njrat | b4f45f5887e216c7cf4e3635ce16f770de2bcb82c66671bb0c19f0289b090494

General

Target

builder.exe
Size

176KB
MD5

2bf414e4eead5821479afd1c48ca10fd
SHA1

ee27dbb4497e00c234820b0401009680b9739c39
SHA256

b4f45f5887e216c7cf4e3635ce16f770de2bcb82c66671bb0c19f0289b090494
SHA512

1837be8412fde13bffb050d6aefa8c78605dbd91660425b3d3b31629104dc9efdbce869fd0db6ac5b0b12d397c8cff5a197a97aff8ad27cbbbbdfc816f0c3f52
SSDEEP

3072:Y0taY/+zi0ZbYe1g0ujyzdLgJ2Be0XQx3:YAaYmG0Lahyd9

Score

10^/10

njrat redline sectoprat cheat discovery evasion infostealer persistence privilege_escalation rat trojan

Malware Config

Extracted

Family

redline

Botnet

cheat

C2

127.0.0.1:1337

Signatures

RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
infostealer redline

RedLine payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000400000002aa3b-14.dat	family_redline
behavioral1/memory/3996-27-0x0000000000090000-0x00000000000AE000-memory.dmp	family_redline

SectopRAT
SectopRAT is a remote access trojan first seen in November 2019.
trojan rat sectoprat

SectopRAT payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000400000002aa3b-14.dat	family_sectoprat
behavioral1/memory/3996-27-0x0000000000090000-0x00000000000AE000-memory.dmp	family_sectoprat

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2128	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b686448cd18e4753a57a179d9c102a12.exe	Server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b686448cd18e4753a57a179d9c102a12.exe	Server.exe

Executes dropped EXE 2 IoCs

pid	Process
4788	Server.exe
3996	build.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2842058299-443432012-2465494467-1000\Software\Microsoft\Windows\CurrentVersion\Run\b686448cd18e4753a57a179d9c102a12 = "\"C:\\Users\\Admin\\AppData\\Roaming\\Server.exe\" .."	Server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\b686448cd18e4753a57a179d9c102a12 = "\"C:\\Users\\Admin\\AppData\\Roaming\\Server.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 opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	builder.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	build.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	3996	build.exe
Token: SeDebugPrivilege	4788	Server.exe
Token: 33	4788	Server.exe
Token: SeIncBasePriorityPrivilege	4788	Server.exe
Token: 33	4788	Server.exe
Token: SeIncBasePriorityPrivilege	4788	Server.exe
Token: 33	4788	Server.exe
Token: SeIncBasePriorityPrivilege	4788	Server.exe
Token: 33	4788	Server.exe
Token: SeIncBasePriorityPrivilege	4788	Server.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 5052 wrote to memory of 4788	5052	builder.exe	79
PID 5052 wrote to memory of 4788	5052	builder.exe	79
PID 5052 wrote to memory of 4788	5052	builder.exe	79
PID 5052 wrote to memory of 3996	5052	builder.exe	80
PID 5052 wrote to memory of 3996	5052	builder.exe	80
PID 5052 wrote to memory of 3996	5052	builder.exe	80
PID 4788 wrote to memory of 2128	4788	Server.exe	82
PID 4788 wrote to memory of 2128	4788	Server.exe	82
PID 4788 wrote to memory of 2128	4788	Server.exe	82

C:\Users\Admin\AppData\Local\Temp\builder.exe
"C:\Users\Admin\AppData\Local\Temp\builder.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:5052
- C:\Users\Admin\AppData\Roaming\Server.exe
  "C:\Users\Admin\AppData\Roaming\Server.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4788
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\Server.exe" "Server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    - Event Triggered Execution: Netsh Helper DLL
    - System Location Discovery: System Language Discovery
    PID:2128
- C:\Users\Admin\AppData\Roaming\build.exe
  "C:\Users\Admin\AppData\Roaming\build.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

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

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

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

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Server.exe

Filesize
23KB

MD5
25b54f7f39b021b1d5e3a15b04a3490f

SHA1
ab66577f15e700d5e4ab423402bd21f23a67988d

SHA256
c2768f2e91df4955e2582273ffb759e82c5a5aae4e1318b8643e011d0dd0b944

SHA512
cf3a318fa4f56408a38a23e82dc12bbdbeb738ab724c0c4b975d438027990945d399c8daeb56f84afaa79c8c182e0c767d86580d4be55552b9e72bf932a85c01

Download Submit
C:\Users\Admin\AppData\Roaming\build.exe

Filesize
95KB

MD5
ca8b99c9d67aee4b846581461ec6bb2b

SHA1
7c0fd208b99bc69aaf003693aeafbe73cde4658f

SHA256
d53b5ccdc46e2575b7c917ae6414b93028b9fe4df2deda7107a7a470080a9f3a

SHA512
027f3e669560a0668706665101bfb7ca258943f80cc660085428516015fb7a106266b34334afabfd95bf43c348d53d2fe6f9cbf7a6a737314d19524e4bc36a83

Download Submit
memory/3996-26-0x0000000072F5E000-0x0000000072F5F000-memory.dmp

Filesize
4KB

Download
memory/3996-33-0x0000000004E20000-0x0000000004F2A000-memory.dmp

Filesize
1.0MB

Download
memory/3996-37-0x0000000072F50000-0x0000000073701000-memory.dmp

Filesize
7.7MB

Download
memory/3996-36-0x0000000072F5E000-0x0000000072F5F000-memory.dmp

Filesize
4KB

Download
memory/3996-32-0x0000000072F50000-0x0000000073701000-memory.dmp

Filesize
7.7MB

Download
memory/3996-31-0x0000000004B30000-0x0000000004B7C000-memory.dmp

Filesize
304KB

Download
memory/3996-30-0x0000000004B90000-0x0000000004BCC000-memory.dmp

Filesize
240KB

Download
memory/3996-27-0x0000000000090000-0x00000000000AE000-memory.dmp

Filesize
120KB

Download
memory/3996-28-0x00000000051B0000-0x00000000057C8000-memory.dmp

Filesize
6.1MB

Download
memory/3996-29-0x0000000004B10000-0x0000000004B22000-memory.dmp

Filesize
72KB

Download
memory/4788-24-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/4788-35-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/4788-22-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/5052-0-0x0000000075311000-0x0000000075312000-memory.dmp

Filesize
4KB

Download
memory/5052-23-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/5052-2-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download
memory/5052-1-0x0000000075310000-0x00000000758C1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads