chaos | 881bac57f08bf408d9816f103ed731ef9c77e51193f9268fec7dd2921ac2ad68

Analysis

max time kernel
24s
max time network
17s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
20-07-2024 13:32

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General

Target

0x000800000001aa1b-29.exe
Size

1.2MB
MD5

e4ea9a5aee8f1d7576d8237b52fe345c
SHA1

abf5a63f22b6d953a3cf8304f52cd2ceb1701055
SHA256

d2d89b20e8f6fed21b4d8747df80d8c43107853e9d820cb9d5aeb832a36d773b
SHA512

761f1ca9ea9dd5c2c0930d3681467924a1d4ab9cd64d02ddbe2d8555a021e96f9f8b260c3a80ea96d18115999f2289686b4644ee240864a0d3000620facf90e8
SSDEEP

24576:SDCXO+I0bJuHAxXYessipGbea7pxn7bT2rgQ:SDSvIOB3E65

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/1904-1-0x0000000000A70000-0x0000000000BA6000-memory.dmp	family_chaos
behavioral1/files/0x00090000000120f9-5.dat	family_chaos
behavioral1/memory/2796-7-0x00000000013B0000-0x00000000014E6000-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

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1308	bcdedit.exe
2092	bcdedit.exe

Renames multiple (201) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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 created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XXX555.url	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	XXX555.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\RESTORE.txt	XXX555.exe

Executes dropped EXE 1 IoCs

pid	Process
2796	XXX555.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\Contacts\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	XXX555.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	XXX555.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3551809350-4263495960-1443967649-1000\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	XXX555.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	XXX555.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	XXX555.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-1-5-21-3551809350-4263495960-1443967649-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\x6bsajp5z.jpg"	XXX555.exe

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

System Information Discovery
T1082

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
2288	vssadmin.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2796	XXX555.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1904	0x000800000001aa1b-29.exe
1904	0x000800000001aa1b-29.exe
1904	0x000800000001aa1b-29.exe
2796	XXX555.exe
2796	XXX555.exe
2796	XXX555.exe
2796	XXX555.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1904	0x000800000001aa1b-29.exe
Token: SeDebugPrivilege	2796	XXX555.exe
Token: SeBackupPrivilege	2864	vssvc.exe
Token: SeRestorePrivilege	2864	vssvc.exe
Token: SeAuditPrivilege	2864	vssvc.exe
Token: SeIncreaseQuotaPrivilege	2816	WMIC.exe
Token: SeSecurityPrivilege	2816	WMIC.exe
Token: SeTakeOwnershipPrivilege	2816	WMIC.exe
Token: SeLoadDriverPrivilege	2816	WMIC.exe
Token: SeSystemProfilePrivilege	2816	WMIC.exe
Token: SeSystemtimePrivilege	2816	WMIC.exe
Token: SeProfSingleProcessPrivilege	2816	WMIC.exe
Token: SeIncBasePriorityPrivilege	2816	WMIC.exe
Token: SeCreatePagefilePrivilege	2816	WMIC.exe
Token: SeBackupPrivilege	2816	WMIC.exe
Token: SeRestorePrivilege	2816	WMIC.exe
Token: SeShutdownPrivilege	2816	WMIC.exe
Token: SeDebugPrivilege	2816	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2816	WMIC.exe
Token: SeRemoteShutdownPrivilege	2816	WMIC.exe
Token: SeUndockPrivilege	2816	WMIC.exe
Token: SeManageVolumePrivilege	2816	WMIC.exe
Token: 33	2816	WMIC.exe
Token: 34	2816	WMIC.exe
Token: 35	2816	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2816	WMIC.exe
Token: SeSecurityPrivilege	2816	WMIC.exe
Token: SeTakeOwnershipPrivilege	2816	WMIC.exe
Token: SeLoadDriverPrivilege	2816	WMIC.exe
Token: SeSystemProfilePrivilege	2816	WMIC.exe
Token: SeSystemtimePrivilege	2816	WMIC.exe
Token: SeProfSingleProcessPrivilege	2816	WMIC.exe
Token: SeIncBasePriorityPrivilege	2816	WMIC.exe
Token: SeCreatePagefilePrivilege	2816	WMIC.exe
Token: SeBackupPrivilege	2816	WMIC.exe
Token: SeRestorePrivilege	2816	WMIC.exe
Token: SeShutdownPrivilege	2816	WMIC.exe
Token: SeDebugPrivilege	2816	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2816	WMIC.exe
Token: SeRemoteShutdownPrivilege	2816	WMIC.exe
Token: SeUndockPrivilege	2816	WMIC.exe
Token: SeManageVolumePrivilege	2816	WMIC.exe
Token: 33	2816	WMIC.exe
Token: 34	2816	WMIC.exe
Token: 35	2816	WMIC.exe
Token: SeBackupPrivilege	564	wbengine.exe
Token: SeRestorePrivilege	564	wbengine.exe
Token: SeSecurityPrivilege	564	wbengine.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 1904 wrote to memory of 2796	1904	0x000800000001aa1b-29.exe	31
PID 1904 wrote to memory of 2796	1904	0x000800000001aa1b-29.exe	31
PID 1904 wrote to memory of 2796	1904	0x000800000001aa1b-29.exe	31
PID 2796 wrote to memory of 264	2796	XXX555.exe	33
PID 2796 wrote to memory of 264	2796	XXX555.exe	33
PID 2796 wrote to memory of 264	2796	XXX555.exe	33
PID 264 wrote to memory of 2288	264	cmd.exe	35
PID 264 wrote to memory of 2288	264	cmd.exe	35
PID 264 wrote to memory of 2288	264	cmd.exe	35
PID 264 wrote to memory of 2816	264	cmd.exe	38
PID 264 wrote to memory of 2816	264	cmd.exe	38
PID 264 wrote to memory of 2816	264	cmd.exe	38
PID 2796 wrote to memory of 1908	2796	XXX555.exe	40
PID 2796 wrote to memory of 1908	2796	XXX555.exe	40
PID 2796 wrote to memory of 1908	2796	XXX555.exe	40
PID 1908 wrote to memory of 1308	1908	cmd.exe	42
PID 1908 wrote to memory of 1308	1908	cmd.exe	42
PID 1908 wrote to memory of 1308	1908	cmd.exe	42
PID 1908 wrote to memory of 2092	1908	cmd.exe	43
PID 1908 wrote to memory of 2092	1908	cmd.exe	43
PID 1908 wrote to memory of 2092	1908	cmd.exe	43
PID 2796 wrote to memory of 2140	2796	XXX555.exe	44
PID 2796 wrote to memory of 2140	2796	XXX555.exe	44
PID 2796 wrote to memory of 2140	2796	XXX555.exe	44
PID 2140 wrote to memory of 1260	2140	cmd.exe	46
PID 2140 wrote to memory of 1260	2140	cmd.exe	46
PID 2140 wrote to memory of 1260	2140	cmd.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\0x000800000001aa1b-29.exe
"C:\Users\Admin\AppData\Local\Temp\0x000800000001aa1b-29.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Users\Admin\AppData\Roaming\XXX555.exe
  "C:\Users\Admin\AppData\Roaming\XXX555.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:2796
- - 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:264
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2288
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2816
- - 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:1908
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1308
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2092
- - 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:1260

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2864

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:564

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2420

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1692

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

Direct Volume Access

T1006

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\XXX555.exe

Filesize
1.2MB

MD5
e4ea9a5aee8f1d7576d8237b52fe345c

SHA1
abf5a63f22b6d953a3cf8304f52cd2ceb1701055

SHA256
d2d89b20e8f6fed21b4d8747df80d8c43107853e9d820cb9d5aeb832a36d773b

SHA512
761f1ca9ea9dd5c2c0930d3681467924a1d4ab9cd64d02ddbe2d8555a021e96f9f8b260c3a80ea96d18115999f2289686b4644ee240864a0d3000620facf90e8

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

Filesize
171B

MD5
3e6c4d018bb590573ad262cc1715d7b9

SHA1
d1b9156f9c88feb4d8da5d6b18d7861622794960

SHA256
06442ae852bdef53ce2a12888f2204f0b2facd1fb43cbba94869adc97e6ad00a

SHA512
4bba042c7c071d1f63ac51c1e2c4ff440c5bf00f1836668cc7048f35332da9a7324b41394596c0da9fb77c8a6ececc722f955185dd0f983c2c236ea19bfb0b19

Download Submit
memory/1904-0-0x000007FEF5173000-0x000007FEF5174000-memory.dmp

Filesize
4KB

Download
memory/1904-1-0x0000000000A70000-0x0000000000BA6000-memory.dmp

Filesize
1.2MB

Download
memory/2796-7-0x00000000013B0000-0x00000000014E6000-memory.dmp

Filesize
1.2MB

Download
memory/2796-25-0x000007FEF4780000-0x000007FEF516C000-memory.dmp

Filesize
9.9MB

Download
memory/2796-465-0x000007FEF4783000-0x000007FEF4784000-memory.dmp

Filesize
4KB

Download
memory/2796-466-0x000007FEF4780000-0x000007FEF516C000-memory.dmp

Filesize
9.9MB

Download