chaos | 6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
06-11-2024 21:24

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General

Target

6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe
Size

2.8MB
MD5

9db424c6cad9c48c559c45c5c410ebe1
SHA1

6e975642501db27324f035990b507fd2eeda30ba
SHA256

6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98
SHA512

f0b4ae4e1dd8f25bba0599dd8ec4a088eab74a9545103043d984d2d55a4522cff80480f9d23d0d9683df9dcb03a402929030f42ade7514fe85973dab2eafb9fe
SSDEEP

24576:1DSqgStv6LDyjF4QYhrxJw+oOD6Nfye2IdiyeU7MMpOusu72d:1+eKQ+Tw5iYfye2IIyFdt7

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 3 IoCs

resource	yara_rule
behavioral1/memory/3032-1-0x0000000000B00000-0x0000000000DD0000-memory.dmp	family_chaos
behavioral1/files/0x000b000000012280-5.dat	family_chaos
behavioral1/memory/2608-7-0x0000000000340000-0x0000000000610000-memory.dmp	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
804	bcdedit.exe
1048	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
1540	wbadmin.exe

Drops startup file 3 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DeltaKeyfree.url	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini	DeltaKeyfree.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\LEIA-ME.txt	DeltaKeyfree.exe

Executes dropped EXE 1 IoCs

pid	Process
2608	DeltaKeyfree.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	F:\$RECYCLE.BIN\S-1-5-21-1163522206-1469769407-485553996-1000\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Links\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Downloads\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Contacts\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Pictures\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Saved Games\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Favorites\Links for United States\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Public\Pictures\Sample Pictures\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Videos\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Favorites\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Favorites\Links\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Public\Pictures\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Public\Music\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Public\Desktop\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Desktop\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Searches\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Public\Documents\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Public\Videos\Sample Videos\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Public\Music\Sample Music\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Public\Videos\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Documents\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\Music\desktop.ini	DeltaKeyfree.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini	DeltaKeyfree.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-1-5-21-1163522206-1469769407-485553996-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\814ait8yl.jpg"	DeltaKeyfree.exe

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

System Information Discovery
T1082

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
2420	vssadmin.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2608	DeltaKeyfree.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3032	6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe
3032	6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe
3032	6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe
2608	DeltaKeyfree.exe
2608	DeltaKeyfree.exe
2608	DeltaKeyfree.exe
2608	DeltaKeyfree.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe
Token: SeDebugPrivilege	2608	DeltaKeyfree.exe
Token: SeBackupPrivilege	1996	vssvc.exe
Token: SeRestorePrivilege	1996	vssvc.exe
Token: SeAuditPrivilege	1996	vssvc.exe
Token: SeIncreaseQuotaPrivilege	1868	WMIC.exe
Token: SeSecurityPrivilege	1868	WMIC.exe
Token: SeTakeOwnershipPrivilege	1868	WMIC.exe
Token: SeLoadDriverPrivilege	1868	WMIC.exe
Token: SeSystemProfilePrivilege	1868	WMIC.exe
Token: SeSystemtimePrivilege	1868	WMIC.exe
Token: SeProfSingleProcessPrivilege	1868	WMIC.exe
Token: SeIncBasePriorityPrivilege	1868	WMIC.exe
Token: SeCreatePagefilePrivilege	1868	WMIC.exe
Token: SeBackupPrivilege	1868	WMIC.exe
Token: SeRestorePrivilege	1868	WMIC.exe
Token: SeShutdownPrivilege	1868	WMIC.exe
Token: SeDebugPrivilege	1868	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1868	WMIC.exe
Token: SeRemoteShutdownPrivilege	1868	WMIC.exe
Token: SeUndockPrivilege	1868	WMIC.exe
Token: SeManageVolumePrivilege	1868	WMIC.exe
Token: 33	1868	WMIC.exe
Token: 34	1868	WMIC.exe
Token: 35	1868	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1868	WMIC.exe
Token: SeSecurityPrivilege	1868	WMIC.exe
Token: SeTakeOwnershipPrivilege	1868	WMIC.exe
Token: SeLoadDriverPrivilege	1868	WMIC.exe
Token: SeSystemProfilePrivilege	1868	WMIC.exe
Token: SeSystemtimePrivilege	1868	WMIC.exe
Token: SeProfSingleProcessPrivilege	1868	WMIC.exe
Token: SeIncBasePriorityPrivilege	1868	WMIC.exe
Token: SeCreatePagefilePrivilege	1868	WMIC.exe
Token: SeBackupPrivilege	1868	WMIC.exe
Token: SeRestorePrivilege	1868	WMIC.exe
Token: SeShutdownPrivilege	1868	WMIC.exe
Token: SeDebugPrivilege	1868	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1868	WMIC.exe
Token: SeRemoteShutdownPrivilege	1868	WMIC.exe
Token: SeUndockPrivilege	1868	WMIC.exe
Token: SeManageVolumePrivilege	1868	WMIC.exe
Token: 33	1868	WMIC.exe
Token: 34	1868	WMIC.exe
Token: 35	1868	WMIC.exe
Token: SeBackupPrivilege	1768	wbengine.exe
Token: SeRestorePrivilege	1768	wbengine.exe
Token: SeSecurityPrivilege	1768	wbengine.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2608	3032	6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe	30
PID 3032 wrote to memory of 2608	3032	6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe	30
PID 3032 wrote to memory of 2608	3032	6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe	30
PID 2608 wrote to memory of 2808	2608	DeltaKeyfree.exe	31
PID 2608 wrote to memory of 2808	2608	DeltaKeyfree.exe	31
PID 2608 wrote to memory of 2808	2608	DeltaKeyfree.exe	31
PID 2808 wrote to memory of 2420	2808	cmd.exe	33
PID 2808 wrote to memory of 2420	2808	cmd.exe	33
PID 2808 wrote to memory of 2420	2808	cmd.exe	33
PID 2808 wrote to memory of 1868	2808	cmd.exe	37
PID 2808 wrote to memory of 1868	2808	cmd.exe	37
PID 2808 wrote to memory of 1868	2808	cmd.exe	37
PID 2608 wrote to memory of 1752	2608	DeltaKeyfree.exe	39
PID 2608 wrote to memory of 1752	2608	DeltaKeyfree.exe	39
PID 2608 wrote to memory of 1752	2608	DeltaKeyfree.exe	39
PID 1752 wrote to memory of 804	1752	cmd.exe	41
PID 1752 wrote to memory of 804	1752	cmd.exe	41
PID 1752 wrote to memory of 804	1752	cmd.exe	41
PID 1752 wrote to memory of 1048	1752	cmd.exe	42
PID 1752 wrote to memory of 1048	1752	cmd.exe	42
PID 1752 wrote to memory of 1048	1752	cmd.exe	42
PID 2608 wrote to memory of 1672	2608	DeltaKeyfree.exe	43
PID 2608 wrote to memory of 1672	2608	DeltaKeyfree.exe	43
PID 2608 wrote to memory of 1672	2608	DeltaKeyfree.exe	43
PID 1672 wrote to memory of 1540	1672	cmd.exe	45
PID 1672 wrote to memory of 1540	1672	cmd.exe	45
PID 1672 wrote to memory of 1540	1672	cmd.exe	45
PID 2608 wrote to memory of 1044	2608	DeltaKeyfree.exe	49
PID 2608 wrote to memory of 1044	2608	DeltaKeyfree.exe	49
PID 2608 wrote to memory of 1044	2608	DeltaKeyfree.exe	49

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\6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe
"C:\Users\Admin\AppData\Local\Temp\6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Users\Admin\AppData\Roaming\DeltaKeyfree.exe
  "C:\Users\Admin\AppData\Roaming\DeltaKeyfree.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Drops desktop.ini file(s)
  - Sets desktop wallpaper using registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2608
- - 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:2808
  - - C:\Windows\system32\vssadmin.exe
      vssadmin delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:2420
  - - C:\Windows\System32\Wbem\WMIC.exe
      wmic shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1868
- - 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:1752
  - - C:\Windows\system32\bcdedit.exe
      bcdedit /set {default} bootstatuspolicy ignoreallfailures
      4⤵
      Modifies boot configuration data using bcdedit
      PID:804
  - - 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:1672
  - - C:\Windows\system32\wbadmin.exe
      wbadmin delete catalog -quiet
      4⤵
      Deletes backup catalog
      PID:1540
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\LEIA-ME.txt
    3⤵
    PID:1044

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1996

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1768

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1520

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2508

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

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\DeltaKeyfree.exe

Filesize
2.8MB

MD5
9db424c6cad9c48c559c45c5c410ebe1

SHA1
6e975642501db27324f035990b507fd2eeda30ba

SHA256
6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98

SHA512
f0b4ae4e1dd8f25bba0599dd8ec4a088eab74a9545103043d984d2d55a4522cff80480f9d23d0d9683df9dcb03a402929030f42ade7514fe85973dab2eafb9fe

Download Submit
C:\Users\Admin\Desktop\LEIA-ME.txt

Filesize
561B

MD5
f84c053d3c83275afdaa4d2ae0d1d195

SHA1
11600fd3778a0f74d807d9f13c05e3de5e175e10

SHA256
0084d945bfa073934027d3c5b2e5efcbc95c609a08afa62310528f1ae37ce256

SHA512
825527abbd5acbf9e8aefca2daec4d375e9be2692ea818f2a7fa3659c86ac096de5e8da712f6de4128bbab18bcd01a4c32f7e078b46de82be75a4c381d420f22

Download Submit
memory/2608-7-0x0000000000340000-0x0000000000610000-memory.dmp

Filesize
2.8MB

Download
memory/2608-72-0x000007FEF4BF0000-0x000007FEF55DC000-memory.dmp

Filesize
9.9MB

Download
memory/2608-73-0x000007FEF4BF3000-0x000007FEF4BF4000-memory.dmp

Filesize
4KB

Download
memory/2608-74-0x000007FEF4BF0000-0x000007FEF55DC000-memory.dmp

Filesize
9.9MB

Download
memory/3032-0-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

Filesize
4KB

Download
memory/3032-1-0x0000000000B00000-0x0000000000DD0000-memory.dmp

Filesize
2.8MB

Download