njrat | bff236cb3c2cbc2e5c9feaa5bdd967fd07b9047cbb73b70b63e07c334049d8a3

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7-20220331-en
submitted
05/04/2022, 04:33

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
b57e79ab29ef870fe17d27375e65bce0.exe
Size 488KB
Sample220405-e6hzhshcg3
SHA256 bff236cb3c2cbc2e5c9feaa5bdd967fd07b9047cbb73b70b63e07c334049d8a3
MD5 b57e79ab29ef870fe17d27375e65bce0
SHA1 7fbe0980a02621774cbb83dddb667ffa47d1d803
SHA512 2ebc857736c25742e5b080840d94a9e374f27b038e1721dce883b4e857291c5f4cdeb34b2229235741dac566344f885f8319c91b9b080df1c7d27e80864f8f5e
MD5 SHA1 SHA512

Score

10^/10

njrat filmzzzz evasion trojan

Malware Config

Extracted

Family

njrat

Version

0.7.3

Botnet

filmzzzz

film.royalprop.trade:8109

Mutex

Client.exe

Attributes

reg_key
Client.exe
splitter
0987

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	b57e79ab29ef870fe17d27375e65bce0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	b57e79ab29ef870fe17d27375e65bce0.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	b57e79ab29ef870fe17d27375e65bce0.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	b57e79ab29ef870fe17d27375e65bce0.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1628 set thread context of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
360	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1628	b57e79ab29ef870fe17d27375e65bce0.exe

Suspicious use of AdjustPrivilegeToken 14 IoCs

description	pid	Process
Token: SeDebugPrivilege	1628	b57e79ab29ef870fe17d27375e65bce0.exe
Token: SeDebugPrivilege	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: 33	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: SeIncBasePriorityPrivilege	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: 33	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: SeIncBasePriorityPrivilege	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: 33	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: SeIncBasePriorityPrivilege	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: 33	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: SeIncBasePriorityPrivilege	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: 33	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: SeIncBasePriorityPrivilege	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: 33	468	b57e79ab29ef870fe17d27375e65bce0.exe
Token: SeIncBasePriorityPrivilege	468	b57e79ab29ef870fe17d27375e65bce0.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 360	1628	b57e79ab29ef870fe17d27375e65bce0.exe	29
PID 1628 wrote to memory of 360	1628	b57e79ab29ef870fe17d27375e65bce0.exe	29
PID 1628 wrote to memory of 360	1628	b57e79ab29ef870fe17d27375e65bce0.exe	29
PID 1628 wrote to memory of 360	1628	b57e79ab29ef870fe17d27375e65bce0.exe	29
PID 1628 wrote to memory of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31
PID 1628 wrote to memory of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31
PID 1628 wrote to memory of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31
PID 1628 wrote to memory of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31
PID 1628 wrote to memory of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31
PID 1628 wrote to memory of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31
PID 1628 wrote to memory of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31
PID 1628 wrote to memory of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31
PID 1628 wrote to memory of 468	1628	b57e79ab29ef870fe17d27375e65bce0.exe	31

C:\Users\Admin\AppData\Local\Temp\b57e79ab29ef870fe17d27375e65bce0.exe
"C:\Users\Admin\AppData\Local\Temp\b57e79ab29ef870fe17d27375e65bce0.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TndBQUn" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCBA9.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:360
- C:\Users\Admin\AppData\Local\Temp\b57e79ab29ef870fe17d27375e65bce0.exe
  "{path}"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:468

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

tmpCBA9.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpCBA9.tmp
Size 1KB
SHA256 14b3bed66900ffacf8bd00fcfa3c2bae9e75f72f5da8ecd1812c6b96b79fe519
MD5 657c8140ef8f18bb824de9c4e6f80ffa
SHA1 748177ab408cb1b40c110263ea54872ddcc7e3a3
SHA512 965e759d2c67d81ae8f366f05d777a8a29c80a1053cb9bbbbfe3d53652e6fa455ebc796e2ade992cac68bd2e0cc2843ed961cc2cc324bb8c34dc878ab5a2d8b6
MD5 SHA1 SHA512

Submit Download

memory/468-64-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/468-60-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/468-61-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/468-63-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/468-65-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/468-70-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/468-68-0x0000000000400000-0x000000000041A000-memory.dmp

Download

memory/1628-57-0x0000000001DE0000-0x0000000001DFA000-memory.dmp

Download

memory/1628-56-0x0000000004850000-0x00000000048BC000-memory.dmp

Download

memory/1628-55-0x0000000000400000-0x000000000040A000-memory.dmp

Download

memory/1628-54-0x0000000000050000-0x00000000000D0000-memory.dmp

Download