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
839s
max time network
843s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
13-07-2024 09:52

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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 3 IoCs

resource	yara_rule
behavioral20/memory/2132-1-0x0000000000A80000-0x0000000000ACE000-memory.dmp	family_chaos
behavioral20/files/0x00090000000120fb-5.dat	family_chaos
behavioral20/memory/1708-8-0x00000000008F0000-0x000000000093E000-memory.dmp	family_chaos

Drops startup file 3 IoCs

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

pid	Process
1708	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

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Music\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\Windows\Start Menu\Programs\Maintenance\Desktop.ini	System.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\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\Public\Videos\desktop.ini	System.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	System.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	System.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Pictures\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\System Tools\Desktop.ini	System.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	System.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1506706701-1246725540-2219210854-1000\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Downloads\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\Libraries\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	System.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Saved Games\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\SendTo\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	System.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\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\Windows\Recent\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\Music\desktop.ini	System.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
2916	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1708	System.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2132	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
2132	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
2132	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
1708	System.exe
1708	System.exe
1708	System.exe
1708	System.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2132	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
Token: SeDebugPrivilege	1708	System.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2132 wrote to memory of 1708	2132	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe	30
PID 2132 wrote to memory of 1708	2132	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe	30
PID 2132 wrote to memory of 1708	2132	942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe	30
PID 1708 wrote to memory of 2916	1708	System.exe	31
PID 1708 wrote to memory of 2916	1708	System.exe	31
PID 1708 wrote to memory of 2916	1708	System.exe	31

C:\Users\Admin\AppData\Local\Temp\942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe
"C:\Users\Admin\AppData\Local\Temp\942bc9e43e40e01694365aced2331634257727783353c7d49d940abcc215a17c.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2132
- C:\Users\Admin\AppData\Roaming\System.exe
  "C:\Users\Admin\AppData\Roaming\System.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:1708
- - 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:2916

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

Replay Monitor

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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/1708-7-0x000007FEF51A3000-0x000007FEF51A4000-memory.dmp

Filesize
4KB

Download
memory/1708-8-0x00000000008F0000-0x000000000093E000-memory.dmp

Filesize
312KB

Download
memory/1708-71-0x000007FEF51A0000-0x000007FEF5B8C000-memory.dmp

Filesize
9.9MB

Download
memory/1708-72-0x000007FEF51A3000-0x000007FEF51A4000-memory.dmp

Filesize
4KB

Download
memory/1708-73-0x000007FEF51A0000-0x000007FEF5B8C000-memory.dmp

Filesize
9.9MB

Download
memory/2132-0-0x000007FEF5B93000-0x000007FEF5B94000-memory.dmp

Filesize
4KB

Download
memory/2132-1-0x0000000000A80000-0x0000000000ACE000-memory.dmp

Filesize
312KB

Download