ff2693010b02d796fd906a3a6a8da9a556fb7d97d2f4546afa1c908df463c1f4

General

Target

GuyletsExternalRidJoinerGui/GuyletsExternalRidJoinerGui.exe
Size

155KB
MD5

e255e84648505e8228380976ad2d685d
SHA1

4b721e76cde9c269fe1e0ad4e86d0b7c6ea13786
SHA256

e402c2f9178dfd465e2004f7e0aed91418c67119a816cc56620be17eae3b53b7
SHA512

481e8aecbc2f364008874385feb125d4df9959078aae44775004e200cc17dcf72643220357a9e49ab300921f08df90cf5f0a0cf60ce14dd076a49b60246d91c5
SSDEEP

3072:TIzgaYv9HoBifPBPk0AH1a0yIdi3IwoOGbAQ8eljXn3:TEBqjXsmPYlX

Score

6^/10

persistence

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 IoCs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Processes:

msedge.exe

description ioc process

Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run msedge.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run	msedge.exe

Drops file in Program Files directory 2 IoCs

Processes:

setup.exe

description	ioc	process
File created	C:\Program Files (x86)\Microsoft\Edge\Application\SetupMetrics\e6a5c909-d547-47da-87ad-7666b9b5f608.tmp	setup.exe
File opened for modification	C:\Program Files (x86)\Microsoft\Edge\Application\SetupMetrics\20220905095252.pma	setup.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

msedge.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	msedge.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	msedge.exe

Modifies registry class 1 IoCs

Processes:

msedge.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ msedge.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

msedge.exemsedge.exeidentity_helper.exe

pid process

4428 msedge.exe
4428 msedge.exe
1392 msedge.exe
1392 msedge.exe
2836 identity_helper.exe
2836 identity_helper.exe
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 5 IoCs

Processes:

msedge.exe

pid process

1392 msedge.exe
1392 msedge.exe
1392 msedge.exe
1392 msedge.exe
1392 msedge.exe
Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

msedge.exe

pid process

1392 msedge.exe
1392 msedge.exe
1392 msedge.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	msedge.exe

pid	process
4428	msedge.exe
4428	msedge.exe
1392	msedge.exe
1392	msedge.exe
2836	identity_helper.exe
2836	identity_helper.exe

pid	process
1392	msedge.exe
1392	msedge.exe
1392	msedge.exe
1392	msedge.exe
1392	msedge.exe

pid	process
1392	msedge.exe
1392	msedge.exe
1392	msedge.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

GuyletsExternalRidJoinerGui.exemsedge.exe

description	pid	process	target process
PID 1016 wrote to memory of 1392	1016	GuyletsExternalRidJoinerGui.exe	msedge.exe
PID 1016 wrote to memory of 1392	1016	GuyletsExternalRidJoinerGui.exe	msedge.exe
PID 1392 wrote to memory of 4284	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4284	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 2916	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4428	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4428	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe
PID 1392 wrote to memory of 4576	1392	msedge.exe	msedge.exe

C:\Users\Admin\AppData\Local\Temp\GuyletsExternalRidJoinerGui\GuyletsExternalRidJoinerGui.exe
"C:\Users\Admin\AppData\Local\Temp\GuyletsExternalRidJoinerGui\GuyletsExternalRidJoinerGui.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1016

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument https://aka.ms/dotnet-core-applaunch?missing_runtime=true&arch=x64&rid=win10-x64&apphost_version=5.0.5&gui=true
2⤵
- Adds Run key to start application
- Enumerates system info in registry
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:1392

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0xf8,0xfc,0x100,0xd4,0x104,0x7ff99d0646f8,0x7ff99d064708,0x7ff99d064718
3⤵
PID:4284

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2148 /prefetch:2
3⤵
PID:2916

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2296 /prefetch:3
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:4428

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2900 /prefetch:8
3⤵
PID:4576

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3820 /prefetch:1
3⤵
PID:3376

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3836 /prefetch:1
3⤵
PID:2336

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=5272 /prefetch:8
3⤵
PID:2944

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5532 /prefetch:1
3⤵
PID:5104

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=5540 /prefetch:8
3⤵
PID:3796

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5896 /prefetch:1
3⤵
PID:1500

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --disable-gpu-compositing --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6028 /prefetch:1
3⤵
PID:3608

C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5612 /prefetch:8
3⤵
PID:1936

C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe" --configure-user-settings --verbose-logging --system-level --msedge --force-configure-user-settings
3⤵
- Drops file in Program Files directory
PID:2784

C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe" --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Windows\TEMP\MsEdgeCrashpad --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\Installer\setup.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0x224,0x228,0x22c,0x200,0x230,0x7ff6fd2f5460,0x7ff6fd2f5470,0x7ff6fd2f5480
4⤵
PID:1644

C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2092,16368472229381548126,1014137746357948262,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5612 /prefetch:8
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:2836

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:3704

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\??\pipe\LOCAL\crashpad_1392_LYCMZCEKVOZYLSVP

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
memory/1392-132-0x0000000000000000-mapping.dmp

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memory/1500-151-0x0000000000000000-mapping.dmp

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memory/1644-155-0x0000000000000000-mapping.dmp

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memory/2336-143-0x0000000000000000-mapping.dmp

Download
memory/2784-154-0x0000000000000000-mapping.dmp

Download
memory/2836-156-0x0000000000000000-mapping.dmp

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memory/2916-135-0x0000000000000000-mapping.dmp

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memory/2944-145-0x0000000000000000-mapping.dmp

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memory/3376-141-0x0000000000000000-mapping.dmp

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memory/3608-153-0x0000000000000000-mapping.dmp

Download
memory/3796-149-0x0000000000000000-mapping.dmp

Download
memory/4284-133-0x0000000000000000-mapping.dmp

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memory/4428-136-0x0000000000000000-mapping.dmp

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memory/4576-139-0x0000000000000000-mapping.dmp

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memory/5104-147-0x0000000000000000-mapping.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads