chaos | 053406e3796af92592f6af6ab78ce2372f9521b3c9286314274bf85ce4221ba8

Analysis

max time kernel
24s
max time network
18s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
06-08-2024 03:53

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General

Target

ab8c3898f405f749d76f1f4d0b2edea7.exe
Size

497KB
MD5

ab8c3898f405f749d76f1f4d0b2edea7
SHA1

cd84e0d07ba9d0bb0533f22d769aa89c57df65ed
SHA256

053406e3796af92592f6af6ab78ce2372f9521b3c9286314274bf85ce4221ba8
SHA512

339e09fdc912f84c47f7243a1caecbaf4139e1e0643726a03f1f4c80c217d74bdff01bd5a6c6ef4b725992fc1b5961420400e6d67b3e47498c31dd909fb44c2f
SSDEEP

6144:yHr9B5aj/BXUAHi8tbQxBDVC8NfjPiU0Ci/d+EmlXZCW+WWWpw4X3KSahv:Oaj/BXUA3tcbeU9CW+WWWZov

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/2716-1-0x0000000000A50000-0x0000000000AD2000-memory.dmp	family_chaos
behavioral1/files/0x00070000000120fe-5.dat	family_chaos
behavioral1/memory/2680-8-0x0000000000A30000-0x0000000000AB2000-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\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
2680	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) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Favorites\Links\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\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\Searches\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\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2257386474-3982792636-3902186748-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Windows\SendTo\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\Public\Videos\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\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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\Documents\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\Public\Documents\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\Links\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\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

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2257386474-3982792636-3902186748-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\6hwiqnpll.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
2192	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2680	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2716	ab8c3898f405f749d76f1f4d0b2edea7.exe
2716	ab8c3898f405f749d76f1f4d0b2edea7.exe
2716	ab8c3898f405f749d76f1f4d0b2edea7.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe
2680	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2716	ab8c3898f405f749d76f1f4d0b2edea7.exe
Token: SeDebugPrivilege	2680	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2716 wrote to memory of 2680	2716	ab8c3898f405f749d76f1f4d0b2edea7.exe	30
PID 2716 wrote to memory of 2680	2716	ab8c3898f405f749d76f1f4d0b2edea7.exe	30
PID 2716 wrote to memory of 2680	2716	ab8c3898f405f749d76f1f4d0b2edea7.exe	30
PID 2680 wrote to memory of 2192	2680	svchost.exe	32
PID 2680 wrote to memory of 2192	2680	svchost.exe	32
PID 2680 wrote to memory of 2192	2680	svchost.exe	32

C:\Users\Admin\AppData\Local\Temp\ab8c3898f405f749d76f1f4d0b2edea7.exe
"C:\Users\Admin\AppData\Local\Temp\ab8c3898f405f749d76f1f4d0b2edea7.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2716
- 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:2680
- - 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:2192

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

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

Defacement

T1491

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Downloads

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

Filesize
497KB

MD5
ab8c3898f405f749d76f1f4d0b2edea7

SHA1
cd84e0d07ba9d0bb0533f22d769aa89c57df65ed

SHA256
053406e3796af92592f6af6ab78ce2372f9521b3c9286314274bf85ce4221ba8

SHA512
339e09fdc912f84c47f7243a1caecbaf4139e1e0643726a03f1f4c80c217d74bdff01bd5a6c6ef4b725992fc1b5961420400e6d67b3e47498c31dd909fb44c2f

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

Filesize
96B

MD5
2506efed38776621a5ec3517e03ce4ae

SHA1
039e00bcf8cb8b8a0c50b707896ab8f9be238ebe

SHA256
e5eb55c1910b0cccddda06bb50a143e08b66a831dea2fd12efe9c9ff1fe3894c

SHA512
ca966cc3e3f8a99fe4a27ba225d47ee96e04ef224f32daea67084b3a5d727fcef36f1dea8d536eda6faa6ccc5a1e2febdabc030c5c02fc4aadff3104c248393d

Download Submit
memory/2680-7-0x000007FEF56C3000-0x000007FEF56C4000-memory.dmp

Filesize
4KB

Download
memory/2680-8-0x0000000000A30000-0x0000000000AB2000-memory.dmp

Filesize
520KB

Download
memory/2680-26-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

Filesize
9.9MB

Download
memory/2680-501-0x000007FEF56C3000-0x000007FEF56C4000-memory.dmp

Filesize
4KB

Download
memory/2680-502-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

Filesize
9.9MB

Download
memory/2716-0-0x000007FEF60B3000-0x000007FEF60B4000-memory.dmp

Filesize
4KB

Download
memory/2716-1-0x0000000000A50000-0x0000000000AD2000-memory.dmp

Filesize
520KB

Download