njrat | 8906e1ecddea0365056df3736940fbf03c5efb66bf593b5e04f847de80ac4619

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
24-12-2023 20:29

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General

Target

1104d39f197f3a8cfe9a52f7d15917f2.exe
Size

402KB
MD5

1104d39f197f3a8cfe9a52f7d15917f2
SHA1

314939176cd3e71c92faca3057c28c9b27674b4e
SHA256

8906e1ecddea0365056df3736940fbf03c5efb66bf593b5e04f847de80ac4619
SHA512

ae9b2b233c1a5eb5d32d0cbe3c8c9df49a801dcb1188ea4f4fd056ba8fa755f45bfe71a3e5225618b0bea4a04e2ba6ccae03b15aa317254e2f83fa0bb26bb190
SSDEEP

6144:7maKVBGmE84IMNv55giU0pKiFYHxfx15RvOagakZBxkTN2gmeGcFnVQb/DAYbDgU:ASmLAuEY71fviagATFmebVQDcYcg

Score

10^/10

njrat pdf evasion persistence trojan upx

Malware Config

Extracted

Family

njrat

Version

0.6.4

Botnet

pdf

hhhmach.ddns.net:1177

Mutex

5cd8f17f4086744065eb0992a09e05a2

Attributes

reg_key
5cd8f17f4086744065eb0992a09e05a2
splitter
|'|'|

Signatures

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

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
1652	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-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	test.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5cd8f17f4086744065eb0992a09e05a2.exe	Trojan.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5cd8f17f4086744065eb0992a09e05a2.exe	Trojan.exe

Executes dropped EXE 2 IoCs

pid	Process
1056	test.exe
2184	Trojan.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4468-0-0x0000000000400000-0x00000000004FB000-memory.dmp	upx
behavioral2/memory/4468-22-0x0000000000400000-0x00000000004FB000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\5cd8f17f4086744065eb0992a09e05a2 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Trojan.exe\" .."	Trojan.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\5cd8f17f4086744065eb0992a09e05a2 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Trojan.exe\" .."	Trojan.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
5072	4468	WerFault.exe	87
1008	4468	WerFault.exe	87

Suspicious behavior: EnumeratesProcesses 52 IoCs

pid	Process
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe
2184	Trojan.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2184	Trojan.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4468 wrote to memory of 3212	4468	1104d39f197f3a8cfe9a52f7d15917f2.exe	95
PID 4468 wrote to memory of 3212	4468	1104d39f197f3a8cfe9a52f7d15917f2.exe	95
PID 4468 wrote to memory of 3212	4468	1104d39f197f3a8cfe9a52f7d15917f2.exe	95
PID 3212 wrote to memory of 1056	3212	cmd.exe	96
PID 3212 wrote to memory of 1056	3212	cmd.exe	96
PID 3212 wrote to memory of 1056	3212	cmd.exe	96
PID 1056 wrote to memory of 2184	1056	test.exe	97
PID 1056 wrote to memory of 2184	1056	test.exe	97
PID 1056 wrote to memory of 2184	1056	test.exe	97
PID 2184 wrote to memory of 1652	2184	Trojan.exe	98
PID 2184 wrote to memory of 1652	2184	Trojan.exe	98
PID 2184 wrote to memory of 1652	2184	Trojan.exe	98

C:\Users\Admin\AppData\Local\Temp\1104d39f197f3a8cfe9a52f7d15917f2.exe
"C:\Users\Admin\AppData\Local\Temp\1104d39f197f3a8cfe9a52f7d15917f2.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4468
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4468 -s 196
  2⤵
  - Program crash
  PID:5072
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c test.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3212
- - C:\Users\Admin\AppData\Local\Temp\test.exe
    test.exe
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:1056
  - - C:\Users\Admin\AppData\Local\Temp\Trojan.exe
      "C:\Users\Admin\AppData\Local\Temp\Trojan.exe"
      4⤵
      Drops startup file
      Executes dropped EXE
      Adds Run key to start application
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2184
    - - C:\Windows\SysWOW64\netsh.exe
        
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Trojan.exe" "Trojan.exe" ENABLE
        5⤵
        Modifies Windows Firewall
        
        PID:1652
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4468 -s 164
  2⤵
  - Program crash
  PID:1008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4468 -ip 4468
1⤵
PID:4924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4468 -ip 4468
1⤵
PID:2260

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\test.exe

Filesize
78KB

MD5
42c5854aa0709d8bf6c28ea82c67b9a5

SHA1
124ea473f0572009de85a4a46f361109f4fae7d6

SHA256
71e1add662041fee9ff0ddf0139154cf006538559af45f34047aac91efb1b8eb

SHA512
c0f4412f2237138b5b66ecc285d7f44bacd67ae23feb0a55561cd4f7850ee6b0fd1b1dac3d2725ed4932aaf155b0fbda284a69b07594789bdb4cbcf0f499d95a

Download Submit
memory/1056-18-0x0000000074B10000-0x00000000750C1000-memory.dmp

Filesize
5.7MB

Download
memory/1056-5-0x0000000074B10000-0x00000000750C1000-memory.dmp

Filesize
5.7MB

Download
memory/1056-6-0x0000000074B10000-0x00000000750C1000-memory.dmp

Filesize
5.7MB

Download
memory/1056-7-0x00000000014B0000-0x00000000014C0000-memory.dmp

Filesize
64KB

Download
memory/2184-20-0x0000000074B10000-0x00000000750C1000-memory.dmp

Filesize
5.7MB

Download
memory/2184-17-0x0000000074B10000-0x00000000750C1000-memory.dmp

Filesize
5.7MB

Download
memory/2184-19-0x0000000000C00000-0x0000000000C10000-memory.dmp

Filesize
64KB

Download
memory/2184-23-0x0000000074B10000-0x00000000750C1000-memory.dmp

Filesize
5.7MB

Download
memory/2184-24-0x0000000000C00000-0x0000000000C10000-memory.dmp

Filesize
64KB

Download
memory/2184-25-0x0000000000C00000-0x0000000000C10000-memory.dmp

Filesize
64KB

Download
memory/2184-26-0x0000000000C00000-0x0000000000C10000-memory.dmp

Filesize
64KB

Download
memory/2184-27-0x0000000000C00000-0x0000000000C10000-memory.dmp

Filesize
64KB

Download
memory/2184-28-0x0000000000C00000-0x0000000000C10000-memory.dmp

Filesize
64KB

Download
memory/2184-29-0x0000000000C00000-0x0000000000C10000-memory.dmp

Filesize
64KB

Download
memory/2184-30-0x0000000000C00000-0x0000000000C10000-memory.dmp

Filesize
64KB

Download
memory/4468-0-0x0000000000400000-0x00000000004FB000-memory.dmp

Filesize
1004KB

Download
memory/4468-22-0x0000000000400000-0x00000000004FB000-memory.dmp

Filesize
1004KB

Download