Analysis
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max time kernel
146s -
max time network
164s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
30-01-2024 05:44
Behavioral task
behavioral1
Sample
95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe
Resource
win10v2004-20231215-en
General
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Target
95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe
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Size
5.3MB
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MD5
79b6d4f066d1875b18de19ad54177fa7
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SHA1
d99188afd625268875b1050bd561a72c51d51d38
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SHA256
95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c
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SHA512
365ac763dfd0986ad06acfc6b5d6a1c124ec8816d5a5ddc05f4145a91bb6fd50b7e97b4fa3d309adfe4995f57375583c619d919ecdcc1b3c792cdef9e6414cd6
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SSDEEP
49152:CGUKMViI+OozP3w5C49ckglrOugdutUeUCyLQrO/LH:IK0iI+HPA
Malware Config
Signatures
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Jigsaw Ransomware
Ransomware family first created in 2016. Named based on wallpaper set after infection in the early versions.
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Renames multiple (244) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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UPX dump on OEP (original entry point) 6 IoCs
resource yara_rule behavioral2/memory/4292-0-0x0000000000400000-0x0000000000454000-memory.dmp UPX behavioral2/memory/4292-170-0x0000000000400000-0x0000000000454000-memory.dmp UPX behavioral2/files/0x0006000000023139-174.dat UPX behavioral2/files/0x0006000000023139-180.dat UPX behavioral2/memory/4336-184-0x0000000000400000-0x0000000000454000-memory.dmp UPX behavioral2/memory/4292-199-0x0000000000400000-0x0000000000454000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe -
Executes dropped EXE 1 IoCs
pid Process 4336 drpbx.exe -
resource yara_rule behavioral2/memory/4292-0-0x0000000000400000-0x0000000000454000-memory.dmp upx behavioral2/memory/4292-170-0x0000000000400000-0x0000000000454000-memory.dmp upx behavioral2/files/0x0006000000023139-174.dat upx behavioral2/files/0x0006000000023139-180.dat upx behavioral2/memory/4336-184-0x0000000000400000-0x0000000000454000-memory.dmp upx behavioral2/memory/4292-199-0x0000000000400000-0x0000000000454000-memory.dmp upx -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\firefox.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Frfx\\firefox.exe" 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe -
Drops desktop.ini file(s) 2 IoCs
description ioc Process File created C:\Windows\assembly\Desktop.ini 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe File opened for modification C:\Windows\assembly\Desktop.ini 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe -
Drops file in Program Files directory 64 IoCs
description ioc Process File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_x64__8wekyb3d8bbwe\BuildInfo.xml drpbx.exe File opened for modification C:\Program Files\PublishSuspend.ppsx drpbx.exe File opened for modification C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-3102-0000-1000-0000000FF1CE.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingWeather_4.25.20211.0_x64__8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsStore_11910.1002.5.0_x64__8wekyb3d8bbwe\VoiceCommands.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxApp_48.49.31001.0_x64__8wekyb3d8bbwe\networkmanifest.xml drpbx.exe File opened for modification C:\Program Files (x86)\Windows Media Player\Media Renderer\DMR_48.png drpbx.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-001F-0409-1000-0000000FF1CE.xml.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Advertising.Xaml_10.1808.3.0_x64__8wekyb3d8bbwe\logo.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_3.6.73.0_x64__8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsFeedbackHub_1.1907.3152.0_x64__8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\ku.txt drpbx.exe File created C:\Program Files\Java\jre-1.8\README.txt.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.22742.0_x64__8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\pt-br.txt drpbx.exe File opened for modification C:\Program Files\Windows Media Player\Media Renderer\connectionmanager_dmr.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsSoundRecorder_2019.716.2313.0_neutral_~_8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File created C:\Program Files\7-Zip\Lang\ar.txt.zemblax drpbx.exe File created C:\Program Files\7-Zip\Lang\el.txt.zemblax drpbx.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0018-0409-1000-0000000FF1CE.xml.zemblax drpbx.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-00A1-0409-1000-0000000FF1CE.xml.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1906.2182.0_neutral_split.scale-100_8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneMusic_10.19071.19011.0_neutral_split.scale-100_8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File created C:\Program Files\7-Zip\Lang\mng.txt.zemblax drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\tg.txt drpbx.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-002C-0409-1000-0000000FF1CE.xml.zemblax drpbx.exe File opened for modification C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-00A1-0409-1000-0000000FF1CE.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_16001.12026.20112.0_neutral_~_8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.20875.0_x64__8wekyb3d8bbwe\Third Party Notices.txt drpbx.exe File created C:\Program Files\7-Zip\Lang\ext.txt.zemblax drpbx.exe File created C:\Program Files\7-Zip\Lang\pt-br.txt.zemblax drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.22681.0_x64__8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File created C:\Program Files\7-Zip\Lang\tt.txt.zemblax drpbx.exe File opened for modification C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0090-0409-1000-0000000FF1CE.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingWeather_4.25.20211.0_neutral_~_8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.GetHelp_10.1706.13331.0_neutral_split.scale-125_8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_x64__kzf8qxf38zg5c\AppxBlockMap.xml drpbx.exe File created C:\Program Files\7-Zip\Lang\ja.txt.zemblax drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\sk.txt drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.GetHelp_10.1706.13331.0_x64__8wekyb3d8bbwe\VALoading.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Services.Store.Engagement_10.0.18101.0_x64__8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.VCLibs.140.00.UWPDesktop_14.0.27629.0_x64__8wekyb3d8bbwe\logo.png drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxGameOverlay_1.46.11001.0_neutral_split.scale-100_8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files (x86)\Microsoft.NET\RedistList\AssemblyList_4_client.xml drpbx.exe File opened for modification C:\Program Files (x86)\Windows Media Player\Media Renderer\DMR_120.png drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\si.txt drpbx.exe File opened for modification C:\Program Files\Java\jre-1.8\THIRDPARTYLICENSEREADME.txt drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.20875.0_neutral_split.scale-100_8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_2019.19071.12548.0_x64__8wekyb3d8bbwe\WebviewOffline.html drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\va.txt drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.GetHelp_10.1706.13331.0_neutral_~_8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_2019.125.2243.0_neutral_~_8wekyb3d8bbwe\AppxBlockMap.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.XboxIdentityProvider_12.50.6001.0_x64__8wekyb3d8bbwe\BuildInfo.xml drpbx.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0018-0000-1000-0000000FF1CE.xml.zemblax drpbx.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-001F-0C0A-1000-0000000FF1CE.xml.zemblax drpbx.exe File opened for modification C:\Program Files\Windows Media Player\Media Renderer\DMR_120.jpg drpbx.exe File created C:\Program Files\7-Zip\Lang\mng2.txt.zemblax drpbx.exe File opened for modification C:\Program Files\Java\jdk-1.8\javafx-src.zip drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\tt.txt drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.NET.Native.Runtime.2.2_2.2.27328.0_x64__8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.StorePurchaseApp_11811.1001.18.0_neutral_split.scale-100_8wekyb3d8bbwe\AppxManifest.xml drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\br.txt drpbx.exe File created C:\Program Files\7-Zip\Lang\is.txt.zemblax drpbx.exe File opened for modification C:\Program Files\7-Zip\Lang\kk.txt drpbx.exe -
Drops file in Windows directory 3 IoCs
description ioc Process File opened for modification C:\Windows\assembly 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe File created C:\Windows\assembly\Desktop.ini 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe File opened for modification C:\Windows\assembly\Desktop.ini 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4292 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe Token: SeDebugPrivilege 4336 drpbx.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4292 wrote to memory of 4336 4292 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe 86 PID 4292 wrote to memory of 4336 4292 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe 86 PID 4292 wrote to memory of 4336 4292 95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe"C:\Users\Admin\AppData\Local\Temp\95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4292 -
C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe"C:\Users\Admin\AppData\Local\Drpbx\drpbx.exe" C:\Users\Admin\AppData\Local\Temp\95b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c.exe2⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
PID:4336
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
5.3MB
MD579b6d4f066d1875b18de19ad54177fa7
SHA1d99188afd625268875b1050bd561a72c51d51d38
SHA25695b7cfcdbe25fce19e887510d5da55ffdff66b3ef6db7400977f9bb94f9fec2c
SHA512365ac763dfd0986ad06acfc6b5d6a1c124ec8816d5a5ddc05f4145a91bb6fd50b7e97b4fa3d309adfe4995f57375583c619d919ecdcc1b3c792cdef9e6414cd6
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Filesize
4.0MB
MD5b32f0e8fed8a89c1250f5e548c27aaa7
SHA18f6c091ebf41b757f9503895b607b46f9c7eb87d
SHA256d78c903bc4cf0c9a1a0280feeb4b16c0deb57382d2195307fcb48c21e052ff32
SHA512b45c86e08d4fed14c2b87c95d2c2890457a90d101158ebcfdd903ca1426b73bfb125e951c52373dd40b29d66d578add0657335b5b93cc79e7a3c3b8b65f94baa