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Analysis
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max time kernel
142s -
max time network
31s -
platform
windows7_x64 -
resource
win7v200430 -
submitted
16/07/2020, 07:18
Static task
static1
Behavioral task
behavioral1
Sample
Dekont.exe
Resource
win7v200430
Behavioral task
behavioral2
Sample
Dekont.exe
Resource
win10
General
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Target
Dekont.exe
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Size
694KB
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MD5
9e8bd6819de523a6012332c81f2b84e0
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SHA1
af4b5ba18445366f1afa7e4c67ea7a1c9382b48e
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SHA256
01da17c9c2c55ea880f5f2d1d1b845d2f534b8fe411bc2ad18e4dba6e24a292f
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SHA512
1688ff174fd080a820c58ab9d7a0e667f457d80c2a74c76ae0f37f92dfcff2e1a9b7c313e165ea441160d5a1ca01ec4ad031bdc552afef5e590fcb93240493b8
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.decoplanet.net - Port:
587 - Username:
[email protected] - Password:
ayla1939
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 7 IoCs
resource yara_rule behavioral1/files/0x00040000000131b9-5.dat family_agenttesla behavioral1/files/0x00040000000131b9-7.dat family_agenttesla behavioral1/files/0x00040000000131b9-8.dat family_agenttesla behavioral1/memory/1624-14-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/1624-15-0x0000000000446EBE-mapping.dmp family_agenttesla behavioral1/memory/1624-17-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/1624-18-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla -
Executes dropped EXE 2 IoCs
pid Process 656 application.exe 1624 InstallUtil.exe -
Loads dropped DLL 2 IoCs
pid Process 888 Dekont.exe 656 application.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-910373003-3952921535-3480519689-1000\Software\Microsoft\Windows\CurrentVersion\Run\application = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\application.exe" reg.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 656 set thread context of 1624 656 application.exe 30 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 888 Dekont.exe 888 Dekont.exe 888 Dekont.exe 656 application.exe 656 application.exe 656 application.exe 1624 InstallUtil.exe 1624 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 888 Dekont.exe Token: SeDebugPrivilege 656 application.exe Token: SeDebugPrivilege 1624 InstallUtil.exe -
Suspicious use of WriteProcessMemory 24 IoCs
description pid Process procid_target PID 888 wrote to memory of 1796 888 Dekont.exe 26 PID 888 wrote to memory of 1796 888 Dekont.exe 26 PID 888 wrote to memory of 1796 888 Dekont.exe 26 PID 888 wrote to memory of 1796 888 Dekont.exe 26 PID 1796 wrote to memory of 1724 1796 cmd.exe 28 PID 1796 wrote to memory of 1724 1796 cmd.exe 28 PID 1796 wrote to memory of 1724 1796 cmd.exe 28 PID 1796 wrote to memory of 1724 1796 cmd.exe 28 PID 888 wrote to memory of 656 888 Dekont.exe 29 PID 888 wrote to memory of 656 888 Dekont.exe 29 PID 888 wrote to memory of 656 888 Dekont.exe 29 PID 888 wrote to memory of 656 888 Dekont.exe 29 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30 PID 656 wrote to memory of 1624 656 application.exe 30
Processes
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C:\Users\Admin\AppData\Local\Temp\Dekont.exe"C:\Users\Admin\AppData\Local\Temp\Dekont.exe"1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:888 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v application /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\application.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:1796 -
C:\Windows\SysWOW64\reg.exeREG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v application /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\application.exe"3⤵
- Adds Run key to start application
PID:1724
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C:\Users\Admin\AppData\Roaming\application.exe"C:\Users\Admin\AppData\Roaming\application.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:656 -
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1624
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