chaos | 965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca

Analysis

max time kernel
43s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
18/10/2022, 01:20

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General

Target

965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca.exe
Size

27KB
MD5

e17a9ca3daf0d53d72ef4e1a8142b57b
SHA1

467e882bb8381a22100b6f573b02725520bab3b6
SHA256

965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca
SHA512

a62903017bb718e5b0a601900b4b9e0f9e6b507ca28670da2bd4e3c31491000bdd29453d814de5b1b0b16c0623352d2861ecf9247272791e58a26189df1f827d
SSDEEP

384:ltWZPzzxAm1vqQ1HPEWx0OeuBbholQOy5o914R99SP82vW:M7zxAmL1HP70Oeu1rho9Gxm82+

Score

10^/10

chaos persistence ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Entschlüsseln.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 4 IoCs

resource	yara_rule
behavioral1/memory/1640-54-0x0000000000B30000-0x0000000000B3E000-memory.dmp	family_chaos
behavioral1/files/0x000c0000000054a8-56.dat	family_chaos
behavioral1/files/0x000c0000000054a8-57.dat	family_chaos
behavioral1/memory/1484-58-0x0000000000120000-0x000000000012E000-memory.dmp	family_chaos

Executes dropped EXE 1 IoCs

pid	Process
1484	svchost.exe

Modifies extensions of user files 2 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\SyncSwitch.png.cwwn	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\SyncSwitch.png.cwwn	svchost.exe

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\Entschlüsseln.txt	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
T1081

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\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\Start Menu\Programs\Maintenance\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\Favorites\Links for United States\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\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\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\Recorded TV\Sample Media\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\Sample Music\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\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\All Users\Microsoft\Windows\Start Menu\Programs\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\Admin\AppData\Local\Microsoft\Feeds Cache\NWV1K27G\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\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\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\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\INLM2B61\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\QAI10AFD\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\Recorded TV\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Libraries\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\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\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Contacts\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Tablet PC\Desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\Programs\Games\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\Feeds Cache\8PENRVY0\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\History\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\6THCX874\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\Public\Pictures\Sample Pictures\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\All Users\Microsoft\Windows\Start Menu\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\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\All Users\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Default\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\OF1EYD7L\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Feeds Cache\RUC7JGOV\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ZTOVLSHV\desktop.ini	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1484	svchost.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1640	965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca.exe
1484	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1640	965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca.exe
Token: SeDebugPrivilege	1484	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1640 wrote to memory of 1484	1640	965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca.exe	28
PID 1640 wrote to memory of 1484	1640	965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca.exe	28
PID 1640 wrote to memory of 1484	1640	965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca.exe	28
PID 1484 wrote to memory of 840	1484	svchost.exe	30
PID 1484 wrote to memory of 840	1484	svchost.exe	30
PID 1484 wrote to memory of 840	1484	svchost.exe	30

C:\Users\Admin\AppData\Local\Temp\965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca.exe
"C:\Users\Admin\AppData\Local\Temp\965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Modifies extensions of user files
  - Drops startup file
  - 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:1484
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Entschlüsseln.txt
    3⤵
    PID:840

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

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\Entschlüsseln.txt

Filesize
582B

MD5
ed5cc52876db869de48a4783069c2a5e

SHA1
a9d51ceaeff715ace430f9462ab2ee4e7f33e70e

SHA256
45726f2f29967ef016f8d556fb6468a577307d67388cc4530295a9ca10fdfa36

SHA512
1745aefb9b4db4cdd7c08ee3a7d133db08f35a336fd18b598211519b481ef25ac84a3e8a3da3db06caef9f531288d1cf0ca8d4b2560637945e7953e8b45421f5

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

Filesize
27KB

MD5
e17a9ca3daf0d53d72ef4e1a8142b57b

SHA1
467e882bb8381a22100b6f573b02725520bab3b6

SHA256
965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca

SHA512
a62903017bb718e5b0a601900b4b9e0f9e6b507ca28670da2bd4e3c31491000bdd29453d814de5b1b0b16c0623352d2861ecf9247272791e58a26189df1f827d

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

Filesize
27KB

MD5
e17a9ca3daf0d53d72ef4e1a8142b57b

SHA1
467e882bb8381a22100b6f573b02725520bab3b6

SHA256
965c22cf88a29074e71fc6a6492f15c680ad8e83f6d7bf1eebb3da6efc4768ca

SHA512
a62903017bb718e5b0a601900b4b9e0f9e6b507ca28670da2bd4e3c31491000bdd29453d814de5b1b0b16c0623352d2861ecf9247272791e58a26189df1f827d

Download Submit
memory/840-60-0x000007FEFB931000-0x000007FEFB933000-memory.dmp

Filesize
8KB

Download
memory/1484-58-0x0000000000120000-0x000000000012E000-memory.dmp

Filesize
56KB

Download
memory/1640-54-0x0000000000B30000-0x0000000000B3E000-memory.dmp

Filesize
56KB

Download