a55b2334334dd206aceea6719cf7ec3bac9b325d84f0607e65f4a3f88b57161e

Analysis

max time kernel
26s
max time network
31s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
06/01/2024, 12:08

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General

Target

46315b54912739075d98433897e86ecd.exe
Size

367KB
MD5

46315b54912739075d98433897e86ecd
SHA1

34d12821cca2589b80d9b5d2c235375563b1b6a0
SHA256

a55b2334334dd206aceea6719cf7ec3bac9b325d84f0607e65f4a3f88b57161e
SHA512

db233bd3bcb55f9504fec776da6df83bac98f6915133ce3dc62aa29de313b9c247dfdbd1164f435ecce337357402e2fc9b05250e7d3f86f316047742ebc51eef
SSDEEP

6144:R/kFr0H89gBk+0AS7qHcrymVwAiO2QVmJYtXbwp0UsaIJT+vybUxGknqwwc2j:R/kpj9wen7q8rzRVmetXbw6UsZWybcn2

Score

7^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2828	winupgrade.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\ime\winupgrade.exe	46315b54912739075d98433897e86ecd.exe
File opened for modification	C:\Windows\ime\winupgrade.exe	46315b54912739075d98433897e86ecd.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Internet Explorer\Main	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\MAIN\Enable Browser Extensions = "no"	winupgrade.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Internet Explorer\Main\Enable Browser Extensions = "no"	winupgrade.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Internet Explorer\Main\Play_Background_Sounds = "no"	winupgrade.exe
Key created	\REGISTRY\USER\.DEFAULT\SoftWare\Microsoft\Internet Explorer\New Windows	winupgrade.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Internet Explorer\New Windows\PopupMgr = "no"	winupgrade.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Internet Explorer\Main	winupgrade.exe

Modifies registry class 34 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\ = "open"	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InternetShortcut\shell\open\command	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InternetShortcut	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ftp\shell\open\command	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ftp\shell\ = "open"	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\http\shell\open\command	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\http\shell\ = "open"	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InternetShortcut\shell	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\file\shell\open\command	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0002DF01-0000-0000-C000-000000000046}	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\open\command	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ftp\shell\open\command\ = "\"C:\\Program Files (x86)\\Internet Explorer\\iexplore.exe\" \"%1\""	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{0002DF01-0000-0000-C000-000000000046}\LocalServer32	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\https\shell\open\command\ = "\"C:\\Program Files (x86)\\Internet Explorer\\iexplore.exe\" \"%1\""	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\http\shell	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\ = "open"	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\https\shell\open\command	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\https\shell\ = "open"	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\file\shell\open	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\open\command\ = "\"C:\\Program Files (x86)\\Internet Explorer\\iexplore.exe\" \"%1\""	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InternetShortcut\shell\open	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\file\shell	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ftp\shell	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\https\shell	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\http\shell\open\command\ = "\"C:\\Program Files (x86)\\Internet Explorer\\iexplore.exe\" \"%1\""	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\open\command	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\file	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\file\shell\ = "open"	winupgrade.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InternetShortcut\shell\Open\command	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\open\command\ = "\"C:\\Program Files (x86)\\Internet Explorer\\iexplore.exe\" \"%1\""	winupgrade.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\file\shell\open\command\ = "\"C:\\Program Files (x86)\\Internet Explorer\\iexplore.exe\" \"%1\""	winupgrade.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2088	46315b54912739075d98433897e86ecd.exe
2088	46315b54912739075d98433897e86ecd.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 340	2088	46315b54912739075d98433897e86ecd.exe	28
PID 2088 wrote to memory of 340	2088	46315b54912739075d98433897e86ecd.exe	28
PID 2088 wrote to memory of 340	2088	46315b54912739075d98433897e86ecd.exe	28
PID 2088 wrote to memory of 340	2088	46315b54912739075d98433897e86ecd.exe	28
PID 340 wrote to memory of 2440	340	net.exe	30
PID 340 wrote to memory of 2440	340	net.exe	30
PID 340 wrote to memory of 2440	340	net.exe	30
PID 340 wrote to memory of 2440	340	net.exe	30
PID 2088 wrote to memory of 2040	2088	46315b54912739075d98433897e86ecd.exe	33
PID 2088 wrote to memory of 2040	2088	46315b54912739075d98433897e86ecd.exe	33
PID 2088 wrote to memory of 2040	2088	46315b54912739075d98433897e86ecd.exe	33
PID 2088 wrote to memory of 2040	2088	46315b54912739075d98433897e86ecd.exe	33

C:\Users\Admin\AppData\Local\Temp\46315b54912739075d98433897e86ecd.exe
"C:\Users\Admin\AppData\Local\Temp\46315b54912739075d98433897e86ecd.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Windows\SysWOW64\net.exe
  net stop McShield
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:340
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop McShield
    3⤵
    PID:2440
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ieflux.exe_deleteme.bat
  2⤵
  PID:2040

C:\Windows\ime\winupgrade.exe
C:\Windows\ime\winupgrade.exe
1⤵
- Executes dropped EXE
- Modifies Internet Explorer settings
- Modifies data under HKEY_USERS
- Modifies registry class
PID:2828

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\ieflux.exe_deleteme.bat

Filesize
64B

MD5
bfcaeabfbce998e551827934f9cab4ad

SHA1
3a91d41d9d42b737bdb82f59b3867d3b4ef27035

SHA256
1813f05035373247df14aeb946d7a38183cd78e9d6ed1f637b45eaff537b382a

SHA512
5a393fc6e5cd0004b8c559b5dbbbc6903c4df29e27df3a4fe26bb8ad40b860f51d10152d7ebf002de6772448411edf3838626c34ce5d2265aa6a9703809831db

Download Submit
C:\Windows\IME\winupgrade.exe

Filesize
653KB

MD5
dd83adadfa69e555fbffaa2dafd119da

SHA1
4d2872c6a5ebe237ce28254cf0a9315616016136

SHA256
2f4a65fecb7195a982b1463002e06324bab25069f65eb1884c45e174c8563280

SHA512
962b88f246a1f3f1c4e38874538fcabfac653a4c4c11e4905abcbbc4b0a75cbf68b9386f05bec189ef90221e08c55908b4181c6aaf8d2b9b4c8a39332e3e71cd

Download Submit
memory/2088-14-0x0000000000400000-0x000000000051F000-memory.dmp

Filesize
1.1MB

Download
memory/2088-1-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/2088-0-0x0000000000400000-0x000000000051F000-memory.dmp

Filesize
1.1MB

Download
memory/2828-5-0x0000000000400000-0x00000000004AA200-memory.dmp

Filesize
680KB

Download
memory/2828-6-0x00000000002E0000-0x00000000002E1000-memory.dmp

Filesize
4KB

Download
memory/2828-16-0x0000000000400000-0x00000000004AA200-memory.dmp

Filesize
680KB

Download
memory/2828-18-0x0000000000400000-0x00000000004AA200-memory.dmp

Filesize
680KB

Download
memory/2828-19-0x0000000000400000-0x00000000004AA200-memory.dmp

Filesize
680KB

Download
memory/2828-20-0x0000000000400000-0x00000000004AA200-memory.dmp

Filesize
680KB

Download
memory/2828-21-0x0000000000400000-0x00000000004AA200-memory.dmp

Filesize
680KB

Download
memory/2828-22-0x0000000000400000-0x00000000004AA200-memory.dmp

Filesize
680KB

Download
memory/2828-23-0x0000000000400000-0x00000000004AA200-memory.dmp

Filesize
680KB

Download