njrat | 263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30ee

General

Target

263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe
Size

55KB
MD5

505c5271b804039b329f346d550e4590
SHA1

0583bff4aef09b6698e6903118568ade640252d9
SHA256

263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30ee
SHA512

a6ac8e886dfcae0dea31e83df7c702be23e6c39c2ece4a7da3d31f3c8fbb9aa503df78bd99f28dedde5bedef8185ba498a139dea73dc5cf1b0a1dc4e88cc7daf
SSDEEP

1536:SXJYUmUYaB3Ky8ibpUfR/WViL8cIbJDLtff:WYe5EyNbkuVioBd9ff

Score

10^/10

njrat 1 discovery execution persistence trojan

Malware Config

Extracted

Family

njrat

Version

im523

Botnet

1

C2

172.0.0.1:11111

94.131.109.101:11111

Mutex

bea40e08f77dcbe9528c9454b4346452

Attributes

reg_key
bea40e08f77dcbe9528c9454b4346452
splitter
|'|'|

Signatures

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

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	RegAsm.exe

Executes dropped EXE 1 IoCs

pid	Process
3928	svchost.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\system = "C:\\Windows\\SysWOW64\\SystemX86.exe"	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1304	powershell.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\SystemX86.exe	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1756 set thread context of 2544	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	98

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe	RegAsm.exe

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

System Information Discovery
T1082

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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1304	powershell.exe
1304	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1304	powershell.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1756 wrote to memory of 1304	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	96
PID 1756 wrote to memory of 1304	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	96
PID 1756 wrote to memory of 1304	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	96
PID 1756 wrote to memory of 2544	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	98
PID 1756 wrote to memory of 2544	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	98
PID 1756 wrote to memory of 2544	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	98
PID 1756 wrote to memory of 2544	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	98
PID 1756 wrote to memory of 2544	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	98
PID 1756 wrote to memory of 2544	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	98
PID 1756 wrote to memory of 2544	1756	263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe	98
PID 2544 wrote to memory of 3928	2544	RegAsm.exe	101
PID 2544 wrote to memory of 3928	2544	RegAsm.exe	101
PID 2544 wrote to memory of 3928	2544	RegAsm.exe	101

C:\Users\Admin\AppData\Local\Temp\263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe
"C:\Users\Admin\AppData\Local\Temp\263a3b04d6cc97c62f984c326ffa98ba38b077e06a9c3d4b79d734c34ceb30eeN.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1756
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Remove-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'system';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'system' -Value '"C:\Windows\SysWOW64\SystemX86.exe"' -PropertyType 'String'
  2⤵
  - Adds Run key to start application
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1304
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Checks computer location settings
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2544
- - C:\ProgramData\svchost.exe
    "C:\ProgramData\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

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:\ProgramData\svchost.exe

Filesize
63KB

MD5
0d5df43af2916f47d00c1573797c1a13

SHA1
230ab5559e806574d26b4c20847c368ed55483b0

SHA256
c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc

SHA512
f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1nb4pzs5.osy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1304-29-0x0000000005D00000-0x0000000006054000-memory.dmp

Filesize
3.3MB

Download
memory/1304-41-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/1304-37-0x00000000068E0000-0x00000000068FA000-memory.dmp

Filesize
104KB

Download
memory/1304-36-0x0000000006950000-0x00000000069E6000-memory.dmp

Filesize
600KB

Download
memory/1304-35-0x0000000006520000-0x000000000656C000-memory.dmp

Filesize
304KB

Download
memory/1304-34-0x00000000063B0000-0x00000000063CE000-memory.dmp

Filesize
120KB

Download
memory/1304-19-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/1304-38-0x00000000069F0000-0x0000000006A12000-memory.dmp

Filesize
136KB

Download
memory/1304-23-0x0000000005C90000-0x0000000005CF6000-memory.dmp

Filesize
408KB

Download
memory/1304-22-0x0000000005C20000-0x0000000005C86000-memory.dmp

Filesize
408KB

Download
memory/1304-16-0x0000000002AC0000-0x0000000002AF6000-memory.dmp

Filesize
216KB

Download
memory/1304-21-0x0000000005400000-0x0000000005422000-memory.dmp

Filesize
136KB

Download
memory/1304-20-0x0000000005580000-0x0000000005BA8000-memory.dmp

Filesize
6.2MB

Download
memory/1304-14-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/1756-8-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/1756-5-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/1756-1-0x00000000008B0000-0x00000000008C4000-memory.dmp

Filesize
80KB

Download
memory/1756-15-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/1756-2-0x00000000058F0000-0x0000000005E94000-memory.dmp

Filesize
5.6MB

Download
memory/1756-10-0x0000000005540000-0x000000000555E000-memory.dmp

Filesize
120KB

Download
memory/1756-9-0x00000000052C0000-0x00000000052D2000-memory.dmp

Filesize
72KB

Download
memory/1756-0-0x00000000747EE000-0x00000000747EF000-memory.dmp

Filesize
4KB

Download
memory/1756-7-0x00000000747EE000-0x00000000747EF000-memory.dmp

Filesize
4KB

Download
memory/1756-3-0x0000000005340000-0x00000000053D2000-memory.dmp

Filesize
584KB

Download
memory/1756-6-0x0000000005580000-0x00000000055F6000-memory.dmp

Filesize
472KB

Download
memory/1756-4-0x00000000052D0000-0x00000000052DA000-memory.dmp

Filesize
40KB

Download
memory/2544-18-0x0000000004E70000-0x0000000004F0C000-memory.dmp

Filesize
624KB

Download
memory/2544-12-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2544-17-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/2544-53-0x00000000747E0000-0x0000000074F90000-memory.dmp

Filesize
7.7MB

Download
memory/3928-55-0x0000000000FA0000-0x0000000000FB2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads