chaos | e32188f9dfa8b7d36a95edc45a56b39311fefd1df28af00a7e56b42e00557321

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
18-04-2024 07:49

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General

Target

2024-04-18_8f2fc5dfe5bad0015842dbe92da023df_wannacry.exe
Size

128KB
MD5

8f2fc5dfe5bad0015842dbe92da023df
SHA1

67bc07193daa7d1682440657be9019f456a6ae6a
SHA256

e32188f9dfa8b7d36a95edc45a56b39311fefd1df28af00a7e56b42e00557321
SHA512

425de873f2cc95097ba7017b54a59905e2fc0af90a2d87f8e2ce04085350ae87e8223486ccaa6d50aba5e46a9085bda38b3099761d9f4d8869c6af4bad6b1b9c
SSDEEP

3072:voTyX1r9maVrm4vCiipjEC7AXRTZfkTF8qmRHXHC56POTLe:Blr9maHajEQYRV4FkXHvG3

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/1096-0-0x00000000000B0000-0x00000000000D6000-memory.dmp	family_chaos
behavioral1/files/0x000b000000012256-5.dat	family_chaos
behavioral1/memory/1760-7-0x0000000000D80000-0x0000000000DA6000-memory.dmp	family_chaos
behavioral1/memory/1760-11-0x000000001AEE0000-0x000000001AF60000-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/1096-0-0x00000000000B0000-0x00000000000D6000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000b000000012256-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/1760-7-0x0000000000D80000-0x0000000000DA6000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/1760-11-0x000000001AEE0000-0x000000001AF60000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1508	bcdedit.exe
1504	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
2968	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
1760	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\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\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\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\Public\Pictures\Sample 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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Searches\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\Documents\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1298544033-3225604241-2703760938-1000\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\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\Public\Desktop\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\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\Documents\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\Start Menu\Programs\Maintenance\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

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\v0df7e5yi.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
2932	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
560	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1760	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1096	2024-04-18_8f2fc5dfe5bad0015842dbe92da023df_wannacry.exe
1096	2024-04-18_8f2fc5dfe5bad0015842dbe92da023df_wannacry.exe
1760	svchost.exe
1760	svchost.exe
1760	svchost.exe
1760	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1096	2024-04-18_8f2fc5dfe5bad0015842dbe92da023df_wannacry.exe
Token: SeDebugPrivilege	1760	svchost.exe
Token: SeBackupPrivilege	1956	vssvc.exe
Token: SeRestorePrivilege	1956	vssvc.exe
Token: SeAuditPrivilege	1956	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2320	WMIC.exe
Token: SeSecurityPrivilege	2320	WMIC.exe
Token: SeTakeOwnershipPrivilege	2320	WMIC.exe
Token: SeLoadDriverPrivilege	2320	WMIC.exe
Token: SeSystemProfilePrivilege	2320	WMIC.exe
Token: SeSystemtimePrivilege	2320	WMIC.exe
Token: SeProfSingleProcessPrivilege	2320	WMIC.exe
Token: SeIncBasePriorityPrivilege	2320	WMIC.exe
Token: SeCreatePagefilePrivilege	2320	WMIC.exe
Token: SeBackupPrivilege	2320	WMIC.exe
Token: SeRestorePrivilege	2320	WMIC.exe
Token: SeShutdownPrivilege	2320	WMIC.exe
Token: SeDebugPrivilege	2320	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2320	WMIC.exe
Token: SeRemoteShutdownPrivilege	2320	WMIC.exe
Token: SeUndockPrivilege	2320	WMIC.exe
Token: SeManageVolumePrivilege	2320	WMIC.exe
Token: 33	2320	WMIC.exe
Token: 34	2320	WMIC.exe
Token: 35	2320	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2320	WMIC.exe
Token: SeSecurityPrivilege	2320	WMIC.exe
Token: SeTakeOwnershipPrivilege	2320	WMIC.exe
Token: SeLoadDriverPrivilege	2320	WMIC.exe
Token: SeSystemProfilePrivilege	2320	WMIC.exe
Token: SeSystemtimePrivilege	2320	WMIC.exe
Token: SeProfSingleProcessPrivilege	2320	WMIC.exe
Token: SeIncBasePriorityPrivilege	2320	WMIC.exe
Token: SeCreatePagefilePrivilege	2320	WMIC.exe
Token: SeBackupPrivilege	2320	WMIC.exe
Token: SeRestorePrivilege	2320	WMIC.exe
Token: SeShutdownPrivilege	2320	WMIC.exe
Token: SeDebugPrivilege	2320	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2320	WMIC.exe
Token: SeRemoteShutdownPrivilege	2320	WMIC.exe
Token: SeUndockPrivilege	2320	WMIC.exe
Token: SeManageVolumePrivilege	2320	WMIC.exe
Token: 33	2320	WMIC.exe
Token: 34	2320	WMIC.exe
Token: 35	2320	WMIC.exe
Token: SeBackupPrivilege	3032	wbengine.exe
Token: SeRestorePrivilege	3032	wbengine.exe
Token: SeSecurityPrivilege	3032	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1096 wrote to memory of 1760	1096	2024-04-18_8f2fc5dfe5bad0015842dbe92da023df_wannacry.exe	28
PID 1096 wrote to memory of 1760	1096	2024-04-18_8f2fc5dfe5bad0015842dbe92da023df_wannacry.exe	28
PID 1096 wrote to memory of 1760	1096	2024-04-18_8f2fc5dfe5bad0015842dbe92da023df_wannacry.exe	28
PID 1760 wrote to memory of 2920	1760	svchost.exe	30
PID 1760 wrote to memory of 2920	1760	svchost.exe	30
PID 1760 wrote to memory of 2920	1760	svchost.exe	30
PID 2920 wrote to memory of 2932	2920	cmd.exe	32
PID 2920 wrote to memory of 2932	2920	cmd.exe	32
PID 2920 wrote to memory of 2932	2920	cmd.exe	32
PID 2920 wrote to memory of 2320	2920	cmd.exe	35
PID 2920 wrote to memory of 2320	2920	cmd.exe	35
PID 2920 wrote to memory of 2320	2920	cmd.exe	35
PID 1760 wrote to memory of 336	1760	svchost.exe	37
PID 1760 wrote to memory of 336	1760	svchost.exe	37
PID 1760 wrote to memory of 336	1760	svchost.exe	37
PID 336 wrote to memory of 1508	336	cmd.exe	39
PID 336 wrote to memory of 1508	336	cmd.exe	39
PID 336 wrote to memory of 1508	336	cmd.exe	39
PID 336 wrote to memory of 1504	336	cmd.exe	40
PID 336 wrote to memory of 1504	336	cmd.exe	40
PID 336 wrote to memory of 1504	336	cmd.exe	40
PID 1760 wrote to memory of 1528	1760	svchost.exe	41
PID 1760 wrote to memory of 1528	1760	svchost.exe	41
PID 1760 wrote to memory of 1528	1760	svchost.exe	41
PID 1528 wrote to memory of 2968	1528	cmd.exe	43
PID 1528 wrote to memory of 2968	1528	cmd.exe	43
PID 1528 wrote to memory of 2968	1528	cmd.exe	43
PID 1760 wrote to memory of 560	1760	svchost.exe	47
PID 1760 wrote to memory of 560	1760	svchost.exe	47
PID 1760 wrote to memory of 560	1760	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\2024-04-18_8f2fc5dfe5bad0015842dbe92da023df_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-18_8f2fc5dfe5bad0015842dbe92da023df_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1096
- 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:1760
- - 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:2920
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2932
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2320
- - 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:336
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1508
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1504
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1528
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2968
- - 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:560

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1956

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3032

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2796

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1040

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
128KB

MD5
8f2fc5dfe5bad0015842dbe92da023df

SHA1
67bc07193daa7d1682440657be9019f456a6ae6a

SHA256
e32188f9dfa8b7d36a95edc45a56b39311fefd1df28af00a7e56b42e00557321

SHA512
425de873f2cc95097ba7017b54a59905e2fc0af90a2d87f8e2ce04085350ae87e8223486ccaa6d50aba5e46a9085bda38b3099761d9f4d8869c6af4bad6b1b9c

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

Filesize
1KB

MD5
8c7d99ea76ba151e9ddf1c4ae4bdfa04

SHA1
20b97e322862e5b64fb018802b8029dec6882dae

SHA256
5331b4dd9deb58667f8359eca271dd0da984d77dd6060adaa27c6a9f825bd118

SHA512
bc25e540fc69525fbf8899d583b9e5642c4e4b8346adc24db59868ff4c1e47684981b37c6ec48a9a793a9194c12c407fb58346e552ad92403c948f33ba853eef

Download Submit
memory/1096-0-0x00000000000B0000-0x00000000000D6000-memory.dmp

Filesize
152KB

Download
memory/1096-1-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/1096-8-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/1760-7-0x0000000000D80000-0x0000000000DA6000-memory.dmp

Filesize
152KB

Download
memory/1760-9-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/1760-11-0x000000001AEE0000-0x000000001AF60000-memory.dmp

Filesize
512KB

Download
memory/1760-443-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/1760-444-0x000000001AEE0000-0x000000001AF60000-memory.dmp

Filesize
512KB

Download