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Overview
overview
10Static
static
3Readme/Info.txt
windows11-21h2-x64
3Readme/readme+.txt
windows11-21h2-x64
3Readme/readme.txt
windows11-21h2-x64
3Setup/Offi...86.exe
windows11-21h2-x64
10Setup/Offi...86.exe
windows11-21h2-x64
10Setup/Offi...r+.exe
windows11-21h2-x64
10Setup/Offi...er.exe
windows11-21h2-x64
10Analysis
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max time kernel
452s -
max time network
490s -
platform
windows11-21h2_x64 -
resource
win11-20240426-en -
resource tags
arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system -
submitted
17/05/2024, 17:59
Static task
static1
Behavioral task
behavioral1
Sample
Readme/Info.txt
Resource
win11-20240508-en
Behavioral task
behavioral2
Sample
Readme/readme+.txt
Resource
win11-20240508-en
Behavioral task
behavioral3
Sample
Readme/readme.txt
Resource
win11-20240426-en
Behavioral task
behavioral4
Sample
Setup/Office Installer x86.exe
Resource
win11-20240426-en
Behavioral task
behavioral5
Sample
Setup/Office Installer+ x86.exe
Resource
win11-20240426-en
Behavioral task
behavioral6
Sample
Setup/Office Installer+.exe
Resource
win11-20240419-en
Behavioral task
behavioral7
Sample
Setup/Office Installer.exe
Resource
win11-20240426-en
General
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Target
Setup/Office Installer+ x86.exe
-
Size
9.0MB
-
MD5
bb47521d553de207b420f7a16dddf152
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SHA1
ed2fb53becb4b161d58bd90ea42211751bc36c78
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SHA256
167fb686a8182b4380c699306a3c533eb3c264665925ad086329a752e0b2bde1
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SHA512
e0cda4ddccc70b9791a74b27a3c2b3453cbfa1d2a7e78fdb44c3150e90dea061b324e6b76e56a8ef6af7268516fbc97ee278e870b720a4a08887576b09b52801
-
SSDEEP
196608:G73STvxTfg6AiQBhyQbEAkZQdnkW9AVSGfGIJXvaI6HMaJTtGb:G73ATfzyyu4JfdJX
Malware Config
Extracted
https://mrodevicemgr.officeapps.live.com/mrodevicemgrsvc/api/v2/C2RReleaseData
Signatures
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Blocklisted process makes network request 1 IoCs
flow pid Process 2 4232 powershell.exe -
pid Process 4232 powershell.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4232 powershell.exe 4232 powershell.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 2028 Office Installer+ x86.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4232 powershell.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 2028 wrote to memory of 3476 2028 Office Installer+ x86.exe 80 PID 2028 wrote to memory of 3476 2028 Office Installer+ x86.exe 80 PID 2028 wrote to memory of 3476 2028 Office Installer+ x86.exe 80 PID 2028 wrote to memory of 4232 2028 Office Installer+ x86.exe 82 PID 2028 wrote to memory of 4232 2028 Office Installer+ x86.exe 82 PID 2028 wrote to memory of 4232 2028 Office Installer+ x86.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\Setup\Office Installer+ x86.exe"C:\Users\Admin\AppData\Local\Temp\Setup\Office Installer+ x86.exe"1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2028 -
C:\Windows\SysWOW64\reg.exe"reg.exe" add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Script Host\Settings" /v "Enabled" /t REG_DWORD /d 1 /f2⤵PID:3476
-
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell" -nop -command "& { (New-Object Net.WebClient).DownloadFile('https://mrodevicemgr.officeapps.live.com/mrodevicemgrsvc/api/v2/C2RReleaseData', 'C:\Users\Admin\AppData\Local\Temp\files\ver.txt') }"2⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4232
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
-
Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
56KB
MD5028389dd833ca78bfc8e9e10b978ced8
SHA17691fb72b4af44ba01d553caa301b3fe1936c304
SHA25616f19e1dad900af1cdb630401825416399ea6438e29384d5fa9348e0743c9ec6
SHA5128fb363b6096a972935cda152983b214841b467f2ded074ff6b764dfe4940356d734e751c5863fbd3f6dbb411aa5103283281e786103f4cd2cd65ea5e894f7c4b