c0424d0ae06ca1e6e0249b40d33ac40d74075856d543ec0924884664fba52b79

Analysis

max time kernel
649s
max time network
886s
platform
windows10-1703_x64
resource
win10-20240221-en
resource tags

arch:x64arch:x86image:win10-20240221-enlocale:en-usos:windows10-1703-x64system
submitted
15-03-2024 02:50

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General

Target

Windows10Upgrade9252.exe
Size

3.2MB
MD5

c0b25def4312fbddbcc4f01c6c0f5ba6
SHA1

8d16a183d61233e7d6b6af7b3cafc6645ac2acb1
SHA256

c0424d0ae06ca1e6e0249b40d33ac40d74075856d543ec0924884664fba52b79
SHA512

8c67619747bb108dae5661688ec8fa4c62bc6ac38ee6ff14a4691aab04d7ddd870fee4262cb30624a6bd85ac1f7595af05311496b0336f979e7e5f797791bc0e
SSDEEP

98304:GgjXlctych4cCzJ8k2omX8sUf0ht5f/LyXtcH/:JjKtych9CzJqXM32jyX

Score

7^/10

discovery

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3652	Windows10UpgraderApp.exe

Loads dropped DLL 1 IoCs

pid	Process
3652	Windows10UpgraderApp.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 26 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\WindowsInstallationAssistant\GetCurrentOOBE.dll	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\pass.png	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\bullet.png	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\default_sunvalley.htm	Windows10Upgrade9252.exe
File opened for modification	C:\Program Files (x86)\WindowsInstallationAssistant\Configuration.ini	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\default.htm	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\eula.css	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\loading.gif	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\logo.png	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\marketing.png	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\Microsoft.WinJS\js\ui.js	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\Windows10UpgraderApp.exe	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\appraiserxp.dll	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\downloader.dll	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\GetCurrentDeploy.dll	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\WinDlp.dll	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\block.png	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\Microsoft.WinJS\css\ui-dark.css	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\Microsoft.WinJS\js\base.js	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\Microsoft.WinJS\css\oobe-desktopRS2.css	Windows10Upgrade9252.exe
File opened for modification	C:\Program Files (x86)\WindowsInstallationAssistant\appraiserxp.dll	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\GetCurrentRollback.EXE	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\default.css	Windows10Upgrade9252.exe
File opened for modification	C:\Program Files (x86)\WindowsInstallationAssistant\Configuration.ini	Windows10UpgraderApp.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\ESDHelper.dll	Windows10Upgrade9252.exe
File created	C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\Microsoft.WinJS\css\oobe-desktop.css	Windows10Upgrade9252.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4112	3652	WerFault.exe	73

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-885525822-3215264538-2232956653-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	Windows10UpgraderApp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-885525822-3215264538-2232956653-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	Windows10UpgraderApp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeBackupPrivilege	536	Windows10Upgrade9252.exe
Token: SeRestorePrivilege	536	Windows10Upgrade9252.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
3652	Windows10UpgraderApp.exe
3652	Windows10UpgraderApp.exe
3652	Windows10UpgraderApp.exe
3652	Windows10UpgraderApp.exe
3652	Windows10UpgraderApp.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 536 wrote to memory of 3652	536	Windows10Upgrade9252.exe	73
PID 536 wrote to memory of 3652	536	Windows10Upgrade9252.exe	73
PID 536 wrote to memory of 3652	536	Windows10Upgrade9252.exe	73

C:\Users\Admin\AppData\Local\Temp\Windows10Upgrade9252.exe
"C:\Users\Admin\AppData\Local\Temp\Windows10Upgrade9252.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:536
- C:\Program Files (x86)\WindowsInstallationAssistant\Windows10UpgraderApp.exe
  "C:\Program Files (x86)\WindowsInstallationAssistant\Windows10UpgraderApp.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:3652
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3652 -s 1812
    3⤵
    - Program crash
    PID:4112

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

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Downloads

C:\Program Files (x86)\WindowsInstallationAssistant\Configuration.ini

Filesize
27B

MD5
ca22263c7a6f965df18f5c601f5db7ce

SHA1
e4b1a401ed497523a583ae8613646b03778a33a6

SHA256
299fa3043627954c524b6171c26fcc3513790310aa2561e6f012eff15254381c

SHA512
3cd39b438f7cb34b38f32240b1ba6a5010f49e12123db770460cf74217bc6946e2032355376c203b68863ee85596d21aa7b2d77c94da48a54def111d147311f8

Download Submit
C:\Program Files (x86)\WindowsInstallationAssistant\Windows10UpgraderApp.exe

Filesize
3.5MB

MD5
ab38a78503d8ad3ce7d69f937d71a99c

SHA1
00b6a6f09dd45e356ef9e2cacd554c728313fa99

SHA256
f635cd1996967c2297e3f20c4838d2f45d1535cfea38971909683e26158fb782

SHA512
fe8e4c6973cb26b863ef97d95a7ae8b1b2dbce14bf3b317d085b38347be27db1adc46f5503c110df43e032911e5b070f3e9139857573fffdafff684f27ef1b8f

Download Submit
C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\EULA.css

Filesize
82B

MD5
b81d1e97c529ac3d7f5a699afce27080

SHA1
0a981264db289afd71695b4d6849672187e8120f

SHA256
35c6e30c7954f7e4b806c883576218621e2620166c8940701b33157bdd0ba225

SHA512
e5a8c95d0e9f7464f7bd908cf2f76c89100e69d9bc2e9354c0519bf7da15c5665b3ed97cd676d960d48c024993de0e9eb6683352d902eb86b8af68692334e607

Download Submit
C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\default.css

Filesize
5KB

MD5
7f5fcac447cc2150ac90020f8dc8c98b

SHA1
5710398d65fba59bd91d603fc340bf2a101df40a

SHA256
453d8ca4f52fb8fd40d5b4596596911b9fb0794bb89fbf9b60dc27af3eaa2850

SHA512
b9fb315fdcf93d028423f49438b1eff40216b377d8c3bc866a20914c17e00bef58a18228bebb8b33c8a64fcaaa34bee84064bb24a525b4c9ac2f26e384edb1ff

Download Submit
C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\default.htm

Filesize
60KB

MD5
b2a06af2867a2bb3d4b198a22f7936b3

SHA1
98a28e15abdd2d6989d667cc578bf6ab954c29f5

SHA256
40f468006ab37ef4fcc54c5ff25005644f15d696f1269f67b450c9e3ce5e8d23

SHA512
eefc295a7cd517c93bbeadee51ab778f371be8b21a92b0c06339da2e624abd19c34907e0a8965e6bfe81863752c56cc509fcf015a3ee986d208a5fc7cac8bfc5

Download Submit
C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\loading.gif

Filesize
16KB

MD5
1a276cb116bdece96adf8e32c4af4fee

SHA1
6bc30738fcd0c04370436f4d3340d460d25b788f

SHA256
9d9a156c6ca2929f0f22c310260723e28428cb38995c0f940f2617b25e15b618

SHA512
5b515b5975fda333a6d9ca0e7de81dbc70311f4ecd8be22770d31c5f159807f653c87acf9df4a72b2d0664f0ef3141088de7f5aa12efc6307715c1c31ba55bb6

Download Submit
C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\logo.png

Filesize
2KB

MD5
afeed45df4d74d93c260a86e71e09102

SHA1
2cc520e3d23f6b371c288645649a482a5db7ccd9

SHA256
f5fb1e3a7bca4e2778903e8299c63ab34894e810a174b0143b79183c0fa5072f

SHA512
778a6c494eab333c5bb00905adf556c019160c5ab858415c1dd918933f494faf3650e60845d557171c6e1370bcff687672d5af0f647302867b449a2cff9b925d

Download Submit
C:\Program Files (x86)\WindowsInstallationAssistant\resources\ux\marketing.png

Filesize
420B

MD5
0968430a52f9f877d83ef2b46b107631

SHA1
c1436477b4ee1ee0b0c81c9036eb228e4038b376

SHA256
b210f3b072c60c2feb959e56c529e24cec77c1fcf933dcadad1f491f974f5e96

SHA512
7a8a15524aecdb48753cc201c215df19bc79950373adc6dd4a8f641e3add53eba31d1309bf671e3b9e696616a3badce65839b211591a2eeebb9306390d81cfcf

Download Submit
C:\Users\Admin\AppData\Local\Temp\WXU8D7B.tmp\appraiserxp.dll

Filesize
363KB

MD5
cbb270591c9a1bfb1b10559ab672f705

SHA1
fed0d59d60709b5b05b9d31030ea7a5422767a7e

SHA256
770a9a15e1eb8e2729f23a3d262b55bef16e4bb7822a2d16eeac3db35a116d7f

SHA512
67c4154d47981f22965966aa823dc0e05872b2f6d8fc7d80b4130f1cdb8bf9f326a20980e29c085e2940fc1f7b033b85d2eb192f5bda2da136364a842ea20f6a

Download Submit
C:\Users\Admin\AppData\Local\Temp\WXU8D7B.tmp\resources\ux\Microsoft.WinJS\css\oobe-desktop.css

Filesize
39KB

MD5
5ad8ceea06e280b9b42e1b8df4b8b407

SHA1
693ea7ac3f9fed186e0165e7667d2c41376c5d61

SHA256
03a724309e738786023766fde298d17b6ccfcc3d2dbbf5c41725cf93eb891feb

SHA512
1694fa3b9102771eef8a42b367d076c691b002de81eb4334ac6bd7befde747b168e7ed8f94f1c8f8877280f51c44adb69947fc1d899943d25b679a1be71dec84

Download Submit
\Program Files (x86)\WindowsInstallationAssistant\downloader.dll

Filesize
197KB

MD5
5b62ad6ae42f32806062ad1bcb3e2de5

SHA1
8d4a543eac9643931fcb620cd588e2cc1067920a

SHA256
96f7b268820511abeeb6bbfad0918cf9161366bc2f558ef7f011331e7de1d6f3

SHA512
af5bdbc5019b56eb9a32b6d264388e309e36013d43dbe09c61224ba6fabf1ff905371bc5b6ddaa0d5bfedae99cc5a7051f13fbf26cc756793799e568094eabcf

Download Submit