Analysis
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max time kernel
1606s -
max time network
1611s -
platform
windows7_x64 -
resource
win7-20220901-es -
resource tags
arch:x64arch:x86image:win7-20220901-eslocale:es-esos:windows7-x64systemwindows -
submitted
07/01/2023, 22:51
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://anonfile.com/v3n3ub1fn8/Instacash_pdf
Resource
win7-20220901-es
windows7-x64
12 signatures
1800 seconds
Behavioral task
behavioral2
Sample
https://anonfile.com/v3n3ub1fn8/Instacash_pdf
Resource
win10v2004-20221111-es
windows10-2004-x64
7 signatures
1800 seconds
Malware Config
Signatures
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Downloads MZ/PE file
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Drops file in Windows directory 1 IoCs
description ioc Process File opened for modification \??\c:\windows\installer\{ac76ba86-7ad7-1033-7b44-a90000000001}\pdffile_8.ico firefox.exe -
HTTP links in PDF interactive object 1 IoCs
Detects HTTP links in interactive objects within PDF files.
resource yara_rule behavioral1/files/0x0008000000014ab1-55.dat pdf_with_link_action -
Checks processor information in registry 2 TTPs 4 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 firefox.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Signature firefox.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~Mhz firefox.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier firefox.exe -
Modifies registry class 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_Classes\Local Settings firefox.exe Key created \REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache firefox.exe -
NTFS ADS 1 IoCs
description ioc Process File created C:\Users\Admin\Downloads\Instacash.pdf:Zone.Identifier firefox.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2404 AcroRd32.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 992 firefox.exe Token: SeDebugPrivilege 992 firefox.exe Token: SeDebugPrivilege 992 firefox.exe -
Suspicious use of FindShellTrayWindow 4 IoCs
pid Process 992 firefox.exe 992 firefox.exe 992 firefox.exe 992 firefox.exe -
Suspicious use of SendNotifyMessage 3 IoCs
pid Process 992 firefox.exe 992 firefox.exe 992 firefox.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 992 firefox.exe 992 firefox.exe 992 firefox.exe 2404 AcroRd32.exe 2404 AcroRd32.exe 2404 AcroRd32.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 628 wrote to memory of 992 628 firefox.exe 27 PID 628 wrote to memory of 992 628 firefox.exe 27 PID 628 wrote to memory of 992 628 firefox.exe 27 PID 628 wrote to memory of 992 628 firefox.exe 27 PID 628 wrote to memory of 992 628 firefox.exe 27 PID 628 wrote to memory of 992 628 firefox.exe 27 PID 628 wrote to memory of 992 628 firefox.exe 27 PID 628 wrote to memory of 992 628 firefox.exe 27 PID 628 wrote to memory of 992 628 firefox.exe 27 PID 628 wrote to memory of 992 628 firefox.exe 27 PID 992 wrote to memory of 1824 992 firefox.exe 29 PID 992 wrote to memory of 1824 992 firefox.exe 29 PID 992 wrote to memory of 1824 992 firefox.exe 29 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 852 992 firefox.exe 30 PID 992 wrote to memory of 1588 992 firefox.exe 31 PID 992 wrote to memory of 1588 992 firefox.exe 31 PID 992 wrote to memory of 1588 992 firefox.exe 31 PID 992 wrote to memory of 1588 992 firefox.exe 31 PID 992 wrote to memory of 1588 992 firefox.exe 31 PID 992 wrote to memory of 1588 992 firefox.exe 31 PID 992 wrote to memory of 1588 992 firefox.exe 31
Processes
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" https://anonfile.com/v3n3ub1fn8/Instacash_pdf1⤵
- Suspicious use of WriteProcessMemory
PID:628 -
C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" https://anonfile.com/v3n3ub1fn8/Instacash_pdf2⤵
- Drops file in Windows directory
- Checks processor information in registry
- Modifies registry class
- NTFS ADS
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:992 -
C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="992.0.516238498\1937503584" -parentBuildID 20200403170909 -prefsHandle 1184 -prefMapHandle 1176 -prefsLen 1 -prefMapSize 220106 -appdir "C:\Program Files\Mozilla Firefox\browser" - 992 "\\.\pipe\gecko-crash-server-pipe.992" 1248 gpu3⤵PID:1824
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="992.3.216610059\493280697" -childID 1 -isForBrowser -prefsHandle 1768 -prefMapHandle 1764 -prefsLen 156 -prefMapSize 220106 -parentBuildID 20200403170909 -appdir "C:\Program Files\Mozilla Firefox\browser" - 992 "\\.\pipe\gecko-crash-server-pipe.992" 1704 tab3⤵PID:852
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="992.13.1836512697\1681568106" -childID 2 -isForBrowser -prefsHandle 2648 -prefMapHandle 2644 -prefsLen 6938 -prefMapSize 220106 -parentBuildID 20200403170909 -appdir "C:\Program Files\Mozilla Firefox\browser" - 992 "\\.\pipe\gecko-crash-server-pipe.992" 2660 tab3⤵PID:1588
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C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\Downloads\Instacash.pdf"1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:2404
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
272KB
MD5f3a51e1369eb46dcc23590616e3a8deb
SHA18207021c5ed9ff7c4f8b41961d045cc481cd8e76
SHA256aa3c6ab78143b6b92f08d573631a38010cf3f108fc7904fdd9ad88c087bb594f
SHA5122a41031260c9bf0a71214858ffddb7f2196d5a5a823b3af6c6bdd0c851769627f91ffea24b497e5c7cdaa40ab7403e6d4b78a6232383f5a18f8a1c380adb3821