chaos | f4a5aa80ca26fec66638d8d42d54bf261580b8a2d6a664cf74dd47028bfe20a8

Analysis

max time kernel
36s
max time network
30s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
17-03-2023 04:24

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General

Target

2023-03-16_80588ef251b3ebaa3da89fece7dd9743_wannacry.exe
Size

238KB
MD5

80588ef251b3ebaa3da89fece7dd9743
SHA1

8e9cadf5793282e9c3127b0c6de07960fe087711
SHA256

f4a5aa80ca26fec66638d8d42d54bf261580b8a2d6a664cf74dd47028bfe20a8
SHA512

c0a3c0838fb06584abf877d60a483577ce3a3f9af99d8028662f507c6b7f2c9545b5462072cc2ba72a699b047fc107396df7f3ceae209ee72c2b987506ad6b1f
SSDEEP

3072:NoMYir9nL9z3+wdSe1WcBRjpW5VFMNBDf5qIS/QWqGiUEJhREVUAISsdWBYf7DSc:1r9nLhxhdsVFGEeRJk8nrKfQC

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 5 IoCs

resource	yara_rule
behavioral1/memory/1696-54-0x0000000001170000-0x00000000011B2000-memory.dmp	family_chaos
behavioral1/files/0x002000000000f683-58.dat	family_chaos
behavioral1/files/0x002000000000f683-59.dat	family_chaos
behavioral1/memory/784-60-0x00000000009C0000-0x0000000000A02000-memory.dmp	family_chaos
behavioral1/memory/784-98-0x000000001A980000-0x000000001AA00000-memory.dmp	family_chaos

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1764	bcdedit.exe
1696	bcdedit.exe

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command-Line Interface

T1059

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
1672	wbadmin.exe

Modifies extensions of user files 4 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\DebugSelect.raw => C:\Users\Admin\Pictures\DebugSelect.raw.TuRkEy	svchost.exe
File renamed	C:\Users\Admin\Pictures\SelectReceive.tif => C:\Users\Admin\Pictures\SelectReceive.tif.TuRkEy	svchost.exe
File renamed	C:\Users\Admin\Pictures\SuspendTest.tif => C:\Users\Admin\Pictures\SuspendTest.tif.TuRkEy	svchost.exe
File renamed	C:\Users\Admin\Pictures\UseStop.raw => C:\Users\Admin\Pictures\UseStop.raw.TuRkEy	svchost.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\Instruction.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
784	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
T1081

Drops desktop.ini file(s) 33 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\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\Videos\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\Accessibility\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\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\Internet Explorer\Quick Launch\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\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\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\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\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\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\Favorites\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\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\hna27d4rp.jpg"	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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

T1107

Inhibit System Recovery

T1490

pid	Process
436	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1252	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
784	svchost.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1696	2023-03-16_80588ef251b3ebaa3da89fece7dd9743_wannacry.exe
784	svchost.exe
784	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1696	2023-03-16_80588ef251b3ebaa3da89fece7dd9743_wannacry.exe
Token: SeDebugPrivilege	784	svchost.exe
Token: SeBackupPrivilege	1592	vssvc.exe
Token: SeRestorePrivilege	1592	vssvc.exe
Token: SeAuditPrivilege	1592	vssvc.exe
Token: SeIncreaseQuotaPrivilege	868	WMIC.exe
Token: SeSecurityPrivilege	868	WMIC.exe
Token: SeTakeOwnershipPrivilege	868	WMIC.exe
Token: SeLoadDriverPrivilege	868	WMIC.exe
Token: SeSystemProfilePrivilege	868	WMIC.exe
Token: SeSystemtimePrivilege	868	WMIC.exe
Token: SeProfSingleProcessPrivilege	868	WMIC.exe
Token: SeIncBasePriorityPrivilege	868	WMIC.exe
Token: SeCreatePagefilePrivilege	868	WMIC.exe
Token: SeBackupPrivilege	868	WMIC.exe
Token: SeRestorePrivilege	868	WMIC.exe
Token: SeShutdownPrivilege	868	WMIC.exe
Token: SeDebugPrivilege	868	WMIC.exe
Token: SeSystemEnvironmentPrivilege	868	WMIC.exe
Token: SeRemoteShutdownPrivilege	868	WMIC.exe
Token: SeUndockPrivilege	868	WMIC.exe
Token: SeManageVolumePrivilege	868	WMIC.exe
Token: 33	868	WMIC.exe
Token: 34	868	WMIC.exe
Token: 35	868	WMIC.exe
Token: SeIncreaseQuotaPrivilege	868	WMIC.exe
Token: SeSecurityPrivilege	868	WMIC.exe
Token: SeTakeOwnershipPrivilege	868	WMIC.exe
Token: SeLoadDriverPrivilege	868	WMIC.exe
Token: SeSystemProfilePrivilege	868	WMIC.exe
Token: SeSystemtimePrivilege	868	WMIC.exe
Token: SeProfSingleProcessPrivilege	868	WMIC.exe
Token: SeIncBasePriorityPrivilege	868	WMIC.exe
Token: SeCreatePagefilePrivilege	868	WMIC.exe
Token: SeBackupPrivilege	868	WMIC.exe
Token: SeRestorePrivilege	868	WMIC.exe
Token: SeShutdownPrivilege	868	WMIC.exe
Token: SeDebugPrivilege	868	WMIC.exe
Token: SeSystemEnvironmentPrivilege	868	WMIC.exe
Token: SeRemoteShutdownPrivilege	868	WMIC.exe
Token: SeUndockPrivilege	868	WMIC.exe
Token: SeManageVolumePrivilege	868	WMIC.exe
Token: 33	868	WMIC.exe
Token: 34	868	WMIC.exe
Token: 35	868	WMIC.exe
Token: SeBackupPrivilege	1716	wbengine.exe
Token: SeRestorePrivilege	1716	wbengine.exe
Token: SeSecurityPrivilege	1716	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 784	1696	2023-03-16_80588ef251b3ebaa3da89fece7dd9743_wannacry.exe	26
PID 1696 wrote to memory of 784	1696	2023-03-16_80588ef251b3ebaa3da89fece7dd9743_wannacry.exe	26
PID 1696 wrote to memory of 784	1696	2023-03-16_80588ef251b3ebaa3da89fece7dd9743_wannacry.exe	26
PID 784 wrote to memory of 1344	784	svchost.exe	28
PID 784 wrote to memory of 1344	784	svchost.exe	28
PID 784 wrote to memory of 1344	784	svchost.exe	28
PID 1344 wrote to memory of 436	1344	cmd.exe	31
PID 1344 wrote to memory of 436	1344	cmd.exe	31
PID 1344 wrote to memory of 436	1344	cmd.exe	31
PID 1344 wrote to memory of 868	1344	cmd.exe	34
PID 1344 wrote to memory of 868	1344	cmd.exe	34
PID 1344 wrote to memory of 868	1344	cmd.exe	34
PID 784 wrote to memory of 876	784	svchost.exe	36
PID 784 wrote to memory of 876	784	svchost.exe	36
PID 784 wrote to memory of 876	784	svchost.exe	36
PID 876 wrote to memory of 1764	876	cmd.exe	38
PID 876 wrote to memory of 1764	876	cmd.exe	38
PID 876 wrote to memory of 1764	876	cmd.exe	38
PID 876 wrote to memory of 1696	876	cmd.exe	39
PID 876 wrote to memory of 1696	876	cmd.exe	39
PID 876 wrote to memory of 1696	876	cmd.exe	39
PID 784 wrote to memory of 480	784	svchost.exe	40
PID 784 wrote to memory of 480	784	svchost.exe	40
PID 784 wrote to memory of 480	784	svchost.exe	40
PID 480 wrote to memory of 1672	480	cmd.exe	42
PID 480 wrote to memory of 1672	480	cmd.exe	42
PID 480 wrote to memory of 1672	480	cmd.exe	42
PID 784 wrote to memory of 1252	784	svchost.exe	46
PID 784 wrote to memory of 1252	784	svchost.exe	46
PID 784 wrote to memory of 1252	784	svchost.exe	46

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\2023-03-16_80588ef251b3ebaa3da89fece7dd9743_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2023-03-16_80588ef251b3ebaa3da89fece7dd9743_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Modifies extensions of user files
  - 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:784
- - 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:1344
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:436
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:868
- - 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:876
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1764
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1696
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:480
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1672
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Instruction.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1252

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1592

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1716

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1524

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1000

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

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\Instruction.txt

Filesize
950B

MD5
4994c8b847fd4a18d29d61c91b8ad55d

SHA1
3ae3975e5f89d4c2fdaed33d53e32e53e04aef4c

SHA256
c30c92f3434b6f4c6174a0cbda1967c09afff3077bcba22f63232b66f330b16f

SHA512
07c5a188d4c9209562777cdb07df971a41f29b49511434d91b05f0846e9960a1402c11336d1e0ee5eed770217010b602eb358ee2e64eb3c0a5146a1d2a034f8f

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

Filesize
238KB

MD5
80588ef251b3ebaa3da89fece7dd9743

SHA1
8e9cadf5793282e9c3127b0c6de07960fe087711

SHA256
f4a5aa80ca26fec66638d8d42d54bf261580b8a2d6a664cf74dd47028bfe20a8

SHA512
c0a3c0838fb06584abf877d60a483577ce3a3f9af99d8028662f507c6b7f2c9545b5462072cc2ba72a699b047fc107396df7f3ceae209ee72c2b987506ad6b1f

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

Filesize
238KB

MD5
80588ef251b3ebaa3da89fece7dd9743

SHA1
8e9cadf5793282e9c3127b0c6de07960fe087711

SHA256
f4a5aa80ca26fec66638d8d42d54bf261580b8a2d6a664cf74dd47028bfe20a8

SHA512
c0a3c0838fb06584abf877d60a483577ce3a3f9af99d8028662f507c6b7f2c9545b5462072cc2ba72a699b047fc107396df7f3ceae209ee72c2b987506ad6b1f

Download Submit
C:\Users\Admin\Downloads\Instruction.txt

Filesize
950B

MD5
4994c8b847fd4a18d29d61c91b8ad55d

SHA1
3ae3975e5f89d4c2fdaed33d53e32e53e04aef4c

SHA256
c30c92f3434b6f4c6174a0cbda1967c09afff3077bcba22f63232b66f330b16f

SHA512
07c5a188d4c9209562777cdb07df971a41f29b49511434d91b05f0846e9960a1402c11336d1e0ee5eed770217010b602eb358ee2e64eb3c0a5146a1d2a034f8f

Download Submit
memory/784-60-0x00000000009C0000-0x0000000000A02000-memory.dmp

Filesize
264KB

Download
memory/784-98-0x000000001A980000-0x000000001AA00000-memory.dmp

Filesize
512KB

Download
memory/784-509-0x000000001A980000-0x000000001AA00000-memory.dmp

Filesize
512KB

Download
memory/1696-54-0x0000000001170000-0x00000000011B2000-memory.dmp

Filesize
264KB

Download