njrat | 291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef

General

Target

291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef.exe
Size

23KB
MD5

a56bfdad420792958d3cb2bdf4c09f3b
SHA1

6a9cbb76b10dd5e2dce4f843bc53057d8a73d304
SHA256

291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef
SHA512

b539aad86a9880fdc674673afdbbaf30b819ca3e79e4b8e404302d83f64b13c665d430222784c6f43722333b76b447e12eefd5d4da006db27623f1ebe965e9b0
SSDEEP

384:CwTSiYWD2Z7w3CsJeiecwJ3fw6FgzeAh33RtmRvR6JZlbw8hqIusZzZum7:hvZiBK1edJRpcnuh4

Score

10^/10

njrat silent.thm evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

SILENT.THM

C2

silent1213.no-ip.biz:5552

Mutex

69f4a342b3ced3a141770e9ba14bb6e5

Attributes

reg_key
69f4a342b3ced3a141770e9ba14bb6e5
splitter
|'|'|

Signatures

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

Processes:

server.exe

pid process

4088 server.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

4364 netsh.exe

pid	process
4088	server.exe

pid	process
4364	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:

291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef.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-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\69f4a342b3ced3a141770e9ba14bb6e5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\69f4a342b3ced3a141770e9ba14bb6e5 = "\"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 33 IoCs

Processes:

server.exe

description	pid	process
Token: SeDebugPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe
Token: 33	4088	server.exe
Token: SeIncBasePriorityPrivilege	4088	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef.exeserver.exe

description	pid	process	target process
PID 3208 wrote to memory of 4088	3208	291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef.exe	server.exe
PID 3208 wrote to memory of 4088	3208	291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef.exe	server.exe
PID 3208 wrote to memory of 4088	3208	291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef.exe	server.exe
PID 4088 wrote to memory of 4364	4088	server.exe	netsh.exe
PID 4088 wrote to memory of 4364	4088	server.exe	netsh.exe
PID 4088 wrote to memory of 4364	4088	server.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef.exe
"C:\Users\Admin\AppData\Local\Temp\291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3208

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:4088

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:4364

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\server.exe
Filesize
23KB

MD5
a56bfdad420792958d3cb2bdf4c09f3b

SHA1
6a9cbb76b10dd5e2dce4f843bc53057d8a73d304

SHA256
291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef

SHA512
b539aad86a9880fdc674673afdbbaf30b819ca3e79e4b8e404302d83f64b13c665d430222784c6f43722333b76b447e12eefd5d4da006db27623f1ebe965e9b0

Download Submit
C:\Users\Admin\AppData\Local\Temp\server.exe
Filesize
23KB

MD5
a56bfdad420792958d3cb2bdf4c09f3b

SHA1
6a9cbb76b10dd5e2dce4f843bc53057d8a73d304

SHA256
291957bae379206e49923abb253b2c7e1ac4e5284b3490d736aa396a1dc2baef

SHA512
b539aad86a9880fdc674673afdbbaf30b819ca3e79e4b8e404302d83f64b13c665d430222784c6f43722333b76b447e12eefd5d4da006db27623f1ebe965e9b0

Download Submit
memory/3208-132-0x0000000074A30000-0x0000000074FE1000-memory.dmp

Filesize
5.7MB

Download
memory/3208-136-0x0000000074A30000-0x0000000074FE1000-memory.dmp

Filesize
5.7MB

Download
memory/4088-133-0x0000000000000000-mapping.dmp

Download
memory/4088-137-0x0000000074A30000-0x0000000074FE1000-memory.dmp

Filesize
5.7MB

Download
memory/4088-139-0x0000000074A30000-0x0000000074FE1000-memory.dmp

Filesize
5.7MB

Download
memory/4364-138-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads