chaos | 2d343433e97ee2a6f1baed3e93a66cdb07ed1ce7266bfb008f8a6e281a6adb99

Analysis

max time kernel
141s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02-07-2024 08:20

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General

Target

Encrypter.vmp.exe
Size

19.2MB
MD5

4e5fbe0a7cc9e69bd7f994d694875d86
SHA1

976fa55bf71c158572b4cea74f2413810bf2b568
SHA256

2d343433e97ee2a6f1baed3e93a66cdb07ed1ce7266bfb008f8a6e281a6adb99
SHA512

ff1a2fae26c49a7359afffa30cd41a700eb513f2c03c3ea994807c7b7e848f2e4a2ef585bbd6195adb553e85aabdf25446c736bdcc983ab4b3f223e87454a69d
SSDEEP

393216:osx2sETPcULgSP7hpDsw6+jUIz4fwAnngYOPSfW:otsEgSlpDx64Uq1SgXgW

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/0x0008000000023254-18.dat	family_chaos
behavioral2/memory/2928-74-0x00000000002E0000-0x00000000002EC000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	Encrypter.vmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	._cache_Encrypter.vmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	._cache_Synaptics.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\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
2928	._cache_Encrypter.vmp.exe
2496	Synaptics.exe
1140	._cache_Synaptics.exe
3508	svchost.exe
3704	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\Pictures\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\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\Contacts\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\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Public\Music\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Documents\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\Start Menu\Programs\Administrative Tools\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\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3808065738-1666277613-1125846146-1000\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
File opened for modification	C:\Users\Admin\Downloads\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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\Accessibility\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\AppData\Roaming\Microsoft\Windows\SendTo\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\Public\Videos\desktop.ini	svchost.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs

pid	Process
5108	Encrypter.vmp.exe
5108	Encrypter.vmp.exe
2496	Synaptics.exe
2496	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\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings	svchost.exe
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

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
216	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3508	svchost.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
5108	Encrypter.vmp.exe
5108	Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2496	Synaptics.exe
2496	Synaptics.exe
1140	._cache_Synaptics.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
2928	._cache_Encrypter.vmp.exe
3508	svchost.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
1140	._cache_Synaptics.exe
3704	svchost.exe
3704	svchost.exe
3508	svchost.exe
3508	svchost.exe
3508	svchost.exe
3508	svchost.exe
3508	svchost.exe
3508	svchost.exe
3508	svchost.exe
3508	svchost.exe
3508	svchost.exe
3508	svchost.exe
3508	svchost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2928	._cache_Encrypter.vmp.exe
Token: SeDebugPrivilege	1140	._cache_Synaptics.exe
Token: SeDebugPrivilege	3508	svchost.exe
Token: SeDebugPrivilege	3704	svchost.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 5108 wrote to memory of 2928	5108	Encrypter.vmp.exe	90
PID 5108 wrote to memory of 2928	5108	Encrypter.vmp.exe	90
PID 5108 wrote to memory of 2496	5108	Encrypter.vmp.exe	91
PID 5108 wrote to memory of 2496	5108	Encrypter.vmp.exe	91
PID 5108 wrote to memory of 2496	5108	Encrypter.vmp.exe	91
PID 2496 wrote to memory of 1140	2496	Synaptics.exe	92
PID 2496 wrote to memory of 1140	2496	Synaptics.exe	92
PID 2928 wrote to memory of 3508	2928	._cache_Encrypter.vmp.exe	95
PID 2928 wrote to memory of 3508	2928	._cache_Encrypter.vmp.exe	95
PID 1140 wrote to memory of 3704	1140	._cache_Synaptics.exe	99
PID 1140 wrote to memory of 3704	1140	._cache_Synaptics.exe	99
PID 3508 wrote to memory of 216	3508	svchost.exe	103
PID 3508 wrote to memory of 216	3508	svchost.exe	103

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:5108
- 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:2928
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - 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:3508
  - - C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt
      4⤵
      Opens file in notepad (likely ransom note)
      PID:216
- 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:2496
- - 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:1140
  - - C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3704

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4156 --field-trial-handle=2276,i,5697607538120380977,9987005253899555344,262144 --variations-seed-version /prefetch:8
1⤵
PID:2096

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
19.2MB

MD5
4e5fbe0a7cc9e69bd7f994d694875d86

SHA1
976fa55bf71c158572b4cea74f2413810bf2b568

SHA256
2d343433e97ee2a6f1baed3e93a66cdb07ed1ce7266bfb008f8a6e281a6adb99

SHA512
ff1a2fae26c49a7359afffa30cd41a700eb513f2c03c3ea994807c7b7e848f2e4a2ef585bbd6195adb553e85aabdf25446c736bdcc983ab4b3f223e87454a69d

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/2496-145-0x0000000003EE0000-0x0000000003EE1000-memory.dmp

Filesize
4KB

Download
memory/2496-149-0x0000000000400000-0x000000000227D000-memory.dmp

Filesize
30.5MB

Download
memory/2496-141-0x00000000024E0000-0x00000000024E1000-memory.dmp

Filesize
4KB

Download
memory/2496-142-0x00000000024F0000-0x00000000024F1000-memory.dmp

Filesize
4KB

Download
memory/2496-143-0x0000000002500000-0x0000000002501000-memory.dmp

Filesize
4KB

Download
memory/2496-144-0x0000000002530000-0x0000000002531000-memory.dmp

Filesize
4KB

Download
memory/2496-147-0x0000000003F00000-0x0000000003F01000-memory.dmp

Filesize
4KB

Download
memory/2496-148-0x0000000003F10000-0x0000000003F11000-memory.dmp

Filesize
4KB

Download
memory/2496-146-0x0000000003EF0000-0x0000000003EF1000-memory.dmp

Filesize
4KB

Download
memory/2928-80-0x00007FF9709D3000-0x00007FF9709D5000-memory.dmp

Filesize
8KB

Download
memory/2928-74-0x00000000002E0000-0x00000000002EC000-memory.dmp

Filesize
48KB

Download
memory/5108-12-0x0000000000400000-0x000000000227D000-memory.dmp

Filesize
30.5MB

Download
memory/5108-0-0x00000000004A5000-0x0000000000F4B000-memory.dmp

Filesize
10.6MB

Download
memory/5108-139-0x00000000004A5000-0x0000000000F4B000-memory.dmp

Filesize
10.6MB

Download
memory/5108-140-0x0000000000400000-0x000000000227D000-memory.dmp

Filesize
30.5MB

Download
memory/5108-2-0x00000000040D0000-0x00000000040D1000-memory.dmp

Filesize
4KB

Download
memory/5108-13-0x0000000000400000-0x000000000227D000-memory.dmp

Filesize
30.5MB

Download
memory/5108-8-0x0000000004170000-0x0000000004171000-memory.dmp

Filesize
4KB

Download
memory/5108-3-0x00000000040F0000-0x00000000040F1000-memory.dmp

Filesize
4KB

Download
memory/5108-11-0x0000000000400000-0x000000000227D000-memory.dmp

Filesize
30.5MB

Download
memory/5108-4-0x0000000004130000-0x0000000004131000-memory.dmp

Filesize
4KB

Download
memory/5108-5-0x0000000004140000-0x0000000004141000-memory.dmp

Filesize
4KB

Download
memory/5108-6-0x0000000004150000-0x0000000004151000-memory.dmp

Filesize
4KB

Download
memory/5108-7-0x0000000004160000-0x0000000004161000-memory.dmp

Filesize
4KB

Download
memory/5108-1-0x00000000040C0000-0x00000000040C1000-memory.dmp

Filesize
4KB

Download