njrat | f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e

General

Target

f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e.exe
Size

352KB
MD5

40c56e434a5ec038e81b779c59167e04
SHA1

8497592cea36b22d60363128fe6f1c65affb4da9
SHA256

f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e
SHA512

03c3df9e52b2dadc0ba277ea097f4525ca1159e255257a3dbe379d9f43adff1d182b63b2dc3144a206f82db0b13071e3ef1807f7bc2fb04135c60cc0a70434a1
SSDEEP

6144:BZBva6M7np6LDi6+eLn+n8Rh/98QNigfZEBqD/2N9DLPpk:VvkiDi6+eLn+8HOQNqqDODDL2

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

5088 server.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

4760 netsh.exe

pid	process
5088	server.exe

pid	process
4760	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:

f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e.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\13b744fe92a3e5c630f8f3abb1fe36d1.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\13b744fe92a3e5c630f8f3abb1fe36d1.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-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\13b744fe92a3e5c630f8f3abb1fe36d1 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\13b744fe92a3e5c630f8f3abb1fe36d1 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\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 23 IoCs

Processes:

server.exe

description	pid	process
Token: SeDebugPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe
Token: 33	5088	server.exe
Token: SeIncBasePriorityPrivilege	5088	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e.exeserver.exe

description	pid	process	target process
PID 3548 wrote to memory of 5088	3548	f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e.exe	server.exe
PID 3548 wrote to memory of 5088	3548	f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e.exe	server.exe
PID 3548 wrote to memory of 5088	3548	f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e.exe	server.exe
PID 5088 wrote to memory of 4760	5088	server.exe	netsh.exe
PID 5088 wrote to memory of 4760	5088	server.exe	netsh.exe
PID 5088 wrote to memory of 4760	5088	server.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e.exe
"C:\Users\Admin\AppData\Local\Temp\f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3548

C:\Users\Admin\AppData\Local\Temp\server.exe
"C:\Users\Admin\AppData\Local\Temp\server.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5088

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:4760

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

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Downloads

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

Filesize
352KB

MD5
40c56e434a5ec038e81b779c59167e04

SHA1
8497592cea36b22d60363128fe6f1c65affb4da9

SHA256
f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e

SHA512
03c3df9e52b2dadc0ba277ea097f4525ca1159e255257a3dbe379d9f43adff1d182b63b2dc3144a206f82db0b13071e3ef1807f7bc2fb04135c60cc0a70434a1

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

Filesize
352KB

MD5
40c56e434a5ec038e81b779c59167e04

SHA1
8497592cea36b22d60363128fe6f1c65affb4da9

SHA256
f6a036cf49f5efff88cf2d2d43bbcff5e0f8c6c9176b94d6a2adbf7ca0064b7e

SHA512
03c3df9e52b2dadc0ba277ea097f4525ca1159e255257a3dbe379d9f43adff1d182b63b2dc3144a206f82db0b13071e3ef1807f7bc2fb04135c60cc0a70434a1

Download Submit
memory/3548-132-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/3548-136-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/4760-139-0x0000000000000000-mapping.dmp

Download
memory/5088-133-0x0000000000000000-mapping.dmp

Download
memory/5088-137-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/5088-138-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads