chaos | 8ff8af7b31fe7ed58b2afc1b556c635c2ccdf20bce7ca371897dea490a8b5027

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
13-07-2024 09:29

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General

Target

0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe
Size

22KB
MD5

bffd46a9c588683c66b6f4c0dba865c7
SHA1

ac4eb4cdc14f374935a8cd72976da47bd941dbb1
SHA256

0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f
SHA512

bf2bdd9dc55d548e4b0c0e381095a405e4639a3d94028e4a9212aaffd4f17f43313c1056dcc0f1da9a56edd90f8e93d03aad2497063e80701af5759e97fccfd6
SSDEEP

384:m3Mg/bqo2CGVdKXqpVOjuwzUbJlr91CQJc3zDeN:Uqo2RnKXqpIjKtlr9AXeN

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
behavioral8/memory/1652-1-0x00000000000C0000-0x00000000000CC000-memory.dmp	family_chaos
behavioral8/files/0x000a0000000122f6-5.dat	family_chaos
behavioral8/memory/1620-8-0x00000000011A0000-0x00000000011AC000-memory.dmp	family_chaos

Renames multiple (206) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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
1620	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\Favorites\Links for United States\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\Public\Pictures\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\Internet Explorer\Quick Launch\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\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\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	C:\Users\Admin\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\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\Windows\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1506706701-1246725540-2219210854-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\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\Windows\Start Menu\Programs\Accessories\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\Public\Pictures\Sample Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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\Pictures\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\Accessories\Accessibility\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\Saved Games\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\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
1640	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1620	svchost.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1652	0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe
1652	0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe
1652	0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe
1620	svchost.exe
1620	svchost.exe
1620	svchost.exe
1620	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1652	0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe
Token: SeDebugPrivilege	1620	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 1620	1652	0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe	30
PID 1652 wrote to memory of 1620	1652	0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe	30
PID 1652 wrote to memory of 1620	1652	0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe	30
PID 1620 wrote to memory of 1640	1620	svchost.exe	32
PID 1620 wrote to memory of 1640	1620	svchost.exe	32
PID 1620 wrote to memory of 1640	1620	svchost.exe	32

C:\Users\Admin\AppData\Local\Temp\0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe
"C:\Users\Admin\AppData\Local\Temp\0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1652
- 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:1620
- - 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:1640

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
22KB

MD5
bffd46a9c588683c66b6f4c0dba865c7

SHA1
ac4eb4cdc14f374935a8cd72976da47bd941dbb1

SHA256
0b716abe15b17a114c2f12fab954c861f82165bb0868f863cfb8dc634f76be7f

SHA512
bf2bdd9dc55d548e4b0c0e381095a405e4639a3d94028e4a9212aaffd4f17f43313c1056dcc0f1da9a56edd90f8e93d03aad2497063e80701af5759e97fccfd6

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

Filesize
137B

MD5
ef1f34b1e1cd802a342a2b9855dd7b91

SHA1
f6b53ec1e4915a530f35ffd8d8d9e8aacdd0b414

SHA256
8d79f544a9141180099d290c6580e78017d120a6b2dbeafd1bc72a572dbdcb7d

SHA512
587054c0631bdb3b38d0aefb5591bca8f8518a444b6c5157223ceee0d459a2ee653e78e8dd2dff0f06311bcf2114ea16e7c861fc1008015f4c0610cdc8007389

Download Submit
memory/1620-7-0x000007FEF5723000-0x000007FEF5724000-memory.dmp

Filesize
4KB

Download
memory/1620-8-0x00000000011A0000-0x00000000011AC000-memory.dmp

Filesize
48KB

Download
memory/1620-24-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

Filesize
9.9MB

Download
memory/1620-475-0x000007FEF5723000-0x000007FEF5724000-memory.dmp

Filesize
4KB

Download
memory/1620-476-0x000007FEF5720000-0x000007FEF610C000-memory.dmp

Filesize
9.9MB

Download
memory/1652-0-0x000007FEF6113000-0x000007FEF6114000-memory.dmp

Filesize
4KB

Download
memory/1652-1-0x00000000000C0000-0x00000000000CC000-memory.dmp

Filesize
48KB

Download