chaos | 6b65f08038aca6ffc04a1aa0a260c16d744e18d42c69884b1f34db57fa839318

Analysis

max time kernel
29s
max time network
34s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
27/05/2023, 02:34

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General

Target

2023-05-25_544f4dd222b91ea9febe67fc264512e1_destroyer_wannacry.exe
Size

22KB
MD5

544f4dd222b91ea9febe67fc264512e1
SHA1

138d3cab4d5a39c95d1c711f4cf6a5f7b5abd533
SHA256

6b65f08038aca6ffc04a1aa0a260c16d744e18d42c69884b1f34db57fa839318
SHA512

eedc437982c73acdca4e661eb3fe804223d3f5fde894a935973afa8bf86f313f80e028699edbb4ddfcda7df069326e928dd42112feda1c84e0abc3a9fe00d3b8
SSDEEP

384:c3Mg/bqo2xxDIZEpGOjuwzU/Jnr91CZxkEMwe1:iqo2TD5p7jKxnr90Re1

Score

10^/10

chaos ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 4 IoCs

resource	yara_rule
behavioral1/memory/1772-54-0x0000000001060000-0x000000000106C000-memory.dmp	family_chaos
behavioral1/files/0x000400000000b46e-58.dat	family_chaos
behavioral1/files/0x000400000000b46e-59.dat	family_chaos
behavioral1/memory/1564-60-0x0000000000DC0000-0x0000000000DCC000-memory.dmp	family_chaos

Renames multiple (197) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Modifies extensions of user files 2 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\SplitTest.png => C:\Users\Admin\Pictures\SplitTest.png.encrypted	svchost.exe
File renamed	C:\Users\Admin\Pictures\UninstallPing.tif => C:\Users\Admin\Pictures\UninstallPing.tif.encrypted	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\Unlock_my _files.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
1564	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

Drops desktop.ini file(s) 33 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Searches\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\Sample Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Desktop\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\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\Maintenance\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\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\Admin\Videos\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\Libraries\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\Sample 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\SendTo\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\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe

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

System Information Discovery
T1082

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1564	svchost.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1772	2023-05-25_544f4dd222b91ea9febe67fc264512e1_destroyer_wannacry.exe
1564	svchost.exe
1564	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1772	2023-05-25_544f4dd222b91ea9febe67fc264512e1_destroyer_wannacry.exe
Token: SeDebugPrivilege	1564	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1772 wrote to memory of 1564	1772	2023-05-25_544f4dd222b91ea9febe67fc264512e1_destroyer_wannacry.exe	28
PID 1772 wrote to memory of 1564	1772	2023-05-25_544f4dd222b91ea9febe67fc264512e1_destroyer_wannacry.exe	28
PID 1772 wrote to memory of 1564	1772	2023-05-25_544f4dd222b91ea9febe67fc264512e1_destroyer_wannacry.exe	28
PID 1564 wrote to memory of 1876	1564	svchost.exe	30
PID 1564 wrote to memory of 1876	1564	svchost.exe	30
PID 1564 wrote to memory of 1876	1564	svchost.exe	30

C:\Users\Admin\AppData\Local\Temp\2023-05-25_544f4dd222b91ea9febe67fc264512e1_destroyer_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2023-05-25_544f4dd222b91ea9febe67fc264512e1_destroyer_wannacry.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1772
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Modifies extensions of user files
  - 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:1564
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Unlock_my _files.txt
    3⤵
    PID:1876

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

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\Unlock_my _files.txt

Filesize
406B

MD5
c6038adaa663b784401790743085bde6

SHA1
53804359eb625eb6f23a49beb3e1fbe7ae70333a

SHA256
82958ca8eee775895536280411b49234ebd5f15ac51b69907deceb20a13c3f38

SHA512
cd660f1805b4a1a73f1ac6869e8b588e8a633e39551b243dfc2f68d4d1d1de38d6ce02217dd0c9231bed4f85737dd24f3762cae95cb0bfdbe7df73d923f907b1

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

Filesize
22KB

MD5
544f4dd222b91ea9febe67fc264512e1

SHA1
138d3cab4d5a39c95d1c711f4cf6a5f7b5abd533

SHA256
6b65f08038aca6ffc04a1aa0a260c16d744e18d42c69884b1f34db57fa839318

SHA512
eedc437982c73acdca4e661eb3fe804223d3f5fde894a935973afa8bf86f313f80e028699edbb4ddfcda7df069326e928dd42112feda1c84e0abc3a9fe00d3b8

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

Filesize
22KB

MD5
544f4dd222b91ea9febe67fc264512e1

SHA1
138d3cab4d5a39c95d1c711f4cf6a5f7b5abd533

SHA256
6b65f08038aca6ffc04a1aa0a260c16d744e18d42c69884b1f34db57fa839318

SHA512
eedc437982c73acdca4e661eb3fe804223d3f5fde894a935973afa8bf86f313f80e028699edbb4ddfcda7df069326e928dd42112feda1c84e0abc3a9fe00d3b8

Download Submit
C:\Users\Admin\Downloads\Unlock_my _files.txt

Filesize
406B

MD5
c6038adaa663b784401790743085bde6

SHA1
53804359eb625eb6f23a49beb3e1fbe7ae70333a

SHA256
82958ca8eee775895536280411b49234ebd5f15ac51b69907deceb20a13c3f38

SHA512
cd660f1805b4a1a73f1ac6869e8b588e8a633e39551b243dfc2f68d4d1d1de38d6ce02217dd0c9231bed4f85737dd24f3762cae95cb0bfdbe7df73d923f907b1

Download Submit
memory/1564-60-0x0000000000DC0000-0x0000000000DCC000-memory.dmp

Filesize
48KB

Download
memory/1564-124-0x000000001AB00000-0x000000001AB80000-memory.dmp

Filesize
512KB

Download
memory/1564-507-0x000000001AB00000-0x000000001AB80000-memory.dmp

Filesize
512KB

Download
memory/1772-54-0x0000000001060000-0x000000000106C000-memory.dmp

Filesize
48KB

Download