8b77fc24e7bffbd595c5aeba1b628f2a3820b0ceb77aca880d19cc324a3b8ce0

Analysis

max time kernel
143s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
02/02/2024, 11:35

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General

Target

89678289736124fc58686e09c5cfc13a.exe
Size

13KB
MD5

89678289736124fc58686e09c5cfc13a
SHA1

a38cfdd6a53b6ed4dfa02dde05015f40bd25e234
SHA256

8b77fc24e7bffbd595c5aeba1b628f2a3820b0ceb77aca880d19cc324a3b8ce0
SHA512

8ebaa5236e87a2e176bafd4f1f4d140faf38170f273676a21c0cafc408f78c2e4dd4c6127cb49b3ccdea9f895b35f180e9c5b8e76915ccf9facb96227bb6be34
SSDEEP

384:4cJoXJz6ttH0lbX4qHmOpOmjuwli/roDiCF2yPP:4pXJuY4hG5g/8VAy3

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\sewmwrii.dll = "{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}"	89678289736124fc58686e09c5cfc13a.exe

Loads dropped DLL 1 IoCs

pid	Process
4968	89678289736124fc58686e09c5cfc13a.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\sewmwrii.tmp	89678289736124fc58686e09c5cfc13a.exe
File opened for modification	C:\Windows\SysWOW64\sewmwrii.tmp	89678289736124fc58686e09c5cfc13a.exe
File opened for modification	C:\Windows\SysWOW64\sewmwrii.nls	89678289736124fc58686e09c5cfc13a.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}	89678289736124fc58686e09c5cfc13a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}\InProcServer32	89678289736124fc58686e09c5cfc13a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}\InProcServer32\ = "C:\\Windows\\SysWow64\\sewmwrii.dll"	89678289736124fc58686e09c5cfc13a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{21BE5FDF-D4CB-4850-AD99-21E68B50BF3F}\InProcServer32\ThreadingModel = "Apartment"	89678289736124fc58686e09c5cfc13a.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4968	89678289736124fc58686e09c5cfc13a.exe
4968	89678289736124fc58686e09c5cfc13a.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4968	89678289736124fc58686e09c5cfc13a.exe
4968	89678289736124fc58686e09c5cfc13a.exe
4968	89678289736124fc58686e09c5cfc13a.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4968 wrote to memory of 2848	4968	89678289736124fc58686e09c5cfc13a.exe	90
PID 4968 wrote to memory of 2848	4968	89678289736124fc58686e09c5cfc13a.exe	90
PID 4968 wrote to memory of 2848	4968	89678289736124fc58686e09c5cfc13a.exe	90

C:\Users\Admin\AppData\Local\Temp\89678289736124fc58686e09c5cfc13a.exe
"C:\Users\Admin\AppData\Local\Temp\89678289736124fc58686e09c5cfc13a.exe"
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4968
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\D8AD.tmp.bat
  2⤵
  PID:2848

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\D8AD.tmp.bat

Filesize
179B

MD5
916fa2c2243d08105f4ca97f30a0da61

SHA1
fcd0a477b8e297902c6cde5c479bf935e970520d

SHA256
ffb5a3e6d3d5ba67513e07b6e518bc5a3c2664920d0001f4a7e0c0c4c26b26c4

SHA512
4daff4dfd003f006b595379d9613dc52830ba61a4b220c3e4eeb20260f2bff555f99c612534eb4980e9c4839aae99f50e4d6530ed2a202d0f4138f35b4ac0f62

Download Submit
C:\Windows\SysWOW64\sewmwrii.tmp

Filesize
722KB

MD5
a158466f0a11d5b0d4ff99eb39e9f453

SHA1
7ddf973fc8a4e8e81040d6f801564e9c8838bc51

SHA256
9ef2c46b18945bb1ad065793f409ac93017c5f8a68a46b5d593dea5a59281e06

SHA512
9e0b74e2b649f11c05e517c8d881b6ffeb63309c7e7b1819c6c39931444cb10b770bfd9407d2de6d03d6cd98e0ad18ca203c59b59852c405a3358ebe3cfdbd51

Download Submit
memory/4968-13-0x0000000020000000-0x0000000020008000-memory.dmp

Filesize
32KB

Download
memory/4968-18-0x0000000020000000-0x0000000020008000-memory.dmp

Filesize
32KB

Download