Analysis
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max time kernel
120s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
12-03-2024 10:16
Behavioral task
behavioral1
Sample
230726-rv6mnadf4v.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
230726-rv6mnadf4v.exe
Resource
win10v2004-20240226-en
General
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Target
230726-rv6mnadf4v.exe
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Size
953KB
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MD5
adb3dde4a25e596c16ced4cdfc6ff8dd
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SHA1
7934e6bc9489933c0af8dfe7bdff482fc6759bdc
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SHA256
8727091cbb89e5e31eeb2503ffaa242601c8840eee0973fd62fedf1b4b58ab44
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SHA512
f14c27892ed4d11bdd46a130abc7fa40ae8c4577bcd45c3af7c5928b82f27c3646b906fda880e5c9df623071edaab8de82fd46af8f3194f33d7d46c2c3d1d587
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SSDEEP
12288:vEPMLC814R2hig4tHkg2W+AU+R2TjsPvEpv8LpgUO4EP3SL98l0zmWHQuTwYzzjc:/ztQE1ov2AZ9HjkftWy3P
Malware Config
Extracted
C:\Users\Admin\Documents\PLEASEREAD.txt
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1728-0-0x0000000000FA0000-0x0000000001094000-memory.dmp family_chaos C:\Users\Admin\AppData\Roaming\svchost.exe family_chaos behavioral1/memory/2688-7-0x00000000008B0000-0x00000000009A4000-memory.dmp family_chaos -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Detects command variations typically used by ransomware 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1728-0-0x0000000000FA0000-0x0000000001094000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware C:\Users\Admin\AppData\Roaming\svchost.exe INDICATOR_SUSPICIOUS_GENRansomware behavioral1/memory/2688-7-0x00000000008B0000-0x00000000009A4000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware -
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
Processes:
bcdedit.exebcdedit.exepid process 2480 bcdedit.exe 1744 bcdedit.exe -
Renames multiple (212) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Processes:
wbadmin.exepid process 528 wbadmin.exe -
Drops startup file 3 IoCs
Processes:
svchost.exedescription ioc process 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\PLEASEREAD.txt svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe -
Executes dropped EXE 1 IoCs
Processes:
svchost.exepid process 2688 svchost.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 34 IoCs
Processes:
svchost.exedescription ioc process File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\Internet Explorer\Quick Launch\User Pinned\TaskBar\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\Pictures\Sample Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\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\SendTo\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\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\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\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\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\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\Sample Videos\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\Start Menu\Programs\desktop.ini svchost.exe 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\Favorites\Links\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\Public\Music\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-2721934792-624042501-2768869379-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\Public\Desktop\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\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
svchost.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\afr9l34dz.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
Processes:
vssadmin.exepid process 376 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
Processes:
NOTEPAD.EXEpid process 2208 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
svchost.exepid process 2688 svchost.exe -
Suspicious behavior: EnumeratesProcesses 9 IoCs
Processes:
230726-rv6mnadf4v.exesvchost.exepid process 1728 230726-rv6mnadf4v.exe 1728 230726-rv6mnadf4v.exe 1728 230726-rv6mnadf4v.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe 2688 svchost.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
Processes:
230726-rv6mnadf4v.exesvchost.exevssvc.exeWMIC.exewbengine.exedescription pid process Token: SeDebugPrivilege 1728 230726-rv6mnadf4v.exe Token: SeDebugPrivilege 2688 svchost.exe Token: SeBackupPrivilege 1520 vssvc.exe Token: SeRestorePrivilege 1520 vssvc.exe Token: SeAuditPrivilege 1520 vssvc.exe Token: SeIncreaseQuotaPrivilege 2212 WMIC.exe Token: SeSecurityPrivilege 2212 WMIC.exe Token: SeTakeOwnershipPrivilege 2212 WMIC.exe Token: SeLoadDriverPrivilege 2212 WMIC.exe Token: SeSystemProfilePrivilege 2212 WMIC.exe Token: SeSystemtimePrivilege 2212 WMIC.exe Token: SeProfSingleProcessPrivilege 2212 WMIC.exe Token: SeIncBasePriorityPrivilege 2212 WMIC.exe Token: SeCreatePagefilePrivilege 2212 WMIC.exe Token: SeBackupPrivilege 2212 WMIC.exe Token: SeRestorePrivilege 2212 WMIC.exe Token: SeShutdownPrivilege 2212 WMIC.exe Token: SeDebugPrivilege 2212 WMIC.exe Token: SeSystemEnvironmentPrivilege 2212 WMIC.exe Token: SeRemoteShutdownPrivilege 2212 WMIC.exe Token: SeUndockPrivilege 2212 WMIC.exe Token: SeManageVolumePrivilege 2212 WMIC.exe Token: 33 2212 WMIC.exe Token: 34 2212 WMIC.exe Token: 35 2212 WMIC.exe Token: SeIncreaseQuotaPrivilege 2212 WMIC.exe Token: SeSecurityPrivilege 2212 WMIC.exe Token: SeTakeOwnershipPrivilege 2212 WMIC.exe Token: SeLoadDriverPrivilege 2212 WMIC.exe Token: SeSystemProfilePrivilege 2212 WMIC.exe Token: SeSystemtimePrivilege 2212 WMIC.exe Token: SeProfSingleProcessPrivilege 2212 WMIC.exe Token: SeIncBasePriorityPrivilege 2212 WMIC.exe Token: SeCreatePagefilePrivilege 2212 WMIC.exe Token: SeBackupPrivilege 2212 WMIC.exe Token: SeRestorePrivilege 2212 WMIC.exe Token: SeShutdownPrivilege 2212 WMIC.exe Token: SeDebugPrivilege 2212 WMIC.exe Token: SeSystemEnvironmentPrivilege 2212 WMIC.exe Token: SeRemoteShutdownPrivilege 2212 WMIC.exe Token: SeUndockPrivilege 2212 WMIC.exe Token: SeManageVolumePrivilege 2212 WMIC.exe Token: 33 2212 WMIC.exe Token: 34 2212 WMIC.exe Token: 35 2212 WMIC.exe Token: SeBackupPrivilege 2352 wbengine.exe Token: SeRestorePrivilege 2352 wbengine.exe Token: SeSecurityPrivilege 2352 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
230726-rv6mnadf4v.exesvchost.execmd.execmd.execmd.exedescription pid process target process PID 1728 wrote to memory of 2688 1728 230726-rv6mnadf4v.exe svchost.exe PID 1728 wrote to memory of 2688 1728 230726-rv6mnadf4v.exe svchost.exe PID 1728 wrote to memory of 2688 1728 230726-rv6mnadf4v.exe svchost.exe PID 2688 wrote to memory of 1576 2688 svchost.exe cmd.exe PID 2688 wrote to memory of 1576 2688 svchost.exe cmd.exe PID 2688 wrote to memory of 1576 2688 svchost.exe cmd.exe PID 1576 wrote to memory of 376 1576 cmd.exe vssadmin.exe PID 1576 wrote to memory of 376 1576 cmd.exe vssadmin.exe PID 1576 wrote to memory of 376 1576 cmd.exe vssadmin.exe PID 1576 wrote to memory of 2212 1576 cmd.exe WMIC.exe PID 1576 wrote to memory of 2212 1576 cmd.exe WMIC.exe PID 1576 wrote to memory of 2212 1576 cmd.exe WMIC.exe PID 2688 wrote to memory of 1940 2688 svchost.exe cmd.exe PID 2688 wrote to memory of 1940 2688 svchost.exe cmd.exe PID 2688 wrote to memory of 1940 2688 svchost.exe cmd.exe PID 1940 wrote to memory of 2480 1940 cmd.exe bcdedit.exe PID 1940 wrote to memory of 2480 1940 cmd.exe bcdedit.exe PID 1940 wrote to memory of 2480 1940 cmd.exe bcdedit.exe PID 1940 wrote to memory of 1744 1940 cmd.exe bcdedit.exe PID 1940 wrote to memory of 1744 1940 cmd.exe bcdedit.exe PID 1940 wrote to memory of 1744 1940 cmd.exe bcdedit.exe PID 2688 wrote to memory of 692 2688 svchost.exe cmd.exe PID 2688 wrote to memory of 692 2688 svchost.exe cmd.exe PID 2688 wrote to memory of 692 2688 svchost.exe cmd.exe PID 692 wrote to memory of 528 692 cmd.exe wbadmin.exe PID 692 wrote to memory of 528 692 cmd.exe wbadmin.exe PID 692 wrote to memory of 528 692 cmd.exe wbadmin.exe PID 2688 wrote to memory of 2208 2688 svchost.exe NOTEPAD.EXE PID 2688 wrote to memory of 2208 2688 svchost.exe NOTEPAD.EXE PID 2688 wrote to memory of 2208 2688 svchost.exe NOTEPAD.EXE -
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\230726-rv6mnadf4v.exe"C:\Users\Admin\AppData\Local\Temp\230726-rv6mnadf4v.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728 -
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
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2688 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1576 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:376 -
C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2212 -
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:1940 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2480 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1744 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:692 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:528 -
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\PLEASEREAD.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2208
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1520
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2352
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:3040
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:704
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
953KB
MD5adb3dde4a25e596c16ced4cdfc6ff8dd
SHA17934e6bc9489933c0af8dfe7bdff482fc6759bdc
SHA2568727091cbb89e5e31eeb2503ffaa242601c8840eee0973fd62fedf1b4b58ab44
SHA512f14c27892ed4d11bdd46a130abc7fa40ae8c4577bcd45c3af7c5928b82f27c3646b906fda880e5c9df623071edaab8de82fd46af8f3194f33d7d46c2c3d1d587
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Filesize
898B
MD530f33638264fec81af03fc5a9eddd072
SHA172d5d2da2ad261ec87c53d05b570c89e917e8ff1
SHA25635bfff091f9ccc347a27baa02e44db0e4d02ade43f1767777e24d0a6a7abee89
SHA512f5b0e836a2d963dc81c2640921f6bec66ea0a12fdda7549140c2cc1ab028f1c198d83fbb83b867770b061002573f23d6927a2e56b8724b85e5b84c042ab87c0e