njrat | b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5

Analysis

max time kernel
4294215s
max time network
131s
platform
windows7_x64
resource
win7-20220310-en
submitted
14-03-2022 17:24

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General

Target

b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe
Size

1.0MB
MD5

20917a3dd1b362aa03532d623fbb1622
SHA1

b8102145d3937c2ad99f03dd9ee8da4478b0a4a4
SHA256

b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5
SHA512

ce3a5d405be750e1706b8609b2fe391740af446205651f3a93fb5bf3f911ff83ae8af526f13fcefdde0c4a36873d4a04756b40779d1cb4525251aad0407175b8

Score

10^/10

njrat hack evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

HacK

127.0.0.1:1234

Mutex

8a6179254fb2f1e73fe707c1a92f1876

Attributes

reg_key
8a6179254fb2f1e73fe707c1a92f1876
splitter
|'|'|

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Nirsoft 4 IoCs

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\Process Modules DLL.exe	Nirsoft
C:\Users\Admin\AppData\Local\Temp\Process Modules DLL.exe	Nirsoft
C:\Users\Admin\AppData\Local\Temp\Process Modules DLL.exe	Nirsoft
behavioral1/memory/560-66-0x0000000000F40000-0x000000000103C000-memory.dmp	Nirsoft

Executes dropped EXE 3 IoCs

Processes:

Server.exeProcess Modules DLL.exeserver.exe

pid process

1112 Server.exe
560 Process Modules DLL.exe
768 server.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

pid	process
1112	Server.exe
560	Process Modules DLL.exe
768	server.exe

Drops startup file 2 IoCs

Processes:

server.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\8a6179254fb2f1e73fe707c1a92f1876.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\8a6179254fb2f1e73fe707c1a92f1876.exe	server.exe

Loads dropped DLL 3 IoCs

Processes:

b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exeServer.exe

pid	process
1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe
1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe
1112	Server.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-1-5-21-2932610838-281738825-1127631353-1000\Software\Microsoft\Windows\CurrentVersion\Run\8a6179254fb2f1e73fe707c1a92f1876 = "\"C:\\Users\\Admin\\AppData\\Roaming\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\8a6179254fb2f1e73fe707c1a92f1876 = "\"C:\\Users\\Admin\\AppData\\Roaming\\server.exe\" .."	server.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 21 IoCs

Processes:

server.exe

description	pid	process
Token: SeDebugPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe
Token: 33	768	server.exe
Token: SeIncBasePriorityPrivilege	768	server.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exeServer.exeserver.exe

description	pid	process	target process
PID 1032 wrote to memory of 1112	1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe	Server.exe
PID 1032 wrote to memory of 1112	1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe	Server.exe
PID 1032 wrote to memory of 1112	1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe	Server.exe
PID 1032 wrote to memory of 1112	1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe	Server.exe
PID 1032 wrote to memory of 560	1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe	Process Modules DLL.exe
PID 1032 wrote to memory of 560	1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe	Process Modules DLL.exe
PID 1032 wrote to memory of 560	1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe	Process Modules DLL.exe
PID 1032 wrote to memory of 560	1032	b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe	Process Modules DLL.exe
PID 1112 wrote to memory of 768	1112	Server.exe	server.exe
PID 1112 wrote to memory of 768	1112	Server.exe	server.exe
PID 1112 wrote to memory of 768	1112	Server.exe	server.exe
PID 1112 wrote to memory of 768	1112	Server.exe	server.exe
PID 768 wrote to memory of 1800	768	server.exe	netsh.exe
PID 768 wrote to memory of 1800	768	server.exe	netsh.exe
PID 768 wrote to memory of 1800	768	server.exe	netsh.exe
PID 768 wrote to memory of 1800	768	server.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe
"C:\Users\Admin\AppData\Local\Temp\b8b02e781ca3b049b61e31b5b3f508ac1ecffd335a6c6c83b7dbc1de88e69ed5.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1032

C:\Users\Admin\AppData\Local\Temp\Server.exe
"C:\Users\Admin\AppData\Local\Temp\Server.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1112

C:\Users\Admin\AppData\Roaming\server.exe
"C:\Users\Admin\AppData\Roaming\server.exe"
3⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:768

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\server.exe" "server.exe" ENABLE
4⤵
PID:1800

C:\Users\Admin\AppData\Local\Temp\Process Modules DLL.exe
"C:\Users\Admin\AppData\Local\Temp\Process Modules DLL.exe"
2⤵
- Executes dropped EXE
PID:560

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Process Modules DLL.exe
MD5
d27ba7e620a8c3a36b62d3a983d3fe61

SHA1
ac86faf6c358002254a032d4f7a9bdbef093c573

SHA256
3d793d0f14382c8f28ba9efd2f35bfb18c2abaf5f4654d81726ddebe4310fa07

SHA512
e0ef5dac3c50fe6bf1e03116dd7239d89c85d0a47bf2254705c1f4527b1b4843cc5b04ed76d5f618a61f127c6b54587e2e02f7050525d819f6aa3b93ede91a00

Download Submit
C:\Users\Admin\AppData\Local\Temp\Process Modules DLL.exe
MD5
d27ba7e620a8c3a36b62d3a983d3fe61

SHA1
ac86faf6c358002254a032d4f7a9bdbef093c573

SHA256
3d793d0f14382c8f28ba9efd2f35bfb18c2abaf5f4654d81726ddebe4310fa07

SHA512
e0ef5dac3c50fe6bf1e03116dd7239d89c85d0a47bf2254705c1f4527b1b4843cc5b04ed76d5f618a61f127c6b54587e2e02f7050525d819f6aa3b93ede91a00

Download Submit
C:\Users\Admin\AppData\Local\Temp\Server.exe
MD5
cd756c506aedc1507c79b7c81d51dfe0

SHA1
0428b30df265076b61499266050ecbb461b1ae95

SHA256
3a06815118520f21257729a0ef3a86159f927a9b0f598f442fc2b699b9a8adff

SHA512
9fde72774fd3deba541c69e37343a10e600f6bf4c5111b670397d4740d4d5405c7ba4b0436d12fc796c3662381ec62b226e6801685f5eff75cc7df069bd1f062

Download Submit
C:\Users\Admin\AppData\Local\Temp\Server.exe
MD5
cd756c506aedc1507c79b7c81d51dfe0

SHA1
0428b30df265076b61499266050ecbb461b1ae95

SHA256
3a06815118520f21257729a0ef3a86159f927a9b0f598f442fc2b699b9a8adff

SHA512
9fde72774fd3deba541c69e37343a10e600f6bf4c5111b670397d4740d4d5405c7ba4b0436d12fc796c3662381ec62b226e6801685f5eff75cc7df069bd1f062

Download Submit
C:\Users\Admin\AppData\Roaming\server.exe
MD5
cd756c506aedc1507c79b7c81d51dfe0

SHA1
0428b30df265076b61499266050ecbb461b1ae95

SHA256
3a06815118520f21257729a0ef3a86159f927a9b0f598f442fc2b699b9a8adff

SHA512
9fde72774fd3deba541c69e37343a10e600f6bf4c5111b670397d4740d4d5405c7ba4b0436d12fc796c3662381ec62b226e6801685f5eff75cc7df069bd1f062

Download Submit
C:\Users\Admin\AppData\Roaming\server.exe
MD5
cd756c506aedc1507c79b7c81d51dfe0

SHA1
0428b30df265076b61499266050ecbb461b1ae95

SHA256
3a06815118520f21257729a0ef3a86159f927a9b0f598f442fc2b699b9a8adff

SHA512
9fde72774fd3deba541c69e37343a10e600f6bf4c5111b670397d4740d4d5405c7ba4b0436d12fc796c3662381ec62b226e6801685f5eff75cc7df069bd1f062

Download Submit
\Users\Admin\AppData\Local\Temp\Process Modules DLL.exe
MD5
d27ba7e620a8c3a36b62d3a983d3fe61

SHA1
ac86faf6c358002254a032d4f7a9bdbef093c573

SHA256
3d793d0f14382c8f28ba9efd2f35bfb18c2abaf5f4654d81726ddebe4310fa07

SHA512
e0ef5dac3c50fe6bf1e03116dd7239d89c85d0a47bf2254705c1f4527b1b4843cc5b04ed76d5f618a61f127c6b54587e2e02f7050525d819f6aa3b93ede91a00

Download Submit
\Users\Admin\AppData\Local\Temp\Server.exe
MD5
cd756c506aedc1507c79b7c81d51dfe0

SHA1
0428b30df265076b61499266050ecbb461b1ae95

SHA256
3a06815118520f21257729a0ef3a86159f927a9b0f598f442fc2b699b9a8adff

SHA512
9fde72774fd3deba541c69e37343a10e600f6bf4c5111b670397d4740d4d5405c7ba4b0436d12fc796c3662381ec62b226e6801685f5eff75cc7df069bd1f062

Download Submit
\Users\Admin\AppData\Roaming\server.exe
MD5
cd756c506aedc1507c79b7c81d51dfe0

SHA1
0428b30df265076b61499266050ecbb461b1ae95

SHA256
3a06815118520f21257729a0ef3a86159f927a9b0f598f442fc2b699b9a8adff

SHA512
9fde72774fd3deba541c69e37343a10e600f6bf4c5111b670397d4740d4d5405c7ba4b0436d12fc796c3662381ec62b226e6801685f5eff75cc7df069bd1f062

Download Submit
memory/560-66-0x0000000000F40000-0x000000000103C000-memory.dmp

Filesize
1008KB

Download
memory/560-62-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

Filesize
9.9MB

Download
memory/560-73-0x0000000000C10000-0x0000000000C12000-memory.dmp

Filesize
8KB

Download
memory/768-72-0x0000000000C10000-0x0000000000C11000-memory.dmp

Filesize
4KB

Download
memory/768-71-0x0000000074AC0000-0x000000007506B000-memory.dmp

Filesize
5.7MB

Download
memory/1032-54-0x0000000076AE1000-0x0000000076AE3000-memory.dmp

Filesize
8KB

Download
memory/1112-64-0x0000000074AC0000-0x000000007506B000-memory.dmp

Filesize
5.7MB

Download
memory/1112-65-0x0000000074AC0000-0x000000007506B000-memory.dmp

Filesize
5.7MB

Download
memory/1112-63-0x00000000022B0000-0x00000000022B1000-memory.dmp

Filesize
4KB

Download