Analysis
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max time kernel
32s -
max time network
31s -
platform
windows10-1703_x64 -
resource
win10-20220812-en -
resource tags
arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system -
submitted
19-12-2022 15:57
Static task
static1
Behavioral task
behavioral1
Sample
Letter of Appreciation.pdf
Resource
win10-20220812-en
windows10-1703-x64
6 signatures
600 seconds
General
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Target
Letter of Appreciation.pdf
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Size
10KB
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MD5
320bf1284032d59212cdfa833b9034ad
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SHA1
c2cbc3a319fadba938cc8c2158cad91f8cedf14b
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SHA256
d2023262b98412180d7aa4169f8349ec47abbc133871006e3100e2344330ec8d
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SHA512
05685cb11f44f3210a9e77088ed71442e8e214c22940beb0ec46fdddc0c7480e2201cc0da8a76ec7af20461a2ae51046485bae50232275418c7e94b94e1fac56
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SSDEEP
192:yQpML0/LHWmjM9i1ni2U5XqFGTs7p1MZFhJ+DozMULN6N9yTANWVJdzSwl5FfRIK:yQpML0/LHWmjaiw5XqFG4l2fh6olLN6c
Score
1/10
Malware Config
Signatures
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 AcroRd32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz AcroRd32.exe -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-2482096546-1136599444-1359412500-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION AcroRd32.exe -
Suspicious behavior: EnumeratesProcesses 16 IoCs
pid Process 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 3764 AcroRd32.exe -
Suspicious use of SetWindowsHookEx 6 IoCs
pid Process 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe 3764 AcroRd32.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 3764 wrote to memory of 2984 3764 AcroRd32.exe 66 PID 3764 wrote to memory of 2984 3764 AcroRd32.exe 66 PID 3764 wrote to memory of 2984 3764 AcroRd32.exe 66 PID 3764 wrote to memory of 4268 3764 AcroRd32.exe 67 PID 3764 wrote to memory of 4268 3764 AcroRd32.exe 67 PID 3764 wrote to memory of 4268 3764 AcroRd32.exe 67 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 564 2984 RdrCEF.exe 69 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70 PID 2984 wrote to memory of 620 2984 RdrCEF.exe 70
Processes
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C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe"C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\Letter of Appreciation.pdf"1⤵
- Checks processor information in registry
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3764 -
C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe"C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --backgroundcolor=165140432⤵
- Suspicious use of WriteProcessMemory
PID:2984 -
C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe"C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=gpu-process --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --gpu-preferences=GAAAAAAAAAAAB4AAAQAAAAAAAAAAAGAA --use-gl=swiftshader-webgl --gpu-vendor-id=0x1234 --gpu-device-id=0x1111 --gpu-driver-vendor="Google Inc." --gpu-driver-version=3.3.0.2 --gpu-driver-date=2017/04/07 --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --service-request-channel-token=83CC87FD3863F25E6CD3B8E9D72EE66F --mojo-platform-channel-handle=1624 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:23⤵PID:564
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C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe"C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=renderer --disable-browser-side-navigation --disable-gpu-compositing --service-pipe-token=0D0A2CD5596FC8D33E9C3A24D4E434A5 --lang=en-US --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --enable-pinch --device-scale-factor=1 --num-raster-threads=1 --enable-gpu-async-worker-context --content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,3553;0,8,3553;0,9,3553;0,10,3553;0,11,3553;0,12,3553;0,13,3553;0,14,3553;0,15,3553;0,16,3553;0,17,3553;0,18,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,3553;1,10,3553;1,11,3553;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;1,17,3553;1,18,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,3553;2,10,3553;2,11,3553;2,12,3553;2,13,3553;2,14,3553;2,15,3553;2,16,3553;2,17,3553;2,18,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;3,17,3553;3,18,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,3553;4,5,3553;4,6,3553;4,7,3553;4,8,3553;4,9,3553;4,10,3553;4,11,3553;4,12,3553;4,13,3553;4,14,3553;4,15,3553;4,16,3553;4,17,3553;4,18,3553;5,0,3553;5,1,3553;5,2,3553;5,3,3553;5,4,3553;5,5,3553;5,6,3553;5,7,3553;5,8,3553;5,9,3553;5,10,3553;5,11,3553;5,12,3553;5,13,3553;5,14,3553;5,15,3553;5,16,3553;5,17,3553;5,18,3553;6,0,3553;6,1,3553;6,2,3553;6,3,3553;6,4,3553;6,5,3553;6,6,3553;6,7,3553;6,8,3553;6,9,3553;6,10,3553;6,11,3553;6,12,3553;6,13,3553;6,14,3553;6,15,3553;6,16,3553;6,17,3553;6,18,3553 --disable-accelerated-video-decode --service-request-channel-token=0D0A2CD5596FC8D33E9C3A24D4E434A5 --renderer-client-id=2 --mojo-platform-channel-handle=1636 --allow-no-sandbox-job /prefetch:13⤵PID:620
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C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe"C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=renderer --disable-browser-side-navigation --disable-gpu-compositing --service-pipe-token=0DD4C516B26E54F279DD73613A5CA494 --lang=en-US --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --enable-pinch --device-scale-factor=1 --num-raster-threads=1 --enable-gpu-async-worker-context --content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,3553;0,8,3553;0,9,3553;0,10,3553;0,11,3553;0,12,3553;0,13,3553;0,14,3553;0,15,3553;0,16,3553;0,17,3553;0,18,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,3553;1,10,3553;1,11,3553;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;1,17,3553;1,18,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,3553;2,10,3553;2,11,3553;2,12,3553;2,13,3553;2,14,3553;2,15,3553;2,16,3553;2,17,3553;2,18,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;3,17,3553;3,18,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,3553;4,5,3553;4,6,3553;4,7,3553;4,8,3553;4,9,3553;4,10,3553;4,11,3553;4,12,3553;4,13,3553;4,14,3553;4,15,3553;4,16,3553;4,17,3553;4,18,3553;5,0,3553;5,1,3553;5,2,3553;5,3,3553;5,4,3553;5,5,3553;5,6,3553;5,7,3553;5,8,3553;5,9,3553;5,10,3553;5,11,3553;5,12,3553;5,13,3553;5,14,3553;5,15,3553;5,16,3553;5,17,3553;5,18,3553;6,0,3553;6,1,3553;6,2,3553;6,3,3553;6,4,3553;6,5,3553;6,6,3553;6,7,3553;6,8,3553;6,9,3553;6,10,3553;6,11,3553;6,12,3553;6,13,3553;6,14,3553;6,15,3553;6,16,3553;6,17,3553;6,18,3553 --disable-accelerated-video-decode --service-request-channel-token=0DD4C516B26E54F279DD73613A5CA494 --renderer-client-id=4 --mojo-platform-channel-handle=1980 --allow-no-sandbox-job /prefetch:13⤵PID:748
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C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe"C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --type=gpu-process --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --gpu-preferences=GAAAAAAAAAAAB4AAAQAAAAAAAAAAAGAA --use-gl=swiftshader-webgl --gpu-vendor-id=0x1234 --gpu-device-id=0x1111 --gpu-driver-vendor="Google Inc." --gpu-driver-version=3.3.0.2 --gpu-driver-date=2017/04/07 --disable-pack-loading --lang=en-US --log-file="C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\debug.log" --log-severity=disable --product-version="ReaderServices/19.10.20064 Chrome/64.0.3282.119" --service-request-channel-token=5D81B44F263EB3EF0A343E36A620D758 --mojo-platform-channel-handle=2452 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:23⤵PID:3956
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C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe"C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroCEF\RdrCEF.exe" --backgroundcolor=165140432⤵PID:4268
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