chaos | 400c24bdb9b7dabfcd9a8a2f137550f338014d833d169c6e6f4252910fb95feb

Analysis

max time kernel
121s
max time network
126s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:15

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General

Target

a261b01eacf8494cec58f0a20d573d35.exe
Size

26KB
MD5

a261b01eacf8494cec58f0a20d573d35
SHA1

b0fd7110500b3b8e78514dc7c024b5e4c0d2329c
SHA256

33139f448f54b18034b40fa25ff8b8e068d790f40d038c37cf6a410be948fc3e
SHA512

a6fa275542ab0eb1e036f9a62f7ac6f613cfce813fe72c30223b69b5c404ab713d357529fe4bb7c1ce9999aa92e3aebd78ff31282387b277f622cca339e8c03e
SSDEEP

384:AftWZPzzxAm1vmHZVJ2s3HlMDwX9YNlIOy5o91ih082vX:L7zxAmyZTnce9Dho9QO82v

Score

10^/10

chaos persistence ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral5/memory/2388-1-0x0000000000870000-0x000000000087C000-memory.dmp	family_chaos
behavioral5/files/0x000b000000012280-6.dat	family_chaos
behavioral5/memory/2344-8-0x00000000003D0000-0x00000000003DC000-memory.dmp	family_chaos

Chaos family
chaos
Renames multiple (184) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Drops startup file 2 IoCs

description	ioc	Process
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\ezzzzzzzzzzzzzzzzzz.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2344	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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\UpdateTask = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe

Drops desktop.ini file(s) 64 IoCs

description	ioc	Process
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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\Start Menu\Programs\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\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\4JFE2I4S\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\AppData\Local\Microsoft\Feeds Cache\SMFN3Z3Q\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\3D87ST3G\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\JEDNWX6E\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\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\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\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1163522206-1469769407-485553996-1000\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\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6SLTOM5C\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Recorded TV\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Recorded TV\Sample Media\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\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\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows Mail\Stationery\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\DQFI3FMT\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\IJMS2YBB\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\4FXYHFK9\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	svchost.exe

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

System Information Discovery
T1082

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1800	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2344	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2388	a261b01eacf8494cec58f0a20d573d35.exe
2388	a261b01eacf8494cec58f0a20d573d35.exe
2388	a261b01eacf8494cec58f0a20d573d35.exe
2344	svchost.exe
2344	svchost.exe
2344	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2388	a261b01eacf8494cec58f0a20d573d35.exe
Token: SeDebugPrivilege	2344	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2388 wrote to memory of 2344	2388	a261b01eacf8494cec58f0a20d573d35.exe	30
PID 2388 wrote to memory of 2344	2388	a261b01eacf8494cec58f0a20d573d35.exe	30
PID 2388 wrote to memory of 2344	2388	a261b01eacf8494cec58f0a20d573d35.exe	30
PID 2344 wrote to memory of 1800	2344	svchost.exe	33
PID 2344 wrote to memory of 1800	2344	svchost.exe	33
PID 2344 wrote to memory of 1800	2344	svchost.exe	33

C:\Users\Admin\AppData\Local\Temp\a261b01eacf8494cec58f0a20d573d35.exe
"C:\Users\Admin\AppData\Local\Temp\a261b01eacf8494cec58f0a20d573d35.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2388
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops desktop.ini file(s)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2344
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\ezzzzzzzzzzzzzzzzzz.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:1800

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Adobe\Updater6\ezzzzzzzzzzzzzzzzzz.txt

Filesize
37B

MD5
5028d7db4667363bcb21ff4d7982df6d

SHA1
58a7b76dd001a5cb9b9a01ad81c0bea0f9324048

SHA256
79b003488f2e7d5ce72f00027aae9e6d1f2f598ccd37b3599a59aa5b3cf1a64f

SHA512
d7e11531b2d515689f5332de45b144882ec14ac9c861a6813ff1c8d4f36d58bc02da69f019f2f97159e5f771911ce0114ee5310adafd03eacbe1f469dd653984

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

Filesize
26KB

MD5
a261b01eacf8494cec58f0a20d573d35

SHA1
b0fd7110500b3b8e78514dc7c024b5e4c0d2329c

SHA256
33139f448f54b18034b40fa25ff8b8e068d790f40d038c37cf6a410be948fc3e

SHA512
a6fa275542ab0eb1e036f9a62f7ac6f613cfce813fe72c30223b69b5c404ab713d357529fe4bb7c1ce9999aa92e3aebd78ff31282387b277f622cca339e8c03e

Download Submit
C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Notepad.lnk

Filesize
1B

MD5
d1457b72c3fb323a2671125aef3eab5d

SHA1
5bab61eb53176449e25c2c82f172b82cb13ffb9d

SHA256
8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

SHA512
ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

Download Submit
memory/2344-8-0x00000000003D0000-0x00000000003DC000-memory.dmp

Filesize
48KB

Download
memory/2344-9-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download
memory/2344-10-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download
memory/2344-934-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download
memory/2388-0-0x000007FEF53F3000-0x000007FEF53F4000-memory.dmp

Filesize
4KB

Download
memory/2388-1-0x0000000000870000-0x000000000087C000-memory.dmp

Filesize
48KB

Download
memory/2388-2-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download
memory/2388-932-0x000007FEF53F0000-0x000007FEF5DDC000-memory.dmp

Filesize
9.9MB

Download