njrat | a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66

General

Target

a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66.exe
Size

177KB
MD5

adad59681c52a7e1490d8b72457028fb
SHA1

821080dd77cb2b682be93e4ec879dcdf8a47872b
SHA256

a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66
SHA512

f6b715246cb77f495f472109b5cb7c90645d6ed26caddf8fbe74e72066a7608d22f3f213c719208c06d7711364f2e40073ecf68acdc36218826b9fbe096bbfe7
SSDEEP

1536:uWUHZK25eW9V9ge1EBjyO3lg7yZ/nzzGyQCAhtwjIVhmroF:udHZK2jEe1Ej4mPzay8YjIbmMF

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

2876 server.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

4692 netsh.exe

pid	process
2876	server.exe

pid	process
4692	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:

a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66.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-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\4e31aa78d88f8a182bda22b927d269aa = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\4e31aa78d88f8a182bda22b927d269aa = "\"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 31 IoCs

Processes:

server.exe

description	pid	process
Token: SeDebugPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe
Token: 33	2876	server.exe
Token: SeIncBasePriorityPrivilege	2876	server.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66.exeserver.exe

description	pid	process	target process
PID 2340 wrote to memory of 2876	2340	a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66.exe	server.exe
PID 2340 wrote to memory of 2876	2340	a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66.exe	server.exe
PID 2876 wrote to memory of 4692	2876	server.exe	netsh.exe
PID 2876 wrote to memory of 4692	2876	server.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66.exe
"C:\Users\Admin\AppData\Local\Temp\a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2340

C:\Users\Admin\AppData\Local\Temp\server.exe
"C:\Users\Admin\AppData\Local\Temp\server.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2876

C:\Windows\SYSTEM32\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:4692

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
177KB

MD5
adad59681c52a7e1490d8b72457028fb

SHA1
821080dd77cb2b682be93e4ec879dcdf8a47872b

SHA256
a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66

SHA512
f6b715246cb77f495f472109b5cb7c90645d6ed26caddf8fbe74e72066a7608d22f3f213c719208c06d7711364f2e40073ecf68acdc36218826b9fbe096bbfe7

Download Submit
C:\Users\Admin\AppData\Local\Temp\server.exe
Filesize
177KB

MD5
adad59681c52a7e1490d8b72457028fb

SHA1
821080dd77cb2b682be93e4ec879dcdf8a47872b

SHA256
a4fee83713aa0aa22099e7531d1e875eaa3f3e2b7e921721b79c5a68511d8b66

SHA512
f6b715246cb77f495f472109b5cb7c90645d6ed26caddf8fbe74e72066a7608d22f3f213c719208c06d7711364f2e40073ecf68acdc36218826b9fbe096bbfe7

Download Submit
memory/2340-132-0x00007FF9C5C50000-0x00007FF9C6686000-memory.dmp

Filesize
10.2MB

Download
memory/2876-133-0x0000000000000000-mapping.dmp

Download
memory/2876-136-0x00007FF9C5C50000-0x00007FF9C6686000-memory.dmp

Filesize
10.2MB

Download
memory/4692-137-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads