njrat | 8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12

General

Target

8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12.exe
Size

46KB
MD5

a3451c553c2cd51a449a1c23cddd2a60
SHA1

a105fe251bb6c32bd7e3121684c229cfc53b7fd8
SHA256

8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12
SHA512

d626f28fb9f350c1c1933948c27d5e88029c50f01017dd9a24761decc3b97291b7f13ab2a7eaa50b8a4f8aa347727e112deb2c7e74d57da51b755dd7cbf79a40
SSDEEP

768:u0cg8Y7OA5aYKMokqBNe2uMmVyRYC6rjTmcavw91EhFRN//n7SqVcL:u0cgH6A5VGNEMmojkqPh97vcL

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

pid	Process
5084	system.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
1476	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dac29fe045952483ae266670ff871095.exe	system.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dac29fe045952483ae266670ff871095.exe	system.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dac29fe045952483ae266670ff871095 = "\"C:\\Windows\\system.exe\" .."	system.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dac29fe045952483ae266670ff871095 = "\"C:\\Windows\\system.exe\" .."	system.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\security.config.cch.new	8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12.exe
File created	C:\Windows\Microsoft.NET\Framework64\v2.0.50727\config\enterprisesec.config.cch.new	8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12.exe
File created	C:\Windows\system.exe	8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12.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 33 IoCs

description	pid	Process
Token: SeDebugPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe
Token: 33	5084	system.exe
Token: SeIncBasePriorityPrivilege	5084	system.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 5084	2420	8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12.exe	82
PID 2420 wrote to memory of 5084	2420	8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12.exe	82
PID 5084 wrote to memory of 1476	5084	system.exe	83
PID 5084 wrote to memory of 1476	5084	system.exe	83

C:\Users\Admin\AppData\Local\Temp\8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12.exe
"C:\Users\Admin\AppData\Local\Temp\8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Windows\system.exe
  "C:\Windows\system.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5084
- - C:\Windows\SYSTEM32\netsh.exe
    netsh firewall add allowedprogram "C:\Windows\system.exe" "system.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:1476

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\system.exe

Filesize
46KB

MD5
a3451c553c2cd51a449a1c23cddd2a60

SHA1
a105fe251bb6c32bd7e3121684c229cfc53b7fd8

SHA256
8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12

SHA512
d626f28fb9f350c1c1933948c27d5e88029c50f01017dd9a24761decc3b97291b7f13ab2a7eaa50b8a4f8aa347727e112deb2c7e74d57da51b755dd7cbf79a40

Download Submit
C:\Windows\system.exe

Filesize
46KB

MD5
a3451c553c2cd51a449a1c23cddd2a60

SHA1
a105fe251bb6c32bd7e3121684c229cfc53b7fd8

SHA256
8c252c367dfc56c2fc7253c8548239c85b540957d92c281db9deb9bf33418e12

SHA512
d626f28fb9f350c1c1933948c27d5e88029c50f01017dd9a24761decc3b97291b7f13ab2a7eaa50b8a4f8aa347727e112deb2c7e74d57da51b755dd7cbf79a40

Download Submit
memory/2420-132-0x00007FFBDA120000-0x00007FFBDAB56000-memory.dmp

Filesize
10.2MB

Download
memory/5084-136-0x00007FFBDA120000-0x00007FFBDAB56000-memory.dmp

Filesize
10.2MB

Download

Analysis

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