e9b99706a9b48b09974dd18c1af8a0e402ccddcaa0c91edf43fdd838128a7408

Analysis

max time kernel
217s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-11-2024 02:14

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General

Target

082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe
Size

949KB
MD5

4f6011ff98c257441ed388c607c5c7fe
SHA1

cff8ccf239f9513ee2272c7e710b3d40e4d17ae4
SHA256

3d9af2cb75bf685209ca0cfcc84e7ece27a2007044c2dc4b0ddcbc7fb141ad3e
SHA512

1951009509dfaeccca69c1d94bd40e8f090174fa106b11f993c8cb5c1df7df345aa07978a1be927a12cf54de397c3379f91ba098d5b9aaa7c47e2fece5fe8329
SSDEEP

12288:BuucC/r6vkvt5Bv1s+7+bK6ErCd46hDjHyVqZOf3OD/RC6UE1ygKraRVR8TqjN:EucEa+7ubPxj57/LkrU5

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

msunet.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,,C:\\Windows\\system32\\msunet.exe"	msunet.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,,C:\\Windows\\system32\\msunet.exe"	msunet.exe

Executes dropped EXE 1 IoCs

Processes:

msunet.exe

pid process

2664 msunet.exe

pid	process
2664	msunet.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

msunet.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*MSUpdate = "C:\\Windows\\system32\\msunet.exe"	msunet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSUpdate = "C:\\Windows\\system32\\msunet.exe"	msunet.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\MSUpdate = "C:\\Windows\\system32\\msunet.exe"	msunet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\*MSUpdate = "C:\\Windows\\system32\\msunet.exe"	msunet.exe

Drops file in System32 directory 2 IoCs

Processes:

082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe

description	ioc	process
File opened for modification	C:\Windows\system32\msunet.exe	082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe
File created	C:\Windows\system32\msunet.exe	082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exemsunet.exe

pid	process
2348	082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe
2348	082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe
2664	msunet.exe
2664	msunet.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exemsunet.exe

description	pid	process
Token: SeDebugPrivilege	2348	082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe
Token: SeDebugPrivilege	2664	msunet.exe
Token: SeDebugPrivilege	2664	msunet.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe

description	pid	process	target process
PID 2348 wrote to memory of 2664	2348	082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe	msunet.exe
PID 2348 wrote to memory of 2664	2348	082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe	msunet.exe
PID 2348 wrote to memory of 2664	2348	082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe	msunet.exe

System policy modification 1 TTPs 2 IoCs

evasion

Modify Registry

T1112

Processes:

msunet.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDriveTypeAutoRun = "145"	msunet.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDriveAutoRun = "0"	msunet.exe

C:\Users\Admin\AppData\Local\Temp\082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe
"C:\Users\Admin\AppData\Local\Temp\082671641341d89fe49d0da717846035ba6af02edb59840148eddc3586d21557.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2348
- C:\Windows\system32\msunet.exe
  "C:\Windows\system32\msunet.exe" /nogui
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - System policy modification
  PID:2664

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

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

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:\Windows\System32\msunet.exe

Filesize
949KB

MD5
4f6011ff98c257441ed388c607c5c7fe

SHA1
cff8ccf239f9513ee2272c7e710b3d40e4d17ae4

SHA256
3d9af2cb75bf685209ca0cfcc84e7ece27a2007044c2dc4b0ddcbc7fb141ad3e

SHA512
1951009509dfaeccca69c1d94bd40e8f090174fa106b11f993c8cb5c1df7df345aa07978a1be927a12cf54de397c3379f91ba098d5b9aaa7c47e2fece5fe8329

Download Submit
memory/2348-0-0x000007FEF6083000-0x000007FEF6084000-memory.dmp

Filesize
4KB

Download
memory/2348-1-0x0000000000D40000-0x0000000000E32000-memory.dmp

Filesize
968KB

Download
memory/2348-2-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2348-3-0x000007FEF6083000-0x000007FEF6084000-memory.dmp

Filesize
4KB

Download
memory/2348-4-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2348-12-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2664-10-0x0000000000E40000-0x0000000000F32000-memory.dmp

Filesize
968KB

Download
memory/2664-11-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2664-13-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2664-14-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download