njrat | aa8b18a4f3db53e54589e2ada92a147219ed8a8a2cf92ebc50f8a670eed226ef

General

Target

MasonClient.exe
Size

43KB
MD5

057f6e706df8a5c267fd6695ab1502f2
SHA1

8ff73f496305d8c9d20c59a6de47df3b6934eb6f
SHA256

aa8b18a4f3db53e54589e2ada92a147219ed8a8a2cf92ebc50f8a670eed226ef
SHA512

f8124aa2784184bae9e49116f4f9c11922ae75e04f53a4ea2db38664d0b316052977e39ebfc473ce1649feada201e415b707aa1e9f7dbbff2d233669a7bb63be
SSDEEP

768:pRg+rDjLP5U1b9foYPRhlzd6aO9Zh5AuffEx:pRvHPUb9wYPlB6aOTPkx

Score

10^/10

njrat xworm byabolhb execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

review-monroe.gl.at.ply.gg:46169

Mutex

lWfA9hbGdE2IDzRq

Attributes

Install_directory
%AppData%
install_file
Mason.exe

aes.plain

Extracted

Family

njrat

Version

QUJPTEhC

Botnet

ByABOLHB

C2

abolhb.com:505

Mutex

66f73d9b4e94d115b763eaa1ada7d1f1

Attributes

reg_key
66f73d9b4e94d115b763eaa1ada7d1f1
splitter
|'|'|

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/1284-48-0x0000000002CD0000-0x0000000002CDE000-memory.dmp	family_xworm

Njrat family
njrat
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm
njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3368	powershell.exe
2620	powershell.exe
3976	powershell.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	MasonClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1144	MasonClient.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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MasonClient = "C:\\ProgramData\\MasonClient.exe"	MasonClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
15	raw.githubusercontent.com
16	raw.githubusercontent.com
17	raw.githubusercontent.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	ip-api.com

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4180	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3976	powershell.exe
3976	powershell.exe
3368	powershell.exe
3368	powershell.exe
2620	powershell.exe
2620	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1284	MasonClient.exe
Token: SeDebugPrivilege	3976	powershell.exe
Token: SeDebugPrivilege	3368	powershell.exe
Token: SeDebugPrivilege	2620	powershell.exe
Token: SeDebugPrivilege	1284	MasonClient.exe
Token: SeDebugPrivilege	1144	MasonClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1284 wrote to memory of 3976	1284	MasonClient.exe	84
PID 1284 wrote to memory of 3976	1284	MasonClient.exe	84
PID 1284 wrote to memory of 3368	1284	MasonClient.exe	86
PID 1284 wrote to memory of 3368	1284	MasonClient.exe	86
PID 1284 wrote to memory of 2620	1284	MasonClient.exe	89
PID 1284 wrote to memory of 2620	1284	MasonClient.exe	89
PID 1284 wrote to memory of 4180	1284	MasonClient.exe	93
PID 1284 wrote to memory of 4180	1284	MasonClient.exe	93

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\MasonClient.exe
"C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1284
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\MasonClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3976
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'MasonClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3368
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\MasonClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2620
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "MasonClient" /tr "C:\Users\Admin\AppData\Roaming\MasonClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4180

C:\Users\Admin\AppData\Roaming\MasonClient.exe
C:\Users\Admin\AppData\Roaming\MasonClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1144

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6c47b3f4e68eebd47e9332eebfd2dd4e

SHA1
67f0b143336d7db7b281ed3de5e877fa87261834

SHA256
8c48b1f2338e5b24094821f41121d2221f1cb3200338f46df49f64d1c4bc3e0c

SHA512
0acf302a9fc971ef9df65ed42c47ea17828e54dff685f4434f360556fd27cdc26a75069f00dcdc14ba174893c6fd7a2cfd8c6c07be3ce35dafee0a006914eaca

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d8cb3e9459807e35f02130fad3f9860d

SHA1
5af7f32cb8a30e850892b15e9164030a041f4bd6

SHA256
2b139c74072ccbdaa17b950f32a6dbc934dfb7af9973d97c9b0d9c498012ba68

SHA512
045239ba31367fbdd59e883f74eafc05724e23bd6e8f0c1e7171ea2496a497eb9e0cfcb57285bb81c4d569daadba43d6ef64c626ca48f1e2a59e8d97f0cc9184

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mh0ofip1.2jt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
43KB

MD5
057f6e706df8a5c267fd6695ab1502f2

SHA1
8ff73f496305d8c9d20c59a6de47df3b6934eb6f

SHA256
aa8b18a4f3db53e54589e2ada92a147219ed8a8a2cf92ebc50f8a670eed226ef

SHA512
f8124aa2784184bae9e49116f4f9c11922ae75e04f53a4ea2db38664d0b316052977e39ebfc473ce1649feada201e415b707aa1e9f7dbbff2d233669a7bb63be

Download Submit
memory/1284-48-0x0000000002CD0000-0x0000000002CDE000-memory.dmp

Filesize
56KB

Download
memory/1284-1-0x0000000000A00000-0x0000000000A12000-memory.dmp

Filesize
72KB

Download
memory/1284-2-0x00007FF98BF20000-0x00007FF98C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/1284-52-0x00007FF98BF20000-0x00007FF98C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/1284-0-0x00007FF98BF23000-0x00007FF98BF25000-memory.dmp

Filesize
8KB

Download
memory/1284-51-0x00007FF98BF23000-0x00007FF98BF25000-memory.dmp

Filesize
8KB

Download
memory/1284-49-0x000000001B820000-0x000000001B82C000-memory.dmp

Filesize
48KB

Download
memory/3976-9-0x0000025FEA7C0000-0x0000025FEA7E2000-memory.dmp

Filesize
136KB

Download
memory/3976-18-0x00007FF98BF20000-0x00007FF98C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/3976-15-0x00007FF98BF20000-0x00007FF98C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/3976-14-0x00007FF98BF20000-0x00007FF98C9E1000-memory.dmp

Filesize
10.8MB

Download
memory/3976-3-0x00007FF98BF20000-0x00007FF98C9E1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads