chaos | d047a3d556af2717969da799b991f255b7a282b4a0c7d4df30adf34a4cadc37a

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02-10-2024 10:17

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General

Target

2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
Size

232KB
MD5

52285212e0d83a23f0bc321e9553ddf2
SHA1

d7b61c3c7e5b7f148029b1ce75e2eb4f01125e44
SHA256

d047a3d556af2717969da799b991f255b7a282b4a0c7d4df30adf34a4cadc37a
SHA512

d171a821e9fe042a36d07fee47ffb575d88c0a4d44baee39c59d6e18371275598b4b5fb2195899878e9dc8975355e687b47d82f2237c1d2b14b781ad67adf86b
SSDEEP

3072:PoxUHr9UA6iSob4L1bbc+fG1Q0WE1T0QgsC759L0TQQun43Nf:fr9UA6iS7LRVGqIT0XR75903Nf

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/2172-1-0x00000000010D0000-0x0000000001110000-memory.dmp	family_chaos
behavioral1/files/0x0007000000012117-5.dat	family_chaos
behavioral1/memory/2792-7-0x0000000001390000-0x00000000013D0000-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
820	bcdedit.exe
2496	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
1848	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url	svchost.exe
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

Executes dropped EXE 1 IoCs

pid	Process
2792	svchost.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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	F:\$RECYCLE.BIN\S-1-5-21-3290804112-2823094203-3137964600-1000\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	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\SendTo\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\Public\Music\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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-1-5-21-3290804112-2823094203-3137964600-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\hk9ank41s.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
2648	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1744	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2792	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2172	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
2172	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
2172	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
2792	svchost.exe
2792	svchost.exe
2792	svchost.exe
2792	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2172	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
Token: SeDebugPrivilege	2792	svchost.exe
Token: SeBackupPrivilege	1988	vssvc.exe
Token: SeRestorePrivilege	1988	vssvc.exe
Token: SeAuditPrivilege	1988	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2228	WMIC.exe
Token: SeSecurityPrivilege	2228	WMIC.exe
Token: SeTakeOwnershipPrivilege	2228	WMIC.exe
Token: SeLoadDriverPrivilege	2228	WMIC.exe
Token: SeSystemProfilePrivilege	2228	WMIC.exe
Token: SeSystemtimePrivilege	2228	WMIC.exe
Token: SeProfSingleProcessPrivilege	2228	WMIC.exe
Token: SeIncBasePriorityPrivilege	2228	WMIC.exe
Token: SeCreatePagefilePrivilege	2228	WMIC.exe
Token: SeBackupPrivilege	2228	WMIC.exe
Token: SeRestorePrivilege	2228	WMIC.exe
Token: SeShutdownPrivilege	2228	WMIC.exe
Token: SeDebugPrivilege	2228	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2228	WMIC.exe
Token: SeRemoteShutdownPrivilege	2228	WMIC.exe
Token: SeUndockPrivilege	2228	WMIC.exe
Token: SeManageVolumePrivilege	2228	WMIC.exe
Token: 33	2228	WMIC.exe
Token: 34	2228	WMIC.exe
Token: 35	2228	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2228	WMIC.exe
Token: SeSecurityPrivilege	2228	WMIC.exe
Token: SeTakeOwnershipPrivilege	2228	WMIC.exe
Token: SeLoadDriverPrivilege	2228	WMIC.exe
Token: SeSystemProfilePrivilege	2228	WMIC.exe
Token: SeSystemtimePrivilege	2228	WMIC.exe
Token: SeProfSingleProcessPrivilege	2228	WMIC.exe
Token: SeIncBasePriorityPrivilege	2228	WMIC.exe
Token: SeCreatePagefilePrivilege	2228	WMIC.exe
Token: SeBackupPrivilege	2228	WMIC.exe
Token: SeRestorePrivilege	2228	WMIC.exe
Token: SeShutdownPrivilege	2228	WMIC.exe
Token: SeDebugPrivilege	2228	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2228	WMIC.exe
Token: SeRemoteShutdownPrivilege	2228	WMIC.exe
Token: SeUndockPrivilege	2228	WMIC.exe
Token: SeManageVolumePrivilege	2228	WMIC.exe
Token: 33	2228	WMIC.exe
Token: 34	2228	WMIC.exe
Token: 35	2228	WMIC.exe
Token: SeBackupPrivilege	1048	wbengine.exe
Token: SeRestorePrivilege	1048	wbengine.exe
Token: SeSecurityPrivilege	1048	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 2792	2172	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe	31
PID 2172 wrote to memory of 2792	2172	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe	31
PID 2172 wrote to memory of 2792	2172	2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe	31
PID 2792 wrote to memory of 1356	2792	svchost.exe	33
PID 2792 wrote to memory of 1356	2792	svchost.exe	33
PID 2792 wrote to memory of 1356	2792	svchost.exe	33
PID 1356 wrote to memory of 2648	1356	cmd.exe	35
PID 1356 wrote to memory of 2648	1356	cmd.exe	35
PID 1356 wrote to memory of 2648	1356	cmd.exe	35
PID 1356 wrote to memory of 2228	1356	cmd.exe	38
PID 1356 wrote to memory of 2228	1356	cmd.exe	38
PID 1356 wrote to memory of 2228	1356	cmd.exe	38
PID 2792 wrote to memory of 2500	2792	svchost.exe	40
PID 2792 wrote to memory of 2500	2792	svchost.exe	40
PID 2792 wrote to memory of 2500	2792	svchost.exe	40
PID 2500 wrote to memory of 820	2500	cmd.exe	42
PID 2500 wrote to memory of 820	2500	cmd.exe	42
PID 2500 wrote to memory of 820	2500	cmd.exe	42
PID 2500 wrote to memory of 2496	2500	cmd.exe	43
PID 2500 wrote to memory of 2496	2500	cmd.exe	43
PID 2500 wrote to memory of 2496	2500	cmd.exe	43
PID 2792 wrote to memory of 280	2792	svchost.exe	44
PID 2792 wrote to memory of 280	2792	svchost.exe	44
PID 2792 wrote to memory of 280	2792	svchost.exe	44
PID 280 wrote to memory of 1848	280	cmd.exe	46
PID 280 wrote to memory of 1848	280	cmd.exe	46
PID 280 wrote to memory of 1848	280	cmd.exe	46
PID 2792 wrote to memory of 1744	2792	svchost.exe	50
PID 2792 wrote to memory of 1744	2792	svchost.exe	50
PID 2792 wrote to memory of 1744	2792	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\2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024100252285212e0d83a23f0bc321e9553ddf2wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2172
- 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:2792
- - 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:1356
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2648
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2228
- - 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:2500
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:820
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2496
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:280
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1848
- - 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:1744

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1988

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1048

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1936

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2512

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

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
232KB

MD5
52285212e0d83a23f0bc321e9553ddf2

SHA1
d7b61c3c7e5b7f148029b1ce75e2eb4f01125e44

SHA256
d047a3d556af2717969da799b991f255b7a282b4a0c7d4df30adf34a4cadc37a

SHA512
d171a821e9fe042a36d07fee47ffb575d88c0a4d44baee39c59d6e18371275598b4b5fb2195899878e9dc8975355e687b47d82f2237c1d2b14b781ad67adf86b

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

Filesize
60B

MD5
4d40f632748d11307b30b0599dbc156f

SHA1
8111b6566282c3f409e45542702fbd5725037a01

SHA256
87e8f9aff80e5f5d886118a79cd793af9b7875206dc2f99e1f6811037fe258e6

SHA512
46d53bc149807fd8a63f1a2fd6e8377f2079bbafe9fb244e635d9902975b77b07871354b6fb19f2187c0549cfcd0f030b053612b8231ebf4a65bd86bae747f37

Download Submit
memory/2172-0-0x000007FEF5753000-0x000007FEF5754000-memory.dmp

Filesize
4KB

Download
memory/2172-1-0x00000000010D0000-0x0000000001110000-memory.dmp

Filesize
256KB

Download
memory/2792-7-0x0000000001390000-0x00000000013D0000-memory.dmp

Filesize
256KB

Download
memory/2792-27-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

Filesize
9.9MB

Download
memory/2792-34-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

Filesize
9.9MB

Download
memory/2792-490-0x000007FEF5750000-0x000007FEF613C000-memory.dmp

Filesize
9.9MB

Download