a62ee0552b21391d0e2898786f9ec2473eb21d2e7a69aad9737862835f00f377

General

Target

NL.exe
Size

93KB
MD5

f0c234db804898229a7e3bdea180f915
SHA1

2c61d230f86552e80bf59e6e21546a8dce6f3452
SHA256

a62ee0552b21391d0e2898786f9ec2473eb21d2e7a69aad9737862835f00f377
SHA512

e438734c8811875e8efbea1d6a4ec153ae01a666274c0d8d0751fda6175df3b8f09058f1d7627cabd7b84d873ec31e2407a414c38ecce0797d2718d67beff900
SSDEEP

768:8Y3UbnD9O/pBcxYsbae6GIXb9pDX2t9zPL0OXLeuXxrjEtCdnl2pi1Rz4Rk3EsGg:gbxOx6baIa9ROj00ljEwzGi1dDcDCgS

Score

8^/10

discovery evasion persistence privilege_escalation

Malware Config

Signatures

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
1140	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	NL.exe

Drops startup file 4 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\181a74d35475c4a2137967893bc3cc88Windows Update.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\181a74d35475c4a2137967893bc3cc88Windows Update.exe	server.exe

Executes dropped EXE 1 IoCs

pid	Process
4884	server.exe

Drops autorun.inf file 1 TTPs 4 IoCs

Malware can abuse Windows Autorun to spread further via attached volumes.

Replication Through Removable Media

T1091

description	ioc	Process
File created	C:\autorun.inf	server.exe
File opened for modification	C:\autorun.inf	server.exe
File created	F:\autorun.inf	server.exe
File opened for modification	F:\autorun.inf	server.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Explower.exe	server.exe
File opened for modification	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 value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\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	NL.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
4884	server.exe

Suspicious use of AdjustPrivilegeToken 33 IoCs

description	pid	Process
Token: SeDebugPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe
Token: 33	4884	server.exe
Token: SeIncBasePriorityPrivilege	4884	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4528 wrote to memory of 4884	4528	NL.exe	83
PID 4528 wrote to memory of 4884	4528	NL.exe	83
PID 4528 wrote to memory of 4884	4528	NL.exe	83
PID 4884 wrote to memory of 1140	4884	server.exe	84
PID 4884 wrote to memory of 1140	4884	server.exe	84
PID 4884 wrote to memory of 1140	4884	server.exe	84

C:\Users\Admin\AppData\Local\Temp\NL.exe
"C:\Users\Admin\AppData\Local\Temp\NL.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4528
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Drops autorun.inf file
  - 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:4884
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\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

Replication Through Removable Media

1

T1091

Execution

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Privilege Escalation

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Event Triggered Execution

1

T1546

Netsh Helper DLL

1

T1546.007

Defense Evasion

Impair Defenses

1

T1562

Disable or Modify System Firewall

1

T1562.004

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Replication Through Removable Media

1

T1091

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\server.exe

Filesize
93KB

MD5
f0c234db804898229a7e3bdea180f915

SHA1
2c61d230f86552e80bf59e6e21546a8dce6f3452

SHA256
a62ee0552b21391d0e2898786f9ec2473eb21d2e7a69aad9737862835f00f377

SHA512
e438734c8811875e8efbea1d6a4ec153ae01a666274c0d8d0751fda6175df3b8f09058f1d7627cabd7b84d873ec31e2407a414c38ecce0797d2718d67beff900

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

Filesize
5B

MD5
aa3cce4f6c83d5adfcfc45934b274cc6

SHA1
20e102f0ad9f95951786af279e5215d2ecf85126

SHA256
57a8ff317e913b7e08c0a1758997ed0ffc2f1aba0a3b3310c7697bc207fd15e5

SHA512
f9ec7cd14188f6f7cc00d64dfd7781fc425b7dd24d8fa70d9382cd127bbcc657c734812bc50ba0761393b1a89de9dc02f0d90e8377d6387f24e2d36c98d185cf

Download Submit
memory/4528-0-0x0000000074CF2000-0x0000000074CF3000-memory.dmp

Filesize
4KB

Download
memory/4528-1-0x0000000074CF0000-0x00000000752A1000-memory.dmp

Filesize
5.7MB

Download
memory/4528-2-0x0000000074CF0000-0x00000000752A1000-memory.dmp

Filesize
5.7MB

Download
memory/4528-13-0x0000000074CF0000-0x00000000752A1000-memory.dmp

Filesize
5.7MB

Download
memory/4884-14-0x0000000074CF0000-0x00000000752A1000-memory.dmp

Filesize
5.7MB

Download
memory/4884-15-0x0000000074CF0000-0x00000000752A1000-memory.dmp

Filesize
5.7MB

Download
memory/4884-35-0x0000000074CF0000-0x00000000752A1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads