Analysis
- max time kernel
146s - max time network
142s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 19:30
Static task
static1
Behavioral task
behavioral1
Sample
invoices0000456_pdf.exe
Resource
win7v20201028
windows7_x64
0 signatures
0 seconds
General
- Target invoices0000456_pdf.exe
- Size 1.5MB
- Sample201109-75avv34l8a
- SHA256 a721e0a8a2daa0d5dee6ff75b846c1dbeb40f697221efb00866e450bea2b391c
- MD5 a891012b787e51aeccb9783a34bdd04c
- SHA1 c99007f4162fb4edf0bd3b45b9e23cc3bbc0e418
- SHA512 3c11f7977dcf47aaa8e880201be68c00bf2d3cdd5982256e089063a55c6fb47bf0b1e7ce2b5050128751ab82e6a51840db3809c7ee30a70050b9c60dee30bf09
- MD5 SHA1 SHA512
Malware Config
Extracted
Family
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formbook
C2
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http://www.ulxery.com/b89/
Decoy
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davidmoultonmd.com
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eva.gmbh
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djhayseed.info
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lytx8.com
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buyielectronics.com
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mcloibc.com
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westphaliami.net
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21centuryworklife.com
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siapngebant.com
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theharmonicrelease.com
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jingjing6668.com
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babelnovels.com
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robert-holden-lawyer.info
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miitnlabs.com
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akademiodev.com
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mbi-clinic.center
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bigideasmallworld.com
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criosaunas.today
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azusq.com
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weixinzhenghun.com
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yx1555.com
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wicketkick.com
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postschoolafrica.com
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hotelfulhadhoo.com
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gilleshapawa.com
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ntgva.com
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banditasamsterdam.com
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dailyenough.com
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1r1sixabout.men
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dsproutslearning.com
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vavlu.info
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pusathondabekasi.com
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swty44111.com
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mkpcva.com
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xoegl.info
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yozu.ltd
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xn--i7qu7w.net
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stormerzmusic.com
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xhk8.com
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5568dd.com
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hometownvideoproductions.com
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assistenz.online
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athomlife.com
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haocaiyueli.com
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learnenglishwithaustralians.com
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thecoagency.com
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centuryflight.net
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gznzzdh.com
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sprinterslogservices.com
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cakepbanget.com
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dheba.com
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3d9nine.loan
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innercoregolf.com
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domotshop.com
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dxagxyey.com
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aliqkl.com
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urliveparty.com
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xn--rhqq3yvxwj9u.com
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mirandalaree.com
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freshgrace.today
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la-neurotica.com
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xn--djr002ipya.net
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softwarenagar.com
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cancanfun.com
Signatures
- Formbook Payload 3 IoCs
resource yara_rule behavioral2/memory/3932-0-0x0000000000400000-0x000000000042A000-memory.dmp formbook behavioral2/memory/3932-1-0x000000000041B640-mapping.dmp formbook behavioral2/memory/3464-3-0x0000000000000000-mapping.dmp formbook - Adds policy Run key to start application 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run mstsc.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\DBK4ANZHQZC = "C:\\Program Files (x86)\\Pvvvhv\\9rj8zjrpozsd1n0.exe" mstsc.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 984 set thread context of 3932 984 invoices0000456_pdf.exe 78 PID 3932 set thread context of 3128 3932 dllhost.exe 58 PID 3464 set thread context of 3128 3464 mstsc.exe 58 - Drops file in Program Files directory 1 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Pvvvhv\9rj8zjrpozsd1n0.exe mstsc.exe -
description ioc Process Key created \Registry\User\S-1-5-21-3341490333-719741536-2920803124-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2 mstsc.exe - Suspicious behavior: EnumeratesProcesses 58 IoCs
pid Process 3932 dllhost.exe 3932 dllhost.exe 3932 dllhost.exe 3932 dllhost.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe 3464 mstsc.exe - Suspicious behavior: MapViewOfSection 6 IoCs
pid Process 984 invoices0000456_pdf.exe 3932 dllhost.exe 3932 dllhost.exe 3932 dllhost.exe 3464 mstsc.exe 3464 mstsc.exe - Suspicious use of AdjustPrivilegeToken 6 IoCs
description pid Process Token: SeDebugPrivilege 3932 dllhost.exe Token: SeDebugPrivilege 3464 mstsc.exe Token: SeShutdownPrivilege 3128 Explorer.EXE Token: SeCreatePagefilePrivilege 3128 Explorer.EXE Token: SeShutdownPrivilege 3128 Explorer.EXE Token: SeCreatePagefilePrivilege 3128 Explorer.EXE - Suspicious use of FindShellTrayWindow 3 IoCs
pid Process 984 invoices0000456_pdf.exe 984 invoices0000456_pdf.exe 984 invoices0000456_pdf.exe - Suspicious use of SendNotifyMessage 3 IoCs
pid Process 984 invoices0000456_pdf.exe 984 invoices0000456_pdf.exe 984 invoices0000456_pdf.exe - Suspicious use of WriteProcessMemory 10 IoCs
description pid Process procid_target PID 984 wrote to memory of 3932 984 invoices0000456_pdf.exe 78 PID 984 wrote to memory of 3932 984 invoices0000456_pdf.exe 78 PID 984 wrote to memory of 3932 984 invoices0000456_pdf.exe 78 PID 984 wrote to memory of 3932 984 invoices0000456_pdf.exe 78 PID 3128 wrote to memory of 3464 3128 Explorer.EXE 79 PID 3128 wrote to memory of 3464 3128 Explorer.EXE 79 PID 3128 wrote to memory of 3464 3128 Explorer.EXE 79 PID 3464 wrote to memory of 2896 3464 mstsc.exe 80 PID 3464 wrote to memory of 2896 3464 mstsc.exe 80 PID 3464 wrote to memory of 2896 3464 mstsc.exe 80
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3128 -
C:\Users\Admin\AppData\Local\Temp\invoices0000456_pdf.exe"C:\Users\Admin\AppData\Local\Temp\invoices0000456_pdf.exe"2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:984 -
C:\Windows\SysWOW64\dllhost.exe"C:\Windows\SysWOW64\dllhost.exe"3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3932
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C:\Windows\SysWOW64\mstsc.exe"C:\Windows\SysWOW64\mstsc.exe"2⤵
- Adds policy Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3464 -
C:\Windows\SysWOW64\cmd.exe/c del "C:\Windows\SysWOW64\dllhost.exe"3⤵PID:2896
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