_9b838a440786b24df80da0637dff3ba0_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2076
- 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:2724
- - 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:1636
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2956
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:444
- - 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:1076
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:980
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1216
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1308
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1640
- - 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:2328

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2896

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1288

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1688

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:904

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
279KB

MD5
9b838a440786b24df80da0637dff3ba0

SHA1
23ccd406239bdd950639cdd2a4382c602fa55aeb

SHA256
6783ca1fa4ed35e2a48464fbe3c6e9c09c7165e6d3802c8cc395889e4726c389

SHA512
ed8f0013bdd3cb09478bc07ad29827d556578168a6fffd1d0b23005e9fe29ba1364496bf3236e056fb8f623851165ee3945a8675b735527a2c7600599457639b

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

Filesize
584B

MD5
a763f99b18db69fad94137a282f8e61d

SHA1
3c950c3cfdd4cf689f7c909a0d0261441d866a28

SHA256
de46707c10536a6530e938f6cf9fbfa534449b0662185974f7fca0939b6ae912

SHA512
c2f7f5da1816483d248b5f820e6abab407111663b39807a591d4b5b0e920b02d577cbf810428f7f47c21c1a8233788ec5a8e76ac913a087a8d7d2787e1bed6d7

Download Submit
memory/2076-0-0x000007FEF50F3000-0x000007FEF50F4000-memory.dmp

Filesize
4KB

Download
memory/2076-1-0x0000000000170000-0x00000000001BC000-memory.dmp

Filesize
304KB

Download
memory/2076-2-0x000007FEF50F3000-0x000007FEF50F4000-memory.dmp

Filesize
4KB

Download
memory/2724-8-0x0000000000D40000-0x0000000000D8C000-memory.dmp

Filesize
304KB

Download
memory/2724-26-0x000007FEF50F0000-0x000007FEF5ADC000-memory.dmp

Filesize
9.9MB

Download
memory/2724-37-0x000007FEF50F0000-0x000007FEF5ADC000-memory.dmp

Filesize
9.9MB

Download
memory/2724-500-0x000007FEF50F0000-0x000007FEF5ADC000-memory.dmp

Filesize
9.9MB

Download