chaos | 9b74a10d6efbf33d56285505ae702947ea333447bfc583537f14018569b62ea6

General

Target

TestServer.exe
Size

107KB
MD5

c133ce6541688d84cfb35186fa8ad88f
SHA1

67d7c34ce8548ffcd1ec4f8608beba7a06b1fb0b
SHA256

9b74a10d6efbf33d56285505ae702947ea333447bfc583537f14018569b62ea6
SHA512

81efaf9f3b580ec37d5237663cca2f0ef8d9683304ee9a679da6be2c30961adad8c7bb38b64b0f1fbd4163667927871e912e0b669de2796cb14c370ea5707d50
SSDEEP

384:N3Mg/bqo2W4fSpJpMDKw/+988Jrr91CvpQHACQIdQepRsva46eLrTH+33M3zJ1oL:3qo2apMDN/NUrr9Ip5epij

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

Processes:

resource	yara_rule
behavioral1/memory/2116-1-0x0000000001120000-0x0000000001140000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\svchost.exe	family_chaos
behavioral1/memory/1984-8-0x0000000000140000-0x0000000000160000-memory.dmp	family_chaos

Chaos 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

Processes:

bcdedit.exebcdedit.exe

pid process

1764 bcdedit.exe
2440 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

Processes:

wbadmin.exe

pid process

2704 wbadmin.exe

pid	process
1764	bcdedit.exe
2440	bcdedit.exe

pid	process
2704	wbadmin.exe

Drops startup file 3 IoCs

Processes:

svchost.exe

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\FORNATHAN.txt	svchost.exe

Executes dropped EXE 1 IoCs

Processes:

svchost.exe

pid process

1984 svchost.exe
Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

pid	process
1984	svchost.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Searches\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\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\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\Admin\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\Downloads\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\Public\Documents\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3692679935-4019334568-335155002-1000\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\Accessories\Accessibility\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\Admin\Contacts\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\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

svchost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\81sxoq8ps.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 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

Processes:

vssadmin.exe

pid process

1016 vssadmin.exe
Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

1620 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

svchost.exe

pid process

1984 svchost.exe
Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

TestServer.exesvchost.exe

pid process

2116 TestServer.exe
2116 TestServer.exe
2116 TestServer.exe
1984 svchost.exe
1984 svchost.exe
1984 svchost.exe
1984 svchost.exe

pid	process
1016	vssadmin.exe

pid	process
1620	NOTEPAD.EXE

pid	process
1984	svchost.exe

pid	process
2116	TestServer.exe
2116	TestServer.exe
2116	TestServer.exe
1984	svchost.exe
1984	svchost.exe
1984	svchost.exe
1984	svchost.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

TestServer.exesvchost.exevssvc.exeWMIC.exewbengine.exe

description	pid	process
Token: SeDebugPrivilege	2116	TestServer.exe
Token: SeDebugPrivilege	1984	svchost.exe
Token: SeBackupPrivilege	556	vssvc.exe
Token: SeRestorePrivilege	556	vssvc.exe
Token: SeAuditPrivilege	556	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1572	WMIC.exe
Token: SeSecurityPrivilege	1572	WMIC.exe
Token: SeTakeOwnershipPrivilege	1572	WMIC.exe
Token: SeLoadDriverPrivilege	1572	WMIC.exe
Token: SeSystemProfilePrivilege	1572	WMIC.exe
Token: SeSystemtimePrivilege	1572	WMIC.exe
Token: SeProfSingleProcessPrivilege	1572	WMIC.exe
Token: SeIncBasePriorityPrivilege	1572	WMIC.exe
Token: SeCreatePagefilePrivilege	1572	WMIC.exe
Token: SeBackupPrivilege	1572	WMIC.exe
Token: SeRestorePrivilege	1572	WMIC.exe
Token: SeShutdownPrivilege	1572	WMIC.exe
Token: SeDebugPrivilege	1572	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1572	WMIC.exe
Token: SeRemoteShutdownPrivilege	1572	WMIC.exe
Token: SeUndockPrivilege	1572	WMIC.exe
Token: SeManageVolumePrivilege	1572	WMIC.exe
Token: 33	1572	WMIC.exe
Token: 34	1572	WMIC.exe
Token: 35	1572	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1572	WMIC.exe
Token: SeSecurityPrivilege	1572	WMIC.exe
Token: SeTakeOwnershipPrivilege	1572	WMIC.exe
Token: SeLoadDriverPrivilege	1572	WMIC.exe
Token: SeSystemProfilePrivilege	1572	WMIC.exe
Token: SeSystemtimePrivilege	1572	WMIC.exe
Token: SeProfSingleProcessPrivilege	1572	WMIC.exe
Token: SeIncBasePriorityPrivilege	1572	WMIC.exe
Token: SeCreatePagefilePrivilege	1572	WMIC.exe
Token: SeBackupPrivilege	1572	WMIC.exe
Token: SeRestorePrivilege	1572	WMIC.exe
Token: SeShutdownPrivilege	1572	WMIC.exe
Token: SeDebugPrivilege	1572	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1572	WMIC.exe
Token: SeRemoteShutdownPrivilege	1572	WMIC.exe
Token: SeUndockPrivilege	1572	WMIC.exe
Token: SeManageVolumePrivilege	1572	WMIC.exe
Token: 33	1572	WMIC.exe
Token: 34	1572	WMIC.exe
Token: 35	1572	WMIC.exe
Token: SeBackupPrivilege	932	wbengine.exe
Token: SeRestorePrivilege	932	wbengine.exe
Token: SeSecurityPrivilege	932	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

TestServer.exesvchost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 2116 wrote to memory of 1984	2116	TestServer.exe	svchost.exe
PID 2116 wrote to memory of 1984	2116	TestServer.exe	svchost.exe
PID 2116 wrote to memory of 1984	2116	TestServer.exe	svchost.exe
PID 1984 wrote to memory of 1348	1984	svchost.exe	cmd.exe
PID 1984 wrote to memory of 1348	1984	svchost.exe	cmd.exe
PID 1984 wrote to memory of 1348	1984	svchost.exe	cmd.exe
PID 1348 wrote to memory of 1016	1348	cmd.exe	vssadmin.exe
PID 1348 wrote to memory of 1016	1348	cmd.exe	vssadmin.exe
PID 1348 wrote to memory of 1016	1348	cmd.exe	vssadmin.exe
PID 1348 wrote to memory of 1572	1348	cmd.exe	WMIC.exe
PID 1348 wrote to memory of 1572	1348	cmd.exe	WMIC.exe
PID 1348 wrote to memory of 1572	1348	cmd.exe	WMIC.exe
PID 1984 wrote to memory of 2764	1984	svchost.exe	cmd.exe
PID 1984 wrote to memory of 2764	1984	svchost.exe	cmd.exe
PID 1984 wrote to memory of 2764	1984	svchost.exe	cmd.exe
PID 2764 wrote to memory of 1764	2764	cmd.exe	bcdedit.exe
PID 2764 wrote to memory of 1764	2764	cmd.exe	bcdedit.exe
PID 2764 wrote to memory of 1764	2764	cmd.exe	bcdedit.exe
PID 2764 wrote to memory of 2440	2764	cmd.exe	bcdedit.exe
PID 2764 wrote to memory of 2440	2764	cmd.exe	bcdedit.exe
PID 2764 wrote to memory of 2440	2764	cmd.exe	bcdedit.exe
PID 1984 wrote to memory of 1708	1984	svchost.exe	cmd.exe
PID 1984 wrote to memory of 1708	1984	svchost.exe	cmd.exe
PID 1984 wrote to memory of 1708	1984	svchost.exe	cmd.exe
PID 1708 wrote to memory of 2704	1708	cmd.exe	wbadmin.exe
PID 1708 wrote to memory of 2704	1708	cmd.exe	wbadmin.exe
PID 1708 wrote to memory of 2704	1708	cmd.exe	wbadmin.exe
PID 1984 wrote to memory of 1620	1984	svchost.exe	NOTEPAD.EXE
PID 1984 wrote to memory of 1620	1984	svchost.exe	NOTEPAD.EXE
PID 1984 wrote to memory of 1620	1984	svchost.exe	NOTEPAD.EXE

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\TestServer.exe
"C:\Users\Admin\AppData\Local\Temp\TestServer.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2116
- 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:1984
- - 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:1348
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1016
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1572
- - 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:2764
  - - 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:2440
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1708
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2704
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\FORNATHAN.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1620

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:556

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:932

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2760

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Management Instrumentation

1

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

1

T1006

Indicator Removal

3

T1070

File Deletion

Modify Registry

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Defacement

1

T1491

Inhibit System Recovery

4

T1490

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Downloads

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

Filesize
107KB

MD5
c133ce6541688d84cfb35186fa8ad88f

SHA1
67d7c34ce8548ffcd1ec4f8608beba7a06b1fb0b

SHA256
9b74a10d6efbf33d56285505ae702947ea333447bfc583537f14018569b62ea6

SHA512
81efaf9f3b580ec37d5237663cca2f0ef8d9683304ee9a679da6be2c30961adad8c7bb38b64b0f1fbd4163667927871e912e0b669de2796cb14c370ea5707d50

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

Filesize
1KB

MD5
fe77eea33bfab77e62aa9c84307322d7

SHA1
a0ae02f0e7fef9da285a2ef350fb389309761171

SHA256
728c388adb493e26c58db0970a59573e7cb136e5463076324bd978d8b6bf0e2f

SHA512
9ced19eaaffdbae688137b2d26ef5de30e5310acb2dc1801607437154fad690aeed5c08971a1395495dc72175178ce7b18a5a73ab272ca1e34abd316091da295

Download Submit
memory/1984-8-0x0000000000140000-0x0000000000160000-memory.dmp

Filesize
128KB

Download
memory/1984-13-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1984-21-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1984-491-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1984-492-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/2116-0-0x000007FEF5A63000-0x000007FEF5A64000-memory.dmp

Filesize
4KB

Download
memory/2116-1-0x0000000001120000-0x0000000001140000-memory.dmp

Filesize
128KB

Download
memory/2116-2-0x000007FEF5A63000-0x000007FEF5A64000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads