njrat | 556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11

General

Target

556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe
Size

41KB
MD5

ac4cefd985abf452eb08bdfb8a2f77c7
SHA1

fe77f66e7a2202e586bbfc45153f9c54c4d15a4b
SHA256

556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11
SHA512

e706a6ab561aeb18f37e37a56a761249d3a0a3709e77077d8f2aee6a309f0d5e9a6c33ef92e96d97101467b90ee3177b0f4b7c8a93d618cd4586bde3f73819cc
SSDEEP

768:nZq4YO4rJjDcmhQ0L1bbC2VLL60Mjtur:nINrJUmhHbC+SM

Score

10^/10

njrat evasion persistence trojan

Malware Config

Signatures

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

Processes:

csrss.exe

pid process

564 csrss.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1328 netsh.exe

pid	process
1328	netsh.exe

Drops startup file 2 IoCs

Processes:

csrss.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\97335ed968c8d21501810d2516770677.exe	csrss.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\97335ed968c8d21501810d2516770677.exe	csrss.exe

Loads dropped DLL 1 IoCs

Processes:

556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe

pid process

1236 556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe

pid	process
1236	556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

csrss.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\97335ed968c8d21501810d2516770677 = "\"C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe\" .."	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\97335ed968c8d21501810d2516770677 = "\"C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe\" .."	csrss.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 16 IoCs

Processes:

csrss.exe

pid	process
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe
564	csrss.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

csrss.exe

description pid process

Token: SeDebugPrivilege 564 csrss.exe

description	pid	process
Token: SeDebugPrivilege	564	csrss.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.execsrss.exe

description	pid	process	target process
PID 1236 wrote to memory of 564	1236	556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe	csrss.exe
PID 1236 wrote to memory of 564	1236	556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe	csrss.exe
PID 1236 wrote to memory of 564	1236	556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe	csrss.exe
PID 1236 wrote to memory of 564	1236	556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe	csrss.exe
PID 564 wrote to memory of 1328	564	csrss.exe	netsh.exe
PID 564 wrote to memory of 1328	564	csrss.exe	netsh.exe
PID 564 wrote to memory of 1328	564	csrss.exe	netsh.exe
PID 564 wrote to memory of 1328	564	csrss.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe
"C:\Users\Admin\AppData\Local\Temp\556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1236

C:\Users\Admin\AppData\Roaming\csrss.exe
"C:\Users\Admin\AppData\Roaming\csrss.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:564

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\csrss.exe" "csrss.exe" ENABLE
3⤵
- Modifies Windows Firewall
PID:1328

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\csrss.exe

Filesize
41KB

MD5
ac4cefd985abf452eb08bdfb8a2f77c7

SHA1
fe77f66e7a2202e586bbfc45153f9c54c4d15a4b

SHA256
556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11

SHA512
e706a6ab561aeb18f37e37a56a761249d3a0a3709e77077d8f2aee6a309f0d5e9a6c33ef92e96d97101467b90ee3177b0f4b7c8a93d618cd4586bde3f73819cc

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

Filesize
41KB

MD5
ac4cefd985abf452eb08bdfb8a2f77c7

SHA1
fe77f66e7a2202e586bbfc45153f9c54c4d15a4b

SHA256
556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11

SHA512
e706a6ab561aeb18f37e37a56a761249d3a0a3709e77077d8f2aee6a309f0d5e9a6c33ef92e96d97101467b90ee3177b0f4b7c8a93d618cd4586bde3f73819cc

Download Submit
\Users\Admin\AppData\Roaming\csrss.exe

Filesize
41KB

MD5
ac4cefd985abf452eb08bdfb8a2f77c7

SHA1
fe77f66e7a2202e586bbfc45153f9c54c4d15a4b

SHA256
556f30289be83a5c12777535bc1848b7b0966432500c14089d7340785f7eef11

SHA512
e706a6ab561aeb18f37e37a56a761249d3a0a3709e77077d8f2aee6a309f0d5e9a6c33ef92e96d97101467b90ee3177b0f4b7c8a93d618cd4586bde3f73819cc

Download Submit
memory/564-56-0x0000000000000000-mapping.dmp

Download
memory/564-63-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/564-64-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/1236-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

Filesize
8KB

Download
memory/1236-60-0x0000000074200000-0x00000000747AB000-memory.dmp

Filesize
5.7MB

Download
memory/1328-61-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads