chaos | 4494b5ea65a0e3f79d85579866d94cd65f2d42182fbe051ffe286692d07f94f4

Resubmissions

08-03-2024 11:13

240308-nbr4daee4y 10

07-03-2024 08:19

240307-j78nsage2v 10

07-03-2024 06:01

240307-gq7n2seh58 10

Analysis

max time kernel
120s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
07-03-2024 06:01

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General

Target

mhh.exe
Size

21KB
MD5

777642d092240d5237da22123428a3ec
SHA1

d9c614c189c9d0050b841229fb63c4e2552163c0
SHA256

4494b5ea65a0e3f79d85579866d94cd65f2d42182fbe051ffe286692d07f94f4
SHA512

cb052654d4965da94545ce14aa122c36e8dcb46ee714e5cec6341af392381b155792d1c0d6f2490158c52aeeaa72b65dba1cfd9bd784523f489df0ec5583a42a
SSDEEP

384:9+3MLWHn3kIUf16NveXpjr9VsjuJJ/r91CruUem:9Cn3kIi6NEpjr9yj6/r9Srem

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/2968-0-0x0000000000090000-0x000000000009C000-memory.dmp	family_chaos
behavioral1/memory/2848-7-0x0000000000FD0000-0x0000000000FDC000-memory.dmp	family_chaos
behavioral1/files/0x000a000000012272-6.dat	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
2848	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\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\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\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\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\Searches\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\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\Start Menu\Programs\Administrative Tools\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\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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\Windows\Start Menu\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\AppData\Roaming\Microsoft\Windows\Libraries\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\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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\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	F:\$RECYCLE.BIN\S-1-5-21-778096762-2241304387-192235952-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	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
2436	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2848	svchost.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2968	mhh.exe
2968	mhh.exe
2848	svchost.exe
2848	svchost.exe
2848	svchost.exe
2848	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2968	mhh.exe
Token: SeDebugPrivilege	2848	svchost.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2436	NOTEPAD.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 2848	2968	mhh.exe	28
PID 2968 wrote to memory of 2848	2968	mhh.exe	28
PID 2968 wrote to memory of 2848	2968	mhh.exe	28
PID 2848 wrote to memory of 2436	2848	svchost.exe	30
PID 2848 wrote to memory of 2436	2848	svchost.exe	30
PID 2848 wrote to memory of 2436	2848	svchost.exe	30

C:\Users\Admin\AppData\Local\Temp\mhh.exe
"C:\Users\Admin\AppData\Local\Temp\mhh.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2968
- 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)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2848
- - 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)
    - Suspicious use of FindShellTrayWindow
    PID:2436

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\svchost.exe

Filesize
21KB

MD5
777642d092240d5237da22123428a3ec

SHA1
d9c614c189c9d0050b841229fb63c4e2552163c0

SHA256
4494b5ea65a0e3f79d85579866d94cd65f2d42182fbe051ffe286692d07f94f4

SHA512
cb052654d4965da94545ce14aa122c36e8dcb46ee714e5cec6341af392381b155792d1c0d6f2490158c52aeeaa72b65dba1cfd9bd784523f489df0ec5583a42a

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

Filesize
104B

MD5
7ce89e17fe514cd4e316f22cb21d341e

SHA1
a4bbe08d6a0f4b5089b96051b76e8ee563202390

SHA256
341aaae527b38ee958efa8dc5ea799ae948cd9267f4c0b1525d771cc5f088c44

SHA512
abcb28dc211da1c8e5a5001160ba74daebeb3a7556c53679e8bc53aef60dea391423823fdc0f1742d5cc2e337e9c3b71444c7d660d4920678daf3a81fb4c71ec

Download Submit
memory/2848-7-0x0000000000FD0000-0x0000000000FDC000-memory.dmp

Filesize
48KB

Download
memory/2848-9-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2848-70-0x000000001B0C0000-0x000000001B140000-memory.dmp

Filesize
512KB

Download
memory/2848-72-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2848-73-0x000000001B0C0000-0x000000001B140000-memory.dmp

Filesize
512KB

Download
memory/2968-0-0x0000000000090000-0x000000000009C000-memory.dmp

Filesize
48KB

Download
memory/2968-1-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download
memory/2968-8-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp

Filesize
9.9MB

Download