chaos | 1c46cde332afed277986eaae2d50dc288ecd052735235b35962adb21202bb354

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-01-2025 13:46

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General

Target

ransomware DO NOT EXECUTE.exe
Size

248KB
MD5

fe3ac4694dfe15762f09f902f1bf5fd3
SHA1

a3ee731f0e44167c63429f776b30ed1c38204e92
SHA256

1c46cde332afed277986eaae2d50dc288ecd052735235b35962adb21202bb354
SHA512

0669f7328281de827a2bc975f174a985e6b4fbbc4b0cf599b6fea29f92d4633d6c7285049f9c52d39706282a5c1a3c34f2b1fd21e8515ef7fe2dd7a8711045ee
SSDEEP

1536:Oo2ylT90mr9xV46YE63xzqPTosYCXb2CmVjstPYDkuH:OotB90mr9xV41E6lOomaRg2Dk

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2180-1-0x0000000000A70000-0x0000000000AB4000-memory.dmp	family_chaos
behavioral1/files/0x000d00000001226d-5.dat	family_chaos
behavioral1/memory/1804-8-0x0000000000B50000-0x0000000000B94000-memory.dmp	family_chaos

Chaos family
chaos
Renames multiple (204) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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_me.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1804	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

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Videos\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\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\Saved Games\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\Favorites\Links for United States\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1846800975-3917212583-2893086201-1000\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
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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 2 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ufxhn0fhp.jpg"	svchost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Pictures\\My Wallpaper.jpg"	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
600	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1804	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2180	ransomware DO NOT EXECUTE.exe
2180	ransomware DO NOT EXECUTE.exe
2180	ransomware DO NOT EXECUTE.exe
1804	svchost.exe
1804	svchost.exe
1804	svchost.exe
1804	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2180	ransomware DO NOT EXECUTE.exe
Token: SeDebugPrivilege	1804	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 1804	2180	ransomware DO NOT EXECUTE.exe	30
PID 2180 wrote to memory of 1804	2180	ransomware DO NOT EXECUTE.exe	30
PID 2180 wrote to memory of 1804	2180	ransomware DO NOT EXECUTE.exe	30
PID 1804 wrote to memory of 600	1804	svchost.exe	32
PID 1804 wrote to memory of 600	1804	svchost.exe	32
PID 1804 wrote to memory of 600	1804	svchost.exe	32

C:\Users\Admin\AppData\Local\Temp\ransomware DO NOT EXECUTE.exe
"C:\Users\Admin\AppData\Local\Temp\ransomware DO NOT EXECUTE.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2180
- 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:1804
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_me.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

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

Defacement

T1491

Replay Monitor

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Downloads

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

Filesize
248KB

MD5
fe3ac4694dfe15762f09f902f1bf5fd3

SHA1
a3ee731f0e44167c63429f776b30ed1c38204e92

SHA256
1c46cde332afed277986eaae2d50dc288ecd052735235b35962adb21202bb354

SHA512
0669f7328281de827a2bc975f174a985e6b4fbbc4b0cf599b6fea29f92d4633d6c7285049f9c52d39706282a5c1a3c34f2b1fd21e8515ef7fe2dd7a8711045ee

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

Filesize
129B

MD5
14a5d7b2bc70cb7f275fe6ae9de82684

SHA1
b1a5b5b11928c9c9738f8afdef08bb3a06006f80

SHA256
1ad306c2004f7187a16363e7e45c574f097aa11bd58a2110d3a92e4461443b10

SHA512
aada99b09cc843af8f846d81f79ade118426729fee4a0018c017ca873933c5082412da8458b1e4dbb1ae151b01617a01336461acaf64ea30303250094e93e857

Download Submit
memory/1804-7-0x000007FEF5133000-0x000007FEF5134000-memory.dmp

Filesize
4KB

Download
memory/1804-8-0x0000000000B50000-0x0000000000B94000-memory.dmp

Filesize
272KB

Download
memory/1804-32-0x000007FEF5130000-0x000007FEF5B1C000-memory.dmp

Filesize
9.9MB

Download
memory/1804-473-0x000007FEF5133000-0x000007FEF5134000-memory.dmp

Filesize
4KB

Download
memory/1804-474-0x000007FEF5130000-0x000007FEF5B1C000-memory.dmp

Filesize
9.9MB

Download
memory/2180-0-0x000007FEF5B23000-0x000007FEF5B24000-memory.dmp

Filesize
4KB

Download
memory/2180-1-0x0000000000A70000-0x0000000000AB4000-memory.dmp

Filesize
272KB

Download