chaos | d487a3562cfb46a5992deac8a154f6b84b4b046fb98252e51b9c75310a8e4610

Analysis

max time kernel
120s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
03/04/2024, 22:28

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General

Target

2024-04-03_35cd5196973ea268366e117948e3234e_wannacry.exe
Size

138KB
MD5

35cd5196973ea268366e117948e3234e
SHA1

d3b0408dd73972b1228dbc6eedae887020069205
SHA256

d487a3562cfb46a5992deac8a154f6b84b4b046fb98252e51b9c75310a8e4610
SHA512

250080b16b12a3b36ea27a621ca1a9664aff0cbbd4e7c286ed030edad2a568d338c1f40817e9643b896ef23e5992372ee6866a972fdccac14005d02a1bff9f8e
SSDEEP

3072:Too9Lr9+OjsHL8Czl4rPT5E6JHztz3M1j/20:9r9+Ow8frT66tFYj/2

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/2144-0-0x0000000001310000-0x0000000001338000-memory.dmp	family_chaos
behavioral1/files/0x000a000000012272-6.dat	family_chaos
behavioral1/memory/2976-7-0x00000000012F0000-0x0000000001318000-memory.dmp	family_chaos
behavioral1/memory/2976-11-0x0000000001220000-0x00000000012A0000-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/2144-0-0x0000000001310000-0x0000000001338000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000a000000012272-6.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2976-7-0x00000000012F0000-0x0000000001318000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2976-11-0x0000000001220000-0x00000000012A0000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1904	bcdedit.exe
2808	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
1516	wbadmin.exe

Drops startup file 3 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2976	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\Public\Music\Sample Music\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\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\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\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\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\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\Documents\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\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\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\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-778096762-2241304387-192235952-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	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
1940	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-778096762-2241304387-192235952-1000_Classes\Local Settings	rundll32.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2976	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2144	2024-04-03_35cd5196973ea268366e117948e3234e_wannacry.exe
2144	2024-04-03_35cd5196973ea268366e117948e3234e_wannacry.exe
2976	svchost.exe
2976	svchost.exe
2976	svchost.exe
2976	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2964	AcroRd32.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2144	2024-04-03_35cd5196973ea268366e117948e3234e_wannacry.exe
Token: SeDebugPrivilege	2976	svchost.exe
Token: SeBackupPrivilege	1636	vssvc.exe
Token: SeRestorePrivilege	1636	vssvc.exe
Token: SeAuditPrivilege	1636	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2336	WMIC.exe
Token: SeSecurityPrivilege	2336	WMIC.exe
Token: SeTakeOwnershipPrivilege	2336	WMIC.exe
Token: SeLoadDriverPrivilege	2336	WMIC.exe
Token: SeSystemProfilePrivilege	2336	WMIC.exe
Token: SeSystemtimePrivilege	2336	WMIC.exe
Token: SeProfSingleProcessPrivilege	2336	WMIC.exe
Token: SeIncBasePriorityPrivilege	2336	WMIC.exe
Token: SeCreatePagefilePrivilege	2336	WMIC.exe
Token: SeBackupPrivilege	2336	WMIC.exe
Token: SeRestorePrivilege	2336	WMIC.exe
Token: SeShutdownPrivilege	2336	WMIC.exe
Token: SeDebugPrivilege	2336	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2336	WMIC.exe
Token: SeRemoteShutdownPrivilege	2336	WMIC.exe
Token: SeUndockPrivilege	2336	WMIC.exe
Token: SeManageVolumePrivilege	2336	WMIC.exe
Token: 33	2336	WMIC.exe
Token: 34	2336	WMIC.exe
Token: 35	2336	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2336	WMIC.exe
Token: SeSecurityPrivilege	2336	WMIC.exe
Token: SeTakeOwnershipPrivilege	2336	WMIC.exe
Token: SeLoadDriverPrivilege	2336	WMIC.exe
Token: SeSystemProfilePrivilege	2336	WMIC.exe
Token: SeSystemtimePrivilege	2336	WMIC.exe
Token: SeProfSingleProcessPrivilege	2336	WMIC.exe
Token: SeIncBasePriorityPrivilege	2336	WMIC.exe
Token: SeCreatePagefilePrivilege	2336	WMIC.exe
Token: SeBackupPrivilege	2336	WMIC.exe
Token: SeRestorePrivilege	2336	WMIC.exe
Token: SeShutdownPrivilege	2336	WMIC.exe
Token: SeDebugPrivilege	2336	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2336	WMIC.exe
Token: SeRemoteShutdownPrivilege	2336	WMIC.exe
Token: SeUndockPrivilege	2336	WMIC.exe
Token: SeManageVolumePrivilege	2336	WMIC.exe
Token: 33	2336	WMIC.exe
Token: 34	2336	WMIC.exe
Token: 35	2336	WMIC.exe
Token: SeBackupPrivilege	1804	wbengine.exe
Token: SeRestorePrivilege	1804	wbengine.exe
Token: SeSecurityPrivilege	1804	wbengine.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2964	AcroRd32.exe
2964	AcroRd32.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 2144 wrote to memory of 2976	2144	2024-04-03_35cd5196973ea268366e117948e3234e_wannacry.exe	28
PID 2144 wrote to memory of 2976	2144	2024-04-03_35cd5196973ea268366e117948e3234e_wannacry.exe	28
PID 2144 wrote to memory of 2976	2144	2024-04-03_35cd5196973ea268366e117948e3234e_wannacry.exe	28
PID 2976 wrote to memory of 756	2976	svchost.exe	30
PID 2976 wrote to memory of 756	2976	svchost.exe	30
PID 2976 wrote to memory of 756	2976	svchost.exe	30
PID 756 wrote to memory of 1940	756	cmd.exe	32
PID 756 wrote to memory of 1940	756	cmd.exe	32
PID 756 wrote to memory of 1940	756	cmd.exe	32
PID 756 wrote to memory of 2336	756	cmd.exe	36
PID 756 wrote to memory of 2336	756	cmd.exe	36
PID 756 wrote to memory of 2336	756	cmd.exe	36
PID 2976 wrote to memory of 1800	2976	svchost.exe	38
PID 2976 wrote to memory of 1800	2976	svchost.exe	38
PID 2976 wrote to memory of 1800	2976	svchost.exe	38
PID 1800 wrote to memory of 1904	1800	cmd.exe	40
PID 1800 wrote to memory of 1904	1800	cmd.exe	40
PID 1800 wrote to memory of 1904	1800	cmd.exe	40
PID 1800 wrote to memory of 2808	1800	cmd.exe	41
PID 1800 wrote to memory of 2808	1800	cmd.exe	41
PID 1800 wrote to memory of 2808	1800	cmd.exe	41
PID 2976 wrote to memory of 2140	2976	svchost.exe	42
PID 2976 wrote to memory of 2140	2976	svchost.exe	42
PID 2976 wrote to memory of 2140	2976	svchost.exe	42
PID 2140 wrote to memory of 1516	2140	cmd.exe	44
PID 2140 wrote to memory of 1516	2140	cmd.exe	44
PID 2140 wrote to memory of 1516	2140	cmd.exe	44
PID 2976 wrote to memory of 112	2976	svchost.exe	48
PID 2976 wrote to memory of 112	2976	svchost.exe	48
PID 2976 wrote to memory of 112	2976	svchost.exe	48
PID 112 wrote to memory of 2964	112	rundll32.exe	50
PID 112 wrote to memory of 2964	112	rundll32.exe	50
PID 112 wrote to memory of 2964	112	rundll32.exe	50
PID 112 wrote to memory of 2964	112	rundll32.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\2024-04-03_35cd5196973ea268366e117948e3234e_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-03_35cd5196973ea268366e117948e3234e_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2144
- 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)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2976
- - 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:756
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1940
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2336
- - 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:1800
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1904
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2808
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2140
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1516
- - C:\Windows\system32\rundll32.exe
    "C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Roaming\LEIA-ME txt
    3⤵
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:112
  - - C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
      "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Roaming\LEIA-ME txt"
      4⤵
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      PID:2964

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1636

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1804

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2876

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:684

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

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

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
31e244f3517a92af937a2e3d1041e1fc

SHA1
25dda9db43caeacd3b9e4db2218b79da575b20a3

SHA256
f376f4faace52d38bfacd619ab41486324d91afc3a9b450d62f27d7102232833

SHA512
08cf871163814c22f4e4f65774866c2ed07aae2c3e195241a362f46d79195a0e8b201eca09318740bf54309a85b4010f7f119c0fca8e5877a73a7e26c662ab69

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

Filesize
138KB

MD5
35cd5196973ea268366e117948e3234e

SHA1
d3b0408dd73972b1228dbc6eedae887020069205

SHA256
d487a3562cfb46a5992deac8a154f6b84b4b046fb98252e51b9c75310a8e4610

SHA512
250080b16b12a3b36ea27a621ca1a9664aff0cbbd4e7c286ed030edad2a568d338c1f40817e9643b896ef23e5992372ee6866a972fdccac14005d02a1bff9f8e

Download Submit
C:\Users\Admin\Documents\LEIA-ME txt

Filesize
555B

MD5
88e1775159b477cd84de858370a72243

SHA1
4ba54e4aff5187c036867b2c96c8ab7e75a7955c

SHA256
403de26691352cea37b29d2babc62f90c8995dff9a6a367be247ca388a8d1349

SHA512
76f9b5001f13488e66fee067140d68eba2082614f41e910d43c1f4b51c793db34b556aab3798714a18ad60e3c958da56d1414d8b74f799f0d72d09a89d03a521

Download Submit
memory/2144-0-0x0000000001310000-0x0000000001338000-memory.dmp

Filesize
160KB

Download
memory/2144-1-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2144-9-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2976-7-0x00000000012F0000-0x0000000001318000-memory.dmp

Filesize
160KB

Download
memory/2976-8-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2976-11-0x0000000001220000-0x00000000012A0000-memory.dmp

Filesize
512KB

Download
memory/2976-499-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2976-500-0x0000000001220000-0x00000000012A0000-memory.dmp

Filesize
512KB

Download