Analysis
- max time kernel
145s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system - submitted
23/09/2024, 14:06
Static task
static1
Behavioral task
behavioral1
Sample
Tax Returns of R38,765.js
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
Tax Returns of R38,765.js
Resource
win10v2004-20240802-en
General
- Target Tax Returns of R38,765.js
- Size 747KB
- Sample240923-reeh8syblk
- SHA256 546b59d194d0ac048683cdab497999d37c35faa0963ff5fc29ba45213f5b06fd
- MD5 aec675686e9a47abf1026ed8dcf85172
- SHA1 2b312c1d0bc6337fc4df54b3a3a5be13826abe31
- SHA512 396bd76e0c5606ad8e8b58b13ebade55fb1046060ac676871cb73fb59e0059fc7ee14022a666ac1c40972a2317a027a35c884433b8f4e6bf4504cd104aa313e7
- SSDEEP 768:HQ9LkBoWpiK6th3rC5VWqJKOgTE+t0PpK6kXb7KmjggRiz9faAqB4U6Ige5TPaHL:HQcOqFRQJs1xXGC1z/b
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- 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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation wscript.exe - Drops startup file 1 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\gvafjy.txt java.exe - Loads dropped DLL 2 IoCs
pid Process 1324 java.exe 4880 java.exe - Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gvafjy = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\gvafjy.txt\"" java.exe Set value (str) \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gvafjy = "\"C:\\Program Files\\Java\\jre-1.8\\bin\\javaw.exe\" -jar \"C:\\Users\\Admin\\AppData\\Roaming\\gvafjy.txt\"" java.exe - Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 29 ip-api.com - Command and Scripting Interpreter: JavaScript 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4336 schtasks.exe - Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeIncreaseQuotaPrivilege 2532 WMIC.exe Token: SeSecurityPrivilege 2532 WMIC.exe Token: SeTakeOwnershipPrivilege 2532 WMIC.exe Token: SeLoadDriverPrivilege 2532 WMIC.exe Token: SeSystemProfilePrivilege 2532 WMIC.exe Token: SeSystemtimePrivilege 2532 WMIC.exe Token: SeProfSingleProcessPrivilege 2532 WMIC.exe Token: SeIncBasePriorityPrivilege 2532 WMIC.exe Token: SeCreatePagefilePrivilege 2532 WMIC.exe Token: SeBackupPrivilege 2532 WMIC.exe Token: SeRestorePrivilege 2532 WMIC.exe Token: SeShutdownPrivilege 2532 WMIC.exe Token: SeDebugPrivilege 2532 WMIC.exe Token: SeSystemEnvironmentPrivilege 2532 WMIC.exe Token: SeRemoteShutdownPrivilege 2532 WMIC.exe Token: SeUndockPrivilege 2532 WMIC.exe Token: SeManageVolumePrivilege 2532 WMIC.exe Token: 33 2532 WMIC.exe Token: 34 2532 WMIC.exe Token: 35 2532 WMIC.exe Token: 36 2532 WMIC.exe Token: SeIncreaseQuotaPrivilege 2532 WMIC.exe Token: SeSecurityPrivilege 2532 WMIC.exe Token: SeTakeOwnershipPrivilege 2532 WMIC.exe Token: SeLoadDriverPrivilege 2532 WMIC.exe Token: SeSystemProfilePrivilege 2532 WMIC.exe Token: SeSystemtimePrivilege 2532 WMIC.exe Token: SeProfSingleProcessPrivilege 2532 WMIC.exe Token: SeIncBasePriorityPrivilege 2532 WMIC.exe Token: SeCreatePagefilePrivilege 2532 WMIC.exe Token: SeBackupPrivilege 2532 WMIC.exe Token: SeRestorePrivilege 2532 WMIC.exe Token: SeShutdownPrivilege 2532 WMIC.exe Token: SeDebugPrivilege 2532 WMIC.exe Token: SeSystemEnvironmentPrivilege 2532 WMIC.exe Token: SeRemoteShutdownPrivilege 2532 WMIC.exe Token: SeUndockPrivilege 2532 WMIC.exe Token: SeManageVolumePrivilege 2532 WMIC.exe Token: 33 2532 WMIC.exe Token: 34 2532 WMIC.exe Token: 35 2532 WMIC.exe Token: 36 2532 WMIC.exe Token: SeIncreaseQuotaPrivilege 2596 WMIC.exe Token: SeSecurityPrivilege 2596 WMIC.exe Token: SeTakeOwnershipPrivilege 2596 WMIC.exe Token: SeLoadDriverPrivilege 2596 WMIC.exe Token: SeSystemProfilePrivilege 2596 WMIC.exe Token: SeSystemtimePrivilege 2596 WMIC.exe Token: SeProfSingleProcessPrivilege 2596 WMIC.exe Token: SeIncBasePriorityPrivilege 2596 WMIC.exe Token: SeCreatePagefilePrivilege 2596 WMIC.exe Token: SeBackupPrivilege 2596 WMIC.exe Token: SeRestorePrivilege 2596 WMIC.exe Token: SeShutdownPrivilege 2596 WMIC.exe Token: SeDebugPrivilege 2596 WMIC.exe Token: SeSystemEnvironmentPrivilege 2596 WMIC.exe Token: SeRemoteShutdownPrivilege 2596 WMIC.exe Token: SeUndockPrivilege 2596 WMIC.exe Token: SeManageVolumePrivilege 2596 WMIC.exe Token: 33 2596 WMIC.exe Token: 34 2596 WMIC.exe Token: 35 2596 WMIC.exe Token: 36 2596 WMIC.exe Token: SeIncreaseQuotaPrivilege 2596 WMIC.exe - Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4944 wrote to memory of 1528 4944 wscript.exe 82 PID 4944 wrote to memory of 1528 4944 wscript.exe 82 PID 1528 wrote to memory of 1324 1528 javaw.exe 83 PID 1528 wrote to memory of 1324 1528 javaw.exe 83 PID 1324 wrote to memory of 2584 1324 java.exe 87 PID 1324 wrote to memory of 2584 1324 java.exe 87 PID 1324 wrote to memory of 4880 1324 java.exe 88 PID 1324 wrote to memory of 4880 1324 java.exe 88 PID 2584 wrote to memory of 4336 2584 cmd.exe 91 PID 2584 wrote to memory of 4336 2584 cmd.exe 91 PID 4880 wrote to memory of 1916 4880 java.exe 94 PID 4880 wrote to memory of 1916 4880 java.exe 94 PID 1916 wrote to memory of 2532 1916 cmd.exe 96 PID 1916 wrote to memory of 2532 1916 cmd.exe 96 PID 4880 wrote to memory of 4416 4880 java.exe 97 PID 4880 wrote to memory of 4416 4880 java.exe 97 PID 4416 wrote to memory of 2596 4416 cmd.exe 99 PID 4416 wrote to memory of 2596 4416 cmd.exe 99 PID 4880 wrote to memory of 2424 4880 java.exe 100 PID 4880 wrote to memory of 2424 4880 java.exe 100 PID 2424 wrote to memory of 3900 2424 cmd.exe 102 PID 2424 wrote to memory of 3900 2424 cmd.exe 102 PID 4880 wrote to memory of 2504 4880 java.exe 103 PID 4880 wrote to memory of 2504 4880 java.exe 103 PID 2504 wrote to memory of 3776 2504 cmd.exe 105 PID 2504 wrote to memory of 3776 2504 cmd.exe 105 - 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
-
C:\Windows\system32\wscript.exewscript.exe "C:\Users\Admin\AppData\Local\Temp\Tax Returns of R38,765.js"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4944 -
C:\Program Files\Java\jre-1.8\bin\javaw.exe"C:\Program Files\Java\jre-1.8\bin\javaw.exe" -jar "C:\Users\Admin\AppData\Roaming\gvafjy.txt"2⤵
- Suspicious use of WriteProcessMemory
PID:1528 -
C:\Program Files\Java\jre-1.8\bin\java.exe"C:\Program Files\Java\jre-1.8\bin\java.exe" -jar "C:\Users\Admin\gvafjy.txt"3⤵
- Drops startup file
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1324 -
C:\Windows\SYSTEM32\cmd.execmd /c schtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\gvafjy.txt"4⤵
- Suspicious use of WriteProcessMemory
PID:2584 -
C:\Windows\system32\schtasks.exeschtasks /create /sc minute /mo 30 /tn Skype /tr "C:\Users\Admin\AppData\Roaming\gvafjy.txt"5⤵
- Scheduled Task/Job: Scheduled Task
PID:4336
-
-
-
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\gvafjy.txt"4⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4880 -
C:\Windows\SYSTEM32\cmd.execmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list"5⤵
- Suspicious use of WriteProcessMemory
PID:1916 -
C:\Windows\System32\Wbem\WMIC.exewmic /node:. /namespace:'\\root\cimv2' path win32_logicaldisk get volumeserialnumber /format:list6⤵
- Suspicious use of AdjustPrivilegeToken
PID:2532
-
-
-
C:\Windows\SYSTEM32\cmd.execmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list"5⤵
- Suspicious use of WriteProcessMemory
PID:4416 -
C:\Windows\System32\Wbem\WMIC.exewmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get caption,OSArchitecture /format:list6⤵
- Suspicious use of AdjustPrivilegeToken
PID:2596
-
-
-
C:\Windows\SYSTEM32\cmd.execmd.exe /c "wmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list"5⤵
- Suspicious use of WriteProcessMemory
PID:2424 -
C:\Windows\System32\Wbem\WMIC.exewmic /node:. /namespace:'\\root\cimv2' path win32_operatingsystem get version /format:list6⤵PID:3900
-
-
-
C:\Windows\SYSTEM32\cmd.execmd.exe /c "wmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list"5⤵
- Suspicious use of WriteProcessMemory
PID:2504 -
C:\Windows\System32\Wbem\WMIC.exewmic /node:localhost /namespace:'\\root\securitycenter2' path antivirusproduct get displayname /format:list6⤵PID:3776
-
-
-
-
-
Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1JavaScript
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
- Path C:\Users\Admin\AppData\Local\Temp\jna-63116079\jna4174564466695271380.dll
- Size 241KB
- SHA256 a66959bec2ef5af730198db9f3b3f7cab0d4ae70ce01bec02bf1d738e6d1ee7a
- MD5 e02979ecd43bcc9061eb2b494ab5af50
- SHA1 3122ac0e751660f646c73b10c4f79685aa65c545
- SHA512 1e6f7dcb6a557c9b896412a48dd017c16f7a52fa2b9ab513593c9ecd118e86083979821ca7a3e2f098ee349200c823c759cec6599740dd391cb5f354dc29b372
- SSDEEP 6144:YW2uuBVCg2ZF0xk5udHB7EkAgEEz2Lh2LDh+MDWHNaL7yyubjmiy9NBW:YW2uAC9sVEZL0vdnz
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21-786284298-625481688-3210388970-1000\83aa4cc77f591dfc2374580bbd95f6ba_1b74ca46-c49b-4c52-a57d-8cd1ff70c625
- Size 45B
- SHA256 11e6aca8e682c046c83b721eeb5c72c5ef03cb5936c60df6f4993511ddc61238
- MD5 c8366ae350e7019aefc9d1e6e6a498c6
- SHA1 5731d8a3e6568a5f2dfbbc87e3db9637df280b61
- SHA512 33c980d5a638bfc791de291ebf4b6d263b384247ab27f261a54025108f2f85374b579a026e545f81395736dd40fa4696f2163ca17640dd47f1c42bc9971b18cd
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Roaming\gvafjy.txt
- Size 92KB
- SHA256 e14f1c7e11a1f1ddd570d605e4204a694a7370d603c1b1ca157e505f180ccc48
- MD5 2cc7e15396dc275497fcf51f461da38d
- SHA1 6fa0f11b6d9e3812a86ff1d43a86ad34bfc41062
- SHA512 daf71473c48f9592d33a49ff2f6d7b84e2c3a992f18a29979494cae86623328f0137c6ae9046cf3bbeb75d90d2a030d1fdbf3aca8718ea769429ce1e6e4a931f
- SSDEEP 1536:we//1APYP119QV1+jG4cRtnGS2Ps0470ipLeejtTNDJheJdGHGvavxTpSHrsn:weaPYP1rQajoGfPR4Ai9eepToJdfvPLE
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\lib\jna-5.5.0.jar
- Size 1.4MB
- SHA256 b308faebfe4ed409de8410e0a632d164b2126b035f6eacff968d3908cafb4d9e
- MD5 acfb5b5fd9ee10bf69497792fd469f85
- SHA1 0e0845217c4907822403912ad6828d8e0b256208
- SHA512 e52575f58a195ceb3bd16b9740eadf5bc5b1d4d63c0734e8e5fd1d1776aa2d068d2e4c7173b83803f95f72c0a6759ae1c9b65773c734250d4cfcdf47a19f82aa
- SSDEEP 24576:BggLnybolJdaW+864NkqCUer8N7sSFOaj5lWOEMIKk6idJRWPTgzq3bICEz2lFO:BTnybo9aW+L5qCUO0xsiMPZrJgPLLIO6
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\lib\jna-platform-5.5.0.jar
- Size 2.6MB
- SHA256 24d81621f82ac29fcdd9a74116031f5907a2343158e616f4573bbfa2434ae0d5
- MD5 2f4a99c2758e72ee2b59a73586a2322f
- SHA1 af38e7c4d0fc73c23ecd785443705bfdee5b90bf
- SHA512 b860459a0d3bf7ccb600a03aa1d2ac0358619ee89b2b96ed723541e182b6fdab53aefef7992acb4e03fca67aa47cbe3907b1e6060a60b57ed96c4e00c35c7494
- SSDEEP 24576:DyciOooDbK7Yw1J75n4BP/NtK2ov3mhDR6:3iOLDOZJ75nwtK2ovWh8
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\lib\sqlite-jdbc-3.14.2.1.jar
- Size 4.1MB
- SHA256 2eae3dea1c3dde6104c49f9601074b6038ff6abcf3be23f4b56f6720a4f6a491
- MD5 b33387e15ab150a7bf560abdc73c3bec
- SHA1 66b8075784131f578ef893fd7674273f709b9a4c
- SHA512 25cfb0d6ce35d0bcb18527d3aa12c63ecb2d9c1b8b78805d1306e516c13480b79bb0d74730aa93bd1752f9ac2da9fdd51781c48844cea2fd52a06c62852c8279
- SSDEEP 98304:czJoX0izQbrabWo2MxgErRYxFOY8IsFWyTIiTIzMpca:cJoXHQKW9MxRr8wZZsikzMaa
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\lib\system-hook-3.5.jar
- Size 772KB
- SHA256 2ddda8af6faef8bde46acf43ec546603180bcf8dcb2e5591fff8ac9cd30b5609
- MD5 e1aa38a1e78a76a6de73efae136cdb3a
- SHA1 c463da71871f780b2e2e5dba115d43953b537daf
- SHA512 fee16fe9364926ec337e52f551fd62ed81984808a847de2fd68ff29b6c5da0dcc04ef6d8977f0fe675662a7d2ea1065cdcdd2a5259446226a7c7c5516bd7d60d
- SSDEEP 24576:IhCFW8WXvOsWW9XGmvcVfkfTnzrLvadKPpv:IhCYWstW202t
- MD5 SHA1 SHA512 SSDEEP