chaos | 250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6

Analysis

max time kernel
121s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
01/02/2024, 07:11

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General

Target

250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe
Size

26KB
MD5

a8765ab3d92873157aa9dbef4e52aea8
SHA1

a114f2798f45fc6ef2c72f54852b39e1c6b87d6a
SHA256

250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6
SHA512

6aabea4ff31539eddfd926faf7074d18495a1981cdcca18d32462edeae31545593879e875f419079befea48bf8407f0059bb2fada57b4ac24d563ccb9bd384ab
SSDEEP

384:5YenjLLAps4T5lBavzb/xlhKOVp91Q0b5hxDGU:4OElB6sc9G0bXxDv

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\read_it.txt

Family

chaos

Ransom Note

----> Chaos is multi language ransomware. Translate your note to any language <---- All of your files have been encrypted Your computer was infected with a ransomware virus. Your files have been encrypted and you won't be able to decrypt them without our help.What can I do to get my files back?You can buy our special decryption software, this software will allow you to recover all of your data and remove the ransomware from your computer.The price for the software is $1,500. Payment can be made in Bitcoin only. How do I pay, where do I get Bitcoin? Purchasing Bitcoin varies from country to country, you are best advised to do a quick google search yourself to find out how to buy Bitcoin. Many of our customers have reported these sites to be fast and reliable: Coinmama - hxxps://www.coinmama.com Bitpanda - hxxps://www.bitpanda.com Payment informationAmount: 0.1473766 BTC Bitcoin Address: bc1qlnzcep4l4ac0ttdrq7awxev9ehu465f2vpt9x0

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2392-0-0x00000000002C0000-0x00000000002CC000-memory.dmp	family_chaos
behavioral1/files/0x0009000000012247-5.dat	family_chaos
behavioral1/memory/2140-7-0x0000000000DE0000-0x0000000000DEC000-memory.dmp	family_chaos

Detects command variations typically used by ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2392-0-0x00000000002C0000-0x00000000002CC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x0009000000012247-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2140-7-0x0000000000DE0000-0x0000000000DEC000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Renames multiple (174) 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_it.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
2140	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) 64 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-928733405-3780110381-2966456290-1000\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Recorded TV\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\Links\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\Favorites\Links\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\Desktop\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\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\09F2SWIH\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\Downloads\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\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\Feeds Cache\2XAN2K6J\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\Contacts\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\History\History.IE5\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
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\Public\Pictures\Sample Pictures\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\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\Windows PowerShell\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\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\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\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\Public\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\5XFO03YO\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\All Users\Microsoft\Windows\Ringtones\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\Start Menu\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\Music\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\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\HM43VO8I\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\VY6ISOME\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\Public\Videos\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\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\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\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\M3JKPX3I\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
796	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2140	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2392	250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe
2392	250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe
2392	250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe
2140	svchost.exe
2140	svchost.exe
2140	svchost.exe
2140	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2392	250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe
Token: SeDebugPrivilege	2140	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2392 wrote to memory of 2140	2392	250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe	28
PID 2392 wrote to memory of 2140	2392	250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe	28
PID 2392 wrote to memory of 2140	2392	250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe	28
PID 2140 wrote to memory of 796	2140	svchost.exe	30
PID 2140 wrote to memory of 796	2140	svchost.exe	30
PID 2140 wrote to memory of 796	2140	svchost.exe	30

C:\Users\Admin\AppData\Local\Temp\250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe
"C:\Users\Admin\AppData\Local\Temp\250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2392
- 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:2140
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:796

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

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

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Downloads

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad\read_it.txt

Filesize
964B

MD5
4217b8b83ce3c3f70029a056546f8fd0

SHA1
487cdb5733d073a0427418888e8f7070fe782a03

SHA256
7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121

SHA512
2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

Download Submit
C:\Users\Admin\AppData\Roaming\SyncAssert.avi

Filesize
1B

MD5
d1457b72c3fb323a2671125aef3eab5d

SHA1
5bab61eb53176449e25c2c82f172b82cb13ffb9d

SHA256
8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

SHA512
ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

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

Filesize
26KB

MD5
a8765ab3d92873157aa9dbef4e52aea8

SHA1
a114f2798f45fc6ef2c72f54852b39e1c6b87d6a

SHA256
250316d71e654dbaa1b01f726caaa9aaa5a94dac91c65c9013536e2b5386e8a6

SHA512
6aabea4ff31539eddfd926faf7074d18495a1981cdcca18d32462edeae31545593879e875f419079befea48bf8407f0059bb2fada57b4ac24d563ccb9bd384ab

Download Submit
memory/2140-7-0x0000000000DE0000-0x0000000000DEC000-memory.dmp

Filesize
48KB

Download
memory/2140-10-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/2140-59-0x000000001A920000-0x000000001A9A0000-memory.dmp

Filesize
512KB

Download
memory/2140-884-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/2140-885-0x000000001A920000-0x000000001A9A0000-memory.dmp

Filesize
512KB

Download
memory/2392-0-0x00000000002C0000-0x00000000002CC000-memory.dmp

Filesize
48KB

Download
memory/2392-1-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/2392-8-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download