Analysis
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max time kernel
210s -
max time network
181s -
platform
windows10-1703_x64 -
resource
win10-20230220-en -
resource tags
arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system -
submitted
02-06-2023 18:34
Static task
static1
Behavioral task
behavioral1
Sample
Fantom.exe
Resource
win10-20230220-en
Behavioral task
behavioral2
Sample
Fantom.exe
Resource
win7-20230220-en
Behavioral task
behavioral3
Sample
Fantom.exe
Resource
win10v2004-20230220-en
General
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Target
Fantom.exe
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Size
261KB
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MD5
7d80230df68ccba871815d68f016c282
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SHA1
e10874c6108a26ceedfc84f50881824462b5b6b6
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SHA256
f4234a501edcd30d3bc15c983692c9450383b73bdd310059405c5e3a43cc730b
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SHA512
64d02b3e7ed82a64aaac1f74c34d6b6e6feaac665ca9c08911b93eddcec66595687024ec576e74ea09a1193ace3923969c75de8733859835fef45335cf265540
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SSDEEP
3072:vDKW1LgppLRHMY0TBfJvjcTp5XxG8pt+oSOpE22obq+NYgvPuCEbMBWJxLRiUgV:vDKW1Lgbdl0TBBvjc/M8n35nYgvKjdzi
Malware Config
Extracted
C:\Program Files\7-Zip\Lang\DECRYPT_YOUR_FILES.HTML
Signatures
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Fantom
Ransomware which hides encryption process behind fake Windows Update screen.
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Renames multiple (1925) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Disables Task Manager via registry modification
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Executes dropped EXE 1 IoCs
pid Process 4792 WindowsUpdate.exe -
Drops file in Program Files directory 64 IoCs
description ioc Process File created C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\ThemeCreation\Effects\effects_lobby_stars.jpg Fantom.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft.NET\ADOMD.NET\130\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.BingWeather_4.18.56.0_x64__8wekyb3d8bbwe\Assets\Attribution\kweather.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.BingWeather_4.18.56.0_x64__8wekyb3d8bbwe\Microsoft.Msn.Controls\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\1937_36x36x32.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\large\th_60x42.png Fantom.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.equinox.p2.console.nl_ja_4.4.0.v20140623020002.jar Fantom.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesX86\Microsoft Analysis Services\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\VideoLAN\VLC\plugins\video_output\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\contrast-black\OneNoteSplashLogo.scale-300.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\small\gu_16x11.png Fantom.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] Fantom.exe File created C:\Program Files\VideoLAN\VLC\locale\cy\LC_MESSAGES\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\VideoLAN\VLC\locale\tl\LC_MESSAGES\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.3DBuilder_13.0.10349.0_x64__8wekyb3d8bbwe\Assets\Office\PlaneCutKeepBottom.scale-100.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\Icons\retry_icon.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\7739_32x32x32.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Emoticons\large\rain.png Fantom.exe File opened for modification C:\Program Files\Microsoft Office\root\Integration\C2RManifest.proofing.msi.16.en-us.xml Fantom.exe File created C:\Program Files\Microsoft Office\root\Templates\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.BingWeather_4.18.56.0_x64__8wekyb3d8bbwe\Assets\AppTiles\WeatherIcons\30x30\172.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\OneNoteSectionGroupMedTile.scale-150.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.People_10.1.10531.0_neutral_split.scale-100_8wekyb3d8bbwe\microsoft.system.package.metadata\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\en-us\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.3DBuilder_13.0.10349.0_x64__8wekyb3d8bbwe\Assets\Office\Print.scale-100.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\976_48x48x32.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_neutral_split.scale-125_kzf8qxf38zg5c\SkypeApp\Assets\SkypeLargeTile.scale-125_contrast-black.png Fantom.exe File created C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\de\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.BingWeather_4.18.56.0_neutral_split.scale-150_8wekyb3d8bbwe\Assets\AppTiles\StoreLogo.scale-150.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.3DBuilder_13.0.10349.0_x64__8wekyb3d8bbwe\Assets\CameraIcon_contrast-black.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.Getstarted_4.5.6.0_x64__8wekyb3d8bbwe\Assets\GetStartedAppList.targetsize-256_altform-unplated_contrast-white.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Arkadium.Win10.Xaml.Toolkit\Assets\MicrosoftLogo.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\Icons\icon_hint.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\large\gu_60x42.png Fantom.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\plugins\org.eclipse.e4.ui.di_1.0.0.v20140328-2112.jar Fantom.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] Fantom.exe File created C:\Program Files\VideoLAN\VLC\locale\hr\LC_MESSAGES\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsStore_11701.1001.87.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\AppTiles\contrast-black\DECRYPT_YOUR_FILES.HTML Fantom.exe File opened for modification C:\Program Files\Java\jdk1.8.0_66\lib\visualvm\platform\config\Modules\org-netbeans-core.xml Fantom.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogoSmall.contrast-white_scale-100.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\TMP_tournament_trophy_blue.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\Buttons\TryAgain\TryAgain-up.mobile.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.OneConnect_2.1701.277.0_x64__8wekyb3d8bbwe\Assets\OneConnectAppList.targetsize-96.png Fantom.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\NewComment.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.BingWeather_4.18.56.0_x64__8wekyb3d8bbwe\Assets\AppTiles\WeatherImages\210x173\29.jpg Fantom.exe File opened for modification C:\Program Files\Microsoft Office\root\Templates\1033\LoanAmortization.xltx Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\Awards\challenge\Go-for_the_Gold_Unearned_small.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.People_2017.222.1920.0_neutral_~_8wekyb3d8bbwe\AppxMetadata\DECRYPT_YOUR_FILES.HTML Fantom.exe File opened for modification C:\Program Files\7-Zip\License.txt Fantom.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\Edit.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.MSPaint_1.1702.28017.0_x64__8wekyb3d8bbwe\Assets\Images\Stickers\Thumbnails\Sticker_Icon_Speech_Bubble.png Fantom.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RHeartbeatConfig.xml Fantom.exe File created C:\Program Files\Java\jdk1.8.0_66\jre\bin\server\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\large\do_60x42.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\Tournament\GameModeSpider.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Emoticons\small\heidy.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\large\bz_60x42.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\large\ng_60x42.png Fantom.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\en\DECRYPT_YOUR_FILES.HTML Fantom.exe File created C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.ZuneMusic_10.16112.11621.0_neutral_resources.scale-200_8wekyb3d8bbwe\Assets\iheart-radio.scale-200.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\large\cv_60x42.png Fantom.exe File opened for modification C:\Program Files\Java\jre1.8.0_66\lib\charsets.jar Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_1.4.101.0_x64__8wekyb3d8bbwe\Assets\Square150x150Logo.scale-200.png Fantom.exe File created C:\Program Files\WindowsApps\Microsoft.3DBuilder_13.0.10349.0_x64__8wekyb3d8bbwe\Assets\manifestAssets\Square71x71Logo.scale-100.png Fantom.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 3532 Fantom.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3532 Fantom.exe -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3532 wrote to memory of 4792 3532 Fantom.exe 70 PID 3532 wrote to memory of 4792 3532 Fantom.exe 70
Processes
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C:\Users\Admin\AppData\Local\Temp\Fantom.exe"C:\Users\Admin\AppData\Local\Temp\Fantom.exe"1⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3532 -
C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe"C:\Users\Admin\AppData\Local\Temp\WindowsUpdate.exe"2⤵
- Executes dropped EXE
PID:4792
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:3424
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1KB
MD571527de849faaf210bacf9d2ad2dc271
SHA1f5b53143621910fbf076e1976fabdc2bf5eee197
SHA256f2f9e1da83a94cacdac3f7bd1ada8dd5668596505525e6a7763526fd2244fe57
SHA5121d638601961e6eda43a04b7ff0749bb31952ff9cb6d6316513885069c8946ee4fb238c1ed7eaf3192a74926d0669572ae27cad3188c4df54a1f6cfd2cc99e310
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Filesize
160B
MD5812125c306e9be575c21783edeca1bd2
SHA1c6aa0168fb2c612b717ec6943fe3ff2d22cff000
SHA256f4dfe6e99a91bf28c86b11511da328cbc4a0dcf2546d03b3e719419477489d64
SHA51207b56e1859d376139f2ffbc6650b1e5fceda64fa4580c948897ef684ef671cabb7d3b31b09e160fb817eb8ac07887eae610a6722883633f8cdf17676ddc8b735
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C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.ecf.core.ssl.feature_1.0.0.v20140827-1444\epl-v10.html
Filesize12KB
MD575ceab4531b5ea12d1a611678fbb2d2c
SHA1842c5088b00b4b86f568ed1dc667781c323e27d0
SHA25633ce1b31478c3ff3f2fa743f584154216dbde40424d4d5d3157917a4d559e067
SHA5124522ee56ec8836f6ac4d436f5d05cd34d904e9b0d70cc3f66176eda17b1724f63146b260ba2c3b4bdc256602e35bb5e5135e129072e8b298fdaeb9cf7fa5d21e
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C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.ecf.core.ssl.feature_1.0.0.v20140827-1444\license.html
Filesize8KB
MD514e6908ab549efb6ebd46043f166f011
SHA1bfe11d7d1f9db31c44b9ad265c5e032c72a192a9
SHA256d9cc9df22f20e0b6330d8072e36d1d63fb10178d78d0f43d0c9726d820a81cdd
SHA5121cf17ddcb6694ff9f2e106c36d18628389f826ad8bb689fd19b9bfb41ca23789e2a043c54192275a575ae135c62c8543f19525ea6c7603d69b72d11e2696adba
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C:\Program Files\Java\jdk1.8.0_66\lib\missioncontrol\features\org.eclipse.ecf.filetransfer.httpclient4.ssl.feature_1.0.0.v20140827-1444\asl-v20.txt
Filesize11KB
MD57e7eb3a10f35f4bb62b2216d8fdad563
SHA1ea12f5038d78d95602e030cda7dc2547abbc774b
SHA2562bac3e1d4d5d78cd4a9aabed42c3f8848f32246a7f177ab93d0034b3e899e547
SHA512faaa9e015d09767c777367427dace07570418a08013a25fe291fb7eaee32ef044e1cd5d3642ccaa5cf439bba32978ce196c6ad4967d794841a4f8527035c27d2
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Filesize
107KB
MD546828f7f1f2515c6038be53e18ea65eb
SHA1986cded479b82e7195cd2ae735bab84597654220
SHA25604927f15089800e75b60a983a66c2b070c35158c95e40d4da872d07805394dec
SHA51219908d9b14abe8c794df7558cb17ae65265a083760f1101909caad7633e9d72e52c4bcacc08a0ec9d06f25dbb3423f8588a2723220b6d207f1f84866f0157d5c
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Filesize
172KB
MD572d09d2f14eddc03db2d3c6919a78e2f
SHA13da1a6ed8ba021b19dfac7335e9755a7be172748
SHA25602fdbcfb9e86be63bb67ce773f4f61058dd3fb0b132072161a4df9dfcf20183b
SHA512c27616a5f0079c6c480923d75ac7521086b17099f63040e3a4ff1bdec827052a1fd58894bd4c49c58db18001ac060b8160b284d6c252a4106e514585413a605d
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Filesize
48B
MD5861cf0eeb0134431c3738c42fe426668
SHA15ef10fecb2a5775ab77371fc1e091b07bc1e0baf
SHA256e7ef7694055ca08c017bdf594d51e4c08ce51b65903df85793af5973592e65e7
SHA512611715fef562da63e9f4992d1f86bd992c622708c0ebbff871b3e9e55e8a42fca5d6cfb647ca0995bb823ac7484feac3c4cd16c79cbbf89dffe843f0818eeba6
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Filesize
21KB
MD5fec89e9d2784b4c015fed6f5ae558e08
SHA1581fd9fb59bd42fbe7bd065cf0e6ff6d4d0daba2
SHA256489f2546a4ad1e0e0147d1ca2fd8801785689f67fb850171ccbaa6306a152065
SHA512e3bbf89cc0a955a2819455137e540952c55f417732a596ef314a46d5312b3bed644ac7595f75d3639ebc30e85f0f210dba0ef5b013d1b83bafd2c17a9d685a24
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Filesize
21KB
MD5fec89e9d2784b4c015fed6f5ae558e08
SHA1581fd9fb59bd42fbe7bd065cf0e6ff6d4d0daba2
SHA256489f2546a4ad1e0e0147d1ca2fd8801785689f67fb850171ccbaa6306a152065
SHA512e3bbf89cc0a955a2819455137e540952c55f417732a596ef314a46d5312b3bed644ac7595f75d3639ebc30e85f0f210dba0ef5b013d1b83bafd2c17a9d685a24