Analysis
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max time kernel
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max time network
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platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
30-05-2024 14:54
Behavioral task
behavioral1
Sample
7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe
Resource
win10v2004-20240508-en
General
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Target
7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe
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Size
381KB
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MD5
ad284d8e19e16bb34a12648c219eff2d
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SHA1
d5371b5cbc05c75548112b2ab42b47b4a695ac0a
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SHA256
7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135
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SHA512
24ff90ba62bab82fab76bc5f748a4fc13708a484fdebdc6320f068b8fc42da8723c6e0253fab1752e1ed8c3de8bfcbd8850c7bb1d7be6cd02a88c03a0b4c4b00
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SSDEEP
6144:eB0r9q8EF+HSt/TRAfo7f4Zp3Ld61GN4SwNqEzf:e2EF+HS9TRAfo7f4ZpLc1GN4SwNqEzf
Malware Config
Extracted
C:\Users\Admin\Documents\read_it.txt
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/3000-1-0x0000000000CB0000-0x0000000000D16000-memory.dmp family_chaos behavioral1/files/0x000b00000001227b-5.dat family_chaos behavioral1/memory/2604-8-0x00000000001D0000-0x0000000000236000-memory.dmp family_chaos -
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 1624 bcdedit.exe 1616 bcdedit.exe -
Renames multiple (206) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 2368 wbadmin.exe -
Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Firefox Software Updator.url Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini Firefox Software Updator.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt Firefox Software Updator.exe -
Executes dropped EXE 1 IoCs
pid Process 2604 Firefox Software Updator.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\Music\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Links\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Public\Pictures\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Public\Videos\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Public\Desktop\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Searches\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini Firefox Software Updator.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-268080393-3149932598-1824759070-1000\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Documents\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\Videos\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Public\Documents\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Public\Music\desktop.ini Firefox Software Updator.exe File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini Firefox Software Updator.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\zfwk3p0qo.jpg" Firefox Software Updator.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.
pid Process 2508 vssadmin.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2488 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2604 Firefox Software Updator.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
pid Process 3000 7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe 3000 7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe 2604 Firefox Software Updator.exe 2604 Firefox Software Updator.exe 2604 Firefox Software Updator.exe -
Suspicious use of AdjustPrivilegeToken 48 IoCs
description pid Process Token: SeDebugPrivilege 3000 7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe Token: SeDebugPrivilege 2604 Firefox Software Updator.exe Token: SeBackupPrivilege 2712 vssvc.exe Token: SeRestorePrivilege 2712 vssvc.exe Token: SeAuditPrivilege 2712 vssvc.exe Token: SeIncreaseQuotaPrivilege 604 WMIC.exe Token: SeSecurityPrivilege 604 WMIC.exe Token: SeTakeOwnershipPrivilege 604 WMIC.exe Token: SeLoadDriverPrivilege 604 WMIC.exe Token: SeSystemProfilePrivilege 604 WMIC.exe Token: SeSystemtimePrivilege 604 WMIC.exe Token: SeProfSingleProcessPrivilege 604 WMIC.exe Token: SeIncBasePriorityPrivilege 604 WMIC.exe Token: SeCreatePagefilePrivilege 604 WMIC.exe Token: SeBackupPrivilege 604 WMIC.exe Token: SeRestorePrivilege 604 WMIC.exe Token: SeShutdownPrivilege 604 WMIC.exe Token: SeDebugPrivilege 604 WMIC.exe Token: SeSystemEnvironmentPrivilege 604 WMIC.exe Token: SeRemoteShutdownPrivilege 604 WMIC.exe Token: SeUndockPrivilege 604 WMIC.exe Token: SeManageVolumePrivilege 604 WMIC.exe Token: 33 604 WMIC.exe Token: 34 604 WMIC.exe Token: 35 604 WMIC.exe Token: SeIncreaseQuotaPrivilege 604 WMIC.exe Token: SeSecurityPrivilege 604 WMIC.exe Token: SeTakeOwnershipPrivilege 604 WMIC.exe Token: SeLoadDriverPrivilege 604 WMIC.exe Token: SeSystemProfilePrivilege 604 WMIC.exe Token: SeSystemtimePrivilege 604 WMIC.exe Token: SeProfSingleProcessPrivilege 604 WMIC.exe Token: SeIncBasePriorityPrivilege 604 WMIC.exe Token: SeCreatePagefilePrivilege 604 WMIC.exe Token: SeBackupPrivilege 604 WMIC.exe Token: SeRestorePrivilege 604 WMIC.exe Token: SeShutdownPrivilege 604 WMIC.exe Token: SeDebugPrivilege 604 WMIC.exe Token: SeSystemEnvironmentPrivilege 604 WMIC.exe Token: SeRemoteShutdownPrivilege 604 WMIC.exe Token: SeUndockPrivilege 604 WMIC.exe Token: SeManageVolumePrivilege 604 WMIC.exe Token: 33 604 WMIC.exe Token: 34 604 WMIC.exe Token: 35 604 WMIC.exe Token: SeBackupPrivilege 2304 wbengine.exe Token: SeRestorePrivilege 2304 wbengine.exe Token: SeSecurityPrivilege 2304 wbengine.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 3000 wrote to memory of 2604 3000 7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe 28 PID 3000 wrote to memory of 2604 3000 7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe 28 PID 3000 wrote to memory of 2604 3000 7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe 28 PID 2604 wrote to memory of 1072 2604 Firefox Software Updator.exe 30 PID 2604 wrote to memory of 1072 2604 Firefox Software Updator.exe 30 PID 2604 wrote to memory of 1072 2604 Firefox Software Updator.exe 30 PID 1072 wrote to memory of 2508 1072 cmd.exe 32 PID 1072 wrote to memory of 2508 1072 cmd.exe 32 PID 1072 wrote to memory of 2508 1072 cmd.exe 32 PID 1072 wrote to memory of 604 1072 cmd.exe 35 PID 1072 wrote to memory of 604 1072 cmd.exe 35 PID 1072 wrote to memory of 604 1072 cmd.exe 35 PID 2604 wrote to memory of 1352 2604 Firefox Software Updator.exe 37 PID 2604 wrote to memory of 1352 2604 Firefox Software Updator.exe 37 PID 2604 wrote to memory of 1352 2604 Firefox Software Updator.exe 37 PID 1352 wrote to memory of 1624 1352 cmd.exe 39 PID 1352 wrote to memory of 1624 1352 cmd.exe 39 PID 1352 wrote to memory of 1624 1352 cmd.exe 39 PID 1352 wrote to memory of 1616 1352 cmd.exe 40 PID 1352 wrote to memory of 1616 1352 cmd.exe 40 PID 1352 wrote to memory of 1616 1352 cmd.exe 40 PID 2604 wrote to memory of 1520 2604 Firefox Software Updator.exe 41 PID 2604 wrote to memory of 1520 2604 Firefox Software Updator.exe 41 PID 2604 wrote to memory of 1520 2604 Firefox Software Updator.exe 41 PID 1520 wrote to memory of 2368 1520 cmd.exe 43 PID 1520 wrote to memory of 2368 1520 cmd.exe 43 PID 1520 wrote to memory of 2368 1520 cmd.exe 43 PID 2604 wrote to memory of 2488 2604 Firefox Software Updator.exe 47 PID 2604 wrote to memory of 2488 2604 Firefox Software Updator.exe 47 PID 2604 wrote to memory of 2488 2604 Firefox Software Updator.exe 47 -
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\7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe"C:\Users\Admin\AppData\Local\Temp\7e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3000 -
C:\Users\Admin\AppData\Roaming\Firefox Software Updator.exe"C:\Users\Admin\AppData\Roaming\Firefox Software Updator.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:2604 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1072 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:2508
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:604
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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:1352 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:1624
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1616
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1520 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2368
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2488
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2712
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2304
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2052
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵PID:3056
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
381KB
MD5ad284d8e19e16bb34a12648c219eff2d
SHA1d5371b5cbc05c75548112b2ab42b47b4a695ac0a
SHA2567e620a991e554e89cfdb7ca4b131e237cd9936bd14ef48dc52872e0793415135
SHA51224ff90ba62bab82fab76bc5f748a4fc13708a484fdebdc6320f068b8fc42da8723c6e0253fab1752e1ed8c3de8bfcbd8850c7bb1d7be6cd02a88c03a0b4c4b00
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Filesize
815B
MD5edba6fa07dacc53d145651c0c33dc6d8
SHA16f273258826c011a0da1c370c88871b8869fade6
SHA2564d95153cff46c7875258820e9b0c9229719ab4110a447961c44aaeecfdc0c91d
SHA5120a3bb4f3b03fa4b1ea4dd12184e2dad919f0751eaf8d30a0effcfd50b527cd688a2ed1aa294368c6e77639bb731328e0ee0203d8d01e8881164a7799f5814ae2