chaos | 24266d8af5e54a179ca62fe8ba586a9bced5e39565ad05f33583a3fc8f509613

Resubmissions

31/03/2024, 09:16

240331-k8y2eahd2s 10

31/03/2024, 09:07

240331-k3d42shh42 10

20/03/2024, 19:30

240320-x7y18shg5v 10

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
20/03/2024, 19:30

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-20_1b2fdf47aaaccaf622e33cb4dd63e8e2_wannacry.exe
Size

372KB
MD5

1b2fdf47aaaccaf622e33cb4dd63e8e2
SHA1

1130c9d40bc5ab004918a509811f914605594961
SHA256

24266d8af5e54a179ca62fe8ba586a9bced5e39565ad05f33583a3fc8f509613
SHA512

f494e23997ba85df3fcdaaaeb1d6c056de6f7b6a22ecf8df4797b302016deafea0d2030058680baa521cae93cf5921b3bd58d1750274819f866a868beff2739c
SSDEEP

3072:doeNsCr9h4ca2aHBSCAb2+IPdG1UlcaVSptR4jiYFD:nNr9h4ca7SCdI12cTtRcf

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 4 IoCs

resource	yara_rule
behavioral1/memory/2240-0-0x00000000003A0000-0x0000000000402000-memory.dmp	family_chaos
behavioral1/files/0x0009000000012245-5.dat	family_chaos
behavioral1/memory/1956-7-0x00000000012B0000-0x0000000001312000-memory.dmp	family_chaos
behavioral1/memory/1956-11-0x0000000000AF0000-0x0000000000B70000-memory.dmp	family_chaos

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Detects command variations typically used by ransomware 4 IoCs

resource	yara_rule
behavioral1/memory/2240-0-0x00000000003A0000-0x0000000000402000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x0009000000012245-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/1956-7-0x00000000012B0000-0x0000000001312000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/1956-11-0x0000000000AF0000-0x0000000000B70000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1848	bcdedit.exe
3060	bcdedit.exe

Renames multiple (199) 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
2264	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\meleaicara.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1956	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\Favorites\Links\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\Saved Games\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\Admin\Videos\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3787592910-3720486031-2929222812-1000\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\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\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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 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
File opened for modification	C:\Users\Admin\Contacts\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\Public\Pictures\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\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\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\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\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\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-1-5-21-3787592910-3720486031-2929222812-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\px0ifv6cz.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 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
2736	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2040	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1956	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2240	2024-03-20_1b2fdf47aaaccaf622e33cb4dd63e8e2_wannacry.exe
2240	2024-03-20_1b2fdf47aaaccaf622e33cb4dd63e8e2_wannacry.exe
1956	svchost.exe
1956	svchost.exe
1956	svchost.exe
1956	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2240	2024-03-20_1b2fdf47aaaccaf622e33cb4dd63e8e2_wannacry.exe
Token: SeDebugPrivilege	1956	svchost.exe
Token: SeBackupPrivilege	2644	vssvc.exe
Token: SeRestorePrivilege	2644	vssvc.exe
Token: SeAuditPrivilege	2644	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1080	WMIC.exe
Token: SeSecurityPrivilege	1080	WMIC.exe
Token: SeTakeOwnershipPrivilege	1080	WMIC.exe
Token: SeLoadDriverPrivilege	1080	WMIC.exe
Token: SeSystemProfilePrivilege	1080	WMIC.exe
Token: SeSystemtimePrivilege	1080	WMIC.exe
Token: SeProfSingleProcessPrivilege	1080	WMIC.exe
Token: SeIncBasePriorityPrivilege	1080	WMIC.exe
Token: SeCreatePagefilePrivilege	1080	WMIC.exe
Token: SeBackupPrivilege	1080	WMIC.exe
Token: SeRestorePrivilege	1080	WMIC.exe
Token: SeShutdownPrivilege	1080	WMIC.exe
Token: SeDebugPrivilege	1080	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1080	WMIC.exe
Token: SeRemoteShutdownPrivilege	1080	WMIC.exe
Token: SeUndockPrivilege	1080	WMIC.exe
Token: SeManageVolumePrivilege	1080	WMIC.exe
Token: 33	1080	WMIC.exe
Token: 34	1080	WMIC.exe
Token: 35	1080	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1080	WMIC.exe
Token: SeSecurityPrivilege	1080	WMIC.exe
Token: SeTakeOwnershipPrivilege	1080	WMIC.exe
Token: SeLoadDriverPrivilege	1080	WMIC.exe
Token: SeSystemProfilePrivilege	1080	WMIC.exe
Token: SeSystemtimePrivilege	1080	WMIC.exe
Token: SeProfSingleProcessPrivilege	1080	WMIC.exe
Token: SeIncBasePriorityPrivilege	1080	WMIC.exe
Token: SeCreatePagefilePrivilege	1080	WMIC.exe
Token: SeBackupPrivilege	1080	WMIC.exe
Token: SeRestorePrivilege	1080	WMIC.exe
Token: SeShutdownPrivilege	1080	WMIC.exe
Token: SeDebugPrivilege	1080	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1080	WMIC.exe
Token: SeRemoteShutdownPrivilege	1080	WMIC.exe
Token: SeUndockPrivilege	1080	WMIC.exe
Token: SeManageVolumePrivilege	1080	WMIC.exe
Token: 33	1080	WMIC.exe
Token: 34	1080	WMIC.exe
Token: 35	1080	WMIC.exe
Token: SeBackupPrivilege	2716	wbengine.exe
Token: SeRestorePrivilege	2716	wbengine.exe
Token: SeSecurityPrivilege	2716	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 1956	2240	2024-03-20_1b2fdf47aaaccaf622e33cb4dd63e8e2_wannacry.exe	28
PID 2240 wrote to memory of 1956	2240	2024-03-20_1b2fdf47aaaccaf622e33cb4dd63e8e2_wannacry.exe	28
PID 2240 wrote to memory of 1956	2240	2024-03-20_1b2fdf47aaaccaf622e33cb4dd63e8e2_wannacry.exe	28
PID 1956 wrote to memory of 2500	1956	svchost.exe	30
PID 1956 wrote to memory of 2500	1956	svchost.exe	30
PID 1956 wrote to memory of 2500	1956	svchost.exe	30
PID 2500 wrote to memory of 2736	2500	cmd.exe	32
PID 2500 wrote to memory of 2736	2500	cmd.exe	32
PID 2500 wrote to memory of 2736	2500	cmd.exe	32
PID 2500 wrote to memory of 1080	2500	cmd.exe	36
PID 2500 wrote to memory of 1080	2500	cmd.exe	36
PID 2500 wrote to memory of 1080	2500	cmd.exe	36
PID 1956 wrote to memory of 1780	1956	svchost.exe	38
PID 1956 wrote to memory of 1780	1956	svchost.exe	38
PID 1956 wrote to memory of 1780	1956	svchost.exe	38
PID 1780 wrote to memory of 1848	1780	cmd.exe	40
PID 1780 wrote to memory of 1848	1780	cmd.exe	40
PID 1780 wrote to memory of 1848	1780	cmd.exe	40
PID 1780 wrote to memory of 3060	1780	cmd.exe	41
PID 1780 wrote to memory of 3060	1780	cmd.exe	41
PID 1780 wrote to memory of 3060	1780	cmd.exe	41
PID 1956 wrote to memory of 2812	1956	svchost.exe	42
PID 1956 wrote to memory of 2812	1956	svchost.exe	42
PID 1956 wrote to memory of 2812	1956	svchost.exe	42
PID 2812 wrote to memory of 2264	2812	cmd.exe	44
PID 2812 wrote to memory of 2264	2812	cmd.exe	44
PID 2812 wrote to memory of 2264	2812	cmd.exe	44
PID 1956 wrote to memory of 2040	1956	svchost.exe	50
PID 1956 wrote to memory of 2040	1956	svchost.exe	50
PID 1956 wrote to memory of 2040	1956	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\2024-03-20_1b2fdf47aaaccaf622e33cb4dd63e8e2_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-20_1b2fdf47aaaccaf622e33cb4dd63e8e2_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2240
- 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:1956
- - 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:2500
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2736
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1080
- - 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:1780
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1848
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:3060
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2812
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2264
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\meleaicara.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:2040

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2644

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2716

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1984

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1084

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

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\svchost.exe

Filesize
372KB

MD5
1b2fdf47aaaccaf622e33cb4dd63e8e2

SHA1
1130c9d40bc5ab004918a509811f914605594961

SHA256
24266d8af5e54a179ca62fe8ba586a9bced5e39565ad05f33583a3fc8f509613

SHA512
f494e23997ba85df3fcdaaaeb1d6c056de6f7b6a22ecf8df4797b302016deafea0d2030058680baa521cae93cf5921b3bd58d1750274819f866a868beff2739c

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

Filesize
337B

MD5
2453eac3dfe17fe5b3e88b03f449d805

SHA1
24c16cbbf4f2b8ea43d1cbea09a51eaa2c0d6b13

SHA256
2464de8fc12e32477f09621b90d707ab9fcca3b9d8b1b1caf367f5496021091f

SHA512
d5750b142533e1fab2deaae7563edb7da723ef69cc93f91c1e91659da92167d9f9d0b34a7ed828761563068a510857f62d893c0028cc826f3252fc993c420a0a

Download Submit
memory/1956-7-0x00000000012B0000-0x0000000001312000-memory.dmp

Filesize
392KB

Download
memory/1956-9-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp

Filesize
9.9MB

Download
memory/1956-11-0x0000000000AF0000-0x0000000000B70000-memory.dmp

Filesize
512KB

Download
memory/1956-458-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp

Filesize
9.9MB

Download
memory/2240-0-0x00000000003A0000-0x0000000000402000-memory.dmp

Filesize
392KB

Download
memory/2240-1-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp

Filesize
9.9MB

Download
memory/2240-8-0x000007FEF5700000-0x000007FEF60EC000-memory.dmp

Filesize
9.9MB

Download