Analysis
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max time kernel
136s -
max time network
102s -
platform
windows7_x64 -
resource
win7 -
submitted
07/07/2020, 08:41
Static task
static1
Behavioral task
behavioral1
Sample
HALKBANK.exe
Resource
win7
Behavioral task
behavioral2
Sample
HALKBANK.exe
Resource
win10
General
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Target
HALKBANK.exe
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Size
1.9MB
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MD5
50c28ec3b4d36ef6d94c9ee44669d5c6
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SHA1
e1fa59975732f319ee3543721946c9bdbddcdd7d
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SHA256
8424b5a86327251f934d4e4526de3d48b942c0953a866f84de2d7bb19a5fbc04
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SHA512
f6bd95acce6103f8111f3b510c64de731733b0e5ccde6313ba55193667d22a0cc5f076672b25ea30fc58e50e164ab8149541dd0a79ece6e26c54d27272b6cdc1
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.bunsadokum.com - Port:
587 - Username:
[email protected] - Password:
posta38Bunsa
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 13 IoCs
resource yara_rule behavioral1/memory/1576-46-0x0000000000000000-mapping.dmp family_agenttesla behavioral1/memory/1576-47-0x0000000000000000-mapping.dmp family_agenttesla behavioral1/memory/1576-48-0x0000000000000000-mapping.dmp family_agenttesla behavioral1/memory/1576-50-0x0000000000000000-mapping.dmp family_agenttesla behavioral1/memory/1576-49-0x0000000000000000-mapping.dmp family_agenttesla behavioral1/memory/1576-52-0x0000000000000000-mapping.dmp family_agenttesla behavioral1/memory/1576-51-0x0000000000000000-mapping.dmp family_agenttesla behavioral1/memory/1576-53-0x0000000000000000-mapping.dmp family_agenttesla behavioral1/memory/1576-54-0x0000000000000000-mapping.dmp family_agenttesla behavioral1/memory/1888-56-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/1888-57-0x000000000044749E-mapping.dmp family_agenttesla behavioral1/memory/1888-59-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/1888-60-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla -
Executes dropped EXE 5 IoCs
pid Process 1608 RegAsm.exe 1576 firefoxx.exe 1636 RegAsm.exe 1900 firefoxx.exe 1888 RegAsm.exe -
Loads dropped DLL 12 IoCs
pid Process 1424 HALKBANK.exe 1608 RegAsm.exe 1608 RegAsm.exe 1576 firefoxx.exe 1636 RegAsm.exe 2024 WerFault.exe 2024 WerFault.exe 2024 WerFault.exe 2024 WerFault.exe 1636 RegAsm.exe 2024 WerFault.exe 1888 RegAsm.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 4 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefoxx = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\firefoxx.exe" reg.exe Key created \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\firefoxx = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Start Menu\\Programs\\firefoxx.exe" reg.exe -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 1424 set thread context of 1608 1424 HALKBANK.exe 24 PID 1576 set thread context of 1636 1576 firefoxx.exe 32 PID 1636 set thread context of 1888 1636 RegAsm.exe 35 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Program crash 1 IoCs
pid pid_target Process procid_target 2024 1576 WerFault.exe 31 -
Suspicious behavior: EnumeratesProcesses 23 IoCs
pid Process 1424 HALKBANK.exe 1424 HALKBANK.exe 1424 HALKBANK.exe 1608 RegAsm.exe 1424 HALKBANK.exe 1424 HALKBANK.exe 1608 RegAsm.exe 1608 RegAsm.exe 1576 firefoxx.exe 1576 firefoxx.exe 1576 firefoxx.exe 1636 RegAsm.exe 1900 firefoxx.exe 1576 firefoxx.exe 1576 firefoxx.exe 1636 RegAsm.exe 1636 RegAsm.exe 2024 WerFault.exe 2024 WerFault.exe 2024 WerFault.exe 2024 WerFault.exe 1888 RegAsm.exe 1888 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 7 IoCs
description pid Process Token: SeDebugPrivilege 1424 HALKBANK.exe Token: SeDebugPrivilege 1608 RegAsm.exe Token: SeDebugPrivilege 1576 firefoxx.exe Token: SeDebugPrivilege 1636 RegAsm.exe Token: SeDebugPrivilege 1900 firefoxx.exe Token: SeDebugPrivilege 2024 WerFault.exe Token: SeDebugPrivilege 1888 RegAsm.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1608 1424 HALKBANK.exe 24 PID 1424 wrote to memory of 1076 1424 HALKBANK.exe 25 PID 1424 wrote to memory of 1076 1424 HALKBANK.exe 25 PID 1424 wrote to memory of 1076 1424 HALKBANK.exe 25 PID 1424 wrote to memory of 1076 1424 HALKBANK.exe 25 PID 1076 wrote to memory of 1688 1076 cmd.exe 27 PID 1076 wrote to memory of 1688 1076 cmd.exe 27 PID 1076 wrote to memory of 1688 1076 cmd.exe 27 PID 1076 wrote to memory of 1688 1076 cmd.exe 27 PID 1608 wrote to memory of 1808 1608 RegAsm.exe 28 PID 1608 wrote to memory of 1808 1608 RegAsm.exe 28 PID 1608 wrote to memory of 1808 1608 RegAsm.exe 28 PID 1608 wrote to memory of 1808 1608 RegAsm.exe 28 PID 1808 wrote to memory of 1356 1808 cmd.exe 30 PID 1808 wrote to memory of 1356 1808 cmd.exe 30 PID 1808 wrote to memory of 1356 1808 cmd.exe 30 PID 1808 wrote to memory of 1356 1808 cmd.exe 30 PID 1608 wrote to memory of 1576 1608 RegAsm.exe 31 PID 1608 wrote to memory of 1576 1608 RegAsm.exe 31 PID 1608 wrote to memory of 1576 1608 RegAsm.exe 31 PID 1608 wrote to memory of 1576 1608 RegAsm.exe 31 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1576 wrote to memory of 1636 1576 firefoxx.exe 32 PID 1424 wrote to memory of 1900 1424 HALKBANK.exe 33 PID 1424 wrote to memory of 1900 1424 HALKBANK.exe 33 PID 1424 wrote to memory of 1900 1424 HALKBANK.exe 33 PID 1424 wrote to memory of 1900 1424 HALKBANK.exe 33 PID 1576 wrote to memory of 2024 1576 firefoxx.exe 34 PID 1576 wrote to memory of 2024 1576 firefoxx.exe 34 PID 1576 wrote to memory of 2024 1576 firefoxx.exe 34 PID 1576 wrote to memory of 2024 1576 firefoxx.exe 34 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35 PID 1636 wrote to memory of 1888 1636 RegAsm.exe 35
Processes
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C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe"C:\Users\Admin\AppData\Local\Temp\HALKBANK.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1424 -
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1608 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v firefoxx /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"3⤵
- Suspicious use of WriteProcessMemory
PID:1808 -
C:\Windows\SysWOW64\reg.exeREG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v firefoxx /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"4⤵
- Adds Run key to start application
PID:1356
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1576 -
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"4⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1636 -
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"5⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1888
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1576 -s 7324⤵
- Loads dropped DLL
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2024
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v firefoxx /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:1076 -
C:\Windows\SysWOW64\reg.exeREG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v firefoxx /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"3⤵
- Adds Run key to start application
PID:1688
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\firefoxx.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1900
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