chaos | 400c24bdb9b7dabfcd9a8a2f137550f338014d833d169c6e6f4252910fb95feb

Analysis

max time kernel
103s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-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 2 IoCs

resource	yara_rule
behavioral6/memory/5552-1-0x0000000000BD0000-0x0000000000BDC000-memory.dmp	family_chaos
behavioral6/files/0x00090000000227aa-7.dat	family_chaos

Chaos family
chaos
Renames multiple (205) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\Control Panel\International\Geo\Nation	a261b01eacf8494cec58f0a20d573d35.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000\Control Panel\International\Geo\Nation	svchost.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ezzzzzzzzzzzzzzzzzz.txt	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
512	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-1-5-21-3975168204-1612096350-4002976354-1000\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\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\Start Menu\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\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\Local\Microsoft\Windows\Burn\Burn\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\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group1\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group2\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\AccountPictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn1\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Application Shortcuts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\3D Objects\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Libraries\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
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\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\StartUp\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Burn\Burn2\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3975168204-1612096350-4002976354-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\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\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\System Tools\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group2\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group3\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\Public\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\WinX\Group3\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Local\Microsoft\Windows\WinX\Group1\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3975168204-1612096350-4002976354-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
5092	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
5552	a261b01eacf8494cec58f0a20d573d35.exe
512	svchost.exe

Suspicious behavior: EnumeratesProcesses 46 IoCs

pid	Process
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
5552	a261b01eacf8494cec58f0a20d573d35.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe
512	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5552	a261b01eacf8494cec58f0a20d573d35.exe
Token: SeDebugPrivilege	512	svchost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5552 wrote to memory of 512	5552	a261b01eacf8494cec58f0a20d573d35.exe	88
PID 5552 wrote to memory of 512	5552	a261b01eacf8494cec58f0a20d573d35.exe	88
PID 512 wrote to memory of 5092	512	svchost.exe	90
PID 512 wrote to memory of 5092	512	svchost.exe	90

C:\Users\Admin\AppData\Local\Temp\a261b01eacf8494cec58f0a20d573d35.exe
"C:\Users\Admin\AppData\Local\Temp\a261b01eacf8494cec58f0a20d573d35.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5552
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops desktop.ini file(s)
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:512
- - 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:5092

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

Query Registry

T1012

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\Setup\{AC76BA86-7AD7-1033-7B44-AC0F074E4100}\ezzzzzzzzzzzzzzzzzz.txt

Filesize
37B

MD5
5028d7db4667363bcb21ff4d7982df6d

SHA1
58a7b76dd001a5cb9b9a01ad81c0bea0f9324048

SHA256
79b003488f2e7d5ce72f00027aae9e6d1f2f598ccd37b3599a59aa5b3cf1a64f

SHA512
d7e11531b2d515689f5332de45b144882ec14ac9c861a6813ff1c8d4f36d58bc02da69f019f2f97159e5f771911ce0114ee5310adafd03eacbe1f469dd653984

Download Submit
C:\Users\Admin\2012_x86_0_vcRuntimeMinimum_x86.log

Filesize
1B

MD5
d1457b72c3fb323a2671125aef3eab5d

SHA1
5bab61eb53176449e25c2c82f172b82cb13ffb9d

SHA256
8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

SHA512
ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\a261b01eacf8494cec58f0a20d573d35.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

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

Filesize
26KB

MD5
a261b01eacf8494cec58f0a20d573d35

SHA1
b0fd7110500b3b8e78514dc7c024b5e4c0d2329c

SHA256
33139f448f54b18034b40fa25ff8b8e068d790f40d038c37cf6a410be948fc3e

SHA512
a6fa275542ab0eb1e036f9a62f7ac6f613cfce813fe72c30223b69b5c404ab713d357529fe4bb7c1ce9999aa92e3aebd78ff31282387b277f622cca339e8c03e

Download Submit
memory/512-16-0x00007FFB30CE0000-0x00007FFB317A1000-memory.dmp

Filesize
10.8MB

Download
memory/512-1442-0x00007FFB30CE0000-0x00007FFB317A1000-memory.dmp

Filesize
10.8MB

Download
memory/5552-0-0x00007FFB30CE3000-0x00007FFB30CE5000-memory.dmp

Filesize
8KB

Download
memory/5552-1-0x0000000000BD0000-0x0000000000BDC000-memory.dmp

Filesize
48KB

Download
memory/5552-2-0x00007FFB30CE0000-0x00007FFB317A1000-memory.dmp

Filesize
10.8MB

Download
memory/5552-15-0x00007FFB30CE0000-0x00007FFB317A1000-memory.dmp

Filesize
10.8MB

Download