chaos | 053406e3796af92592f6af6ab78ce2372f9521b3c9286314274bf85ce4221ba8

Analysis

max time kernel
92s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
06/08/2024, 03:53

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General

Target
ab8c3898f405f749d76f1f4d0b2edea7.exe
Size 497KB
Sample240806-efnr3ssgph
SHA256 053406e3796af92592f6af6ab78ce2372f9521b3c9286314274bf85ce4221ba8
MD5 ab8c3898f405f749d76f1f4d0b2edea7
SHA1 cd84e0d07ba9d0bb0533f22d769aa89c57df65ed
SHA512 339e09fdc912f84c47f7243a1caecbaf4139e1e0643726a03f1f4c80c217d74bdff01bd5a6c6ef4b725992fc1b5961420400e6d67b3e47498c31dd909fb44c2f
SSDEEP 6144:yHr9B5aj/BXUAHi8tbQxBDVC8NfjPiU0Ci/d+EmlXZCW+WWWpw4X3KSahv:Oaj/BXUA3tcbeU9CW+WWWZov
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

resource	yara_rule
behavioral2/memory/3720-1-0x0000000000190000-0x0000000000212000-memory.dmp	family_chaos
behavioral2/files/0x000b0000000233b9-6.dat	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	ab8c3898f405f749d76f1f4d0b2edea7.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	svchost.exe

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
4392	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\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Saved Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2718105630-359604950-2820636825-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\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\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\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\AppData\Roaming\Microsoft\Windows\Start Menu\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\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\SendTo\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\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-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\53wstchot.jpg"	svchost.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

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
228	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4392	svchost.exe

Suspicious behavior: EnumeratesProcesses 45 IoCs

pid	Process
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe
4392	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3720	ab8c3898f405f749d76f1f4d0b2edea7.exe
Token: SeDebugPrivilege	4392	svchost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3720 wrote to memory of 4392	3720	ab8c3898f405f749d76f1f4d0b2edea7.exe	88
PID 3720 wrote to memory of 4392	3720	ab8c3898f405f749d76f1f4d0b2edea7.exe	88
PID 4392 wrote to memory of 228	4392	svchost.exe	90
PID 4392 wrote to memory of 228	4392	svchost.exe	90

C:\Users\Admin\AppData\Local\Temp\ab8c3898f405f749d76f1f4d0b2edea7.exe
"C:\Users\Admin\AppData\Local\Temp\ab8c3898f405f749d76f1f4d0b2edea7.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3720
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Sets desktop wallpaper using registry
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4392
- - 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:228

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

Query Registry

T1012

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

svchost.exe

Path C:\Users\Admin\AppData\Roaming\svchost.exe
Size 497KB
SHA256 053406e3796af92592f6af6ab78ce2372f9521b3c9286314274bf85ce4221ba8
MD5 ab8c3898f405f749d76f1f4d0b2edea7
SHA1 cd84e0d07ba9d0bb0533f22d769aa89c57df65ed
SHA512 339e09fdc912f84c47f7243a1caecbaf4139e1e0643726a03f1f4c80c217d74bdff01bd5a6c6ef4b725992fc1b5961420400e6d67b3e47498c31dd909fb44c2f
SSDEEP 6144:yHr9B5aj/BXUAHi8tbQxBDVC8NfjPiU0Ci/d+EmlXZCW+WWWpw4X3KSahv:Oaj/BXUA3tcbeU9CW+WWWZov
MD5 SHA1 SHA512 SSDEEP

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read_it.txt

Path C:\Users\Admin\Documents\read_it.txt
Size 96B
SHA256 e5eb55c1910b0cccddda06bb50a143e08b66a831dea2fd12efe9c9ff1fe3894c
MD5 2506efed38776621a5ec3517e03ce4ae
SHA1 039e00bcf8cb8b8a0c50b707896ab8f9be238ebe
SHA512 ca966cc3e3f8a99fe4a27ba225d47ee96e04ef224f32daea67084b3a5d727fcef36f1dea8d536eda6faa6ccc5a1e2febdabc030c5c02fc4aadff3104c248393d
MD5 SHA1 SHA512

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memory/3720-0-0x00007FFB17773000-0x00007FFB17775000-memory.dmp

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memory/3720-1-0x0000000000190000-0x0000000000212000-memory.dmp

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memory/4392-14-0x00007FFB17770000-0x00007FFB18231000-memory.dmp

Download

memory/4392-483-0x00007FFB17770000-0x00007FFB18231000-memory.dmp

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