abfcae799cbe35f002f71a15bea7e666654effbaa3a736a472beb98addb09c2d

Analysis

max time kernel
207s
max time network
210s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
04-10-2024 14:21

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General

Target

MailUpdate.exe
Size

93KB
MD5

9269b1758a4151f9b49c11967ac76628
SHA1

cdb7ede668e9f9b69950e29ca3e05b76daa1c0fc
SHA256

abfcae799cbe35f002f71a15bea7e666654effbaa3a736a472beb98addb09c2d
SHA512

0644e2fce92204f07172ecc7c36077784688c7c16cd97e121e8a0d3444c0c2507e765cb14b7421055731996de70de97785c518e60c3b4a2903bfc85496aefd32
SSDEEP

768:GY3m84BMPdPwchQW6aGro1CRaXPKG548gmKXxrjEtCdnl2pi1Rz4Rk3ssGdpZgS7:s8GMlP6aGrwCCX4ljEwzGi1dDEDZgS

Score

8^/10

discovery evasion persistence privilege_escalation

Malware Config

Signatures

Disables Task Manager via registry modification
evasion

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1140	netsh.exe

Drops startup file 6 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe	server.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b0eaaca670b21e14c7e7fc8a3127b33dWindows Update.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b0eaaca670b21e14c7e7fc8a3127b33dWindows Update.exe	server.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Explower.exe	server.exe

Executes dropped EXE 1 IoCs

pid	Process
4808	server.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Explower.exe	server.exe
File created	C:\Windows\SysWOW64\Explower.exe	server.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Explower.exe	server.exe
File opened for modification	C:\Program Files (x86)\Explower.exe	server.exe

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

System Information Discovery
T1082

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MailUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4808	server.exe

Suspicious use of AdjustPrivilegeToken 51 IoCs

description	pid	Process
Token: SeDebugPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe
Token: 33	4808	server.exe
Token: SeIncBasePriorityPrivilege	4808	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 4808	1976	MailUpdate.exe	78
PID 1976 wrote to memory of 4808	1976	MailUpdate.exe	78
PID 1976 wrote to memory of 4808	1976	MailUpdate.exe	78
PID 4808 wrote to memory of 1140	4808	server.exe	79
PID 4808 wrote to memory of 1140	4808	server.exe	79
PID 4808 wrote to memory of 1140	4808	server.exe	79

C:\Users\Admin\AppData\Local\Temp\MailUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\MailUpdate.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Users\Admin\AppData\Roaming\server.exe
  "C:\Users\Admin\AppData\Roaming\server.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4808
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\server.exe" "server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:1140

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\app

Filesize
4B

MD5
047dda8d29bbbf2b6e1c3f4212189eba

SHA1
eb10217bbf887b1ad9b984cb7a559b177e2c762a

SHA256
afd43463eba279dc102afa66f3ef7173885c540c02776217638de34e03486125

SHA512
84c38a784fa77686de5be91738fffd0371ca667eff0e117c87e8e2d676ef29b7defe21c7bfa83f00ef967d73d3983fb038bd07b93fde963ec5ae10a2f569a822

Download Submit
C:\Users\Admin\AppData\Roaming\server.exe

Filesize
93KB

MD5
9269b1758a4151f9b49c11967ac76628

SHA1
cdb7ede668e9f9b69950e29ca3e05b76daa1c0fc

SHA256
abfcae799cbe35f002f71a15bea7e666654effbaa3a736a472beb98addb09c2d

SHA512
0644e2fce92204f07172ecc7c36077784688c7c16cd97e121e8a0d3444c0c2507e765cb14b7421055731996de70de97785c518e60c3b4a2903bfc85496aefd32

Download Submit
memory/1976-0-0x0000000074F01000-0x0000000074F02000-memory.dmp

Filesize
4KB

Download
memory/1976-1-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/1976-2-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/1976-13-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/4808-14-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/4808-15-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download
memory/4808-36-0x0000000074F00000-0x00000000754B1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads