chaos | fd7740837a82aed3fcce2869488e128bd7524fcf78f1f38bb604aea6e39d3469

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-04-2024 20:37

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General

Target

2024-04-15_463db363dcf29c2d1d498952586d815a_wannacry.exe
Size

229KB
MD5

463db363dcf29c2d1d498952586d815a
SHA1

19145465538f02d6c4ab954bf45157badc18bf60
SHA256

fd7740837a82aed3fcce2869488e128bd7524fcf78f1f38bb604aea6e39d3469
SHA512

2e6618f4515f14916ad5b83b71d5c00c0e3dea7656cfbd1d598cfcd6f3cc418a679b5bdb1efdc4882e0ebc9b0c1f4a8dc4431706ebb8476b1d8f236d4b7c5985
SSDEEP

3072:13kLQj6Lr9SWWZt+em3xr8E1Q8dm0NYuaacYee2bE6//hXngpw4MmFQGvDr3S:cVr9SRVr0Cu+Fp8Hvn3

Score

10^/10

chaos evasion 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/2844-0-0x00000000011B0000-0x00000000011F0000-memory.dmp	family_chaos
behavioral1/files/0x000b000000013a06-5.dat	family_chaos
behavioral1/memory/2180-7-0x0000000001100000-0x0000000001140000-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 3 IoCs

resource	yara_rule
behavioral1/memory/2844-0-0x00000000011B0000-0x00000000011F0000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000b000000013a06-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2180-7-0x0000000001100000-0x0000000001140000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2744	bcdedit.exe
2784	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
1316	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_ME.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2180	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\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\Admin\Contacts\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\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\Recent\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	F:\$RECYCLE.BIN\S-1-5-21-3452737119-3959686427-228443150-1000\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\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\Accessibility\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\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\Internet Explorer\Quick Launch\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\Music\Sample Music\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\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\Desktop\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\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\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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-1-5-21-3452737119-3959686427-228443150-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\u1slv2p7m.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
2488	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
668	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2180	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2844	2024-04-15_463db363dcf29c2d1d498952586d815a_wannacry.exe
2844	2024-04-15_463db363dcf29c2d1d498952586d815a_wannacry.exe
2180	svchost.exe
2180	svchost.exe
2180	svchost.exe
2180	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2844	2024-04-15_463db363dcf29c2d1d498952586d815a_wannacry.exe
Token: SeDebugPrivilege	2180	svchost.exe
Token: SeBackupPrivilege	756	vssvc.exe
Token: SeRestorePrivilege	756	vssvc.exe
Token: SeAuditPrivilege	756	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2176	WMIC.exe
Token: SeSecurityPrivilege	2176	WMIC.exe
Token: SeTakeOwnershipPrivilege	2176	WMIC.exe
Token: SeLoadDriverPrivilege	2176	WMIC.exe
Token: SeSystemProfilePrivilege	2176	WMIC.exe
Token: SeSystemtimePrivilege	2176	WMIC.exe
Token: SeProfSingleProcessPrivilege	2176	WMIC.exe
Token: SeIncBasePriorityPrivilege	2176	WMIC.exe
Token: SeCreatePagefilePrivilege	2176	WMIC.exe
Token: SeBackupPrivilege	2176	WMIC.exe
Token: SeRestorePrivilege	2176	WMIC.exe
Token: SeShutdownPrivilege	2176	WMIC.exe
Token: SeDebugPrivilege	2176	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2176	WMIC.exe
Token: SeRemoteShutdownPrivilege	2176	WMIC.exe
Token: SeUndockPrivilege	2176	WMIC.exe
Token: SeManageVolumePrivilege	2176	WMIC.exe
Token: 33	2176	WMIC.exe
Token: 34	2176	WMIC.exe
Token: 35	2176	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2176	WMIC.exe
Token: SeSecurityPrivilege	2176	WMIC.exe
Token: SeTakeOwnershipPrivilege	2176	WMIC.exe
Token: SeLoadDriverPrivilege	2176	WMIC.exe
Token: SeSystemProfilePrivilege	2176	WMIC.exe
Token: SeSystemtimePrivilege	2176	WMIC.exe
Token: SeProfSingleProcessPrivilege	2176	WMIC.exe
Token: SeIncBasePriorityPrivilege	2176	WMIC.exe
Token: SeCreatePagefilePrivilege	2176	WMIC.exe
Token: SeBackupPrivilege	2176	WMIC.exe
Token: SeRestorePrivilege	2176	WMIC.exe
Token: SeShutdownPrivilege	2176	WMIC.exe
Token: SeDebugPrivilege	2176	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2176	WMIC.exe
Token: SeRemoteShutdownPrivilege	2176	WMIC.exe
Token: SeUndockPrivilege	2176	WMIC.exe
Token: SeManageVolumePrivilege	2176	WMIC.exe
Token: 33	2176	WMIC.exe
Token: 34	2176	WMIC.exe
Token: 35	2176	WMIC.exe
Token: SeBackupPrivilege	2324	wbengine.exe
Token: SeRestorePrivilege	2324	wbengine.exe
Token: SeSecurityPrivilege	2324	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2844 wrote to memory of 2180	2844	2024-04-15_463db363dcf29c2d1d498952586d815a_wannacry.exe	28
PID 2844 wrote to memory of 2180	2844	2024-04-15_463db363dcf29c2d1d498952586d815a_wannacry.exe	28
PID 2844 wrote to memory of 2180	2844	2024-04-15_463db363dcf29c2d1d498952586d815a_wannacry.exe	28
PID 2180 wrote to memory of 2444	2180	svchost.exe	29
PID 2180 wrote to memory of 2444	2180	svchost.exe	29
PID 2180 wrote to memory of 2444	2180	svchost.exe	29
PID 2444 wrote to memory of 2488	2444	cmd.exe	31
PID 2444 wrote to memory of 2488	2444	cmd.exe	31
PID 2444 wrote to memory of 2488	2444	cmd.exe	31
PID 2444 wrote to memory of 2176	2444	cmd.exe	35
PID 2444 wrote to memory of 2176	2444	cmd.exe	35
PID 2444 wrote to memory of 2176	2444	cmd.exe	35
PID 2180 wrote to memory of 2768	2180	svchost.exe	37
PID 2180 wrote to memory of 2768	2180	svchost.exe	37
PID 2180 wrote to memory of 2768	2180	svchost.exe	37
PID 2768 wrote to memory of 2744	2768	cmd.exe	39
PID 2768 wrote to memory of 2744	2768	cmd.exe	39
PID 2768 wrote to memory of 2744	2768	cmd.exe	39
PID 2768 wrote to memory of 2784	2768	cmd.exe	40
PID 2768 wrote to memory of 2784	2768	cmd.exe	40
PID 2768 wrote to memory of 2784	2768	cmd.exe	40
PID 2180 wrote to memory of 1984	2180	svchost.exe	41
PID 2180 wrote to memory of 1984	2180	svchost.exe	41
PID 2180 wrote to memory of 1984	2180	svchost.exe	41
PID 1984 wrote to memory of 1316	1984	cmd.exe	43
PID 1984 wrote to memory of 1316	1984	cmd.exe	43
PID 1984 wrote to memory of 1316	1984	cmd.exe	43
PID 2180 wrote to memory of 668	2180	svchost.exe	47
PID 2180 wrote to memory of 668	2180	svchost.exe	47
PID 2180 wrote to memory of 668	2180	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\2024-04-15_463db363dcf29c2d1d498952586d815a_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_463db363dcf29c2d1d498952586d815a_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2844
- 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:2180
- - 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:2444
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2488
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2176
- - 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:2768
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2744
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2784
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1984
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1316
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\READ_ME.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:668

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:756

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2324

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2096

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
229KB

MD5
463db363dcf29c2d1d498952586d815a

SHA1
19145465538f02d6c4ab954bf45157badc18bf60

SHA256
fd7740837a82aed3fcce2869488e128bd7524fcf78f1f38bb604aea6e39d3469

SHA512
2e6618f4515f14916ad5b83b71d5c00c0e3dea7656cfbd1d598cfcd6f3cc418a679b5bdb1efdc4882e0ebc9b0c1f4a8dc4431706ebb8476b1d8f236d4b7c5985

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

Filesize
45B

MD5
0ec4d0317f9ae087ae1972b1d29e81e8

SHA1
b385917c22675e13c2f16492f3b3a254ac3e5262

SHA256
0c534a67e4f2c40b641a4be15304119316bbf93c12fa2d63ee219a92303f981b

SHA512
21d65dfaef39b478d3156499f949f4d79f0091de7eddd86802f5515c9abfbdf1c0981b8094f9a474e217efdb97931e093d08b3fd2fa2e6a92b461d71f8d7205d

Download Submit
memory/2180-7-0x0000000001100000-0x0000000001140000-memory.dmp

Filesize
256KB

Download
memory/2180-9-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download
memory/2180-73-0x0000000000560000-0x00000000005E0000-memory.dmp

Filesize
512KB

Download
memory/2180-74-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download
memory/2180-75-0x0000000000560000-0x00000000005E0000-memory.dmp

Filesize
512KB

Download
memory/2844-0-0x00000000011B0000-0x00000000011F0000-memory.dmp

Filesize
256KB

Download
memory/2844-1-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download
memory/2844-8-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download