njrat | 637c5a6da12669b77450722407c7b63a057e10b5b4f43e6b2ae5a833e9b721e4

General

Target

VPekxMtU.exe
Size

23KB
MD5

f0648c9a052f6709a419fcb293edfd51
SHA1

4c06fd1436794ccb4852cd086bc21c54c5ec53b0
SHA256

637c5a6da12669b77450722407c7b63a057e10b5b4f43e6b2ae5a833e9b721e4
SHA512

d856d260bc9a041674fc1b041204b53b8f48d30b56ed7450a6a1a0d6a07352a002192d60ce42a08f506f57fab6390f000974f36133ae4d323e436e6b92f132bd

Score

10^/10

njrat hacked evasion persistence spyware stealer trojan upx

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacKed

C2

nonspam.hopto.org:1177

Mutex

d190b0faf733c7f5258ca76c3c3a2eb6

Attributes

reg_key
d190b0faf733c7f5258ca76c3c3a2eb6
splitter
|'|'|

Signatures

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

Processes:

server.exe

pid process

1340 server.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

pid	process
1340	server.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/1228-7-0x0000000000400000-0x0000000000472000-memory.dmp	upx
behavioral1/memory/1228-9-0x0000000000400000-0x0000000000472000-memory.dmp	upx
behavioral1/memory/1228-10-0x0000000000400000-0x0000000000472000-memory.dmp	upx

Loads dropped DLL 1 IoCs

Processes:

VPekxMtU.exe

pid process

748 VPekxMtU.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
748	VPekxMtU.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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\d190b0faf733c7f5258ca76c3c3a2eb6 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\d190b0faf733c7f5258ca76c3c3a2eb6 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

server.exe

description pid process target process

PID 1340 set thread context of 1228 1340 server.exe vbc.exe
PID 1340 set thread context of 1456 1340 server.exe vbc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 1340 set thread context of 1228	1340	server.exe	vbc.exe
PID 1340 set thread context of 1456	1340	server.exe	vbc.exe

Suspicious use of AdjustPrivilegeToken 33 IoCs

Processes:

server.exevbc.exevbc.exe

description	pid	process
Token: SeDebugPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: SeDebugPrivilege	1228	vbc.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: SeDebugPrivilege	1456	vbc.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe
Token: 33	1340	server.exe
Token: SeIncBasePriorityPrivilege	1340	server.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

VPekxMtU.exeserver.exe

description	pid	process	target process
PID 748 wrote to memory of 1340	748	VPekxMtU.exe	server.exe
PID 748 wrote to memory of 1340	748	VPekxMtU.exe	server.exe
PID 748 wrote to memory of 1340	748	VPekxMtU.exe	server.exe
PID 748 wrote to memory of 1340	748	VPekxMtU.exe	server.exe
PID 1340 wrote to memory of 1616	1340	server.exe	netsh.exe
PID 1340 wrote to memory of 1616	1340	server.exe	netsh.exe
PID 1340 wrote to memory of 1616	1340	server.exe	netsh.exe
PID 1340 wrote to memory of 1616	1340	server.exe	netsh.exe
PID 1340 wrote to memory of 1228	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1228	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1228	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1228	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1228	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1228	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1228	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1228	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1456	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1456	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1456	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1456	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1456	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1456	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1456	1340	server.exe	vbc.exe
PID 1340 wrote to memory of 1456	1340	server.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\VPekxMtU.exe
"C:\Users\Admin\AppData\Local\Temp\VPekxMtU.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:748

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 SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1340

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
3⤵
PID:1616

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" -f "C:\Users\Admin\AppData\Local\Temp\3195230"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1228

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" -f "C:\Users\Admin\AppData\Local\Temp\1403397"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1456

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\1403397
MD5
e4bf4f7accc657622fe419c0d62419ab

SHA1
c2856936dd3de05bad0da5ca94d6b521e40ab5a2

SHA256
b32fa68b79c5a7ceaa89e8e537efe33a963c499666202611329944bd2c09318e

SHA512
85dc223e39a16ddeba53a4b3d6c9eff14d30ec67dfda1e650da2c9057f640edd033a31868915a31caac0d325d240a7f634f62cd52fbd2adc68bd1d9cb6281431

Download Submit
C:\Users\Admin\AppData\Local\Temp\3195230
MD5
e4bf4f7accc657622fe419c0d62419ab

SHA1
c2856936dd3de05bad0da5ca94d6b521e40ab5a2

SHA256
b32fa68b79c5a7ceaa89e8e537efe33a963c499666202611329944bd2c09318e

SHA512
85dc223e39a16ddeba53a4b3d6c9eff14d30ec67dfda1e650da2c9057f640edd033a31868915a31caac0d325d240a7f634f62cd52fbd2adc68bd1d9cb6281431

Download Submit
C:\Users\Admin\AppData\Local\Temp\server.exe
MD5
f0648c9a052f6709a419fcb293edfd51

SHA1
4c06fd1436794ccb4852cd086bc21c54c5ec53b0

SHA256
637c5a6da12669b77450722407c7b63a057e10b5b4f43e6b2ae5a833e9b721e4

SHA512
d856d260bc9a041674fc1b041204b53b8f48d30b56ed7450a6a1a0d6a07352a002192d60ce42a08f506f57fab6390f000974f36133ae4d323e436e6b92f132bd

Download Submit
C:\Users\Admin\AppData\Local\Temp\server.exe
MD5
f0648c9a052f6709a419fcb293edfd51

SHA1
4c06fd1436794ccb4852cd086bc21c54c5ec53b0

SHA256
637c5a6da12669b77450722407c7b63a057e10b5b4f43e6b2ae5a833e9b721e4

SHA512
d856d260bc9a041674fc1b041204b53b8f48d30b56ed7450a6a1a0d6a07352a002192d60ce42a08f506f57fab6390f000974f36133ae4d323e436e6b92f132bd

Download Submit
\Users\Admin\AppData\Local\Temp\server.exe
MD5
f0648c9a052f6709a419fcb293edfd51

SHA1
4c06fd1436794ccb4852cd086bc21c54c5ec53b0

SHA256
637c5a6da12669b77450722407c7b63a057e10b5b4f43e6b2ae5a833e9b721e4

SHA512
d856d260bc9a041674fc1b041204b53b8f48d30b56ed7450a6a1a0d6a07352a002192d60ce42a08f506f57fab6390f000974f36133ae4d323e436e6b92f132bd

Download Submit
memory/296-11-0x000007FEF6350000-0x000007FEF65CA000-memory.dmp

Filesize
2.5MB

Download
memory/1228-8-0x00000000004700E0-mapping.dmp

Download
memory/1228-9-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/1228-10-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/1228-7-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/1340-3-0x0000000000000000-mapping.dmp

Download
memory/1456-14-0x00000000004700E0-mapping.dmp

Download
memory/1616-6-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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