njrat | a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e

General

Target

a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe
Size

443KB
MD5

21b7aa9ee2bf500e086236044c072e95
SHA1

f2f6e913df46609733c6b60e1b463a729c4d5a14
SHA256

a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e
SHA512

ce038c09e26d10dbbecdb4e09f84450ae55794e9b1fb0cf113106c8a3cb420ed3983baed9b35384f0fba09842416230515bdcabbe4b7cbf0891b9a377faf5984
SSDEEP

6144:iybSKuA7VgHTXmFvmrDJR+fueWf6z7JlEaX7UL7kz:iybSOWHTgIIWf6zXbU

Score

10^/10

njrat evasion persistence trojan

Malware Config

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
Executes dropped EXE 1 IoCs

Processes:

server.exe

pid process

3744 server.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

3712 netsh.exe

pid	process
3744	server.exe

pid	process
3712	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

Processes:

a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe

Drops startup file 2 IoCs

Processes:

server.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e54ea5bda0ba3d62cae87c94228e53f6.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e54ea5bda0ba3d62cae87c94228e53f6.exe	server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

server.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e54ea5bda0ba3d62cae87c94228e53f6 = "\"C:\\ProgramData\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e54ea5bda0ba3d62cae87c94228e53f6 = "\"C:\\ProgramData\\server.exe\" .."	server.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 22 IoCs

Processes:

a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exeserver.exe

description	pid	process
Token: SeDebugPrivilege	4216	a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe
Token: 33	4216	a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe
Token: SeIncBasePriorityPrivilege	4216	a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe
Token: SeDebugPrivilege	3744	server.exe
Token: 33	3744	server.exe
Token: SeIncBasePriorityPrivilege	3744	server.exe
Token: 33	3744	server.exe
Token: SeIncBasePriorityPrivilege	3744	server.exe
Token: 33	3744	server.exe
Token: SeIncBasePriorityPrivilege	3744	server.exe
Token: 33	3744	server.exe
Token: SeIncBasePriorityPrivilege	3744	server.exe
Token: 33	3744	server.exe
Token: SeIncBasePriorityPrivilege	3744	server.exe
Token: 33	3744	server.exe
Token: SeIncBasePriorityPrivilege	3744	server.exe
Token: 33	3744	server.exe
Token: SeIncBasePriorityPrivilege	3744	server.exe
Token: 33	3744	server.exe
Token: SeIncBasePriorityPrivilege	3744	server.exe
Token: 33	3744	server.exe
Token: SeIncBasePriorityPrivilege	3744	server.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exeserver.exe

description	pid	process	target process
PID 4216 wrote to memory of 3744	4216	a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe	server.exe
PID 4216 wrote to memory of 3744	4216	a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe	server.exe
PID 3744 wrote to memory of 3712	3744	server.exe	netsh.exe
PID 3744 wrote to memory of 3712	3744	server.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe
"C:\Users\Admin\AppData\Local\Temp\a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4216

C:\ProgramData\server.exe
"C:\ProgramData\server.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3744

C:\Windows\SYSTEM32\netsh.exe
netsh firewall add allowedprogram "C:\ProgramData\server.exe" "server.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:3712

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\server.exe
Filesize
443KB

MD5
21b7aa9ee2bf500e086236044c072e95

SHA1
f2f6e913df46609733c6b60e1b463a729c4d5a14

SHA256
a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e

SHA512
ce038c09e26d10dbbecdb4e09f84450ae55794e9b1fb0cf113106c8a3cb420ed3983baed9b35384f0fba09842416230515bdcabbe4b7cbf0891b9a377faf5984

Download Submit
C:\ProgramData\server.exe
Filesize
443KB

MD5
21b7aa9ee2bf500e086236044c072e95

SHA1
f2f6e913df46609733c6b60e1b463a729c4d5a14

SHA256
a4e810d15491dd0d381e6846ef18d89d41d351b3995d8ddc9bc68b68d739506e

SHA512
ce038c09e26d10dbbecdb4e09f84450ae55794e9b1fb0cf113106c8a3cb420ed3983baed9b35384f0fba09842416230515bdcabbe4b7cbf0891b9a377faf5984

Download Submit
memory/3712-137-0x0000000000000000-mapping.dmp

Download
memory/3744-133-0x0000000000000000-mapping.dmp

Download
memory/3744-136-0x00007FF9D2630000-0x00007FF9D3066000-memory.dmp

Filesize
10.2MB

Download
memory/4216-132-0x00007FF9D2630000-0x00007FF9D3066000-memory.dmp

Filesize
10.2MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads