chaos | bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369

Analysis

max time kernel
44s
max time network
31s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
30/03/2023, 21:37

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General

Target

bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369.exe
Size

205KB
MD5

62e53bc5aa5f2a70a54e328bff51505f
SHA1

e7deceee97a09d539d81eb91f988ece5e2a2ff51
SHA256

bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369
SHA512

a676dd284188271be1760ed1edd3320341713662aba1c615481f256007e614e58756a7b6a565beed777230c2ae829c561e3bf3510921ad6495d3776cfdfaa793
SSDEEP

6144:+B4mr9NzqHW7V5V9w/UIRZizI1aqebq/lsyp:+B40qHW7nU/pZmiXqy

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/1096-54-0x0000000000850000-0x0000000000888000-memory.dmp	family_chaos
behavioral1/files/0x000a00000001230b-58.dat	family_chaos
behavioral1/files/0x000a00000001230b-59.dat	family_chaos
behavioral1/memory/240-60-0x00000000009A0000-0x00000000009D8000-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
1992	bcdedit.exe
996	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
1156	wbadmin.exe

Modifies extensions of user files 5 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\CompressCheckpoint.tif => C:\Users\Admin\Pictures\CompressCheckpoint.tif.skull	svchost.exe
File renamed	C:\Users\Admin\Pictures\JoinSet.png => C:\Users\Admin\Pictures\JoinSet.png.skull	svchost.exe
File renamed	C:\Users\Admin\Pictures\RegisterSend.png => C:\Users\Admin\Pictures\RegisterSend.png.skull	svchost.exe
File renamed	C:\Users\Admin\Pictures\RequestRead.raw => C:\Users\Admin\Pictures\RequestRead.raw.skull	svchost.exe
File renamed	C:\Users\Admin\Pictures\RestoreRequest.png => C:\Users\Admin\Pictures\RestoreRequest.png.skull	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\read_it.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
240	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\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\Internet Explorer\Quick Launch\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\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\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\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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\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\SendTo\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\Desktop\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\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\Music\desktop.ini	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
1088	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1704	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
240	svchost.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1096	bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369.exe
240	svchost.exe
240	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1096	bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369.exe
Token: SeDebugPrivilege	240	svchost.exe
Token: SeBackupPrivilege	456	vssvc.exe
Token: SeRestorePrivilege	456	vssvc.exe
Token: SeAuditPrivilege	456	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	1688	wbengine.exe
Token: SeRestorePrivilege	1688	wbengine.exe
Token: SeSecurityPrivilege	1688	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1096 wrote to memory of 240	1096	bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369.exe	28
PID 1096 wrote to memory of 240	1096	bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369.exe	28
PID 1096 wrote to memory of 240	1096	bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369.exe	28
PID 240 wrote to memory of 848	240	svchost.exe	30
PID 240 wrote to memory of 848	240	svchost.exe	30
PID 240 wrote to memory of 848	240	svchost.exe	30
PID 848 wrote to memory of 1088	848	cmd.exe	32
PID 848 wrote to memory of 1088	848	cmd.exe	32
PID 848 wrote to memory of 1088	848	cmd.exe	32
PID 848 wrote to memory of 1856	848	cmd.exe	36
PID 848 wrote to memory of 1856	848	cmd.exe	36
PID 848 wrote to memory of 1856	848	cmd.exe	36
PID 240 wrote to memory of 1716	240	svchost.exe	38
PID 240 wrote to memory of 1716	240	svchost.exe	38
PID 240 wrote to memory of 1716	240	svchost.exe	38
PID 1716 wrote to memory of 1992	1716	cmd.exe	40
PID 1716 wrote to memory of 1992	1716	cmd.exe	40
PID 1716 wrote to memory of 1992	1716	cmd.exe	40
PID 1716 wrote to memory of 996	1716	cmd.exe	41
PID 1716 wrote to memory of 996	1716	cmd.exe	41
PID 1716 wrote to memory of 996	1716	cmd.exe	41
PID 240 wrote to memory of 580	240	svchost.exe	42
PID 240 wrote to memory of 580	240	svchost.exe	42
PID 240 wrote to memory of 580	240	svchost.exe	42
PID 580 wrote to memory of 1156	580	cmd.exe	44
PID 580 wrote to memory of 1156	580	cmd.exe	44
PID 580 wrote to memory of 1156	580	cmd.exe	44
PID 240 wrote to memory of 1704	240	svchost.exe	48
PID 240 wrote to memory of 1704	240	svchost.exe	48
PID 240 wrote to memory of 1704	240	svchost.exe	48

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\bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369.exe
"C:\Users\Admin\AppData\Local\Temp\bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1096
- 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)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:240
- - 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:848
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1088
  - - 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:1716
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1992
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:996
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:580
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1156
- - 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:1704

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:456

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1688

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:524

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:528

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

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

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\read_it.txt

Filesize
844B

MD5
a23e76ce33adf72409fb0c43393d3087

SHA1
502620245be1d0912ab9c4fb5390ab14e27778a8

SHA256
88702c38b8bea9555a13ae747cbfdf2947fff6060f4fef75486025e0152ddf3a

SHA512
24fdd6761b29eb62ecfefa7a5ed15705645c3a303ada3728823382ba38e08eae12f15840fb65361391cff1ba4cad55fdfb6e0144c9e95b7e7fbe928319d732bb

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

Filesize
205KB

MD5
62e53bc5aa5f2a70a54e328bff51505f

SHA1
e7deceee97a09d539d81eb91f988ece5e2a2ff51

SHA256
bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369

SHA512
a676dd284188271be1760ed1edd3320341713662aba1c615481f256007e614e58756a7b6a565beed777230c2ae829c561e3bf3510921ad6495d3776cfdfaa793

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

Filesize
205KB

MD5
62e53bc5aa5f2a70a54e328bff51505f

SHA1
e7deceee97a09d539d81eb91f988ece5e2a2ff51

SHA256
bb5ca9d8de51734dbd14dc081c7c892d819cd14fafd7ccd62849d70f9e679369

SHA512
a676dd284188271be1760ed1edd3320341713662aba1c615481f256007e614e58756a7b6a565beed777230c2ae829c561e3bf3510921ad6495d3776cfdfaa793

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

Filesize
844B

MD5
a23e76ce33adf72409fb0c43393d3087

SHA1
502620245be1d0912ab9c4fb5390ab14e27778a8

SHA256
88702c38b8bea9555a13ae747cbfdf2947fff6060f4fef75486025e0152ddf3a

SHA512
24fdd6761b29eb62ecfefa7a5ed15705645c3a303ada3728823382ba38e08eae12f15840fb65361391cff1ba4cad55fdfb6e0144c9e95b7e7fbe928319d732bb

Download Submit
memory/240-60-0x00000000009A0000-0x00000000009D8000-memory.dmp

Filesize
224KB

Download
memory/240-75-0x000000001B010000-0x000000001B090000-memory.dmp

Filesize
512KB

Download
memory/240-511-0x000000001B010000-0x000000001B090000-memory.dmp

Filesize
512KB

Download
memory/1096-54-0x0000000000850000-0x0000000000888000-memory.dmp

Filesize
224KB

Download