chaos | c5b4eb6acef3b9b5eac756dac556b1f2cd78f093fcb080afc28fa035d3268120

Analysis

max time kernel
41s
max time network
52s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
02-07-2024 08:16

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General

Target

Encrypter.vmp.exe
Size

6.6MB
MD5

09c4a597062486018955781571bf035e
SHA1

a4699c331aa48e58a21e864fe40aa0bc64e133bf
SHA256

c5b4eb6acef3b9b5eac756dac556b1f2cd78f093fcb080afc28fa035d3268120
SHA512

6b7f944864eb64e7ccfb72a37e631a647af389cd829fd05e15df0e5aca1a4d747205a002c6028dc21fbea3139fbc9a16629eb749772033d66dd3fb5a29523795
SSDEEP

98304:hUGZUP1EzfFwEaMy2/WNZaPJPu7255fEv1rIger8JkkDtHIhDDwUuUfgXzkn28lG:hZUt/ElyZsBuC3Wl5JkxDzfgXzqb5E

Score

10^/10

chaos persistence ransomware spyware stealer

Malware Config

Extracted

Path

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

Ransom Note

----> You got ransom by FemboyCat <---- All of your files have been encrypted Your computer was infected with a ransomware virus. Your files have been encrypted and you won't be able to decrypt them without our help.What can I do to get my files back?You can buy our special decryption software, this software will allow you to recover all of your data and remove the ransomware from your computer.The price for the software is $1,500. Payment can be made in Bitcoin only. How do I pay, where do I get Bitcoin? Purchasing Bitcoin varies from country to country, you are best advised to do a quick google search yourself to find out how to buy Bitcoin. Many of our customers have reported these sites to be fast and reliable: Coinmama - hxxps://www.coinmama.com Bitpanda - hxxps://www.bitpanda.com Payment informationAmount: 0.1473766 BTC Bitcoin Address: bc1qlnzcep4l4ac0ttdrq7awxev9ehu465f2vpt9x0

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023404-17.dat	family_chaos
behavioral2/memory/5052-79-0x0000000000F10000-0x0000000000F1C000-memory.dmp	family_chaos

Checks computer location settings 2 TTPs 5 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	Encrypter.vmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	._cache_Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	._cache_Encrypter.vmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	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\read_it.txt	svchost.exe

Executes dropped EXE 5 IoCs

pid	Process
5052	._cache_Encrypter.vmp.exe
3864	Synaptics.exe
1712	._cache_Synaptics.exe
3696	svchost.exe
1488	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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Synaptics Pointing Device Driver = "C:\\ProgramData\\Synaptics\\Synaptics.exe"	Encrypter.vmp.exe

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Camera Roll\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\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\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\Accessibility\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\Saved 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\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-1337824034-2731376981-3755436523-1000\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\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\Windows\Recent\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\System Tools\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\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\Music\desktop.ini	svchost.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs

pid	Process
1388	Encrypter.vmp.exe
1388	Encrypter.vmp.exe
3864	Synaptics.exe
3864	Synaptics.exe

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

System Information Discovery
T1082

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Encrypter.vmp.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Synaptics.exe
Key created	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
2732	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3696	svchost.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1388	Encrypter.vmp.exe
1388	Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
3864	Synaptics.exe
3864	Synaptics.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
1712	._cache_Synaptics.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
1712	._cache_Synaptics.exe
1712	._cache_Synaptics.exe
3696	svchost.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
5052	._cache_Encrypter.vmp.exe
3696	svchost.exe
3696	svchost.exe
3696	svchost.exe
3696	svchost.exe
1488	svchost.exe
3696	svchost.exe
3696	svchost.exe
3696	svchost.exe
3696	svchost.exe
1488	svchost.exe
1488	svchost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	5052	._cache_Encrypter.vmp.exe
Token: SeDebugPrivilege	1712	._cache_Synaptics.exe
Token: SeDebugPrivilege	3696	svchost.exe
Token: SeDebugPrivilege	1488	svchost.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 5052	1388	Encrypter.vmp.exe	81
PID 1388 wrote to memory of 5052	1388	Encrypter.vmp.exe	81
PID 1388 wrote to memory of 3864	1388	Encrypter.vmp.exe	82
PID 1388 wrote to memory of 3864	1388	Encrypter.vmp.exe	82
PID 1388 wrote to memory of 3864	1388	Encrypter.vmp.exe	82
PID 3864 wrote to memory of 1712	3864	Synaptics.exe	83
PID 3864 wrote to memory of 1712	3864	Synaptics.exe	83
PID 1712 wrote to memory of 3696	1712	._cache_Synaptics.exe	84
PID 1712 wrote to memory of 3696	1712	._cache_Synaptics.exe	84
PID 5052 wrote to memory of 1488	5052	._cache_Encrypter.vmp.exe	85
PID 5052 wrote to memory of 1488	5052	._cache_Encrypter.vmp.exe	85
PID 3696 wrote to memory of 2732	3696	svchost.exe	86
PID 3696 wrote to memory of 2732	3696	svchost.exe	86

C:\Users\Admin\AppData\Local\Temp\Encrypter.vmp.exe
"C:\Users\Admin\AppData\Local\Temp\Encrypter.vmp.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1388
- C:\Users\Admin\AppData\Local\Temp\._cache_Encrypter.vmp.exe
  "C:\Users\Admin\AppData\Local\Temp\._cache_Encrypter.vmp.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5052
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1488
- C:\ProgramData\Synaptics\Synaptics.exe
  "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3864
- - C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe
    "C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe" InjUpdate
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1712
  - - C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      4⤵
      Checks computer location settings
      Drops startup file
      Executes dropped EXE
      Drops desktop.ini file(s)
      Modifies registry class
      Suspicious behavior: AddClipboardFormatListener
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:3696
    - - C:\Windows\system32\NOTEPAD.EXE
        
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
        5⤵
        Opens file in notepad (likely ransom note)
        
        PID:2732

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

Query Registry

T1012

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\Synaptics\Synaptics.exe

Filesize
6.6MB

MD5
09c4a597062486018955781571bf035e

SHA1
a4699c331aa48e58a21e864fe40aa0bc64e133bf

SHA256
c5b4eb6acef3b9b5eac756dac556b1f2cd78f093fcb080afc28fa035d3268120

SHA512
6b7f944864eb64e7ccfb72a37e631a647af389cd829fd05e15df0e5aca1a4d747205a002c6028dc21fbea3139fbc9a16629eb749772033d66dd3fb5a29523795

Download Submit
C:\Users\Admin\AppData\Local\Temp\._cache_Encrypter.vmp.exe

Filesize
22KB

MD5
6ac60b3f3fc089844b316b8edcb6cbdb

SHA1
b4fc7bfd470f3dc67a3b3a9ddcf2dbd26dcaf2b3

SHA256
657c0d869ee0e44742e138b18533577b7c9bca8d40ffe5b658d80459e4f8f4d9

SHA512
af218350125ea6ab9da68bb2edc7dfbdb023f0fc7ff2c446059d739fccc3891ad1974882275cedd2bf42fbbf2fd9ea50fa2d149a4c5cfbd9a23fa37e29071ecf

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

Filesize
920B

MD5
96e58c047ee337ee491fbc24f95405a0

SHA1
00caeea02ff70f1e523a9d618ee22cac3b9cc30b

SHA256
e631d7ac377fb25957aef0cf348a9531682e88fb2c438b9e7ae828182d370419

SHA512
4d902a9c9a7b1b19d5e0d064da928d38c22d221405da9beb370fdef9cba252f8410a96a6d7c4e622cdccb4da1b06a92db8f09d300e7e7dc198068d9e72acb381

Download Submit
memory/1388-9-0x0000000000400000-0x0000000000F09000-memory.dmp

Filesize
11.0MB

Download
memory/1388-11-0x0000000000400000-0x0000000000F09000-memory.dmp

Filesize
11.0MB

Download
memory/1388-7-0x0000000002CD0000-0x0000000002CD1000-memory.dmp

Filesize
4KB

Download
memory/1388-6-0x0000000002CC0000-0x0000000002CC1000-memory.dmp

Filesize
4KB

Download
memory/1388-5-0x0000000002CB0000-0x0000000002CB1000-memory.dmp

Filesize
4KB

Download
memory/1388-4-0x0000000002CA0000-0x0000000002CA1000-memory.dmp

Filesize
4KB

Download
memory/1388-2-0x0000000002C60000-0x0000000002C61000-memory.dmp

Filesize
4KB

Download
memory/1388-138-0x00000000004A5000-0x0000000000868000-memory.dmp

Filesize
3.8MB

Download
memory/1388-14-0x0000000000400000-0x0000000000F09000-memory.dmp

Filesize
11.0MB

Download
memory/1388-8-0x0000000002CE0000-0x0000000002CE1000-memory.dmp

Filesize
4KB

Download
memory/1388-3-0x0000000002C70000-0x0000000002C71000-memory.dmp

Filesize
4KB

Download
memory/1388-0-0x00000000004A5000-0x0000000000868000-memory.dmp

Filesize
3.8MB

Download
memory/1388-1-0x0000000000F90000-0x0000000000F91000-memory.dmp

Filesize
4KB

Download
memory/1388-139-0x0000000000400000-0x0000000000F09000-memory.dmp

Filesize
11.0MB

Download
memory/3864-145-0x00000000011F0000-0x00000000011F1000-memory.dmp

Filesize
4KB

Download
memory/3864-148-0x0000000000400000-0x0000000000F09000-memory.dmp

Filesize
11.0MB

Download
memory/3864-147-0x0000000001210000-0x0000000001211000-memory.dmp

Filesize
4KB

Download
memory/3864-146-0x0000000001200000-0x0000000001201000-memory.dmp

Filesize
4KB

Download
memory/3864-144-0x00000000011E0000-0x00000000011E1000-memory.dmp

Filesize
4KB

Download
memory/3864-143-0x00000000010C0000-0x00000000010C1000-memory.dmp

Filesize
4KB

Download
memory/3864-142-0x0000000001090000-0x0000000001091000-memory.dmp

Filesize
4KB

Download
memory/3864-141-0x0000000001080000-0x0000000001081000-memory.dmp

Filesize
4KB

Download
memory/3864-140-0x0000000001070000-0x0000000001071000-memory.dmp

Filesize
4KB

Download
memory/5052-79-0x0000000000F10000-0x0000000000F1C000-memory.dmp

Filesize
48KB

Download
memory/5052-78-0x00007FFDAE393000-0x00007FFDAE395000-memory.dmp

Filesize
8KB

Download