njrat | 4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638

General

Target

4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.exe
Size

284KB
MD5

7b7de9fdef6b59dea770e47a0cfed2b8
SHA1

f412f80e1fea88252812a24de47d005fae4f6543
SHA256

4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638
SHA512

70cd76cdaa22533abb0917d730df0715787ef4ba10873c89552809160aa107c8025ae25a8e5233bccd06184c4114f85121d209d77b2fe717eac506fc38a21b83

Score

10^/10

njrat ألــ,ــكــ,ــســ,ــنــ,ــدر evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

ألــ,ــكــ,ــســ,ــنــ,ــدر

C2

mamoon.ddns.net:4444

Mutex

9aa65ce09b29cba73578685095ab8877

Attributes

reg_key
9aa65ce09b29cba73578685095ab8877
splitter
|'|'|

Signatures

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

Processes:

csrss.exe

pid process

1620 csrss.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

pid	process
1620	csrss.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\9aa65ce09b29cba73578685095ab8877.exe	csrss.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9aa65ce09b29cba73578685095ab8877.exe	csrss.exe

Loads dropped DLL 1 IoCs

Processes:

4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.exe

pid process

1848 4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.exe

pid	process
1848	4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Windows\CurrentVersion\Run\9aa65ce09b29cba73578685095ab8877 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss.exe\" .."	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\9aa65ce09b29cba73578685095ab8877 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\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 use of AdjustPrivilegeToken 29 IoCs

Processes:

csrss.exe

description	pid	process
Token: SeDebugPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe
Token: 33	1620	csrss.exe
Token: SeIncBasePriorityPrivilege	1620	csrss.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.execsrss.exe

description	pid	process	target process
PID 1848 wrote to memory of 1620	1848	4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.exe	csrss.exe
PID 1848 wrote to memory of 1620	1848	4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.exe	csrss.exe
PID 1848 wrote to memory of 1620	1848	4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.exe	csrss.exe
PID 1848 wrote to memory of 1620	1848	4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.exe	csrss.exe
PID 1620 wrote to memory of 280	1620	csrss.exe	netsh.exe
PID 1620 wrote to memory of 280	1620	csrss.exe	netsh.exe
PID 1620 wrote to memory of 280	1620	csrss.exe	netsh.exe
PID 1620 wrote to memory of 280	1620	csrss.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.exe
"C:\Users\Admin\AppData\Local\Temp\4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1848

C:\Users\Admin\AppData\Local\Temp\csrss.exe
"C:\Users\Admin\AppData\Local\Temp\csrss.exe"
2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1620

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\csrss.exe" "csrss.exe" ENABLE
3⤵
PID:280

Network

MITRE ATT&CK Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\csrss.exe
MD5
7b7de9fdef6b59dea770e47a0cfed2b8

SHA1
f412f80e1fea88252812a24de47d005fae4f6543

SHA256
4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638

SHA512
70cd76cdaa22533abb0917d730df0715787ef4ba10873c89552809160aa107c8025ae25a8e5233bccd06184c4114f85121d209d77b2fe717eac506fc38a21b83

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss.exe
MD5
7b7de9fdef6b59dea770e47a0cfed2b8

SHA1
f412f80e1fea88252812a24de47d005fae4f6543

SHA256
4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638

SHA512
70cd76cdaa22533abb0917d730df0715787ef4ba10873c89552809160aa107c8025ae25a8e5233bccd06184c4114f85121d209d77b2fe717eac506fc38a21b83

Download Submit
\Users\Admin\AppData\Local\Temp\csrss.exe
MD5
7b7de9fdef6b59dea770e47a0cfed2b8

SHA1
f412f80e1fea88252812a24de47d005fae4f6543

SHA256
4ae1037855a42d00817eadbad82a7599cb0cc7c95b669c5198de99f660e29638

SHA512
70cd76cdaa22533abb0917d730df0715787ef4ba10873c89552809160aa107c8025ae25a8e5233bccd06184c4114f85121d209d77b2fe717eac506fc38a21b83

Download Submit
memory/280-82-0x0000000000000000-mapping.dmp

Download
memory/1620-73-0x00000000008F0000-0x00000000008F1000-memory.dmp

Filesize
4KB

Download
memory/1620-70-0x0000000000000000-mapping.dmp

Download
memory/1620-78-0x00000000046E0000-0x00000000046E1000-memory.dmp

Filesize
4KB

Download
memory/1620-80-0x00000000046E1000-0x00000000046E2000-memory.dmp

Filesize
4KB

Download
memory/1620-81-0x00000000046E6000-0x00000000046F7000-memory.dmp

Filesize
68KB

Download
memory/1848-66-0x0000000000960000-0x0000000000966000-memory.dmp

Filesize
24KB

Download
memory/1848-67-0x0000000004981000-0x0000000004982000-memory.dmp

Filesize
4KB

Download
memory/1848-68-0x0000000004986000-0x0000000004997000-memory.dmp

Filesize
68KB

Download
memory/1848-65-0x0000000004980000-0x0000000004981000-memory.dmp

Filesize
4KB

Download
memory/1848-64-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/1848-63-0x00000000003E0000-0x00000000003EA000-memory.dmp

Filesize
40KB

Download
memory/1848-60-0x00000000002D0000-0x00000000002D1000-memory.dmp

Filesize
4KB

Download
memory/1848-62-0x00000000757C1000-0x00000000757C3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads