Analysis
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max time kernel
36s -
max time network
36s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
15-09-2024 18:10
Static task
static1
Behavioral task
behavioral1
Sample
Stellar.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
Stellar.exe
Resource
win10v2004-20240802-en
General
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Target
Stellar.exe
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Size
2.4MB
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MD5
d68dba883125d1a3408e13b84a3524e1
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SHA1
b613717517240829d8c28242a3b2ec7c6576b3f3
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SHA256
cc92146cb6e5e514c4bae54ced9f4bf6724b6b8b370f2f6d219aa5b0f95390ba
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SHA512
bad82130be599397e7a58a80d8301618fd35787c8d7bf5c1ae0d2cd00f92613265cabd9678c7dcd3e4fe8251a2636b14bdc7d0c0f29e383ae54b5dcf08b30de3
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SSDEEP
49152:vMkygnW2WnCzXzf7UPrn2Xb0ThRyUB1CP/yOuUaL4EgfGs3:t7nW2eCzjf7EnNvyCCZeLOG4
Malware Config
Extracted
xworm
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Install_directory
%ProgramData%
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install_file
USB.exe
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pastebin_url
https://pastebin.com/raw/LsuynkUz
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Detect Xworm Payload 2 IoCs
resource yara_rule behavioral1/files/0x000700000001ac0e-13.dat family_xworm behavioral1/memory/2764-18-0x00000000007D0000-0x00000000007E6000-memory.dmp family_xworm -
AgentTesla payload 2 IoCs
resource yara_rule behavioral1/files/0x000800000001ac0b-24.dat family_agenttesla behavioral1/memory/4344-27-0x0000000005CB0000-0x0000000005EC2000-memory.dmp family_agenttesla -
Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 2456 powershell.exe 4220 powershell.exe 4432 powershell.exe 1820 powershell.exe -
Drops startup file 2 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\AdobeIPC.lnk AdobeIPC.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\AdobeIPC.lnk AdobeIPC.exe -
Executes dropped EXE 3 IoCs
pid Process 4344 Stellar Generator.exe 2764 AdobeIPC.exe 2716 AdobeIPC -
Loads dropped DLL 2 IoCs
pid Process 4344 Stellar Generator.exe 4344 Stellar Generator.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-873560699-1074803302-2326074425-1000\Software\Microsoft\Windows\CurrentVersion\Run\AdobeIPC = "C:\\ProgramData\\AdobeIPC" AdobeIPC.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
flow ioc 1 pastebin.com 2 pastebin.com 4 pastebin.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Stellar Generator.exe -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS Stellar Generator.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer Stellar Generator.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion Stellar Generator.exe -
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 4324 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 4432 powershell.exe 4432 powershell.exe 4432 powershell.exe 1820 powershell.exe 1820 powershell.exe 1820 powershell.exe 2456 powershell.exe 2456 powershell.exe 2456 powershell.exe 4220 powershell.exe 4220 powershell.exe 4220 powershell.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe 2764 AdobeIPC.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2764 AdobeIPC.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 2764 AdobeIPC.exe Token: SeDebugPrivilege 4432 powershell.exe Token: SeIncreaseQuotaPrivilege 4432 powershell.exe Token: SeSecurityPrivilege 4432 powershell.exe Token: SeTakeOwnershipPrivilege 4432 powershell.exe Token: SeLoadDriverPrivilege 4432 powershell.exe Token: SeSystemProfilePrivilege 4432 powershell.exe Token: SeSystemtimePrivilege 4432 powershell.exe Token: SeProfSingleProcessPrivilege 4432 powershell.exe Token: SeIncBasePriorityPrivilege 4432 powershell.exe Token: SeCreatePagefilePrivilege 4432 powershell.exe Token: SeBackupPrivilege 4432 powershell.exe Token: SeRestorePrivilege 4432 powershell.exe Token: SeShutdownPrivilege 4432 powershell.exe Token: SeDebugPrivilege 4432 powershell.exe Token: SeSystemEnvironmentPrivilege 4432 powershell.exe Token: SeRemoteShutdownPrivilege 4432 powershell.exe Token: SeUndockPrivilege 4432 powershell.exe Token: SeManageVolumePrivilege 4432 powershell.exe Token: 33 4432 powershell.exe Token: 34 4432 powershell.exe Token: 35 4432 powershell.exe Token: 36 4432 powershell.exe Token: SeDebugPrivilege 1820 powershell.exe Token: SeIncreaseQuotaPrivilege 1820 powershell.exe Token: SeSecurityPrivilege 1820 powershell.exe Token: SeTakeOwnershipPrivilege 1820 powershell.exe Token: SeLoadDriverPrivilege 1820 powershell.exe Token: SeSystemProfilePrivilege 1820 powershell.exe Token: SeSystemtimePrivilege 1820 powershell.exe Token: SeProfSingleProcessPrivilege 1820 powershell.exe Token: SeIncBasePriorityPrivilege 1820 powershell.exe Token: SeCreatePagefilePrivilege 1820 powershell.exe Token: SeBackupPrivilege 1820 powershell.exe Token: SeRestorePrivilege 1820 powershell.exe Token: SeShutdownPrivilege 1820 powershell.exe Token: SeDebugPrivilege 1820 powershell.exe Token: SeSystemEnvironmentPrivilege 1820 powershell.exe Token: SeRemoteShutdownPrivilege 1820 powershell.exe Token: SeUndockPrivilege 1820 powershell.exe Token: SeManageVolumePrivilege 1820 powershell.exe Token: 33 1820 powershell.exe Token: 34 1820 powershell.exe Token: 35 1820 powershell.exe Token: 36 1820 powershell.exe Token: SeDebugPrivilege 2456 powershell.exe Token: SeDebugPrivilege 4344 Stellar Generator.exe Token: SeIncreaseQuotaPrivilege 2456 powershell.exe Token: SeSecurityPrivilege 2456 powershell.exe Token: SeTakeOwnershipPrivilege 2456 powershell.exe Token: SeLoadDriverPrivilege 2456 powershell.exe Token: SeSystemProfilePrivilege 2456 powershell.exe Token: SeSystemtimePrivilege 2456 powershell.exe Token: SeProfSingleProcessPrivilege 2456 powershell.exe Token: SeIncBasePriorityPrivilege 2456 powershell.exe Token: SeCreatePagefilePrivilege 2456 powershell.exe Token: SeBackupPrivilege 2456 powershell.exe Token: SeRestorePrivilege 2456 powershell.exe Token: SeShutdownPrivilege 2456 powershell.exe Token: SeDebugPrivilege 2456 powershell.exe Token: SeSystemEnvironmentPrivilege 2456 powershell.exe Token: SeRemoteShutdownPrivilege 2456 powershell.exe Token: SeUndockPrivilege 2456 powershell.exe Token: SeManageVolumePrivilege 2456 powershell.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2764 AdobeIPC.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 164 wrote to memory of 4344 164 Stellar.exe 74 PID 164 wrote to memory of 4344 164 Stellar.exe 74 PID 164 wrote to memory of 4344 164 Stellar.exe 74 PID 164 wrote to memory of 2764 164 Stellar.exe 75 PID 164 wrote to memory of 2764 164 Stellar.exe 75 PID 2764 wrote to memory of 4432 2764 AdobeIPC.exe 76 PID 2764 wrote to memory of 4432 2764 AdobeIPC.exe 76 PID 2764 wrote to memory of 1820 2764 AdobeIPC.exe 79 PID 2764 wrote to memory of 1820 2764 AdobeIPC.exe 79 PID 2764 wrote to memory of 2456 2764 AdobeIPC.exe 81 PID 2764 wrote to memory of 2456 2764 AdobeIPC.exe 81 PID 2764 wrote to memory of 4220 2764 AdobeIPC.exe 83 PID 2764 wrote to memory of 4220 2764 AdobeIPC.exe 83 PID 2764 wrote to memory of 4324 2764 AdobeIPC.exe 85 PID 2764 wrote to memory of 4324 2764 AdobeIPC.exe 85 -
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:\Users\Admin\AppData\Local\Temp\Stellar.exe"C:\Users\Admin\AppData\Local\Temp\Stellar.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:164 -
C:\ProgramData\Stellar Generator.exe"C:\ProgramData\Stellar Generator.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:4344
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C:\ProgramData\AdobeIPC.exe"C:\ProgramData\AdobeIPC.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2764 -
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\AdobeIPC.exe'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4432
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'AdobeIPC.exe'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1820
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\AdobeIPC'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2456
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'AdobeIPC'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
PID:4220
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C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "AdobeIPC" /tr "C:\ProgramData\AdobeIPC"3⤵
- Scheduled Task/Job: Scheduled Task
PID:4324
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C:\ProgramData\AdobeIPCC:\ProgramData\AdobeIPC1⤵
- Executes dropped EXE
PID:2716
Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
65KB
MD51f1441f1cc6080cf821cfda93bd05e97
SHA18949a0762d9b68247d52209653b95f649470deee
SHA256c2b08bb76ce8bbb8d85504b6725bd33e473a591af9bd358286c407b280d07440
SHA51284eeda4e49ceacb5ecc8017e95893d70d52176f973a0e0b1ea1e18098d65164f4a40aeceb17b17a091b288aee0284b60b4cca934cc513039e8736573210133d9
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Filesize
2.1MB
MD5c97f23b52087cfa97985f784ea83498f
SHA1d364618bec9cd6f8f5d4c24d3cc0f4c1a8e06b89
SHA256e658e8a5616245dbe655e194b59f1bb704aaeafbd0925d6eebbe70555a638cdd
SHA512ecfa83596f99afde9758d1142ff8b510a090cba6f42ba6fda8ca5e0520b658943ad85829a07bf17411e26e58432b74f05356f7eaeb3949a8834faa5de1a4f512
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Filesize
247KB
MD56b7fce17300b729ca1c919ae47db6c7d
SHA12e49381b6a922bfaafd040883b04e6a8ab6148b6
SHA256132ee3a204736259c89a6ae74d5c43e832409fa331e39686c6910936a9c7989f
SHA512e9ee8a63e72d6d11d6396a790c61b803df3f20d326cf5279afb4cf88e0838d393f8e0e9d06f27627ad8bdaeddbdb41f996eab6f1a2e2b91c26405e4c1c242f27
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Filesize
3KB
MD58592ba100a78835a6b94d5949e13dfc1
SHA163e901200ab9a57c7dd4c078d7f75dcd3b357020
SHA256fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c
SHA51287f98e6cb61b2a2a7d65710c4d33881d89715eb7a06e00d492259f35c3902498baabffc5886be0ec5a14312ad4c262e3fc40cd3a5cb91701af0fb229726b88c3
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Filesize
1KB
MD50472cacf6de49cd7a0a67f5f7c240692
SHA1b5d6b9bfac8545ab9b6991d51137deb7039b8614
SHA2565d071ff054756674f5d0fd0142ebbad9cc5cc9574529c8fc1e945c92e27f3c22
SHA512342b3c88d2c55834a57cf45570c23920386488763a0b53d3efd505e3b959d4b83f51ca21db4c1c5a38b3b22173e4d77e9d74503592a37c011216a633b0e217f5
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Filesize
1KB
MD5e4753c942c6887224bb19c9c3909e69e
SHA1e8fcd502ee1f12a383f1c011b5971016699d2bb1
SHA256d478283046f49d5a0160768562cdded390bfa35bc96713525258326988b4280a
SHA51295fa17cf724728641e64a6a91f46d676a66d69dde33fc28fedca11574a785c02249d96323e37ece922f165b7e161a7aea8ab84388325cddca6212abfa2354bc2
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Filesize
1KB
MD5a953721d088e3d07456fdfca2220f99c
SHA15b12aded20d8ab611f9e8fa25d458f9ef0f91a72
SHA2567dcf742206203a1a98cc04e546ae8482a43e6c1a449e34fb1f5a97b414af66e4
SHA51277564f706ffda97a399c1c06b12774385f2f4a64c74037069c6d2549dc5bf127b5f70bfaefb30b0e76a9aae360131b4203e2fd2de2a8b6ff89cc420b63a3fb18
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Filesize
1B
MD5c4ca4238a0b923820dcc509a6f75849b
SHA1356a192b7913b04c54574d18c28d46e6395428ab
SHA2566b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
SHA5124dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a