chaos | 0640261e1185fc1b8174975a96a60a54ff0b89c006dfba61a0e2e9256690fa67

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
15-06-2024 11:25

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General

Target

2024-06-15_c59b146527f64f61bab43738e42a4584_wannacry.exe
Size

621KB
MD5

c59b146527f64f61bab43738e42a4584
SHA1

81335c9ae2895102ffab8dfade3435e617cb762b
SHA256

0640261e1185fc1b8174975a96a60a54ff0b89c006dfba61a0e2e9256690fa67
SHA512

601c3be9f390e51d61e27874073722cac440ae82243e78b6b14576d63e619968500ab16ea7352e4fb0851b46fa081372cf2153a6daf014842d9668d71b7ad611
SSDEEP

12288:D4cOG8Hjr47Ua00F2A71DdkA5gmzrM1TZYODC15rHAraEmCs3eBWKFrVHOX17c8:UqFwtZen1h

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/2244-1-0x0000000000850000-0x00000000008F2000-memory.dmp	family_chaos
behavioral1/files/0x000c000000012281-5.dat	family_chaos
behavioral1/memory/2136-7-0x0000000000270000-0x0000000000312000-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

Detects command variations typically used by ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2244-1-0x0000000000850000-0x00000000008F2000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000c000000012281-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2136-7-0x0000000000270000-0x0000000000312000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
560	bcdedit.exe
2552	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
1260	wbadmin.exe

Drops startup file 3 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2136	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\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\Public\Music\Sample Music\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	F:\$RECYCLE.BIN\S-1-5-21-39690363-730359138-1046745555-1000\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\Recent\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\Accessories\Accessibility\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\Videos\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\Music\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\Libraries\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\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\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\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-1-5-21-39690363-730359138-1046745555-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8yn9o1kuc.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
2556	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1052	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2136	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2244	2024-06-15_c59b146527f64f61bab43738e42a4584_wannacry.exe
2244	2024-06-15_c59b146527f64f61bab43738e42a4584_wannacry.exe
2136	svchost.exe
2136	svchost.exe
2136	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2244	2024-06-15_c59b146527f64f61bab43738e42a4584_wannacry.exe
Token: SeDebugPrivilege	2136	svchost.exe
Token: SeBackupPrivilege	2952	vssvc.exe
Token: SeRestorePrivilege	2952	vssvc.exe
Token: SeAuditPrivilege	2952	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1972	WMIC.exe
Token: SeSecurityPrivilege	1972	WMIC.exe
Token: SeTakeOwnershipPrivilege	1972	WMIC.exe
Token: SeLoadDriverPrivilege	1972	WMIC.exe
Token: SeSystemProfilePrivilege	1972	WMIC.exe
Token: SeSystemtimePrivilege	1972	WMIC.exe
Token: SeProfSingleProcessPrivilege	1972	WMIC.exe
Token: SeIncBasePriorityPrivilege	1972	WMIC.exe
Token: SeCreatePagefilePrivilege	1972	WMIC.exe
Token: SeBackupPrivilege	1972	WMIC.exe
Token: SeRestorePrivilege	1972	WMIC.exe
Token: SeShutdownPrivilege	1972	WMIC.exe
Token: SeDebugPrivilege	1972	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1972	WMIC.exe
Token: SeRemoteShutdownPrivilege	1972	WMIC.exe
Token: SeUndockPrivilege	1972	WMIC.exe
Token: SeManageVolumePrivilege	1972	WMIC.exe
Token: 33	1972	WMIC.exe
Token: 34	1972	WMIC.exe
Token: 35	1972	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1972	WMIC.exe
Token: SeSecurityPrivilege	1972	WMIC.exe
Token: SeTakeOwnershipPrivilege	1972	WMIC.exe
Token: SeLoadDriverPrivilege	1972	WMIC.exe
Token: SeSystemProfilePrivilege	1972	WMIC.exe
Token: SeSystemtimePrivilege	1972	WMIC.exe
Token: SeProfSingleProcessPrivilege	1972	WMIC.exe
Token: SeIncBasePriorityPrivilege	1972	WMIC.exe
Token: SeCreatePagefilePrivilege	1972	WMIC.exe
Token: SeBackupPrivilege	1972	WMIC.exe
Token: SeRestorePrivilege	1972	WMIC.exe
Token: SeShutdownPrivilege	1972	WMIC.exe
Token: SeDebugPrivilege	1972	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1972	WMIC.exe
Token: SeRemoteShutdownPrivilege	1972	WMIC.exe
Token: SeUndockPrivilege	1972	WMIC.exe
Token: SeManageVolumePrivilege	1972	WMIC.exe
Token: 33	1972	WMIC.exe
Token: 34	1972	WMIC.exe
Token: 35	1972	WMIC.exe
Token: SeBackupPrivilege	1332	wbengine.exe
Token: SeRestorePrivilege	1332	wbengine.exe
Token: SeSecurityPrivilege	1332	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2244 wrote to memory of 2136	2244	2024-06-15_c59b146527f64f61bab43738e42a4584_wannacry.exe	28
PID 2244 wrote to memory of 2136	2244	2024-06-15_c59b146527f64f61bab43738e42a4584_wannacry.exe	28
PID 2244 wrote to memory of 2136	2244	2024-06-15_c59b146527f64f61bab43738e42a4584_wannacry.exe	28
PID 2136 wrote to memory of 2764	2136	svchost.exe	30
PID 2136 wrote to memory of 2764	2136	svchost.exe	30
PID 2136 wrote to memory of 2764	2136	svchost.exe	30
PID 2764 wrote to memory of 2556	2764	cmd.exe	32
PID 2764 wrote to memory of 2556	2764	cmd.exe	32
PID 2764 wrote to memory of 2556	2764	cmd.exe	32
PID 2764 wrote to memory of 1972	2764	cmd.exe	35
PID 2764 wrote to memory of 1972	2764	cmd.exe	35
PID 2764 wrote to memory of 1972	2764	cmd.exe	35
PID 2136 wrote to memory of 2408	2136	svchost.exe	37
PID 2136 wrote to memory of 2408	2136	svchost.exe	37
PID 2136 wrote to memory of 2408	2136	svchost.exe	37
PID 2408 wrote to memory of 560	2408	cmd.exe	39
PID 2408 wrote to memory of 560	2408	cmd.exe	39
PID 2408 wrote to memory of 560	2408	cmd.exe	39
PID 2408 wrote to memory of 2552	2408	cmd.exe	40
PID 2408 wrote to memory of 2552	2408	cmd.exe	40
PID 2408 wrote to memory of 2552	2408	cmd.exe	40
PID 2136 wrote to memory of 1840	2136	svchost.exe	41
PID 2136 wrote to memory of 1840	2136	svchost.exe	41
PID 2136 wrote to memory of 1840	2136	svchost.exe	41
PID 1840 wrote to memory of 1260	1840	cmd.exe	43
PID 1840 wrote to memory of 1260	1840	cmd.exe	43
PID 1840 wrote to memory of 1260	1840	cmd.exe	43
PID 2136 wrote to memory of 1052	2136	svchost.exe	47
PID 2136 wrote to memory of 1052	2136	svchost.exe	47
PID 2136 wrote to memory of 1052	2136	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\2024-06-15_c59b146527f64f61bab43738e42a4584_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-15_c59b146527f64f61bab43738e42a4584_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2244
- 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:2136
- - 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:2764
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2556
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1972
- - 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:2408
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:560
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2552
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1840
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1260
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\hacked.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1052

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2952

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1332

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1924

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2304

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

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
621KB

MD5
c59b146527f64f61bab43738e42a4584

SHA1
81335c9ae2895102ffab8dfade3435e617cb762b

SHA256
0640261e1185fc1b8174975a96a60a54ff0b89c006dfba61a0e2e9256690fa67

SHA512
601c3be9f390e51d61e27874073722cac440ae82243e78b6b14576d63e619968500ab16ea7352e4fb0851b46fa081372cf2153a6daf014842d9668d71b7ad611

Download Submit
C:\Users\Admin\Desktop\hacked.txt

Filesize
111B

MD5
16e3d81f6318d3cb18986b570cc137ed

SHA1
b00ec755320fa9078e84b6f40bb40ff77269242e

SHA256
a95d0e0978883c0e2355b739b59a09e4dea647a303a13a87ab855f56bad232f9

SHA512
05ae58d6ba4a51ef8ac78babc383aaac6f2aac69ee70474546cfcf3534c39f9e76113ad6e28752049a552f9afbd876b2450db33d2430eddcf0a8f219d9ab2e2d

Download Submit
memory/2136-7-0x0000000000270000-0x0000000000312000-memory.dmp

Filesize
648KB

Download
memory/2136-55-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp

Filesize
9.9MB

Download
memory/2136-71-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp

Filesize
9.9MB

Download
memory/2136-72-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp

Filesize
9.9MB

Download
memory/2136-73-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp

Filesize
9.9MB

Download
memory/2244-0-0x000007FEF5B93000-0x000007FEF5B94000-memory.dmp

Filesize
4KB

Download
memory/2244-1-0x0000000000850000-0x00000000008F2000-memory.dmp

Filesize
648KB

Download