chaos | 9a6b116ac22ae3dbb7a2cf6030d5fb94535c528cf555e21f367e3ef4b7841535

Analysis

max time kernel
127s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
18-04-2024 01:26

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

AFPS.rar
Size

10KB
MD5

c5a2787d870b9e4166fb34dd4175c746
SHA1

6cfb8e8fab40d38b4b8a959a7e9f381894b8a333
SHA256

9a6b116ac22ae3dbb7a2cf6030d5fb94535c528cf555e21f367e3ef4b7841535
SHA512

5b88e837e47b03b74cc075e46bc4e216dceddc886d3553cc3fa507329519d58f9b2d7b1cdf185f80017f3ccfa2d8c28aac0b313c3492c2b4acf180a3cabb637a
SSDEEP

192:KQwz1Rbm8fw+pshNT+RxOUcoUFB7IP5HSWnSCezURrDZOwAQmCdzTyFns:vwzTbJLWHiRrcoUvIPxS3CEURnZZoCdf

Score

10^/10

chaos evasion ransomware spyware stealer

Malware Config

Signatures

Chaos
Ransomware family first seen in June 2021.
ransomware chaos

Chaos Ransomware 3 IoCs

resource	yara_rule
behavioral1/files/0x003600000001415f-28.dat	family_chaos
behavioral1/memory/2476-35-0x00000000002D0000-0x00000000002DC000-memory.dmp	family_chaos
behavioral1/memory/2420-42-0x0000000001140000-0x000000000114C000-memory.dmp	family_chaos

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1400	bcdedit.exe
1572	bcdedit.exe

Renames multiple (187) 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
2700	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\read_it.txt	svchost.exe

Executes dropped EXE 2 IoCs

pid	Process
2476	AFPS.exe
2420	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

Drops desktop.ini file(s) 34 IoCs

description	ioc	Process
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\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\Internet Explorer\Quick Launch\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\Accessories\Desktop.ini	svchost.exe
File opened for modification	C:\Users\Public\Pictures\Sample 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\Favorites\Links for United States\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\Music\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\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	C:\Users\Public\Videos\Sample Videos\desktop.ini	svchost.exe
File opened for modification	F:\$RECYCLE.BIN\S-1-5-21-3452737119-3959686427-228443150-1000\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	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\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\Public\Documents\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Music\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\Searches\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\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\Desktop\desktop.ini	svchost.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	svchost.exe

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

System Information Discovery
T1082

Interacts with shadow copies 2 TTPs 1 IoCs

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

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
2160	vssadmin.exe

Opens file in notepad (likely ransom note) 1 IoCs

ransomware

pid	Process
812	NOTEPAD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2420	svchost.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2476	AFPS.exe
2476	AFPS.exe
2476	AFPS.exe
2420	svchost.exe
2588	7zFM.exe
2420	svchost.exe
2420	svchost.exe
2420	svchost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2588	7zFM.exe

Suspicious use of AdjustPrivilegeToken 52 IoCs

description	pid	Process
Token: SeRestorePrivilege	2588	7zFM.exe
Token: 35	2588	7zFM.exe
Token: SeSecurityPrivilege	2588	7zFM.exe
Token: SeSecurityPrivilege	2588	7zFM.exe
Token: SeDebugPrivilege	2476	AFPS.exe
Token: SeDebugPrivilege	2420	svchost.exe
Token: SeBackupPrivilege	112	vssvc.exe
Token: SeRestorePrivilege	112	vssvc.exe
Token: SeAuditPrivilege	112	vssvc.exe
Token: SeIncreaseQuotaPrivilege	3032	WMIC.exe
Token: SeSecurityPrivilege	3032	WMIC.exe
Token: SeTakeOwnershipPrivilege	3032	WMIC.exe
Token: SeLoadDriverPrivilege	3032	WMIC.exe
Token: SeSystemProfilePrivilege	3032	WMIC.exe
Token: SeSystemtimePrivilege	3032	WMIC.exe
Token: SeProfSingleProcessPrivilege	3032	WMIC.exe
Token: SeIncBasePriorityPrivilege	3032	WMIC.exe
Token: SeCreatePagefilePrivilege	3032	WMIC.exe
Token: SeBackupPrivilege	3032	WMIC.exe
Token: SeRestorePrivilege	3032	WMIC.exe
Token: SeShutdownPrivilege	3032	WMIC.exe
Token: SeDebugPrivilege	3032	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3032	WMIC.exe
Token: SeRemoteShutdownPrivilege	3032	WMIC.exe
Token: SeUndockPrivilege	3032	WMIC.exe
Token: SeManageVolumePrivilege	3032	WMIC.exe
Token: 33	3032	WMIC.exe
Token: 34	3032	WMIC.exe
Token: 35	3032	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3032	WMIC.exe
Token: SeSecurityPrivilege	3032	WMIC.exe
Token: SeTakeOwnershipPrivilege	3032	WMIC.exe
Token: SeLoadDriverPrivilege	3032	WMIC.exe
Token: SeSystemProfilePrivilege	3032	WMIC.exe
Token: SeSystemtimePrivilege	3032	WMIC.exe
Token: SeProfSingleProcessPrivilege	3032	WMIC.exe
Token: SeIncBasePriorityPrivilege	3032	WMIC.exe
Token: SeCreatePagefilePrivilege	3032	WMIC.exe
Token: SeBackupPrivilege	3032	WMIC.exe
Token: SeRestorePrivilege	3032	WMIC.exe
Token: SeShutdownPrivilege	3032	WMIC.exe
Token: SeDebugPrivilege	3032	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3032	WMIC.exe
Token: SeRemoteShutdownPrivilege	3032	WMIC.exe
Token: SeUndockPrivilege	3032	WMIC.exe
Token: SeManageVolumePrivilege	3032	WMIC.exe
Token: 33	3032	WMIC.exe
Token: 34	3032	WMIC.exe
Token: 35	3032	WMIC.exe
Token: SeBackupPrivilege	1772	wbengine.exe
Token: SeRestorePrivilege	1772	wbengine.exe
Token: SeSecurityPrivilege	1772	wbengine.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
2588	7zFM.exe
2588	7zFM.exe
2588	7zFM.exe
2588	7zFM.exe
812	NOTEPAD.EXE

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 2588	1936	cmd.exe	29
PID 1936 wrote to memory of 2588	1936	cmd.exe	29
PID 1936 wrote to memory of 2588	1936	cmd.exe	29
PID 2588 wrote to memory of 2476	2588	7zFM.exe	30
PID 2588 wrote to memory of 2476	2588	7zFM.exe	30
PID 2588 wrote to memory of 2476	2588	7zFM.exe	30
PID 2476 wrote to memory of 2420	2476	AFPS.exe	31
PID 2476 wrote to memory of 2420	2476	AFPS.exe	31
PID 2476 wrote to memory of 2420	2476	AFPS.exe	31
PID 2420 wrote to memory of 1588	2420	svchost.exe	33
PID 2420 wrote to memory of 1588	2420	svchost.exe	33
PID 2420 wrote to memory of 1588	2420	svchost.exe	33
PID 1588 wrote to memory of 2160	1588	cmd.exe	35
PID 1588 wrote to memory of 2160	1588	cmd.exe	35
PID 1588 wrote to memory of 2160	1588	cmd.exe	35
PID 1588 wrote to memory of 3032	1588	cmd.exe	38
PID 1588 wrote to memory of 3032	1588	cmd.exe	38
PID 1588 wrote to memory of 3032	1588	cmd.exe	38
PID 2420 wrote to memory of 572	2420	svchost.exe	40
PID 2420 wrote to memory of 572	2420	svchost.exe	40
PID 2420 wrote to memory of 572	2420	svchost.exe	40
PID 572 wrote to memory of 1400	572	cmd.exe	42
PID 572 wrote to memory of 1400	572	cmd.exe	42
PID 572 wrote to memory of 1400	572	cmd.exe	42
PID 572 wrote to memory of 1572	572	cmd.exe	43
PID 572 wrote to memory of 1572	572	cmd.exe	43
PID 572 wrote to memory of 1572	572	cmd.exe	43
PID 2420 wrote to memory of 2724	2420	svchost.exe	44
PID 2420 wrote to memory of 2724	2420	svchost.exe	44
PID 2420 wrote to memory of 2724	2420	svchost.exe	44
PID 2724 wrote to memory of 2700	2724	cmd.exe	46
PID 2724 wrote to memory of 2700	2724	cmd.exe	46
PID 2724 wrote to memory of 2700	2724	cmd.exe	46
PID 2420 wrote to memory of 812	2420	svchost.exe	50
PID 2420 wrote to memory of 812	2420	svchost.exe	50
PID 2420 wrote to memory of 812	2420	svchost.exe	50

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:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\AFPS.rar
1⤵
- Suspicious use of WriteProcessMemory
PID:1936
- C:\Program Files\7-Zip\7zFM.exe
  "C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\AFPS.rar"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:2588
- - C:\Users\Admin\AppData\Local\Temp\7zOC1A74E76\AFPS.exe
    "C:\Users\Admin\AppData\Local\Temp\7zOC1A74E76\AFPS.exe"
    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⤵
      Drops startup file
      Executes dropped EXE
      Drops desktop.ini file(s)
      Suspicious behavior: AddClipboardFormatListener
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2420
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:1588
      - C:\Windows\system32\vssadmin.exe
        
        vssadmin delete shadows /all /quiet
        6⤵
        Interacts with shadow copies
        
        PID:2160
      - C:\Windows\System32\Wbem\WMIC.exe
        
        wmic shadowcopy delete
        6⤵
        Suspicious use of AdjustPrivilegeToken
        
        PID:3032
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:572
      - C:\Windows\system32\bcdedit.exe
        
        bcdedit /set {default} bootstatuspolicy ignoreallfailures
        6⤵
        Modifies boot configuration data using bcdedit
        
        PID:1400
      - C:\Windows\system32\bcdedit.exe
        
        bcdedit /set {default} recoveryenabled no
        6⤵
        Modifies boot configuration data using bcdedit
        
        PID:1572
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2724
      - C:\Windows\system32\wbadmin.exe
        
        wbadmin delete catalog -quiet
        6⤵
        Deletes backup catalog
        
        PID:2700
    - - 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)
        Suspicious use of FindShellTrayWindow
        
        PID:812

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:112

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1772

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:708

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2984

C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\read_it.txt
1⤵
PID:2416

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

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

Inhibit System Recovery

T1490

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\7zOC1A74E76\AFPS.exe

Filesize
24KB

MD5
7518d3af1be7b4a9b9e8d222b3bb7759

SHA1
20f4b443445945e6c4c00d5254e16860414dc7b1

SHA256
19444bb7e4c6685256300f6bc7be3c8c55f295be9f86ea6ed58be84cba40ed5e

SHA512
a8f5fe4b64e8246a919965af88cfa2c211d4fe5cacaeeaa1274ba628300db402846df07b539f3ee5ca69a9baf3f48c185c6a11c282475df04300c0b09a534bfe

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

Filesize
1KB

MD5
0883ccb78f854b7e3a8a4ff57f8bd633

SHA1
0e555b63d33188f2d8ae35a30447be706cecaeb4

SHA256
b8611509a2eaf09095a487eb9cc5b803077cb612f8a1253399ceece1824cd36d

SHA512
b678b846bd0418d267e9ec327c17d02055d42799efd0ae69d5747856cd665a7cc460d390cd6172a12b98b2d9ae5f29ee44393c907555fc97094d2ade33dae50a

Download Submit
memory/2420-42-0x0000000001140000-0x000000000114C000-memory.dmp

Filesize
48KB

Download
memory/2420-44-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

Filesize
9.9MB

Download
memory/2420-46-0x000000001AF00000-0x000000001AF80000-memory.dmp

Filesize
512KB

Download
memory/2420-471-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

Filesize
9.9MB

Download
memory/2420-472-0x000000001AF00000-0x000000001AF80000-memory.dmp

Filesize
512KB

Download
memory/2476-35-0x00000000002D0000-0x00000000002DC000-memory.dmp

Filesize
48KB

Download
memory/2476-36-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

Filesize
9.9MB

Download
memory/2476-43-0x000007FEF5BC0000-0x000007FEF65AC000-memory.dmp

Filesize
9.9MB

Download