chaos | d418ca84ca4bb7db72d2b00f8d6225a57909e02f712c7b0e2d9cefb2e18d0737

Resubmissions

13-07-2024 09:54

240713-lxbx6swdmm 10

13-07-2024 09:50

240713-lvbvdsyapd 10

13-07-2024 09:46

240713-lr1dksyajd 10

Analysis

max time kernel
837s
max time network
839s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
13-07-2024 09:50

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General

Target

24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe
Size

88KB
MD5

e60df2922d5ceb45856f405e41a9d6cc
SHA1

2e438348f4ec2fbd82ce944ad3697d58771ac170
SHA256

24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d
SHA512

21eac0c509698b0b257e0f8b304204b0f29bbca8f0fafbb33aee5d93af727859ec6e2977c45c658248858cbe362ee5438c37bf566c269e4b708a89f22c87cca3
SSDEEP

768:/qo23p8xAcr9G5eH2SU2Ip4jBqltCF0AxEjenoB69+Fx:yo2iAcr9GYH2SFHBWAxEjc+

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
behavioral6/memory/1868-1-0x0000000000C50000-0x0000000000C6C000-memory.dmp	family_chaos
behavioral6/files/0x0005000000010300-5.dat	family_chaos
behavioral6/memory/2868-7-0x0000000000E80000-0x0000000000E9C000-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
2504	bcdedit.exe
796	bcdedit.exe

Renames multiple (208) 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
1992	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\readme.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2868	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\Desktop\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\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\Admin\Favorites\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\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\Accessories\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\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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	F:\$RECYCLE.BIN\S-1-5-21-3551809350-4263495960-1443967649-1000\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\Accessories\System Tools\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	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\Favorites\Links\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\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\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\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
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\desktop.ini	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 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
2928	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1008	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2868	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1868	24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe
1868	24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe
1868	24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe
2868	svchost.exe
2868	svchost.exe
2868	svchost.exe
2868	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	1868	24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe
Token: SeDebugPrivilege	2868	svchost.exe
Token: SeBackupPrivilege	1476	vssvc.exe
Token: SeRestorePrivilege	1476	vssvc.exe
Token: SeAuditPrivilege	1476	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	2268	wbengine.exe
Token: SeRestorePrivilege	2268	wbengine.exe
Token: SeSecurityPrivilege	2268	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 2868	1868	24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe	30
PID 1868 wrote to memory of 2868	1868	24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe	30
PID 1868 wrote to memory of 2868	1868	24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe	30
PID 2868 wrote to memory of 1784	2868	svchost.exe	32
PID 2868 wrote to memory of 1784	2868	svchost.exe	32
PID 2868 wrote to memory of 1784	2868	svchost.exe	32
PID 1784 wrote to memory of 2928	1784	cmd.exe	34
PID 1784 wrote to memory of 2928	1784	cmd.exe	34
PID 1784 wrote to memory of 2928	1784	cmd.exe	34
PID 1784 wrote to memory of 2176	1784	cmd.exe	37
PID 1784 wrote to memory of 2176	1784	cmd.exe	37
PID 1784 wrote to memory of 2176	1784	cmd.exe	37
PID 2868 wrote to memory of 1388	2868	svchost.exe	39
PID 2868 wrote to memory of 1388	2868	svchost.exe	39
PID 2868 wrote to memory of 1388	2868	svchost.exe	39
PID 1388 wrote to memory of 2504	1388	cmd.exe	41
PID 1388 wrote to memory of 2504	1388	cmd.exe	41
PID 1388 wrote to memory of 2504	1388	cmd.exe	41
PID 1388 wrote to memory of 796	1388	cmd.exe	42
PID 1388 wrote to memory of 796	1388	cmd.exe	42
PID 1388 wrote to memory of 796	1388	cmd.exe	42
PID 2868 wrote to memory of 1672	2868	svchost.exe	43
PID 2868 wrote to memory of 1672	2868	svchost.exe	43
PID 2868 wrote to memory of 1672	2868	svchost.exe	43
PID 1672 wrote to memory of 1992	1672	cmd.exe	45
PID 1672 wrote to memory of 1992	1672	cmd.exe	45
PID 1672 wrote to memory of 1992	1672	cmd.exe	45
PID 2868 wrote to memory of 1008	2868	svchost.exe	49
PID 2868 wrote to memory of 1008	2868	svchost.exe	49
PID 2868 wrote to memory of 1008	2868	svchost.exe	49

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\24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe
"C:\Users\Admin\AppData\Local\Temp\24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1868
- 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)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2868
- - 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:1784
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2928
  - - 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:1388
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:2504
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:796
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1672
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1992
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\readme.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1008

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1476

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2268

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1772

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1920

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

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

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

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

Filesize
88KB

MD5
e60df2922d5ceb45856f405e41a9d6cc

SHA1
2e438348f4ec2fbd82ce944ad3697d58771ac170

SHA256
24cb5e44b68c9dd2a115de3415ee96e78d2180dfd287133c54dfa29c90c1088d

SHA512
21eac0c509698b0b257e0f8b304204b0f29bbca8f0fafbb33aee5d93af727859ec6e2977c45c658248858cbe362ee5438c37bf566c269e4b708a89f22c87cca3

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

Filesize
383B

MD5
83ed0a180949592c8f79f789175ea653

SHA1
19871ab2de4d5f8e0864c7b76ea0fdff036d9e45

SHA256
2a01b766122215da2478d0d8eb3cf23b19d111cbd49454794effabd1f20f47ca

SHA512
7c0c772951faebcd16b13247fbd7e4cbf2bfc28a63e579e2ea07f9a0c3dcc33adb927e0bc613f8a3bf5e02940a34c6ed2f525d85e33d6be231437d89a051233b

Download Submit
memory/1868-0-0x000007FEF6003000-0x000007FEF6004000-memory.dmp

Filesize
4KB

Download
memory/1868-1-0x0000000000C50000-0x0000000000C6C000-memory.dmp

Filesize
112KB

Download
memory/2868-7-0x0000000000E80000-0x0000000000E9C000-memory.dmp

Filesize
112KB

Download
memory/2868-9-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

Filesize
9.9MB

Download
memory/2868-10-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

Filesize
9.9MB

Download
memory/2868-479-0x000007FEF6000000-0x000007FEF69EC000-memory.dmp

Filesize
9.9MB

Download