chaos | b1968b4be3f82fc26b1e2decdcb8f532915aed847603aeeaf254722bdd411d26

Resubmissions

16-03-2024 17:17

240316-vtswysfd2y 10

16-03-2024 15:31

240316-syg9xafg39 10

15-03-2024 08:15

240315-j5rmgsbg5z 10

Analysis

max time kernel
120s
max time network
125s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
15-03-2024 08:15

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General

Target

9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e.exe
Size

27KB
MD5

cc4c6842f8a31ee3ac6477b42d34acba
SHA1

ce6e9918189e9187143e0e012356bec98988c035
SHA256

9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e
SHA512

25b31b5065d3a625ce11d922cdcc6293c021aaf3ebd9460b5fd317e548c5cf6e6a173ec0062cb129b0f1f9262d6403bd585f697aca71aff86d7c577cfe6ddf93
SSDEEP

384:atWZPzzxAm1vp5Z+HxbEWx0OeuBbIzlXOy5o91Sk5n82vt:f7zxAmpwb70Oeu1who91h82V

Score

10^/10

chaos persistence ransomware spyware stealer

Malware Config

Extracted

Path

C:\ProgramData\Adobe\Updater6\read_it.txt

Ransom Note

Don't worry, you can return all your files! All your files like documents, photos, databases and other important are encrypted What guarantees do we give to you? You can send 3 of your encrypted files and we decrypt it for free. You must follow these steps To decrypt your files : 1) Write on our e-mail :[email protected] ( In case of no answer in 24 hours check your spam folder or write us to this e-mail: [email protected]) 2) Obtain Bitcoin (You have to pay for decryption in Bitcoins. After payment we will send you the tool that will decrypt all your files.)

Emails

[email protected]

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral24/memory/2656-0-0x00000000013E0000-0x00000000013EE000-memory.dmp	family_chaos
behavioral24/files/0x000e000000014698-6.dat	family_chaos
behavioral24/memory/2640-8-0x0000000001240000-0x000000000124E000-memory.dmp	family_chaos

Drops startup file 2 IoCs

description	ioc	Process
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
2640	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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-330940541-141609230-1670313778-1000\Software\Microsoft\Windows\CurrentVersion\Run\UpdateTask = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe

Drops desktop.ini file(s) 64 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\BB0Z8TKM\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Libraries\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\All Users\Microsoft\Windows\Start Menu\Programs\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\JP38OXIN\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\1OEGTYQG\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\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\Local\Microsoft\Windows Mail\Stationery\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-330940541-141609230-1670313778-1000\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\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\2Y0HPGOE\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\AS4I30IR\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Recorded TV\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Recorded TV\Sample Media\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\History\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\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\Accessories\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\Documents\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\Local\Microsoft\Windows\Burn\Burn\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\History\History.IE5\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\266EQP1S\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\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\WZPJ6IGS\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Ringtones\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\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
1116	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2640	svchost.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2656	9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e.exe
2656	9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e.exe
2640	svchost.exe
2640	svchost.exe
2640	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2656	9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e.exe
Token: SeDebugPrivilege	2640	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 2640	2656	9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e.exe	28
PID 2656 wrote to memory of 2640	2656	9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e.exe	28
PID 2656 wrote to memory of 2640	2656	9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e.exe	28
PID 2640 wrote to memory of 1116	2640	svchost.exe	30
PID 2640 wrote to memory of 1116	2640	svchost.exe	30
PID 2640 wrote to memory of 1116	2640	svchost.exe	30

C:\Users\Admin\AppData\Local\Temp\9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e.exe
"C:\Users\Admin\AppData\Local\Temp\9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops desktop.ini file(s)
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2640
- - 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:1116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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

Replay Monitor

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Downloads

C:\ProgramData\Adobe\Updater6\read_it.txt

Filesize
595B

MD5
7cff3b94ef1413349cdf9d4742f9cd77

SHA1
0569d834acc4a41e0b47bc1d03dcf27430106096

SHA256
bb6cdcdbb8d8b17243cce8bc7c9d7eee1872b63313640e5d63c63619712ddd8d

SHA512
1425864a3944742df1f4f849455c3224e2ee281b4c19dbc46af180efaaa1fb35dc14ef047faa02ba92e3d8b5a33ad60cc65c7b4ea9e1182a5b91d01e9edd2873

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

Filesize
27KB

MD5
cc4c6842f8a31ee3ac6477b42d34acba

SHA1
ce6e9918189e9187143e0e012356bec98988c035

SHA256
9b0cfabed9fbf6b05c74e5a31eb500fea0691c84fa736dd25e8e5013a35f038e

SHA512
25b31b5065d3a625ce11d922cdcc6293c021aaf3ebd9460b5fd317e548c5cf6e6a173ec0062cb129b0f1f9262d6403bd585f697aca71aff86d7c577cfe6ddf93

Download Submit
C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Notepad.lnk

Filesize
1B

MD5
d1457b72c3fb323a2671125aef3eab5d

SHA1
5bab61eb53176449e25c2c82f172b82cb13ffb9d

SHA256
8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

SHA512
ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

Download Submit
memory/2640-8-0x0000000001240000-0x000000000124E000-memory.dmp

Filesize
56KB

Download
memory/2640-10-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/2640-11-0x000000001AED0000-0x000000001AF50000-memory.dmp

Filesize
512KB

Download
memory/2640-857-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/2656-0-0x00000000013E0000-0x00000000013EE000-memory.dmp

Filesize
56KB

Download
memory/2656-1-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/2656-2-0x000000001AD10000-0x000000001AD90000-memory.dmp

Filesize
512KB

Download
memory/2656-9-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download