njrat | af740cd97a38f0c8caa0de014c1a164f9615395f568595cfda8f8b31a4eb152e

General

Target

MasonTestingClient.exe
Size

43KB
MD5

ae384612f305b59915b0f2e7655d4fd5
SHA1

d1601fb78141d5e47ce4d07a8aba7425a7976a98
SHA256

af740cd97a38f0c8caa0de014c1a164f9615395f568595cfda8f8b31a4eb152e
SHA512

7a6b039ebc426963edb0065d0d67d9014ce5cc1745b4aa5183f2e8b3cc468b9a01595e69bed00fed364a3113f8a660cee7677514ca9775e13dbf195fac121066
SSDEEP

768:E15gfT7Ts1CEZzSQ5PZIbJ0lzVWSj6PqrONh8uQfEi:E154Ts19ZzSQDIbJczV5j6yrONJ/i

Score

10^/10

njrat byabolhb execution persistence trojan

Malware Config

Extracted

Family

njrat

Version

QUJPTEhC

Botnet

ByABOLHB

C2

abolhb.com:505

Mutex

66f73d9b4e94d115b763eaa1ada7d1f1

Attributes

reg_key
66f73d9b4e94d115b763eaa1ada7d1f1
splitter
|'|'|

Signatures

Njrat family
njrat
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
3876	powershell.exe
5016	powershell.exe
2336	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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	MasonTestingClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MasonTestingClient.lnk	MasonTestingClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MasonTestingClient.lnk	MasonTestingClient.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-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MasonTestingClient = "C:\\ProgramData\\MasonTestingClient.exe"	MasonTestingClient.exe

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

Web Service

T1102

flow	ioc
20	raw.githubusercontent.com
21	raw.githubusercontent.com
19	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
4	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2336	powershell.exe
2336	powershell.exe
3876	powershell.exe
3876	powershell.exe
5016	powershell.exe
5016	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1340	MasonTestingClient.exe
Token: SeDebugPrivilege	2336	powershell.exe
Token: SeDebugPrivilege	3876	powershell.exe
Token: SeDebugPrivilege	5016	powershell.exe
Token: SeDebugPrivilege	1340	MasonTestingClient.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1340 wrote to memory of 2336	1340	MasonTestingClient.exe	83
PID 1340 wrote to memory of 2336	1340	MasonTestingClient.exe	83
PID 1340 wrote to memory of 3876	1340	MasonTestingClient.exe	85
PID 1340 wrote to memory of 3876	1340	MasonTestingClient.exe	85
PID 1340 wrote to memory of 5016	1340	MasonTestingClient.exe	87
PID 1340 wrote to memory of 5016	1340	MasonTestingClient.exe	87

C:\Users\Admin\AppData\Local\Temp\MasonTestingClient.exe
"C:\Users\Admin\AppData\Local\Temp\MasonTestingClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1340
- 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\MasonTestingClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2336
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'MasonTestingClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3876
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\MasonTestingClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5016

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

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
ce4540390cc4841c8973eb5a3e9f4f7d

SHA1
2293f30a6f4c9538bc5b06606c10a50ab4ecef8e

SHA256
e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105

SHA512
2a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tqy1kl3f.gyy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1340-0-0x00007FFBFD203000-0x00007FFBFD205000-memory.dmp

Filesize
8KB

Download
memory/1340-2-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

Filesize
10.8MB

Download
memory/1340-1-0x0000000000DE0000-0x0000000000DF2000-memory.dmp

Filesize
72KB

Download
memory/1340-48-0x000000001CF20000-0x000000001CF2C000-memory.dmp

Filesize
48KB

Download
memory/1340-49-0x00007FFBFD203000-0x00007FFBFD205000-memory.dmp

Filesize
8KB

Download
memory/1340-50-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

Filesize
10.8MB

Download
memory/2336-14-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

Filesize
10.8MB

Download
memory/2336-9-0x00000211D28D0000-0x00000211D28F2000-memory.dmp

Filesize
136KB

Download
memory/2336-15-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

Filesize
10.8MB

Download
memory/2336-18-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

Filesize
10.8MB

Download
memory/2336-3-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads