chaos | 739e1ab9e63ec4da436b2861c3c23111a823676896b6f2f40cf0051bf5c0e951

Analysis

max time kernel
131s
max time network
140s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-11-2024 16:21

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General

Target

keygenran.exe
Size

388KB
MD5

d313cf4e6bf5e9dcb2ed3e722984bc8e
SHA1

21a28a94e0de60603ad1664a843717a8aeba30c9
SHA256

739e1ab9e63ec4da436b2861c3c23111a823676896b6f2f40cf0051bf5c0e951
SHA512

2a0d479f8b299370bb67ce34f4dfb58b52c70e7edcfa1f9cb6c40a6162455b77aad70bfd1f619dda327d969852eb1c20c7768f1c4247450740c203521f37ff34
SSDEEP

6144:fr9Sqdd/nDTCKm1ussOaOYNmJL2gGYBppgnvufOKvNbq7a+0blRIJ6Af:Dd1nDTC11utmSfqppmvufOgY7a+oRd

Score

10^/10

chaos defense_evasion evasion execution impact ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 2 IoCs

resource	yara_rule
behavioral2/memory/1952-1-0x0000000000170000-0x00000000001D6000-memory.dmp	family_chaos
behavioral2/files/0x0003000000022af2-6.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
1044	bcdedit.exe
664	bcdedit.exe

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
2552	wbadmin.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	keygenran.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\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 1 IoCs

pid	Process
3476	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\Videos\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\SendTo\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Desktop\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\Internet Explorer\Quick Launch\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\Administrative Tools\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Saved Games\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\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	F:\$RECYCLE.BIN\S-1-5-21-3442511616-637977696-3186306149-1000\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\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\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\OneDrive\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\Recent\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\Downloads\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\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\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\Links\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\m2hh1r16q.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\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
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

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
4012	vssadmin.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings	svchost.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
320	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3476	svchost.exe

Suspicious behavior: EnumeratesProcesses 48 IoCs

pid	Process
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
1952	keygenran.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe
3476	svchost.exe

Suspicious use of AdjustPrivilegeToken 50 IoCs

description	pid	Process
Token: SeDebugPrivilege	1952	keygenran.exe
Token: SeDebugPrivilege	3476	svchost.exe
Token: SeBackupPrivilege	1000	vssvc.exe
Token: SeRestorePrivilege	1000	vssvc.exe
Token: SeAuditPrivilege	1000	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1680	WMIC.exe
Token: SeSecurityPrivilege	1680	WMIC.exe
Token: SeTakeOwnershipPrivilege	1680	WMIC.exe
Token: SeLoadDriverPrivilege	1680	WMIC.exe
Token: SeSystemProfilePrivilege	1680	WMIC.exe
Token: SeSystemtimePrivilege	1680	WMIC.exe
Token: SeProfSingleProcessPrivilege	1680	WMIC.exe
Token: SeIncBasePriorityPrivilege	1680	WMIC.exe
Token: SeCreatePagefilePrivilege	1680	WMIC.exe
Token: SeBackupPrivilege	1680	WMIC.exe
Token: SeRestorePrivilege	1680	WMIC.exe
Token: SeShutdownPrivilege	1680	WMIC.exe
Token: SeDebugPrivilege	1680	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1680	WMIC.exe
Token: SeRemoteShutdownPrivilege	1680	WMIC.exe
Token: SeUndockPrivilege	1680	WMIC.exe
Token: SeManageVolumePrivilege	1680	WMIC.exe
Token: 33	1680	WMIC.exe
Token: 34	1680	WMIC.exe
Token: 35	1680	WMIC.exe
Token: 36	1680	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1680	WMIC.exe
Token: SeSecurityPrivilege	1680	WMIC.exe
Token: SeTakeOwnershipPrivilege	1680	WMIC.exe
Token: SeLoadDriverPrivilege	1680	WMIC.exe
Token: SeSystemProfilePrivilege	1680	WMIC.exe
Token: SeSystemtimePrivilege	1680	WMIC.exe
Token: SeProfSingleProcessPrivilege	1680	WMIC.exe
Token: SeIncBasePriorityPrivilege	1680	WMIC.exe
Token: SeCreatePagefilePrivilege	1680	WMIC.exe
Token: SeBackupPrivilege	1680	WMIC.exe
Token: SeRestorePrivilege	1680	WMIC.exe
Token: SeShutdownPrivilege	1680	WMIC.exe
Token: SeDebugPrivilege	1680	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1680	WMIC.exe
Token: SeRemoteShutdownPrivilege	1680	WMIC.exe
Token: SeUndockPrivilege	1680	WMIC.exe
Token: SeManageVolumePrivilege	1680	WMIC.exe
Token: 33	1680	WMIC.exe
Token: 34	1680	WMIC.exe
Token: 35	1680	WMIC.exe
Token: 36	1680	WMIC.exe
Token: SeBackupPrivilege	1660	wbengine.exe
Token: SeRestorePrivilege	1660	wbengine.exe
Token: SeSecurityPrivilege	1660	wbengine.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 3476	1952	keygenran.exe	92
PID 1952 wrote to memory of 3476	1952	keygenran.exe	92
PID 3476 wrote to memory of 3960	3476	svchost.exe	94
PID 3476 wrote to memory of 3960	3476	svchost.exe	94
PID 3960 wrote to memory of 4012	3960	cmd.exe	96
PID 3960 wrote to memory of 4012	3960	cmd.exe	96
PID 3960 wrote to memory of 1680	3960	cmd.exe	99
PID 3960 wrote to memory of 1680	3960	cmd.exe	99
PID 3476 wrote to memory of 2388	3476	svchost.exe	100
PID 3476 wrote to memory of 2388	3476	svchost.exe	100
PID 2388 wrote to memory of 1044	2388	cmd.exe	102
PID 2388 wrote to memory of 1044	2388	cmd.exe	102
PID 2388 wrote to memory of 664	2388	cmd.exe	103
PID 2388 wrote to memory of 664	2388	cmd.exe	103
PID 3476 wrote to memory of 1028	3476	svchost.exe	104
PID 3476 wrote to memory of 1028	3476	svchost.exe	104
PID 1028 wrote to memory of 2552	1028	cmd.exe	106
PID 1028 wrote to memory of 2552	1028	cmd.exe	106
PID 3476 wrote to memory of 320	3476	svchost.exe	113
PID 3476 wrote to memory of 320	3476	svchost.exe	113

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\keygenran.exe
"C:\Users\Admin\AppData\Local\Temp\keygenran.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1952
- C:\Users\Admin\AppData\Roaming\svchost.exe
  "C:\Users\Admin\AppData\Roaming\svchost.exe"
  2⤵
  - Checks computer location settings
  - 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:3476
- - 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:3960
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:4012
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1680
- - 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:2388
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:1044
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} recoveryenabled no
      4⤵
      Modifies boot configuration data using bcdedit
      PID:664
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1028
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:2552
- - 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:320

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1000

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1660

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:2768

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:3524

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
388KB

MD5
d313cf4e6bf5e9dcb2ed3e722984bc8e

SHA1
21a28a94e0de60603ad1664a843717a8aeba30c9

SHA256
739e1ab9e63ec4da436b2861c3c23111a823676896b6f2f40cf0051bf5c0e951

SHA512
2a0d479f8b299370bb67ce34f4dfb58b52c70e7edcfa1f9cb6c40a6162455b77aad70bfd1f619dda327d969852eb1c20c7768f1c4247450740c203521f37ff34

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

Filesize
722B

MD5
d55bb9ee91282049366a8f31d80f7308

SHA1
e2247b1b850d8ab895a66fbb11e2312277d560ce

SHA256
01c250d8b2c7dedc5982edd61187ca77654415de0c28dea7605c1875a1a425c2

SHA512
74dc8586975345f4e5fa1f20ac3ed772f35dd7ac077ab9682ec61acd38ecc5d69668c7c66b52aeccf15821434d640e7efa012ff8355b0db4b3d68ac99a8eb878

Download Submit
memory/1952-0-0x00007FFB39E23000-0x00007FFB39E25000-memory.dmp

Filesize
8KB

Download
memory/1952-1-0x0000000000170000-0x00000000001D6000-memory.dmp

Filesize
408KB

Download
memory/3476-14-0x00007FFB39E20000-0x00007FFB3A8E1000-memory.dmp

Filesize
10.8MB

Download
memory/3476-73-0x00007FFB39E20000-0x00007FFB3A8E1000-memory.dmp

Filesize
10.8MB

Download