chaos | b7e12bf54356d831e3d7b5e10b0c1782a3e2feb29dd6ed3857c3922d2b48c7c1

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
23/04/2024, 04:30

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General

Target

2024-04-23_3736a823e68e0624d6a97e26404912c9_wannacry.exe
Size

330KB
MD5

3736a823e68e0624d6a97e26404912c9
SHA1

3dc5eac263f2a10eefe1f4d16932623aabdcecc3
SHA256

b7e12bf54356d831e3d7b5e10b0c1782a3e2feb29dd6ed3857c3922d2b48c7c1
SHA512

902955e4c95a5d8840b0ced7cfb4838b59a75f5a87ec694d426c01476c3f64974039d4f6310464777adc78d433a0dd455092db0a8d27381146351be931143cfb
SSDEEP

6144:GB4Rr95aqSX2mLCHpdgwNNMLv6Cwm33BL5uK8v:GB4ARX2mLCJdgwNNWg8BLAK8v

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/2884-0-0x0000000000C20000-0x0000000000C78000-memory.dmp	family_chaos
behavioral1/files/0x00090000000146c0-5.dat	family_chaos
behavioral1/memory/2964-7-0x0000000001060000-0x00000000010B8000-memory.dmp	family_chaos
behavioral1/memory/2964-432-0x000000001A900000-0x000000001A980000-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/2884-0-0x0000000000C20000-0x0000000000C78000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x00090000000146c0-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2964-7-0x0000000001060000-0x00000000010B8000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2964-432-0x000000001A900000-0x000000001A980000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1696	bcdedit.exe
1756	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
1632	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\Message.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2964	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\AppData\Roaming\Microsoft\Windows\SendTo\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\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\Libraries\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\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Internet Explorer\Quick Launch\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Links\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\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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\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\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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	F:\$RECYCLE.BIN\S-1-5-21-3627615824-4061627003-3019543961-1000\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-1-5-21-3627615824-4061627003-3019543961-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\j2x2bst1k.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
2396	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
572	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2964	svchost.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2884	2024-04-23_3736a823e68e0624d6a97e26404912c9_wannacry.exe
2884	2024-04-23_3736a823e68e0624d6a97e26404912c9_wannacry.exe
2964	svchost.exe
2964	svchost.exe
2964	svchost.exe
2964	svchost.exe
2964	svchost.exe
2964	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2884	2024-04-23_3736a823e68e0624d6a97e26404912c9_wannacry.exe
Token: SeDebugPrivilege	2964	svchost.exe
Token: SeBackupPrivilege	2924	vssvc.exe
Token: SeRestorePrivilege	2924	vssvc.exe
Token: SeAuditPrivilege	2924	vssvc.exe
Token: SeIncreaseQuotaPrivilege	940	WMIC.exe
Token: SeSecurityPrivilege	940	WMIC.exe
Token: SeTakeOwnershipPrivilege	940	WMIC.exe
Token: SeLoadDriverPrivilege	940	WMIC.exe
Token: SeSystemProfilePrivilege	940	WMIC.exe
Token: SeSystemtimePrivilege	940	WMIC.exe
Token: SeProfSingleProcessPrivilege	940	WMIC.exe
Token: SeIncBasePriorityPrivilege	940	WMIC.exe
Token: SeCreatePagefilePrivilege	940	WMIC.exe
Token: SeBackupPrivilege	940	WMIC.exe
Token: SeRestorePrivilege	940	WMIC.exe
Token: SeShutdownPrivilege	940	WMIC.exe
Token: SeDebugPrivilege	940	WMIC.exe
Token: SeSystemEnvironmentPrivilege	940	WMIC.exe
Token: SeRemoteShutdownPrivilege	940	WMIC.exe
Token: SeUndockPrivilege	940	WMIC.exe
Token: SeManageVolumePrivilege	940	WMIC.exe
Token: 33	940	WMIC.exe
Token: 34	940	WMIC.exe
Token: 35	940	WMIC.exe
Token: SeIncreaseQuotaPrivilege	940	WMIC.exe
Token: SeSecurityPrivilege	940	WMIC.exe
Token: SeTakeOwnershipPrivilege	940	WMIC.exe
Token: SeLoadDriverPrivilege	940	WMIC.exe
Token: SeSystemProfilePrivilege	940	WMIC.exe
Token: SeSystemtimePrivilege	940	WMIC.exe
Token: SeProfSingleProcessPrivilege	940	WMIC.exe
Token: SeIncBasePriorityPrivilege	940	WMIC.exe
Token: SeCreatePagefilePrivilege	940	WMIC.exe
Token: SeBackupPrivilege	940	WMIC.exe
Token: SeRestorePrivilege	940	WMIC.exe
Token: SeShutdownPrivilege	940	WMIC.exe
Token: SeDebugPrivilege	940	WMIC.exe
Token: SeSystemEnvironmentPrivilege	940	WMIC.exe
Token: SeRemoteShutdownPrivilege	940	WMIC.exe
Token: SeUndockPrivilege	940	WMIC.exe
Token: SeManageVolumePrivilege	940	WMIC.exe
Token: 33	940	WMIC.exe
Token: 34	940	WMIC.exe
Token: 35	940	WMIC.exe
Token: SeBackupPrivilege	1216	wbengine.exe
Token: SeRestorePrivilege	1216	wbengine.exe
Token: SeSecurityPrivilege	1216	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2884 wrote to memory of 2964	2884	2024-04-23_3736a823e68e0624d6a97e26404912c9_wannacry.exe	28
PID 2884 wrote to memory of 2964	2884	2024-04-23_3736a823e68e0624d6a97e26404912c9_wannacry.exe	28
PID 2884 wrote to memory of 2964	2884	2024-04-23_3736a823e68e0624d6a97e26404912c9_wannacry.exe	28
PID 2964 wrote to memory of 2504	2964	svchost.exe	30
PID 2964 wrote to memory of 2504	2964	svchost.exe	30
PID 2964 wrote to memory of 2504	2964	svchost.exe	30
PID 2504 wrote to memory of 2396	2504	cmd.exe	32
PID 2504 wrote to memory of 2396	2504	cmd.exe	32
PID 2504 wrote to memory of 2396	2504	cmd.exe	32
PID 2504 wrote to memory of 940	2504	cmd.exe	35
PID 2504 wrote to memory of 940	2504	cmd.exe	35
PID 2504 wrote to memory of 940	2504	cmd.exe	35
PID 2964 wrote to memory of 1776	2964	svchost.exe	37
PID 2964 wrote to memory of 1776	2964	svchost.exe	37
PID 2964 wrote to memory of 1776	2964	svchost.exe	37
PID 1776 wrote to memory of 1696	1776	cmd.exe	39
PID 1776 wrote to memory of 1696	1776	cmd.exe	39
PID 1776 wrote to memory of 1696	1776	cmd.exe	39
PID 1776 wrote to memory of 1756	1776	cmd.exe	40
PID 1776 wrote to memory of 1756	1776	cmd.exe	40
PID 1776 wrote to memory of 1756	1776	cmd.exe	40
PID 2964 wrote to memory of 1712	2964	svchost.exe	41
PID 2964 wrote to memory of 1712	2964	svchost.exe	41
PID 2964 wrote to memory of 1712	2964	svchost.exe	41
PID 1712 wrote to memory of 1632	1712	cmd.exe	43
PID 1712 wrote to memory of 1632	1712	cmd.exe	43
PID 1712 wrote to memory of 1632	1712	cmd.exe	43
PID 2964 wrote to memory of 572	2964	svchost.exe	47
PID 2964 wrote to memory of 572	2964	svchost.exe	47
PID 2964 wrote to memory of 572	2964	svchost.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\2024-04-23_3736a823e68e0624d6a97e26404912c9_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-23_3736a823e68e0624d6a97e26404912c9_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2884
- 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:2964
- - 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:2504
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2396
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:940
- - 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:1776
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1696
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1756
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1712
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1632
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Message.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:572

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2924

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1216

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2240

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:536

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

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Downloads

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

Filesize
330KB

MD5
3736a823e68e0624d6a97e26404912c9

SHA1
3dc5eac263f2a10eefe1f4d16932623aabdcecc3

SHA256
b7e12bf54356d831e3d7b5e10b0c1782a3e2feb29dd6ed3857c3922d2b48c7c1

SHA512
902955e4c95a5d8840b0ced7cfb4838b59a75f5a87ec694d426c01476c3f64974039d4f6310464777adc78d433a0dd455092db0a8d27381146351be931143cfb

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

Filesize
740B

MD5
b8b46623ec2a4663bfa674b882ebccb6

SHA1
108262bba5d25b970796e50c6c25c652ba8d8b59

SHA256
41764b00cbe89f3a57b8124cf2ce510fcb19ec6c82c40483094da027b3ef660b

SHA512
0b7727e6285dc4b4b625ef072eff93a2a9b283ec0a4e5dcdf1e465522b50fecfc1e0f3da9983ea3cd9c8372463e174526cdad263890dcd551badc2257018fea6

Download Submit
memory/2884-0-0x0000000000C20000-0x0000000000C78000-memory.dmp

Filesize
352KB

Download
memory/2884-1-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2884-8-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2964-7-0x0000000001060000-0x00000000010B8000-memory.dmp

Filesize
352KB

Download
memory/2964-9-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2964-11-0x000000001A900000-0x000000001A980000-memory.dmp

Filesize
512KB

Download
memory/2964-431-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2964-432-0x000000001A900000-0x000000001A980000-memory.dmp

Filesize
512KB

Download