njrat | 1a8cd081624acf2e77c9851f2e223e6542971749abecc20029d290ffd40fccde

Analysis

max time kernel
150s
max time network
148s
platform
windows7_x64
resource
win7-en-20211104
submitted
06-11-2021 13:36

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General

Target

1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe
Size

162KB
MD5

46aafec84dd26ba8e4676b91e7a33b1c
SHA1

7b0041322232fb0776c7fec31914049e0f980427
SHA256

1a8cd081624acf2e77c9851f2e223e6542971749abecc20029d290ffd40fccde
SHA512

c136b4745ce1febc97d691a4b0261412cda6a64e0110989bb37938af77cbdd84eb92ac239af29e11172566c6b759cc35bde43845b5f52209f73baeda14a754c6

Score

10^/10

njrat evasion persistence trojan

Malware Config

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
Executes dropped EXE 2 IoCs

Processes:

Y9cA8bTK55jM6Vs2u1ah.exeinternet.exe

pid process

1472 Y9cA8bTK55jM6Vs2u1ah.exe
1004 internet.exe
Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031

pid	process
1472	Y9cA8bTK55jM6Vs2u1ah.exe
1004	internet.exe

Drops startup file 2 IoCs

Processes:

internet.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1b5816ba242f2863f6da2fff3128272c.exe	internet.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\1b5816ba242f2863f6da2fff3128272c.exe	internet.exe

Loads dropped DLL 4 IoCs

Processes:

1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exeY9cA8bTK55jM6Vs2u1ah.exe

pid	process
744	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe
744	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe
1472	Y9cA8bTK55jM6Vs2u1ah.exe
1472	Y9cA8bTK55jM6Vs2u1ah.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

internet.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-103686315-404690609-2047157615-1000\Software\Microsoft\Windows\CurrentVersion\Run\1b5816ba242f2863f6da2fff3128272c = "\"C:\\Users\\Admin\\AppData\\Roaming\\internet.exe\" .."	internet.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\1b5816ba242f2863f6da2fff3128272c = "\"C:\\Users\\Admin\\AppData\\Roaming\\internet.exe\" .."	internet.exe

Drops file in Windows directory 2 IoCs

Processes:

1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe

description	ioc	process
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.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 34 IoCs

Processes:

1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exeinternet.exe

description	pid	process
Token: SeDebugPrivilege	744	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe
Token: 33	744	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe
Token: SeIncBasePriorityPrivilege	744	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe
Token: SeDebugPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe
Token: 33	1004	internet.exe
Token: SeIncBasePriorityPrivilege	1004	internet.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exeY9cA8bTK55jM6Vs2u1ah.exeinternet.exe

description	pid	process	target process
PID 744 wrote to memory of 1472	744	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe	Y9cA8bTK55jM6Vs2u1ah.exe
PID 744 wrote to memory of 1472	744	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe	Y9cA8bTK55jM6Vs2u1ah.exe
PID 744 wrote to memory of 1472	744	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe	Y9cA8bTK55jM6Vs2u1ah.exe
PID 744 wrote to memory of 1472	744	1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe	Y9cA8bTK55jM6Vs2u1ah.exe
PID 1472 wrote to memory of 1004	1472	Y9cA8bTK55jM6Vs2u1ah.exe	internet.exe
PID 1472 wrote to memory of 1004	1472	Y9cA8bTK55jM6Vs2u1ah.exe	internet.exe
PID 1472 wrote to memory of 1004	1472	Y9cA8bTK55jM6Vs2u1ah.exe	internet.exe
PID 1472 wrote to memory of 1004	1472	Y9cA8bTK55jM6Vs2u1ah.exe	internet.exe
PID 1004 wrote to memory of 1196	1004	internet.exe	netsh.exe
PID 1004 wrote to memory of 1196	1004	internet.exe	netsh.exe
PID 1004 wrote to memory of 1196	1004	internet.exe	netsh.exe
PID 1004 wrote to memory of 1196	1004	internet.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe
"C:\Users\Admin\AppData\Local\Temp\1A8CD081624ACF2E77C9851F2E223E6542971749ABECC.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:744

C:\Users\Admin\AppData\Roaming\Y9cA8bTK55jM6Vs2u1ah.exe
"C:\Users\Admin\AppData\Roaming\Y9cA8bTK55jM6Vs2u1ah.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1472

C:\Users\Admin\AppData\Roaming\internet.exe
"C:\Users\Admin\AppData\Roaming\internet.exe"
3⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1004

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\internet.exe" "internet.exe" ENABLE
4⤵
PID:1196

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\Roaming\Y9cA8bTK55jM6Vs2u1ah.exe
MD5
43095f8e16dcbb0edc3135fb938e7f97

SHA1
dfbe3d053c76582e4f8bc4376da2fe366f0eea04

SHA256
414959b916a5536e997ccc5c762fd7fadaad4a3447ce56a0e1ed26fa797e7169

SHA512
1f74296ce3da87ab08f1581e698f39c772e1da5d89def5f5b429e4d8cdce03b8fb3354c7f79870bb728e6bfe23cce34a7f11c3b7401bf46f376914d6ccf9e515

Download Submit
C:\Users\Admin\AppData\Roaming\Y9cA8bTK55jM6Vs2u1ah.exe
MD5
43095f8e16dcbb0edc3135fb938e7f97

SHA1
dfbe3d053c76582e4f8bc4376da2fe366f0eea04

SHA256
414959b916a5536e997ccc5c762fd7fadaad4a3447ce56a0e1ed26fa797e7169

SHA512
1f74296ce3da87ab08f1581e698f39c772e1da5d89def5f5b429e4d8cdce03b8fb3354c7f79870bb728e6bfe23cce34a7f11c3b7401bf46f376914d6ccf9e515

Download Submit
C:\Users\Admin\AppData\Roaming\internet.exe
MD5
43095f8e16dcbb0edc3135fb938e7f97

SHA1
dfbe3d053c76582e4f8bc4376da2fe366f0eea04

SHA256
414959b916a5536e997ccc5c762fd7fadaad4a3447ce56a0e1ed26fa797e7169

SHA512
1f74296ce3da87ab08f1581e698f39c772e1da5d89def5f5b429e4d8cdce03b8fb3354c7f79870bb728e6bfe23cce34a7f11c3b7401bf46f376914d6ccf9e515

Download Submit
C:\Users\Admin\AppData\Roaming\internet.exe
MD5
43095f8e16dcbb0edc3135fb938e7f97

SHA1
dfbe3d053c76582e4f8bc4376da2fe366f0eea04

SHA256
414959b916a5536e997ccc5c762fd7fadaad4a3447ce56a0e1ed26fa797e7169

SHA512
1f74296ce3da87ab08f1581e698f39c772e1da5d89def5f5b429e4d8cdce03b8fb3354c7f79870bb728e6bfe23cce34a7f11c3b7401bf46f376914d6ccf9e515

Download Submit
C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch
MD5
d9fa34a408b0271bbde549e6be6226a0

SHA1
fbe59c4051e3707b9f33a9251f410678d2ef0fbb

SHA256
db9d4e5b496d7c2bb869af17952d51d66f04d01aa05fc185a31a7cba2bd9413c

SHA512
36405d93bc152515f83dec16df1a65c94db48efc41638ecf166dd5eeb6792f8a795f075efd310377902033f0da07a1409cb4553a927f820d0b3860ffb6006f85

Download Submit
C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch
MD5
d9fa34a408b0271bbde549e6be6226a0

SHA1
fbe59c4051e3707b9f33a9251f410678d2ef0fbb

SHA256
db9d4e5b496d7c2bb869af17952d51d66f04d01aa05fc185a31a7cba2bd9413c

SHA512
36405d93bc152515f83dec16df1a65c94db48efc41638ecf166dd5eeb6792f8a795f075efd310377902033f0da07a1409cb4553a927f820d0b3860ffb6006f85

Download Submit
\Users\Admin\AppData\Roaming\Y9cA8bTK55jM6Vs2u1ah.exe
MD5
43095f8e16dcbb0edc3135fb938e7f97

SHA1
dfbe3d053c76582e4f8bc4376da2fe366f0eea04

SHA256
414959b916a5536e997ccc5c762fd7fadaad4a3447ce56a0e1ed26fa797e7169

SHA512
1f74296ce3da87ab08f1581e698f39c772e1da5d89def5f5b429e4d8cdce03b8fb3354c7f79870bb728e6bfe23cce34a7f11c3b7401bf46f376914d6ccf9e515

Download Submit
\Users\Admin\AppData\Roaming\Y9cA8bTK55jM6Vs2u1ah.exe
MD5
43095f8e16dcbb0edc3135fb938e7f97

SHA1
dfbe3d053c76582e4f8bc4376da2fe366f0eea04

SHA256
414959b916a5536e997ccc5c762fd7fadaad4a3447ce56a0e1ed26fa797e7169

SHA512
1f74296ce3da87ab08f1581e698f39c772e1da5d89def5f5b429e4d8cdce03b8fb3354c7f79870bb728e6bfe23cce34a7f11c3b7401bf46f376914d6ccf9e515

Download Submit
\Users\Admin\AppData\Roaming\internet.exe
MD5
43095f8e16dcbb0edc3135fb938e7f97

SHA1
dfbe3d053c76582e4f8bc4376da2fe366f0eea04

SHA256
414959b916a5536e997ccc5c762fd7fadaad4a3447ce56a0e1ed26fa797e7169

SHA512
1f74296ce3da87ab08f1581e698f39c772e1da5d89def5f5b429e4d8cdce03b8fb3354c7f79870bb728e6bfe23cce34a7f11c3b7401bf46f376914d6ccf9e515

Download Submit
\Users\Admin\AppData\Roaming\internet.exe
MD5
43095f8e16dcbb0edc3135fb938e7f97

SHA1
dfbe3d053c76582e4f8bc4376da2fe366f0eea04

SHA256
414959b916a5536e997ccc5c762fd7fadaad4a3447ce56a0e1ed26fa797e7169

SHA512
1f74296ce3da87ab08f1581e698f39c772e1da5d89def5f5b429e4d8cdce03b8fb3354c7f79870bb728e6bfe23cce34a7f11c3b7401bf46f376914d6ccf9e515

Download Submit
memory/744-55-0x0000000076A21000-0x0000000076A23000-memory.dmp

Filesize
8KB

Download
memory/744-56-0x0000000000D40000-0x0000000000D41000-memory.dmp

Filesize
4KB

Download
memory/1004-66-0x0000000000000000-mapping.dmp

Download
memory/1004-72-0x0000000000320000-0x0000000000321000-memory.dmp

Filesize
4KB

Download
memory/1196-73-0x0000000000000000-mapping.dmp

Download
memory/1472-63-0x0000000002250000-0x0000000002251000-memory.dmp

Filesize
4KB

Download
memory/1472-59-0x0000000000000000-mapping.dmp

Download