Analysis
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max time kernel
142s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
21-05-2024 05:24
Behavioral task
behavioral1
Sample
STRI.jar
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
STRI.jar
Resource
win10v2004-20240426-en
General
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Target
STRI.jar
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Size
91KB
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MD5
555889a324de30d361c43d5dfd7f8602
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SHA1
5144a7265a9290a32bd6cd68b33a8a50083619af
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SHA256
9d00a5a5b9e7a5ec7649f732b8272e10f32ae2a70b4dff6822f366d4209d07fa
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SHA512
5e65b55c1286d5e783d9546270aaa2fe5e2e39349e20a92aba884fc139b25bd9886aa6211ebb3b052096a50d2a0e0ff83673f09e27b00a059d9da32d773d9922
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SSDEEP
1536:uW/Ibxe31wruTddk170K9EmFCdnzxPxy0IKJc0WOhYV9IJns7r+/QirOf9GfP:f+xNuQ17VK5xJy0VkOhFNs76hrQ9GfP
Malware Config
Extracted
strrat
173.212.199.134:1780
kimboy1.duckdns.org:1788
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license_id
khonsari
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plugins_url
http://jbfrost.live/strigoi/server/?hwid=1&lid=m&ht=5
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scheduled_task
true
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secondary_startup
true
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startup
true
Signatures
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Drops startup file 1 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\STRI.jar java.exe -
Loads dropped DLL 2 IoCs
pid Process 3212 java.exe 2904 java.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 3120 icacls.exe -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\STRI = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\STRI.jar\"" java.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\STRI = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\STRI.jar\"" java.exe -
Drops file in Program Files directory 1 IoCs
description ioc Process File created C:\Program Files\Java\jre-1.8\STRI.jar java.exe -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4376 schtasks.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 4684 wrote to memory of 3120 4684 java.exe 84 PID 4684 wrote to memory of 3120 4684 java.exe 84 PID 4684 wrote to memory of 3516 4684 java.exe 95 PID 4684 wrote to memory of 3516 4684 java.exe 95 PID 3516 wrote to memory of 3212 3516 java.exe 97 PID 3516 wrote to memory of 3212 3516 java.exe 97 PID 3212 wrote to memory of 960 3212 java.exe 99 PID 3212 wrote to memory of 960 3212 java.exe 99 PID 3212 wrote to memory of 2904 3212 java.exe 100 PID 3212 wrote to memory of 2904 3212 java.exe 100 PID 960 wrote to memory of 4376 960 cmd.exe 103 PID 960 wrote to memory of 4376 960 cmd.exe 103 -
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.
Processes
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C:\Program Files (x86)\Common Files\Oracle\Java\javapath\java.exejava -jar C:\Users\Admin\AppData\Local\Temp\STRI.jar1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4684 -
C:\Windows\system32\icacls.exeC:\Windows\system32\icacls.exe C:\ProgramData\Oracle\Java\.oracle_jre_usage /grant "everyone":(OI)(CI)M2⤵
- Modifies file permissions
PID:3120
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C:\Program Files\Java\jre-1.8\bin\java.exe"C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Program Files\Java\jre-1.8\STRI.jar"2⤵
- Suspicious use of WriteProcessMemory
PID:3516 -
C:\Program Files\Java\jre-1.8\bin\java.exe"C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\STRI.jar"3⤵
- Drops startup file
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3212 -
C:\Windows\SYSTEM32\cmd.execmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\STRI.jar"4⤵
- Suspicious use of WriteProcessMemory
PID:960 -
C:\Windows\system32\schtasks.exeschtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\STRI.jar"5⤵
- Creates scheduled task(s)
PID:4376
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C:\Program Files\Java\jre-1.8\bin\java.exe"C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\AppData\Roaming\STRI.jar"4⤵
- Loads dropped DLL
PID:2904
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
91KB
MD5555889a324de30d361c43d5dfd7f8602
SHA15144a7265a9290a32bd6cd68b33a8a50083619af
SHA2569d00a5a5b9e7a5ec7649f732b8272e10f32ae2a70b4dff6822f366d4209d07fa
SHA5125e65b55c1286d5e783d9546270aaa2fe5e2e39349e20a92aba884fc139b25bd9886aa6211ebb3b052096a50d2a0e0ff83673f09e27b00a059d9da32d773d9922
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Filesize
46B
MD5442b095b2a6fd132b4170db3c39c2bac
SHA1be3060eb81780a4dfe15e4a20fb8d183b7306015
SHA256de734860e211ca7485c321738aed91aba853b420634fd8f7d67199bf828f1a4e
SHA512e03afaec793e3f6286578f3f47d5cfdb0ea63c3408121cb869db70ed2c98e60366fdee5d5cbfcf70d32d63469a4e2c055cb0c92d4a99a956f64d1b738144811c
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Filesize
46B
MD5ceeb35d2c993da94af28b7e4027e3254
SHA11c0a76510a5486e624225c38fa1b8ce2fa9cb2bd
SHA256e0c6766f56b66e5b9ee0a8c75fd735cf5ef8921bc9261a2920d007cb9c7ca2b7
SHA51261bfb7b6a6f6593c986719cb68d4ac1793a4431dd17339270ff00827244bc69555ee58a60ffffdcd2d2ce4b07c9c276d5ebf879c50c620ff2280d817f0ffa024
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Filesize
241KB
MD5e02979ecd43bcc9061eb2b494ab5af50
SHA13122ac0e751660f646c73b10c4f79685aa65c545
SHA256a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a
SHA5121e6f7dcb6a557c9b896412a48dd017c16f7a52fa2b9ab513593c9ecd118e86083979821ca7a3e2f098ee349200c823c759cec6599740dd391cb5f354dc29b372
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C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-540404634-651139247-2967210625-1000\83aa4cc77f591dfc2374580bbd95f6ba_41e50f4a-4a76-42e1-a3df-51306e426307
Filesize45B
MD5c8366ae350e7019aefc9d1e6e6a498c6
SHA15731d8a3e6568a5f2dfbbc87e3db9637df280b61
SHA25611e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238
SHA51233c980d5a638bfc791de291ebf4b6d263b384247ab27f261a54025108f2f85374b579a026e545f81395736dd40fa4696f2163ca17640dd47f1c42bc9971b18cd
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Filesize
1.4MB
MD5acfb5b5fd9ee10bf69497792fd469f85
SHA10e0845217c4907822403912ad6828d8e0b256208
SHA256b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e
SHA512e52575f58a195ceb3bd16b9740eadf5bc5b1d4d63c0734e8e5fd1d1776aa2d068d2e4c7173b83803f95f72c0a6759ae1c9b65773c734250d4cfcdf47a19f82aa
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Filesize
2.6MB
MD52f4a99c2758e72ee2b59a73586a2322f
SHA1af38e7c4d0fc73c23ecd785443705bfdee5b90bf
SHA25624d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5
SHA512b860459a0d3bf7ccb600a03aa1d2ac0358619ee89b2b96ed723541e182b6fdab53aefef7992acb4e03fca67aa47cbe3907b1e6060a60b57ed96c4e00c35c7494
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Filesize
4.1MB
MD5b33387e15ab150a7bf560abdc73c3bec
SHA166b8075784131f578ef893fd7674273f709b9a4c
SHA2562eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491
SHA51225cfb0d6ce35d0bcb18527d3aa12c63ecb2d9c1b8b78805d1306e516c13480b79bb0d74730aa93bd1752f9ac2da9fdd51781c48844cea2fd52a06c62852c8279
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Filesize
772KB
MD5e1aa38a1e78a76a6de73efae136cdb3a
SHA1c463da71871f780b2e2e5dba115d43953b537daf
SHA2562ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609
SHA512fee16fe9364926ec337e52f551fd62ed81984808a847de2fd68ff29b6c5da0dcc04ef6d8977f0fe675662a7d2ea1065cdcdd2a5259446226a7c7c5516bd7d60d