Analysis
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max time kernel
117s -
max time network
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platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
07-11-2024 14:21
Behavioral task
behavioral1
Sample
6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe
Resource
win10v2004-20241007-en
General
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Target
6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe
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Size
2.8MB
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MD5
9db424c6cad9c48c559c45c5c410ebe1
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SHA1
6e975642501db27324f035990b507fd2eeda30ba
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SHA256
6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98
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SHA512
f0b4ae4e1dd8f25bba0599dd8ec4a088eab74a9545103043d984d2d55a4522cff80480f9d23d0d9683df9dcb03a402929030f42ade7514fe85973dab2eafb9fe
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SSDEEP
24576:1DSqgStv6LDyjF4QYhrxJw+oOD6Nfye2IdiyeU7MMpOusu72d:1+eKQ+Tw5iYfye2IIyFdt7
Malware Config
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 3 IoCs
resource yara_rule behavioral1/memory/2260-1-0x0000000000E90000-0x0000000001160000-memory.dmp family_chaos behavioral1/files/0x0007000000012117-5.dat family_chaos behavioral1/memory/1692-7-0x0000000000120000-0x00000000003F0000-memory.dmp family_chaos -
Chaos family
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Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 1972 bcdedit.exe 3012 bcdedit.exe -
pid Process 3048 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 1692 DeltaKeyfree.exe -
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 34 IoCs
description ioc Process File opened for modification C:\Users\Admin\Documents\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\Accessories\Desktop.ini DeltaKeyfree.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini DeltaKeyfree.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3290804112-2823094203-3137964600-1000\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\Music\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\Music\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\Libraries\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\Desktop\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\Public\Pictures\desktop.ini DeltaKeyfree.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini DeltaKeyfree.exe File opened for modification C:\Users\Public\Documents\desktop.ini DeltaKeyfree.exe File opened for modification C:\Users\Public\Desktop\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\Searches\desktop.ini DeltaKeyfree.exe File opened for modification C:\Users\Admin\Videos\desktop.ini DeltaKeyfree.exe File opened for modification C:\Users\Admin\Favorites\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\Start Menu\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\Saved Games\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\SendTo\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\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\Windows\Start Menu\Programs\Administrative Tools\desktop.ini DeltaKeyfree.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\77b05u22o.jpg" DeltaKeyfree.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 2644 vssadmin.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1692 DeltaKeyfree.exe -
Suspicious behavior: EnumeratesProcesses 7 IoCs
pid Process 2260 6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe 2260 6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe 2260 6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe 1692 DeltaKeyfree.exe 1692 DeltaKeyfree.exe 1692 DeltaKeyfree.exe 1692 DeltaKeyfree.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 2260 6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe Token: SeDebugPrivilege 1692 DeltaKeyfree.exe Token: SeBackupPrivilege 2616 vssvc.exe Token: SeRestorePrivilege 2616 vssvc.exe Token: SeAuditPrivilege 2616 vssvc.exe Token: SeIncreaseQuotaPrivilege 2988 WMIC.exe Token: SeSecurityPrivilege 2988 WMIC.exe Token: SeTakeOwnershipPrivilege 2988 WMIC.exe Token: SeLoadDriverPrivilege 2988 WMIC.exe Token: SeSystemProfilePrivilege 2988 WMIC.exe Token: SeSystemtimePrivilege 2988 WMIC.exe Token: SeProfSingleProcessPrivilege 2988 WMIC.exe Token: SeIncBasePriorityPrivilege 2988 WMIC.exe Token: SeCreatePagefilePrivilege 2988 WMIC.exe Token: SeBackupPrivilege 2988 WMIC.exe Token: SeRestorePrivilege 2988 WMIC.exe Token: SeShutdownPrivilege 2988 WMIC.exe Token: SeDebugPrivilege 2988 WMIC.exe Token: SeSystemEnvironmentPrivilege 2988 WMIC.exe Token: SeRemoteShutdownPrivilege 2988 WMIC.exe Token: SeUndockPrivilege 2988 WMIC.exe Token: SeManageVolumePrivilege 2988 WMIC.exe Token: 33 2988 WMIC.exe Token: 34 2988 WMIC.exe Token: 35 2988 WMIC.exe Token: SeIncreaseQuotaPrivilege 2988 WMIC.exe Token: SeSecurityPrivilege 2988 WMIC.exe Token: SeTakeOwnershipPrivilege 2988 WMIC.exe Token: SeLoadDriverPrivilege 2988 WMIC.exe Token: SeSystemProfilePrivilege 2988 WMIC.exe Token: SeSystemtimePrivilege 2988 WMIC.exe Token: SeProfSingleProcessPrivilege 2988 WMIC.exe Token: SeIncBasePriorityPrivilege 2988 WMIC.exe Token: SeCreatePagefilePrivilege 2988 WMIC.exe Token: SeBackupPrivilege 2988 WMIC.exe Token: SeRestorePrivilege 2988 WMIC.exe Token: SeShutdownPrivilege 2988 WMIC.exe Token: SeDebugPrivilege 2988 WMIC.exe Token: SeSystemEnvironmentPrivilege 2988 WMIC.exe Token: SeRemoteShutdownPrivilege 2988 WMIC.exe Token: SeUndockPrivilege 2988 WMIC.exe Token: SeManageVolumePrivilege 2988 WMIC.exe Token: 33 2988 WMIC.exe Token: 34 2988 WMIC.exe Token: 35 2988 WMIC.exe Token: SeBackupPrivilege 3032 wbengine.exe Token: SeRestorePrivilege 3032 wbengine.exe Token: SeSecurityPrivilege 3032 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 2260 wrote to memory of 1692 2260 6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe 30 PID 2260 wrote to memory of 1692 2260 6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe 30 PID 2260 wrote to memory of 1692 2260 6ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98.exe 30 PID 1692 wrote to memory of 600 1692 DeltaKeyfree.exe 31 PID 1692 wrote to memory of 600 1692 DeltaKeyfree.exe 31 PID 1692 wrote to memory of 600 1692 DeltaKeyfree.exe 31 PID 600 wrote to memory of 2644 600 cmd.exe 33 PID 600 wrote to memory of 2644 600 cmd.exe 33 PID 600 wrote to memory of 2644 600 cmd.exe 33 PID 600 wrote to memory of 2988 600 cmd.exe 37 PID 600 wrote to memory of 2988 600 cmd.exe 37 PID 600 wrote to memory of 2988 600 cmd.exe 37 PID 1692 wrote to memory of 1816 1692 DeltaKeyfree.exe 39 PID 1692 wrote to memory of 1816 1692 DeltaKeyfree.exe 39 PID 1692 wrote to memory of 1816 1692 DeltaKeyfree.exe 39 PID 1816 wrote to memory of 1972 1816 cmd.exe 41 PID 1816 wrote to memory of 1972 1816 cmd.exe 41 PID 1816 wrote to memory of 1972 1816 cmd.exe 41 PID 1816 wrote to memory of 3012 1816 cmd.exe 42 PID 1816 wrote to memory of 3012 1816 cmd.exe 42 PID 1816 wrote to memory of 3012 1816 cmd.exe 42 PID 1692 wrote to memory of 2008 1692 DeltaKeyfree.exe 43 PID 1692 wrote to memory of 2008 1692 DeltaKeyfree.exe 43 PID 1692 wrote to memory of 2008 1692 DeltaKeyfree.exe 43 PID 2008 wrote to memory of 3048 2008 cmd.exe 45 PID 2008 wrote to memory of 3048 2008 cmd.exe 45 PID 2008 wrote to memory of 3048 2008 cmd.exe 45 PID 1692 wrote to memory of 336 1692 DeltaKeyfree.exe 50 PID 1692 wrote to memory of 336 1692 DeltaKeyfree.exe 50 PID 1692 wrote to memory of 336 1692 DeltaKeyfree.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.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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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:2260 -
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:1692 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:600 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2644
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2988
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no3⤵
- Suspicious use of WriteProcessMemory
PID:1816 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1972
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:3012
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2008 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:3048
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\LEIA-ME.txt3⤵PID:336
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2616
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3032
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2568
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:2188
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2.8MB
MD59db424c6cad9c48c559c45c5c410ebe1
SHA16e975642501db27324f035990b507fd2eeda30ba
SHA2566ef2e1dcc973803f396960fcf1199cb037af1a3fd92bd81a8850fd764b8f9d98
SHA512f0b4ae4e1dd8f25bba0599dd8ec4a088eab74a9545103043d984d2d55a4522cff80480f9d23d0d9683df9dcb03a402929030f42ade7514fe85973dab2eafb9fe
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Filesize
561B
MD5f84c053d3c83275afdaa4d2ae0d1d195
SHA111600fd3778a0f74d807d9f13c05e3de5e175e10
SHA2560084d945bfa073934027d3c5b2e5efcbc95c609a08afa62310528f1ae37ce256
SHA512825527abbd5acbf9e8aefca2daec4d375e9be2692ea818f2a7fa3659c86ac096de5e8da712f6de4128bbab18bcd01a4c32f7e078b46de82be75a4c381d420f22