chaos | d79af425babcfd32113326f513cc09a87fc1e5fa879f268810b50a3bd46dae16

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
28-05-2024 17:26

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General

Target

2024-05-28_446197af0bdf0f6e238341584386ce86_chaos_destroyer_wannacry.exe
Size

21KB
MD5

446197af0bdf0f6e238341584386ce86
SHA1

1dd0189ab56f75234ae25a4ff143eb1d1af4a085
SHA256

d79af425babcfd32113326f513cc09a87fc1e5fa879f268810b50a3bd46dae16
SHA512

813453baf7700060fae475c5eb194eba8b00e06457ded915b6188e0c48520447bc92af267a3fb1890f1077be214a313915a5219cb35bd3bae162589fed04f1e2
SSDEEP

384:83MLWHn3kIsW4oa5i3Jk6pBd8cT+Jar91Czbpey:Un3kIh3C6pBCcmar9itey

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/2996-1-0x0000000000060000-0x000000000006C000-memory.dmp	family_chaos
behavioral1/files/0x000b00000000e610-5.dat	family_chaos
behavioral1/memory/2644-7-0x0000000000840000-0x000000000084C000-memory.dmp	family_chaos

Detects command variations typically used by ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2996-1-0x0000000000060000-0x000000000006C000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/files/0x000b00000000e610-5.dat	INDICATOR_SUSPICIOUS_GENRansomware
behavioral1/memory/2644-7-0x0000000000840000-0x000000000084C000-memory.dmp	INDICATOR_SUSPICIOUS_GENRansomware

Drops startup file 3 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2644	brul.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\Searches\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	brul.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	brul.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	brul.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	brul.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	brul.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	brul.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	brul.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3627615824-4061627003-3019543961-1000\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	brul.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	brul.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	brul.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	brul.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
2588	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2644	brul.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2996	2024-05-28_446197af0bdf0f6e238341584386ce86_chaos_destroyer_wannacry.exe
2996	2024-05-28_446197af0bdf0f6e238341584386ce86_chaos_destroyer_wannacry.exe
2644	brul.exe
2644	brul.exe
2644	brul.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2996	2024-05-28_446197af0bdf0f6e238341584386ce86_chaos_destroyer_wannacry.exe
Token: SeDebugPrivilege	2644	brul.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2996 wrote to memory of 2644	2996	2024-05-28_446197af0bdf0f6e238341584386ce86_chaos_destroyer_wannacry.exe	28
PID 2996 wrote to memory of 2644	2996	2024-05-28_446197af0bdf0f6e238341584386ce86_chaos_destroyer_wannacry.exe	28
PID 2996 wrote to memory of 2644	2996	2024-05-28_446197af0bdf0f6e238341584386ce86_chaos_destroyer_wannacry.exe	28
PID 2644 wrote to memory of 2588	2644	brul.exe	29
PID 2644 wrote to memory of 2588	2644	brul.exe	29
PID 2644 wrote to memory of 2588	2644	brul.exe	29

C:\Users\Admin\AppData\Local\Temp\2024-05-28_446197af0bdf0f6e238341584386ce86_chaos_destroyer_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-28_446197af0bdf0f6e238341584386ce86_chaos_destroyer_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2996
- C:\Users\Admin\AppData\Roaming\brul.exe
  "C:\Users\Admin\AppData\Roaming\brul.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:2644
- - 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:2588

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\Roaming\brul.exe

Filesize
21KB

MD5
446197af0bdf0f6e238341584386ce86

SHA1
1dd0189ab56f75234ae25a4ff143eb1d1af4a085

SHA256
d79af425babcfd32113326f513cc09a87fc1e5fa879f268810b50a3bd46dae16

SHA512
813453baf7700060fae475c5eb194eba8b00e06457ded915b6188e0c48520447bc92af267a3fb1890f1077be214a313915a5219cb35bd3bae162589fed04f1e2

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

Filesize
31B

MD5
29278002ffa1adb6b3e290b9bbbc361e

SHA1
c8d07e852ebd35ab2ab848d07f808b31fdbb4d53

SHA256
54b196a423af5b6e6204289a67ed8ce6de2c7dd12f39f57df8370618188304b6

SHA512
f4b1180c533d7b887fed3337cd7519dc1ad93defdf3f46775c520c7ecc983969fa7ea00f035412ed0263cf7277697a5dd1daea6414cf19456e28d52d19f1f596

Download Submit
memory/2644-7-0x0000000000840000-0x000000000084C000-memory.dmp

Filesize
48KB

Download
memory/2644-8-0x000007FEF50F0000-0x000007FEF5ADC000-memory.dmp

Filesize
9.9MB

Download
memory/2644-69-0x000007FEF50F0000-0x000007FEF5ADC000-memory.dmp

Filesize
9.9MB

Download
memory/2644-70-0x000007FEF50F0000-0x000007FEF5ADC000-memory.dmp

Filesize
9.9MB

Download
memory/2644-71-0x000007FEF50F0000-0x000007FEF5ADC000-memory.dmp

Filesize
9.9MB

Download
memory/2996-0-0x000007FEF50F3000-0x000007FEF50F4000-memory.dmp

Filesize
4KB

Download
memory/2996-1-0x0000000000060000-0x000000000006C000-memory.dmp

Filesize
48KB

Download