chaos | 11b11b72193938040f5ae32ebd1eb238c9fcd6ba30f8127bd0a0ca5b2cecc5f0

Analysis

max time kernel
12s
max time network
17s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
02-07-2024 08:21

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General

Target

Encrypter_protected.exe
Size

5.0MB
MD5

0ab2a8b3f487b14f24db2d611eaa1627
SHA1

927990d479f9c6bb3df78442004feccad4577920
SHA256

11b11b72193938040f5ae32ebd1eb238c9fcd6ba30f8127bd0a0ca5b2cecc5f0
SHA512

bedcf4c0bee5a90a72ba1d17fa9358ae8001cead67280e6edc2b82df440b177f6a97ac3c7aade237e9753ee9eec966aebe4fece1b4c0fcc2e062c5055781357a
SSDEEP

98304:elSSzfc2xJTS4VdJY+ZavQU+PiX1/La2TTyH:elSS42xJTzVHYAan1/maTyH

Score

10^/10

chaos evasion persistence ransomware spyware stealer themida trojan

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 10 IoCs

resource	yara_rule
behavioral1/memory/2116-4-0x00000000002E0000-0x0000000000F1E000-memory.dmp	family_chaos
behavioral1/memory/2116-5-0x00000000002E0000-0x0000000000F1E000-memory.dmp	family_chaos
behavioral1/files/0x004f000000015d40-10.dat	family_chaos
behavioral1/memory/2116-19-0x0000000004470000-0x0000000004480000-memory.dmp	family_chaos
behavioral1/memory/2320-31-0x0000000000930000-0x000000000093C000-memory.dmp	family_chaos
behavioral1/memory/2884-39-0x0000000000840000-0x000000000147E000-memory.dmp	family_chaos
behavioral1/memory/2884-36-0x0000000000840000-0x000000000147E000-memory.dmp	family_chaos
behavioral1/memory/2116-97-0x00000000002E0000-0x0000000000F1E000-memory.dmp	family_chaos
behavioral1/memory/2476-112-0x0000000000C60000-0x0000000000C6C000-memory.dmp	family_chaos
behavioral1/memory/2884-115-0x0000000000840000-0x000000000147E000-memory.dmp	family_chaos

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Encrypter_protected.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	Synaptics.exe

Checks BIOS information in registry 2 TTPs 4 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Encrypter_protected.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Encrypter_protected.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Synaptics.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Synaptics.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
2320	._cache_Encrypter_protected.exe
2884	Synaptics.exe
2532	svchost.exe
2476	._cache_Synaptics.exe
1540	svchost.exe

Loads dropped DLL 5 IoCs

pid	Process
2116	Encrypter_protected.exe
2116	Encrypter_protected.exe
2116	Encrypter_protected.exe
2884	Synaptics.exe
2884	Synaptics.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

Themida packer 14 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/2116-0-0x00000000002E0000-0x0000000000F1E000-memory.dmp	themida
behavioral1/memory/2116-2-0x00000000002E0000-0x0000000000F1E000-memory.dmp	themida
behavioral1/memory/2116-4-0x00000000002E0000-0x0000000000F1E000-memory.dmp	themida
behavioral1/memory/2116-3-0x00000000002E0000-0x0000000000F1E000-memory.dmp	themida
behavioral1/memory/2116-5-0x00000000002E0000-0x0000000000F1E000-memory.dmp	themida
behavioral1/files/0x0022000000015d71-17.dat	themida
behavioral1/memory/2884-30-0x0000000000840000-0x000000000147E000-memory.dmp	themida
behavioral1/memory/2884-39-0x0000000000840000-0x000000000147E000-memory.dmp	themida
behavioral1/memory/2884-34-0x0000000000840000-0x000000000147E000-memory.dmp	themida
behavioral1/memory/2884-36-0x0000000000840000-0x000000000147E000-memory.dmp	themida
behavioral1/memory/2884-35-0x0000000000840000-0x000000000147E000-memory.dmp	themida
behavioral1/memory/2116-97-0x00000000002E0000-0x0000000000F1E000-memory.dmp	themida
behavioral1/memory/2884-107-0x00000000035A0000-0x00000000035B0000-memory.dmp	themida
behavioral1/memory/2884-115-0x0000000000840000-0x000000000147E000-memory.dmp	themida

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_protected.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Encrypter_protected.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Synaptics.exe

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\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\Contacts\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\Accessibility\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\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\Public\Music\Sample Music\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-2812790648-3157963462-487717889-1000\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Links\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\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\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\Documents\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\Saved Games\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\Admin\Favorites\Links for United States\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\Desktop\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\Maintenance\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

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2116	Encrypter_protected.exe
2884	Synaptics.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2528	2116	WerFault.exe	27

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
1260	NOTEPAD.EXE

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
2116	Encrypter_protected.exe
2884	Synaptics.exe
2320	._cache_Encrypter_protected.exe
2320	._cache_Encrypter_protected.exe
2320	._cache_Encrypter_protected.exe
2532	svchost.exe
2532	svchost.exe
2532	svchost.exe
2532	svchost.exe
2476	._cache_Synaptics.exe
2476	._cache_Synaptics.exe
2476	._cache_Synaptics.exe
1540	svchost.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2320	._cache_Encrypter_protected.exe
Token: SeDebugPrivilege	2532	svchost.exe
Token: SeDebugPrivilege	2476	._cache_Synaptics.exe
Token: SeDebugPrivilege	1540	svchost.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2116 wrote to memory of 2320	2116	Encrypter_protected.exe	28
PID 2116 wrote to memory of 2320	2116	Encrypter_protected.exe	28
PID 2116 wrote to memory of 2320	2116	Encrypter_protected.exe	28
PID 2116 wrote to memory of 2320	2116	Encrypter_protected.exe	28
PID 2116 wrote to memory of 2884	2116	Encrypter_protected.exe	29
PID 2116 wrote to memory of 2884	2116	Encrypter_protected.exe	29
PID 2116 wrote to memory of 2884	2116	Encrypter_protected.exe	29
PID 2116 wrote to memory of 2884	2116	Encrypter_protected.exe	29
PID 2116 wrote to memory of 2528	2116	Encrypter_protected.exe	30
PID 2116 wrote to memory of 2528	2116	Encrypter_protected.exe	30
PID 2116 wrote to memory of 2528	2116	Encrypter_protected.exe	30
PID 2116 wrote to memory of 2528	2116	Encrypter_protected.exe	30
PID 2320 wrote to memory of 2532	2320	._cache_Encrypter_protected.exe	31
PID 2320 wrote to memory of 2532	2320	._cache_Encrypter_protected.exe	31
PID 2320 wrote to memory of 2532	2320	._cache_Encrypter_protected.exe	31
PID 2884 wrote to memory of 2476	2884	Synaptics.exe	33
PID 2884 wrote to memory of 2476	2884	Synaptics.exe	33
PID 2884 wrote to memory of 2476	2884	Synaptics.exe	33
PID 2884 wrote to memory of 2476	2884	Synaptics.exe	33
PID 2476 wrote to memory of 1540	2476	._cache_Synaptics.exe	34
PID 2476 wrote to memory of 1540	2476	._cache_Synaptics.exe	34
PID 2476 wrote to memory of 1540	2476	._cache_Synaptics.exe	34

C:\Users\Admin\AppData\Local\Temp\Encrypter_protected.exe
"C:\Users\Admin\AppData\Local\Temp\Encrypter_protected.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Loads dropped DLL
- Adds Run key to start application
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2116
- C:\Users\Admin\AppData\Local\Temp\._cache_Encrypter_protected.exe
  "C:\Users\Admin\AppData\Local\Temp\._cache_Encrypter_protected.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2320
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Drops startup file
    - Executes dropped EXE
    - Drops desktop.ini file(s)
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2532
  - - 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:1260
- C:\ProgramData\Synaptics\Synaptics.exe
  "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2884
- - C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe
    "C:\Users\Admin\AppData\Local\Temp\._cache_Synaptics.exe" InjUpdate
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2476
  - - 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:1540
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2116 -s 652
  2⤵
  - Program crash
  PID:2528

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

Virtualization/Sandbox Evasion

T1497

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Synaptics\Synaptics.exe

Filesize
5.0MB

MD5
0ab2a8b3f487b14f24db2d611eaa1627

SHA1
927990d479f9c6bb3df78442004feccad4577920

SHA256
11b11b72193938040f5ae32ebd1eb238c9fcd6ba30f8127bd0a0ca5b2cecc5f0

SHA512
bedcf4c0bee5a90a72ba1d17fa9358ae8001cead67280e6edc2b82df440b177f6a97ac3c7aade237e9753ee9eec966aebe4fece1b4c0fcc2e062c5055781357a

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

Filesize
920B

MD5
96e58c047ee337ee491fbc24f95405a0

SHA1
00caeea02ff70f1e523a9d618ee22cac3b9cc30b

SHA256
e631d7ac377fb25957aef0cf348a9531682e88fb2c438b9e7ae828182d370419

SHA512
4d902a9c9a7b1b19d5e0d064da928d38c22d221405da9beb370fdef9cba252f8410a96a6d7c4e622cdccb4da1b06a92db8f09d300e7e7dc198068d9e72acb381

Download Submit
\Users\Admin\AppData\Local\Temp\._cache_Encrypter_protected.exe

Filesize
22KB

MD5
6ac60b3f3fc089844b316b8edcb6cbdb

SHA1
b4fc7bfd470f3dc67a3b3a9ddcf2dbd26dcaf2b3

SHA256
657c0d869ee0e44742e138b18533577b7c9bca8d40ffe5b658d80459e4f8f4d9

SHA512
af218350125ea6ab9da68bb2edc7dfbdb023f0fc7ff2c446059d739fccc3891ad1974882275cedd2bf42fbbf2fd9ea50fa2d149a4c5cfbd9a23fa37e29071ecf

Download Submit
memory/2116-27-0x0000000006B20000-0x000000000775E000-memory.dmp

Filesize
12.2MB

Download
memory/2116-1-0x0000000076F30000-0x0000000076F32000-memory.dmp

Filesize
8KB

Download
memory/2116-5-0x00000000002E0000-0x0000000000F1E000-memory.dmp

Filesize
12.2MB

Download
memory/2116-8-0x00000000000E0000-0x00000000000E1000-memory.dmp

Filesize
4KB

Download
memory/2116-4-0x00000000002E0000-0x0000000000F1E000-memory.dmp

Filesize
12.2MB

Download
memory/2116-2-0x00000000002E0000-0x0000000000F1E000-memory.dmp

Filesize
12.2MB

Download
memory/2116-19-0x0000000004470000-0x0000000004480000-memory.dmp

Filesize
64KB

Download
memory/2116-0-0x00000000002E0000-0x0000000000F1E000-memory.dmp

Filesize
12.2MB

Download
memory/2116-29-0x0000000006B20000-0x000000000775E000-memory.dmp

Filesize
12.2MB

Download
memory/2116-3-0x00000000002E0000-0x0000000000F1E000-memory.dmp

Filesize
12.2MB

Download
memory/2116-97-0x00000000002E0000-0x0000000000F1E000-memory.dmp

Filesize
12.2MB

Download
memory/2320-31-0x0000000000930000-0x000000000093C000-memory.dmp

Filesize
48KB

Download
memory/2476-112-0x0000000000C60000-0x0000000000C6C000-memory.dmp

Filesize
48KB

Download
memory/2884-30-0x0000000000840000-0x000000000147E000-memory.dmp

Filesize
12.2MB

Download
memory/2884-35-0x0000000000840000-0x000000000147E000-memory.dmp

Filesize
12.2MB

Download
memory/2884-36-0x0000000000840000-0x000000000147E000-memory.dmp

Filesize
12.2MB

Download
memory/2884-34-0x0000000000840000-0x000000000147E000-memory.dmp

Filesize
12.2MB

Download
memory/2884-107-0x00000000035A0000-0x00000000035B0000-memory.dmp

Filesize
64KB

Download
memory/2884-39-0x0000000000840000-0x000000000147E000-memory.dmp

Filesize
12.2MB

Download
memory/2884-115-0x0000000000840000-0x000000000147E000-memory.dmp

Filesize
12.2MB

Download