Analysis
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max time kernel
147s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
24-02-2024 14:53
Behavioral task
behavioral1
Sample
240124-n3eblahecn.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
240124-n3eblahecn.exe
Resource
win10v2004-20240221-en
General
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Target
240124-n3eblahecn.exe
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Size
3.4MB
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MD5
f64a5c6fa180acaee93d4fac406c579b
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SHA1
bacf88f16fe670ef2d87df154929c51b28b12263
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SHA256
cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6
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SHA512
01687ae73126dd6540308efa140e56c5410d5971415881a3747cf961c4abcd2e9be4dcd75181f865070bfb4e296617b8e3d61f55de747407a4c459e6a2bc0197
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SSDEEP
24576:SvFnlgEsJu/SqXF3mh8uNFr95+CUNHEes4pyQquVexXCP7OigudxcAGZLqrDIjHM:QloJ0wtfSHO43ZpTLiADL
Malware Config
Extracted
C:\Users\Admin\Documents\PLS_READ_ME.txt
https://pastebin.com/raw/wZnisRDV
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 4 IoCs
resource yara_rule behavioral2/memory/5084-0-0x00000000007F0000-0x0000000000B5A000-memory.dmp family_chaos behavioral2/files/0x00060000000231ec-6.dat family_chaos behavioral2/files/0x00060000000231ec-11.dat family_chaos behavioral2/files/0x00060000000231ec-12.dat 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 4 IoCs
resource yara_rule behavioral2/memory/5084-0-0x00000000007F0000-0x0000000000B5A000-memory.dmp INDICATOR_SUSPICIOUS_GENRansomware behavioral2/files/0x00060000000231ec-6.dat INDICATOR_SUSPICIOUS_GENRansomware behavioral2/files/0x00060000000231ec-11.dat INDICATOR_SUSPICIOUS_GENRansomware behavioral2/files/0x00060000000231ec-12.dat INDICATOR_SUSPICIOUS_GENRansomware -
Detects executables (downlaoders) containing URLs to raw contents of a paste 4 IoCs
resource yara_rule behavioral2/memory/5084-0-0x00000000007F0000-0x0000000000B5A000-memory.dmp INDICATOR_SUSPICIOUS_EXE_RawPaste_URL behavioral2/files/0x00060000000231ec-6.dat INDICATOR_SUSPICIOUS_EXE_RawPaste_URL behavioral2/files/0x00060000000231ec-11.dat INDICATOR_SUSPICIOUS_EXE_RawPaste_URL behavioral2/files/0x00060000000231ec-12.dat INDICATOR_SUSPICIOUS_EXE_RawPaste_URL -
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 1916 bcdedit.exe 1436 bcdedit.exe -
Renames multiple (171) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 2724 wbadmin.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-1414748551-1520717498-2956787782-1000\Control Panel\International\Geo\Nation 240124-n3eblahecn.exe Key value queried \REGISTRY\USER\S-1-5-21-1414748551-1520717498-2956787782-1000\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\PLS_READ_ME.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 816 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
description ioc Process File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\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\Documents\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\Internet Explorer\Quick Launch\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\Recent\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\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\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\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\Windows\AccountPictures\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\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\Saved Games\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\Start Menu\Programs\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 F:\$RECYCLE.BIN\S-1-5-21-1414748551-1520717498-2956787782-1000\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\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\Public\Videos\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1414748551-1520717498-2956787782-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\i9228c6rw.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks SCSI registry key(s) 3 TTPs 4 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_DADY&PROD_DADY_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_DADY&PROD_HARDDISK\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName vds.exe -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 5032 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1414748551-1520717498-2956787782-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2064 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 816 svchost.exe -
Suspicious behavior: EnumeratesProcesses 45 IoCs
pid Process 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 5084 240124-n3eblahecn.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe 816 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 5084 240124-n3eblahecn.exe Token: SeDebugPrivilege 816 svchost.exe Token: SeBackupPrivilege 3344 vssvc.exe Token: SeRestorePrivilege 3344 vssvc.exe Token: SeAuditPrivilege 3344 vssvc.exe Token: SeIncreaseQuotaPrivilege 4844 WMIC.exe Token: SeSecurityPrivilege 4844 WMIC.exe Token: SeTakeOwnershipPrivilege 4844 WMIC.exe Token: SeLoadDriverPrivilege 4844 WMIC.exe Token: SeSystemProfilePrivilege 4844 WMIC.exe Token: SeSystemtimePrivilege 4844 WMIC.exe Token: SeProfSingleProcessPrivilege 4844 WMIC.exe Token: SeIncBasePriorityPrivilege 4844 WMIC.exe Token: SeCreatePagefilePrivilege 4844 WMIC.exe Token: SeBackupPrivilege 4844 WMIC.exe Token: SeRestorePrivilege 4844 WMIC.exe Token: SeShutdownPrivilege 4844 WMIC.exe Token: SeDebugPrivilege 4844 WMIC.exe Token: SeSystemEnvironmentPrivilege 4844 WMIC.exe Token: SeRemoteShutdownPrivilege 4844 WMIC.exe Token: SeUndockPrivilege 4844 WMIC.exe Token: SeManageVolumePrivilege 4844 WMIC.exe Token: 33 4844 WMIC.exe Token: 34 4844 WMIC.exe Token: 35 4844 WMIC.exe Token: 36 4844 WMIC.exe Token: SeIncreaseQuotaPrivilege 4844 WMIC.exe Token: SeSecurityPrivilege 4844 WMIC.exe Token: SeTakeOwnershipPrivilege 4844 WMIC.exe Token: SeLoadDriverPrivilege 4844 WMIC.exe Token: SeSystemProfilePrivilege 4844 WMIC.exe Token: SeSystemtimePrivilege 4844 WMIC.exe Token: SeProfSingleProcessPrivilege 4844 WMIC.exe Token: SeIncBasePriorityPrivilege 4844 WMIC.exe Token: SeCreatePagefilePrivilege 4844 WMIC.exe Token: SeBackupPrivilege 4844 WMIC.exe Token: SeRestorePrivilege 4844 WMIC.exe Token: SeShutdownPrivilege 4844 WMIC.exe Token: SeDebugPrivilege 4844 WMIC.exe Token: SeSystemEnvironmentPrivilege 4844 WMIC.exe Token: SeRemoteShutdownPrivilege 4844 WMIC.exe Token: SeUndockPrivilege 4844 WMIC.exe Token: SeManageVolumePrivilege 4844 WMIC.exe Token: 33 4844 WMIC.exe Token: 34 4844 WMIC.exe Token: 35 4844 WMIC.exe Token: 36 4844 WMIC.exe Token: SeBackupPrivilege 2376 wbengine.exe Token: SeRestorePrivilege 2376 wbengine.exe Token: SeSecurityPrivilege 2376 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 5084 wrote to memory of 816 5084 240124-n3eblahecn.exe 88 PID 5084 wrote to memory of 816 5084 240124-n3eblahecn.exe 88 PID 816 wrote to memory of 2460 816 svchost.exe 92 PID 816 wrote to memory of 2460 816 svchost.exe 92 PID 2460 wrote to memory of 5032 2460 cmd.exe 94 PID 2460 wrote to memory of 5032 2460 cmd.exe 94 PID 2460 wrote to memory of 4844 2460 cmd.exe 97 PID 2460 wrote to memory of 4844 2460 cmd.exe 97 PID 816 wrote to memory of 1544 816 svchost.exe 99 PID 816 wrote to memory of 1544 816 svchost.exe 99 PID 1544 wrote to memory of 1916 1544 cmd.exe 101 PID 1544 wrote to memory of 1916 1544 cmd.exe 101 PID 1544 wrote to memory of 1436 1544 cmd.exe 102 PID 1544 wrote to memory of 1436 1544 cmd.exe 102 PID 816 wrote to memory of 3212 816 svchost.exe 103 PID 816 wrote to memory of 3212 816 svchost.exe 103 PID 3212 wrote to memory of 2724 3212 cmd.exe 105 PID 3212 wrote to memory of 2724 3212 cmd.exe 105 PID 816 wrote to memory of 2064 816 svchost.exe 109 PID 816 wrote to memory of 2064 816 svchost.exe 109 -
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\240124-n3eblahecn.exe"C:\Users\Admin\AppData\Local\Temp\240124-n3eblahecn.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5084 -
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:816 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2460 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:5032
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:4844
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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:1544 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1916
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1436
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:3212 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2724
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\PLS_READ_ME.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2064
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3344
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2376
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2600
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1476
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.7MB
MD594d47fe7ace6e949a051f8fc3c3b0a04
SHA1d60e9803074e227b80ce7ac92a16b0576371ca6b
SHA2561f4964ca6f52d51519e00528102c31b54ce6fe05e98949c77503dca6bb0b229e
SHA51261511e485b3c5d9b5b26ae9036cae2108aa59475d2400ed79f9ffbc26c4e9a43c3107dd3d6c837c8fedb95853dae20eb099ec645bbd2ca6f405c493e925abf86
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Filesize
1.3MB
MD51b988e1750097d9727b4b4386b7b925c
SHA19886e8a4a6d1715f6e7c0208f1bf7a510344a438
SHA2568ae7cacb5ded78f7895f50563dba45a49b473c8af10cc1bf48ee32e2a916585e
SHA5120f22f525802441a38143cbd7e579e8857a6f40dd62643f576f3a209947d5ed26feecfff5ab6bc86577c67dd0d601732074105bdd1dd911bc092c27d634144256
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Filesize
2.3MB
MD57526fb2e9f55b08474fd068a8f42c261
SHA1047525ce4d1b5c0c384b7a9d2d3ed9b6c825de2c
SHA256d7305618e48d2fc07cf1772c9eff77b21099d8645e07d9f2e4da4066d34434ba
SHA5121438cacb2e51b09b9125ea706a59c5d589a5af9af21f1887880b42812fd1fd9c977ac03c89123f943ac6591bbeca73ab9a230dbb8746d1ee9eefbd9ba8feb9a2
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Filesize
1019B
MD5bf4f42180e1f6f0dc0dc8e5863fbfdff
SHA111ebaf5dd9d926371b27c9cdb86a0b7978deb383
SHA256c22510ba329236dacd2e14be4c260eca7a8deb7433cb4291311232f37ee40bd7
SHA5126004b7d2e6a6b4035363d25cb7291dc0be0c0070a8bbadea0c4275278fb4299e3348cb5aebb5d9870ff7986bf43c59983bb3aa1680f1b27fcad8c68064c09c16