Analysis
- max time kernel
150s - max time network
152s - platform
windows7_x64 - resource
win7v20201028 - submitted
02/01/2021, 02:50
General
- Target zrr4Nw19.exe
- Size 28KB
- Sample210102-d6xyjrefbe
- SHA256 7e31b3a603afe3a04745f35987db0d90e2643676b920df2185e11ae06ad32a4f
Score
10/10
Malware Config
Extracted
Family
-
njrat
Version
-
0.7d
Botnet
-
FKA
Mutex
-
15ea4944f270282d46a1f0dd4d332e8f
Attributes
-
reg_key
15ea4944f270282d46a1f0dd4d332e8f
-
splitter
|'|'|
Signatures
- njRAT/Bladabindi
Widely used RAT written in .NET.
- Executes dropped EXE 1 IoCs
- Modifies Windows Firewall 1 TTPs
- Drops startup file 2 IoCs
- Loads dropped DLL 1 IoCs
- Adds Run key to start application 2 TTPs 2 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious use of AdjustPrivilegeToken 30 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\zrr4Nw19.exe"C:\Users\Admin\AppData\Local\Temp\zrr4Nw19.exe"1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Executes dropped EXE
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\netsh.exenetsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\svchost.exe" "svchost.exe" ENABLE3⤵
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1612-9-0x00000000745C0000-0x0000000074CAE000-memory.dmp
memory/1612-10-0x0000000000030000-0x0000000000031000-memory.dmp
memory/1640-2-0x00000000745C0000-0x0000000074CAE000-memory.dmp
memory/1640-3-0x00000000002A0000-0x00000000002A1000-memory.dmp