njrat | 8ca335734e64485bc7205310599635615cac9d91ecf4492189e90ad07cd75184

General

Target

#1763541093.exe
Size

300.0MB
MD5

c8b67047772884a1bbca4b84cce30dac
SHA1

e55b2a5bffa0c72196f0cb5334436a93362ed419
SHA256

aba07cd1475a52821471edf1d361ffc6ee2a5ea13f8ef4eb7b0bd052f1b92c44
SHA512

98f7e29d0c92545ca579276488dd2ec473a3cdc1024c2313bc0f25118a4682fb2d02c4ea7ea230e8c952a04d2cd4bbc3d5d4660933539786dbcff0529aa9ff95

Score

10^/10

njrat hacked evasion persistence suricata trojan

Malware Config

Extracted

Family

njrat

Version

1.9

Botnet

HacKed

Mutex

Microsoft.Exe

Attributes

reg_key
Microsoft.Exe

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)
suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)
suricata
Executes dropped EXE 1 IoCs

Processes:

jcudych.exe

pid process

800 jcudych.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

pid	process
800	jcudych.exe

Drops startup file 2 IoCs

Processes:

RegAsm.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft.Exe	RegAsm.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft.Exe	RegAsm.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RegAsm.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microsoft.Exe = "\"C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\RegAsm.exe\" .."	RegAsm.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Microsoft.Exe = "\"C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\RegAsm.exe\" .."	RegAsm.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

#1763541093.exejcudych.exe

description	pid	process	target process
PID 1588 set thread context of 268	1588	#1763541093.exe	RegAsm.exe
PID 800 set thread context of 1456	800	jcudych.exe	RegAsm.exe

Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1504 schtasks.exe
1464 schtasks.exe

pid	process
1504	schtasks.exe
1464	schtasks.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

Processes:

#1763541093.exeRegAsm.exejcudych.exe

description	pid	process
Token: SeDebugPrivilege	1588	#1763541093.exe
Token: SeDebugPrivilege	268	RegAsm.exe
Token: 33	268	RegAsm.exe
Token: SeIncBasePriorityPrivilege	268	RegAsm.exe
Token: SeDebugPrivilege	800	jcudych.exe
Token: 33	268	RegAsm.exe
Token: SeIncBasePriorityPrivilege	268	RegAsm.exe
Token: 33	268	RegAsm.exe
Token: SeIncBasePriorityPrivilege	268	RegAsm.exe
Token: 33	268	RegAsm.exe
Token: SeIncBasePriorityPrivilege	268	RegAsm.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

#1763541093.execmd.exeRegAsm.exetaskeng.exejcudych.execmd.exe

description	pid	process	target process
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 268	1588	#1763541093.exe	RegAsm.exe
PID 1588 wrote to memory of 960	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 960	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 960	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 960	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 740	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 740	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 740	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 740	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 640	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 640	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 640	1588	#1763541093.exe	cmd.exe
PID 1588 wrote to memory of 640	1588	#1763541093.exe	cmd.exe
PID 740 wrote to memory of 1504	740	cmd.exe	schtasks.exe
PID 740 wrote to memory of 1504	740	cmd.exe	schtasks.exe
PID 740 wrote to memory of 1504	740	cmd.exe	schtasks.exe
PID 740 wrote to memory of 1504	740	cmd.exe	schtasks.exe
PID 268 wrote to memory of 1780	268	RegAsm.exe	netsh.exe
PID 268 wrote to memory of 1780	268	RegAsm.exe	netsh.exe
PID 268 wrote to memory of 1780	268	RegAsm.exe	netsh.exe
PID 268 wrote to memory of 1780	268	RegAsm.exe	netsh.exe
PID 1304 wrote to memory of 800	1304	taskeng.exe	jcudych.exe
PID 1304 wrote to memory of 800	1304	taskeng.exe	jcudych.exe
PID 1304 wrote to memory of 800	1304	taskeng.exe	jcudych.exe
PID 1304 wrote to memory of 800	1304	taskeng.exe	jcudych.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1456	800	jcudych.exe	RegAsm.exe
PID 800 wrote to memory of 1640	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 1640	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 1640	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 1640	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 1156	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 1156	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 1156	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 1156	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 744	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 744	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 744	800	jcudych.exe	cmd.exe
PID 800 wrote to memory of 744	800	jcudych.exe	cmd.exe
PID 1156 wrote to memory of 1464	1156	cmd.exe	schtasks.exe
PID 1156 wrote to memory of 1464	1156	cmd.exe	schtasks.exe
PID 1156 wrote to memory of 1464	1156	cmd.exe	schtasks.exe
PID 1156 wrote to memory of 1464	1156	cmd.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\#1763541093.exe
"C:\Users\Admin\AppData\Local\Temp\#1763541093.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1588

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
2⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:268

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe" "RegAsm.exe" ENABLE
3⤵
PID:1780

C:\Windows\SysWOW64\cmd.exe
"cmd" /c mkdir "C:\Users\Admin\AppData\Local\Temp\jcudych"
2⤵
PID:960

C:\Windows\SysWOW64\cmd.exe
"cmd" /c schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe'" /f
2⤵
- Suspicious use of WriteProcessMemory
PID:740

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe'" /f
3⤵
- Creates scheduled task(s)
PID:1504

C:\Windows\SysWOW64\cmd.exe
"cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\#1763541093.exe" "C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe"
2⤵
PID:640

C:\Windows\system32\taskeng.exe
taskeng.exe {B8FAA484-32C5-49A1-A965-20208CCAB829} S-1-5-21-2329389628-4064185017-3901522362-1000:QSKGHMYQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1304

C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe
C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:800

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
3⤵
PID:1456

C:\Windows\SysWOW64\cmd.exe
"cmd" /c mkdir "C:\Users\Admin\AppData\Local\Temp\jcudych"
3⤵
PID:1640

C:\Windows\SysWOW64\cmd.exe
"cmd" /c schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe'" /f
3⤵
- Suspicious use of WriteProcessMemory
PID:1156

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /sc minute /mo 1 /tn "Nanias" /tr "'C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe'" /f
4⤵
- Creates scheduled task(s)
PID:1464

C:\Windows\SysWOW64\cmd.exe
"cmd" /c copy "C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe" "C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe"
3⤵
PID:744

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe

MD5
c8b67047772884a1bbca4b84cce30dac

SHA1
e55b2a5bffa0c72196f0cb5334436a93362ed419

SHA256
aba07cd1475a52821471edf1d361ffc6ee2a5ea13f8ef4eb7b0bd052f1b92c44

SHA512
98f7e29d0c92545ca579276488dd2ec473a3cdc1024c2313bc0f25118a4682fb2d02c4ea7ea230e8c952a04d2cd4bbc3d5d4660933539786dbcff0529aa9ff95

Download Submit
C:\Users\Admin\AppData\Local\Temp\jcudych\jcudych.exe

MD5
c8b67047772884a1bbca4b84cce30dac

SHA1
e55b2a5bffa0c72196f0cb5334436a93362ed419

SHA256
aba07cd1475a52821471edf1d361ffc6ee2a5ea13f8ef4eb7b0bd052f1b92c44

SHA512
98f7e29d0c92545ca579276488dd2ec473a3cdc1024c2313bc0f25118a4682fb2d02c4ea7ea230e8c952a04d2cd4bbc3d5d4660933539786dbcff0529aa9ff95

Download Submit
memory/268-58-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/268-59-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/268-60-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/268-62-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/268-64-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/268-66-0x00000000050B0000-0x00000000050B1000-memory.dmp

Filesize
4KB

Download
memory/800-69-0x0000000000AA0000-0x0000000000B06000-memory.dmp

Filesize
408KB

Download
memory/800-70-0x0000000004CE0000-0x0000000004CE1000-memory.dmp

Filesize
4KB

Download
memory/1588-55-0x0000000000290000-0x00000000002F6000-memory.dmp

Filesize
408KB

Download
memory/1588-57-0x0000000075801000-0x0000000075803000-memory.dmp

Filesize
8KB

Download
memory/1588-56-0x0000000004CD0000-0x0000000004CD1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads