9348cd498a4c4e5f84fb46e4140954e48d48b75110a20dc716b320b2e488fab4

Analysis

max time kernel
50s
max time network
22s
platform
windows10-1703_x64
resource
win10-20240221-en
resource tags

arch:x64arch:x86image:win10-20240221-enlocale:en-usos:windows10-1703-x64system
submitted
28-02-2024 10:49

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General

Target

055844127-01 Denial Letter.pdf
Size

412KB
MD5

13c66def10e4d7b056948410d4929711
SHA1

cd46a366aec49f88bba52e22736a52bd73dd5941
SHA256

9348cd498a4c4e5f84fb46e4140954e48d48b75110a20dc716b320b2e488fab4
SHA512

d226d3facd480f76ca9e769f3830b846b7e3fdc3b47a07e1b506f601691ce7701c8cb421b04913e4bd86ff0915c3aaa864810893d4b571118f771a0492140a00
SSDEEP

12288:Q4LoNxf1D+cDSHyGp6p6MKHr6Lyr40uyhSy8FWS:rolD+VHyGp6p6MErfr+BT

Score

1^/10

Malware Config

Signatures

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

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

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3360119756-166634443-3920521668-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	AcroRd32.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1920	AcroRd32.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe
1920	AcroRd32.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 3048	1920	AcroRd32.exe	73
PID 1920 wrote to memory of 3048	1920	AcroRd32.exe	73
PID 1920 wrote to memory of 3048	1920	AcroRd32.exe	73
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 1500	3048	RdrCEF.exe	74
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75
PID 3048 wrote to memory of 5044	3048	RdrCEF.exe	75

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\055844127-01 Denial Letter.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:1920
- 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=16514043
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3048
- - 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=BD9FF7296738F4EDC05E3BCFA3CC033A --mojo-platform-channel-handle=1628 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
    3⤵
    PID:1500
- - 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=5E4997A4C01A4214EA60F8E4BCA7999C --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=4 --enable-main-frame-before-activation --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=5E4997A4C01A4214EA60F8E4BCA7999C --renderer-client-id=2 --mojo-platform-channel-handle=1640 --allow-no-sandbox-job /prefetch:1
    3⤵
    PID:5044
- - 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=7B47973F938A4965541D6989B409AC2E --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=4 --enable-main-frame-before-activation --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=7B47973F938A4965541D6989B409AC2E --renderer-client-id=4 --mojo-platform-channel-handle=2208 --allow-no-sandbox-job /prefetch:1
    3⤵
    PID:4200
- - 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=BB6E4364FA64BDDF2CF5DF5AF2AF1DFB --mojo-platform-channel-handle=2464 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
    3⤵
    PID:4636
- - 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=3B2A7EA2491856907E37D8071830E523 --mojo-platform-channel-handle=2584 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
    3⤵
    PID:1332
- - 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=2502B32E30567B2DEB6F0593DD5FB731 --mojo-platform-channel-handle=2468 --allow-no-sandbox-job --ignored=" --type=renderer " /prefetch:2
    3⤵
    PID:60

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Adobe\Acrobat\DC\ReaderMessages

Filesize
64KB

MD5
305ffd4a93e5568fc49d9afdfe7a77ae

SHA1
449ff8b070a38d6536fdca54d856574ac25e8e43

SHA256
7dfd3e84ec8dbd97146d14bc2f5be2b7c72353d71cf74336c12437595a5a0ca1

SHA512
1b65567a44cf9e202497a2ee7887fa30cc341456c229eadb41c1d77b11f412d4f9f40e06034798d4bc9288e1de501cf5fd65d9ef560044591f38f1e37245a853

Download Submit
C:\Users\Admin\AppData\LocalLow\Adobe\Acrobat\DC\ReaderMessages

Filesize
36KB

MD5
b30d3becc8731792523d599d949e63f5

SHA1
19350257e42d7aee17fb3bf139a9d3adb330fad4

SHA256
b1b77e96279ead2b460de3de70e2ea4f5ad1b853598a4e27a5caf3f1a32cc4f3

SHA512
523f54895fb07f62b9a5f72c8b62e83d4d9506bda57b183818615f6eb7286e3b9c5a50409bc5c5164867c3ccdeae88aa395ecca6bc7e36d991552f857510792e

Download Submit
C:\Users\Admin\AppData\LocalLow\Adobe\Acrobat\DC\ReaderMessages

Filesize
56KB

MD5
752a1f26b18748311b691c7d8fc20633

SHA1
c1f8e83eebc1cc1e9b88c773338eb09ff82ab862

SHA256
111dac2948e4cecb10b0d2e10d8afaa663d78d643826b592d6414a1fd77cc131

SHA512
a2f5f262faf2c3e9756da94b2c47787ce3a9391b5bd53581578aa9a764449e114836704d6dec4aadc097fed4c818831baa11affa1eb25be2bfad9349bb090fe5

Download Submit
memory/1920-138-0x000000000BD00000-0x000000000BE4D000-memory.dmp

Filesize
1.3MB

Download
memory/1920-146-0x000000000C1D0000-0x000000000C47B000-memory.dmp

Filesize
2.7MB

Download