Analysis
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max time kernel
98s -
max time network
53s -
platform
windows7_x64 -
resource
win7 -
submitted
12-07-2020 08:12
Static task
static1
Behavioral task
behavioral1
Sample
Original invoice.exe
Resource
win7
Behavioral task
behavioral2
Sample
Original invoice.exe
Resource
win10v200430
General
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Target
Original invoice.exe
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Size
799KB
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MD5
903746d6c18aef7b3acbf91fb0b1ba11
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SHA1
7712236e9d81cc5654023d7a21b0a518ea2b53d9
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SHA256
1debc399539d6dddfa7522dbf42b2ade7d0e56179588fae9f144301a84629e50
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SHA512
794e32b00aeda08552e8c05a94ded42b135f605d86dfe0d9d8f4cdbc0630226d1f957913d555f50efc638499aa75c8cad924cf1158bb96f9232d29fe0b4eb18a
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.amberresidenceng.com - Port:
587 - Username:
reservations@amberresidenceng.com - Password:
Amber_2017
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 4 IoCs
Processes:
resource yara_rule behavioral1/memory/1956-4-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/1956-5-0x0000000000446F0E-mapping.dmp family_agenttesla behavioral1/memory/1956-6-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/1956-7-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla -
Drops file in Drivers directory 1 IoCs
Processes:
RegSvcs.exedescription ioc process File opened for modification C:\Windows\system32\drivers\etc\hosts RegSvcs.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
RegSvcs.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\srZFYS = "C:\\Users\\Admin\\AppData\\Roaming\\srZFYS\\srZFYS.exe" RegSvcs.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Original invoice.exedescription pid process target process PID 1496 set thread context of 1956 1496 Original invoice.exe RegSvcs.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Modifies registry key 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
RegSvcs.exepid process 1956 RegSvcs.exe 1956 RegSvcs.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Original invoice.exeRegSvcs.exedescription pid process Token: SeDebugPrivilege 1496 Original invoice.exe Token: SeDebugPrivilege 1956 RegSvcs.exe -
Suspicious use of WriteProcessMemory 20 IoCs
Processes:
Original invoice.exeRegSvcs.exedescription pid process target process PID 1496 wrote to memory of 1900 1496 Original invoice.exe schtasks.exe PID 1496 wrote to memory of 1900 1496 Original invoice.exe schtasks.exe PID 1496 wrote to memory of 1900 1496 Original invoice.exe schtasks.exe PID 1496 wrote to memory of 1900 1496 Original invoice.exe schtasks.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1496 wrote to memory of 1956 1496 Original invoice.exe RegSvcs.exe PID 1956 wrote to memory of 852 1956 RegSvcs.exe REG.exe PID 1956 wrote to memory of 852 1956 RegSvcs.exe REG.exe PID 1956 wrote to memory of 852 1956 RegSvcs.exe REG.exe PID 1956 wrote to memory of 852 1956 RegSvcs.exe REG.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Original invoice.exe"C:\Users\Admin\AppData\Local\Temp\Original invoice.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\hzpICGBx" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD4FA.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
- Drops file in Drivers directory
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\REG.exeREG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System / v DisableTaskMgr / t REG_DWORD / d 1 / f3⤵
- Modifies registry key
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\tmpD4FA.tmpMD5
737ee5aea0ac473e1c705fd00aadaae1
SHA134699d5bc905ddd85183ad3080844911f82784dd
SHA25610550d4d2f5b7cc39db46346cb5dcbca2200311713371e1cfc3a8c3c4e7f7016
SHA51265737db896ffd631a6d9d5c963de5e8a64ff45848b5d4a5f45ba1dd683f43887b117db7bde7c161779eaaa351706ae019ed7d9579d1dd8d348dc87c4a94e64f0
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memory/852-8-0x0000000000000000-mapping.dmp
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memory/1496-1-0x0000000000000000-0x0000000000000000-disk.dmp
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memory/1900-2-0x0000000000000000-mapping.dmp
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memory/1956-4-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/1956-5-0x0000000000446F0E-mapping.dmp
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memory/1956-6-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/1956-7-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB