chaos | 0d9fcb8894240750cb5e4222ea78572aba6618eb5297c2069588ceb979d52d8b

Resubmissions

13-07-2024 09:54

240713-lxcvgawdmn 10

13-07-2024 09:52

240713-lv46yawdkj 10

13-07-2024 09:46

240713-lrz3tayajc 10

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
13-07-2024 09:46

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General

Target

942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
Size

286KB
MD5

ca1c3c08b1291ee31fb47f039ad08129
SHA1

629446ad19eb04f6edb8c576bf007facf4ff249c
SHA256

942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c
SHA512

e1b49a9738d44666dd93f248844e6bfb331db16c171f05af8333852a99e9c335c527effab61e8de796bed9d9199dfccc9c8f0199fc0eb5998eec9e758bb272fa
SSDEEP

384:123MLWHn3kIt/F6Y0p9dpTWJpr91CznHZN0eNQ6Jki2xC5:En3kIX6rp9j+pr9inHD0eNh5

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

Processes:

resource	yara_rule
behavioral20/memory/1672-1-0x00000000007D0000-0x000000000081E000-memory.dmp	family_chaos
C:\Users\Admin\AppData\Roaming\System.exe	family_chaos

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

Processes:

System.exe942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000\Control Panel\International\Geo\Nation	System.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000\Control Panel\International\Geo\Nation	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe

Drops startup file 3 IoCs

Processes:

System.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.url	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	System.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt	System.exe

Executes dropped EXE 1 IoCs

Processes:

System.exe

pid process

216 System.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

pid	process
216	System.exe

Drops desktop.ini file(s) 34 IoCs

Processes:

System.exe

description	ioc	process
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2636447293-1148739154-93880854-1000\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	System.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	System.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	System.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	System.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini	System.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	System.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

Processes:

System.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000_Classes\Local Settings System.exe
Opens file in notepad (likely ransom note) 1 IoCs
ransomware

Processes:

NOTEPAD.EXE

pid process

1300 NOTEPAD.EXE
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

System.exe

pid process

216 System.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000_Classes\Local Settings	System.exe

pid	process
1300	NOTEPAD.EXE

pid	process
216	System.exe

Suspicious behavior: EnumeratesProcesses 43 IoCs

Processes:

942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exeSystem.exe

pid	process
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe
216	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exeSystem.exe

description	pid	process
Token: SeDebugPrivilege	1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
Token: SeDebugPrivilege	216	System.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exeSystem.exe

description	pid	process	target process
PID 1672 wrote to memory of 216	1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe	System.exe
PID 1672 wrote to memory of 216	1672	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe	System.exe
PID 216 wrote to memory of 1300	216	System.exe	NOTEPAD.EXE
PID 216 wrote to memory of 1300	216	System.exe	NOTEPAD.EXE

C:\Users\Admin\AppData\Local\Temp\942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
"C:\Users\Admin\AppData\Local\Temp\942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Users\Admin\AppData\Roaming\System.exe
  "C:\Users\Admin\AppData\Roaming\System.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:216
- - 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:1300

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

Query Registry

T1012

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\Roaming\System.exe

Filesize
286KB

MD5
ca1c3c08b1291ee31fb47f039ad08129

SHA1
629446ad19eb04f6edb8c576bf007facf4ff249c

SHA256
942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c

SHA512
e1b49a9738d44666dd93f248844e6bfb331db16c171f05af8333852a99e9c335c527effab61e8de796bed9d9199dfccc9c8f0199fc0eb5998eec9e758bb272fa

Download Submit
C:\Users\Admin\Desktop\read_it.txt

Filesize
603B

MD5
7084f8453d19df9736848d0eda34e816

SHA1
d8b277bc3cc06a58245a466a0d76868116e304a9

SHA256
77b2af47c97fd92eef615ec57e655439bf27b2a7dc650438d53577b86f245d25

SHA512
614513c17d07d4cf0f108ab66215e40b3eb2fb06caf5892c00d90d1e0f247ec11f34da73c6040a38b3b5f292bd486bb188e90479cb7ecb1920560c62855e6288

Download Submit
memory/216-14-0x00007FFCD8280000-0x00007FFCD8D41000-memory.dmp

Filesize
10.8MB

Download
memory/216-68-0x00007FFCD8280000-0x00007FFCD8D41000-memory.dmp

Filesize
10.8MB

Download
memory/216-70-0x00007FFCD8280000-0x00007FFCD8D41000-memory.dmp

Filesize
10.8MB

Download
memory/1672-0-0x00007FFCD8283000-0x00007FFCD8285000-memory.dmp

Filesize
8KB

Download
memory/1672-1-0x00000000007D0000-0x000000000081E000-memory.dmp

Filesize
312KB

Download