chaos | 2dec9e4e6c2b23869ee65cacc7f0011dc3592c5c2ba2da8358063741671a4ad6

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
06/04/2024, 15:35

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General

Target

2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
Size

280KB
MD5

4c5cb08f2367e302ecb42531c36776a0
SHA1

4f1d06dd3cb123214aa25aba3fd3d142cdc1e8dc
SHA256

2dec9e4e6c2b23869ee65cacc7f0011dc3592c5c2ba2da8358063741671a4ad6
SHA512

a79f4808e48872b65262aa3a57f1239eb0698c86f3f48f619d6cb6349d85c6e4007228e67eccc4e4158c83cc4fa4498066d26bf95fa9934c8ad2224ac10c0be4
SSDEEP

6144:qr9L8jq2Gteiy0KhK6bClLmlJNZtHim/WnA/77FfA4RL4xLZTogzI:jPGteiy0cKeeLmlJNZtCmGM7FfxLctTr

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/2184-0-0x0000000000040000-0x000000000008C000-memory.dmp	family_chaos
behavioral1/files/0x000c000000012331-5.dat	family_chaos
behavioral1/memory/1672-7-0x0000000001090000-0x00000000010DC000-memory.dmp	family_chaos
behavioral1/memory/1672-11-0x000000001AEF0000-0x000000001AF70000-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/2184-0-0x0000000000040000-0x000000000008C000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000c000000012331-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/1672-7-0x0000000001090000-0x00000000010DC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/1672-11-0x000000001AEF0000-0x000000001AF70000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
2128	bcdedit.exe
1236	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
1688	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
1672	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\Libraries\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\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\Links for United States\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\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\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\Public\Documents\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2721934792-624042501-2768869379-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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\Pictures\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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\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\Recent\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

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\d1blibsnh.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
2892	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1728	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1672	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2184	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
2184	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
1672	svchost.exe
1672	svchost.exe
1672	svchost.exe
1672	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2184	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
Token: SeDebugPrivilege	1672	svchost.exe
Token: SeBackupPrivilege	1360	vssvc.exe
Token: SeRestorePrivilege	1360	vssvc.exe
Token: SeAuditPrivilege	1360	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1856	WMIC.exe
Token: SeSecurityPrivilege	1856	WMIC.exe
Token: SeTakeOwnershipPrivilege	1856	WMIC.exe
Token: SeLoadDriverPrivilege	1856	WMIC.exe
Token: SeSystemProfilePrivilege	1856	WMIC.exe
Token: SeSystemtimePrivilege	1856	WMIC.exe
Token: SeProfSingleProcessPrivilege	1856	WMIC.exe
Token: SeIncBasePriorityPrivilege	1856	WMIC.exe
Token: SeCreatePagefilePrivilege	1856	WMIC.exe
Token: SeBackupPrivilege	1856	WMIC.exe
Token: SeRestorePrivilege	1856	WMIC.exe
Token: SeShutdownPrivilege	1856	WMIC.exe
Token: SeDebugPrivilege	1856	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1856	WMIC.exe
Token: SeRemoteShutdownPrivilege	1856	WMIC.exe
Token: SeUndockPrivilege	1856	WMIC.exe
Token: SeManageVolumePrivilege	1856	WMIC.exe
Token: 33	1856	WMIC.exe
Token: 34	1856	WMIC.exe
Token: 35	1856	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1856	WMIC.exe
Token: SeSecurityPrivilege	1856	WMIC.exe
Token: SeTakeOwnershipPrivilege	1856	WMIC.exe
Token: SeLoadDriverPrivilege	1856	WMIC.exe
Token: SeSystemProfilePrivilege	1856	WMIC.exe
Token: SeSystemtimePrivilege	1856	WMIC.exe
Token: SeProfSingleProcessPrivilege	1856	WMIC.exe
Token: SeIncBasePriorityPrivilege	1856	WMIC.exe
Token: SeCreatePagefilePrivilege	1856	WMIC.exe
Token: SeBackupPrivilege	1856	WMIC.exe
Token: SeRestorePrivilege	1856	WMIC.exe
Token: SeShutdownPrivilege	1856	WMIC.exe
Token: SeDebugPrivilege	1856	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1856	WMIC.exe
Token: SeRemoteShutdownPrivilege	1856	WMIC.exe
Token: SeUndockPrivilege	1856	WMIC.exe
Token: SeManageVolumePrivilege	1856	WMIC.exe
Token: 33	1856	WMIC.exe
Token: 34	1856	WMIC.exe
Token: 35	1856	WMIC.exe
Token: SeBackupPrivilege	2752	wbengine.exe
Token: SeRestorePrivilege	2752	wbengine.exe
Token: SeSecurityPrivilege	2752	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 1672	2184	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe	28
PID 2184 wrote to memory of 1672	2184	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe	28
PID 2184 wrote to memory of 1672	2184	2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe	28
PID 1672 wrote to memory of 2328	1672	svchost.exe	30
PID 1672 wrote to memory of 2328	1672	svchost.exe	30
PID 1672 wrote to memory of 2328	1672	svchost.exe	30
PID 2328 wrote to memory of 2892	2328	cmd.exe	32
PID 2328 wrote to memory of 2892	2328	cmd.exe	32
PID 2328 wrote to memory of 2892	2328	cmd.exe	32
PID 2328 wrote to memory of 1856	2328	cmd.exe	35
PID 2328 wrote to memory of 1856	2328	cmd.exe	35
PID 2328 wrote to memory of 1856	2328	cmd.exe	35
PID 1672 wrote to memory of 2096	1672	svchost.exe	37
PID 1672 wrote to memory of 2096	1672	svchost.exe	37
PID 1672 wrote to memory of 2096	1672	svchost.exe	37
PID 2096 wrote to memory of 2128	2096	cmd.exe	39
PID 2096 wrote to memory of 2128	2096	cmd.exe	39
PID 2096 wrote to memory of 2128	2096	cmd.exe	39
PID 2096 wrote to memory of 1236	2096	cmd.exe	40
PID 2096 wrote to memory of 1236	2096	cmd.exe	40
PID 2096 wrote to memory of 1236	2096	cmd.exe	40
PID 1672 wrote to memory of 2468	1672	svchost.exe	41
PID 1672 wrote to memory of 2468	1672	svchost.exe	41
PID 1672 wrote to memory of 2468	1672	svchost.exe	41
PID 2468 wrote to memory of 1688	2468	cmd.exe	43
PID 2468 wrote to memory of 1688	2468	cmd.exe	43
PID 2468 wrote to memory of 1688	2468	cmd.exe	43
PID 1672 wrote to memory of 1728	1672	svchost.exe	47
PID 1672 wrote to memory of 1728	1672	svchost.exe	47
PID 1672 wrote to memory of 1728	1672	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\2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_4c5cb08f2367e302ecb42531c36776a0_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2184
- 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:1672
- - 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:2328
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2892
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1856
- - 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:2096
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2128
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1236
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2468
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1688
- - 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:1728

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1360

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2752

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2200

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1924

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
280KB

MD5
4c5cb08f2367e302ecb42531c36776a0

SHA1
4f1d06dd3cb123214aa25aba3fd3d142cdc1e8dc

SHA256
2dec9e4e6c2b23869ee65cacc7f0011dc3592c5c2ba2da8358063741671a4ad6

SHA512
a79f4808e48872b65262aa3a57f1239eb0698c86f3f48f619d6cb6349d85c6e4007228e67eccc4e4158c83cc4fa4498066d26bf95fa9934c8ad2224ac10c0be4

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

Filesize
984B

MD5
a9025b6c8b3bd35e386bb0f8b97c6f2f

SHA1
322cfbb0af7316d54ba22d2db71ad7e9cede073e

SHA256
c88315ca4262a30f70a14fc49729c31e78c5cd40c6a34660964b0c121d064954

SHA512
48072e27249be0b3ec835de962c2b1a842748d1541c06a439a1f3fe61afed4e45051c641bb2e4975b71664e79be61e9982dcb0d6e2000b3ab413c445e5850d40

Download Submit
memory/1672-9-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/1672-7-0x0000000001090000-0x00000000010DC000-memory.dmp

Filesize
304KB

Download
memory/1672-11-0x000000001AEF0000-0x000000001AF70000-memory.dmp

Filesize
512KB

Download
memory/1672-451-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/1672-452-0x000000001AEF0000-0x000000001AF70000-memory.dmp

Filesize
512KB

Download
memory/2184-0-0x0000000000040000-0x000000000008C000-memory.dmp

Filesize
304KB

Download
memory/2184-1-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/2184-8-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download