chaos | e905dcd2c56c2c7a909f4534cd1dba0915a61c59f3781b24f91441ad5e11d395

Analysis

max time kernel
47s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
18-12-2024 20:20

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General

Target

sample047e.exe
Size

697KB
MD5

d2f32f8d4dc173b835fe7cf756f5ec84
SHA1

f7f42099738e36d99b060990b6fa55c147862fb4
SHA256

833f02cdb67445a95c693980f933ce9c256196947c54541716b00111fba2242f
SHA512

852c65e552108043230d16adbc37fb52839dbd3bcc99fd55e4f1c03f7e3b7cf159d319d07e0bc4c7c0d154543ecb1ef75aa5de59bedb18e9d7ac523a4d4be09e
SSDEEP

12288:j+u9z/0Xo/HM8tXAeG6PrCNQ0oLogG9HPpuj5O40GbgC6F1lhOantlF33xJf:A4HwoxlAV3xJ

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Malware Config

Extracted

Path

C:\Users\Admin\Documents\CryptBIT2.0-restore-files.txt

Ransom Note

Hello! Now your files are crypted with the strongest millitary algorithms RSA4096 and AES-256. In addition, all encrypted files have been sent to our server and in the event of non-payment within 7 days,they will be made public. Warning! Do not rename encrypted files. Do not try to decrypt your data using third party software. You can only do damage to your files, lose your money and time. In order to confirm that we are not scammers, you can send 2-3 files to the email address below. Files should be less than 5 MB and contain no valuable data (Databases, backups, large excel sheets, etc.). Please don't forget to write the name of your company in the subject of your e-mail. You will receive decrypted samples. To recover all files you must contact us for a private quote by the contact email. You have to pay for decryption in Bitcoins. P.S. Remember, we are not scammers. We don't need your data or information but after 7 days all files and keys will be deleted automatically. Write to us immediately after infection All your files will be restored. We guarantee. Contact email: [email protected] BTC wallet: bc1qxs0l86yad998ny7wgjznpzdqklawzkczfqya53 Have a nice day CryptBIT 2.0 ransomware group

Emails

[email protected]

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

resource	yara_rule
behavioral1/memory/4592-1-0x0000000000420000-0x00000000004D4000-memory.dmp	family_chaos
behavioral1/files/0x001e00000002aa76-7.dat	family_chaos

Chaos family
chaos
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
4144	bcdedit.exe
1048	bcdedit.exe

Renames multiple (188) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command and Scripting Interpreter

T1059

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
3240	wbadmin.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\CryptBIT2.0-restore-files.txt	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4404	svchost.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
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\Favorites\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-4249425805-3408538557-1766626484-1000\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\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\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\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\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\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\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\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\Music\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\Accessibility\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Pictures\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\Desktop\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\Libraries\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\Documents\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\Downloads\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	svchost.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4249425805-3408538557-1766626484-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\35kcy6dy2.jpg"	svchost.exe

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

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 4 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName	vds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	vds.exe

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
4768	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4249425805-3408538557-1766626484-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
4140	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4404	svchost.exe

Suspicious behavior: EnumeratesProcesses 37 IoCs

pid	Process
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4592	sample047e.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe
4404	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	4592	sample047e.exe
Token: SeDebugPrivilege	4404	svchost.exe
Token: SeBackupPrivilege	1848	vssvc.exe
Token: SeRestorePrivilege	1848	vssvc.exe
Token: SeAuditPrivilege	1848	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1624	WMIC.exe
Token: SeSecurityPrivilege	1624	WMIC.exe
Token: SeTakeOwnershipPrivilege	1624	WMIC.exe
Token: SeLoadDriverPrivilege	1624	WMIC.exe
Token: SeSystemProfilePrivilege	1624	WMIC.exe
Token: SeSystemtimePrivilege	1624	WMIC.exe
Token: SeProfSingleProcessPrivilege	1624	WMIC.exe
Token: SeIncBasePriorityPrivilege	1624	WMIC.exe
Token: SeCreatePagefilePrivilege	1624	WMIC.exe
Token: SeBackupPrivilege	1624	WMIC.exe
Token: SeRestorePrivilege	1624	WMIC.exe
Token: SeShutdownPrivilege	1624	WMIC.exe
Token: SeDebugPrivilege	1624	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1624	WMIC.exe
Token: SeRemoteShutdownPrivilege	1624	WMIC.exe
Token: SeUndockPrivilege	1624	WMIC.exe
Token: SeManageVolumePrivilege	1624	WMIC.exe
Token: 33	1624	WMIC.exe
Token: 34	1624	WMIC.exe
Token: 35	1624	WMIC.exe
Token: 36	1624	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1624	WMIC.exe
Token: SeSecurityPrivilege	1624	WMIC.exe
Token: SeTakeOwnershipPrivilege	1624	WMIC.exe
Token: SeLoadDriverPrivilege	1624	WMIC.exe
Token: SeSystemProfilePrivilege	1624	WMIC.exe
Token: SeSystemtimePrivilege	1624	WMIC.exe
Token: SeProfSingleProcessPrivilege	1624	WMIC.exe
Token: SeIncBasePriorityPrivilege	1624	WMIC.exe
Token: SeCreatePagefilePrivilege	1624	WMIC.exe
Token: SeBackupPrivilege	1624	WMIC.exe
Token: SeRestorePrivilege	1624	WMIC.exe
Token: SeShutdownPrivilege	1624	WMIC.exe
Token: SeDebugPrivilege	1624	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1624	WMIC.exe
Token: SeRemoteShutdownPrivilege	1624	WMIC.exe
Token: SeUndockPrivilege	1624	WMIC.exe
Token: SeManageVolumePrivilege	1624	WMIC.exe
Token: 33	1624	WMIC.exe
Token: 34	1624	WMIC.exe
Token: 35	1624	WMIC.exe
Token: 36	1624	WMIC.exe
Token: SeBackupPrivilege	2280	wbengine.exe
Token: SeRestorePrivilege	2280	wbengine.exe
Token: SeSecurityPrivilege	2280	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4592 wrote to memory of 4404	4592	sample047e.exe	77
PID 4592 wrote to memory of 4404	4592	sample047e.exe	77
PID 4404 wrote to memory of 4240	4404	svchost.exe	79
PID 4404 wrote to memory of 4240	4404	svchost.exe	79
PID 4240 wrote to memory of 4768	4240	cmd.exe	81
PID 4240 wrote to memory of 4768	4240	cmd.exe	81
PID 4240 wrote to memory of 1624	4240	cmd.exe	84
PID 4240 wrote to memory of 1624	4240	cmd.exe	84
PID 4404 wrote to memory of 3620	4404	svchost.exe	86
PID 4404 wrote to memory of 3620	4404	svchost.exe	86
PID 3620 wrote to memory of 4144	3620	cmd.exe	88
PID 3620 wrote to memory of 4144	3620	cmd.exe	88
PID 3620 wrote to memory of 1048	3620	cmd.exe	89
PID 3620 wrote to memory of 1048	3620	cmd.exe	89
PID 4404 wrote to memory of 1612	4404	svchost.exe	90
PID 4404 wrote to memory of 1612	4404	svchost.exe	90
PID 1612 wrote to memory of 3240	1612	cmd.exe	92
PID 1612 wrote to memory of 3240	1612	cmd.exe	92
PID 4404 wrote to memory of 4140	4404	svchost.exe	96
PID 4404 wrote to memory of 4140	4404	svchost.exe	96

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\sample047e.exe
"C:\Users\Admin\AppData\Local\Temp\sample047e.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4592
- 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)
  - Sets desktop wallpaper using registry
  - Modifies registry class
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4404
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4240
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:4768
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1624
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3620
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:4144
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1048
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1612
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:3240
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\CryptBIT2.0-restore-files.txt
    3⤵
    - Opens file in notepad (likely ransom note)
    PID:4140

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1848

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2280

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1672

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:2204

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Management Instrumentation

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

T1006

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

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

Filesize
697KB

MD5
d2f32f8d4dc173b835fe7cf756f5ec84

SHA1
f7f42099738e36d99b060990b6fa55c147862fb4

SHA256
833f02cdb67445a95c693980f933ce9c256196947c54541716b00111fba2242f

SHA512
852c65e552108043230d16adbc37fb52839dbd3bcc99fd55e4f1c03f7e3b7cf159d319d07e0bc4c7c0d154543ecb1ef75aa5de59bedb18e9d7ac523a4d4be09e

Download Submit
C:\Users\Admin\Documents\CryptBIT2.0-restore-files.txt

Filesize
1KB

MD5
71e706a10d2bafab4ca63955ad41522a

SHA1
ba23365ffb0ab82d40097afb4b357456168676f0

SHA256
b9d69adfd173ac284386af59022e856bca43f9be9527f90d96b1189f6a680cb6

SHA512
604912a998bf907ae58fb7535f1ef18277e82a46ad59df83ae2879972abf626678380d140cb98238b5b377e7c05dea07ec027609a4b1363499ffa63fe2bf38f4

Download Submit
memory/4404-15-0x00007FF8ECA50000-0x00007FF8ED512000-memory.dmp

Filesize
10.8MB

Download
memory/4404-445-0x00007FF8ECA50000-0x00007FF8ED512000-memory.dmp

Filesize
10.8MB

Download
memory/4592-0-0x00007FF8ECA53000-0x00007FF8ECA55000-memory.dmp

Filesize
8KB

Download
memory/4592-1-0x0000000000420000-0x00000000004D4000-memory.dmp

Filesize
720KB

Download
memory/4592-2-0x00007FF8ECA53000-0x00007FF8ECA55000-memory.dmp

Filesize
8KB

Download