njrat | 5ca60c222235db8fcffbd475e7ed5a8d477e7ad251c30c289de58f743750f2e3

Analysis

max time kernel
152s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
30-12-2023 22:17

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General

Target

1e39c64ba850b0298ab04b9e9c2f69fc.exe
Size

402KB
MD5

1e39c64ba850b0298ab04b9e9c2f69fc
SHA1

1e5f7671e54aa8597ffb3af7fb13e2d0aeaee318
SHA256

5ca60c222235db8fcffbd475e7ed5a8d477e7ad251c30c289de58f743750f2e3
SHA512

e849cd145f019820b188868c04b3b01bf0f072695350b6fc69025831a68c368979ae7a5756f72a13f7903305dbe1df6fac6f993c63921ff6c32b541580a989b8
SSDEEP

6144:zmaKVBGmE84IMNv55giU0pKiFYHxfx15RvOagakZBxkTN2gmeGcFnVQb/DAYbDgl:oSmLAuEY71fviagATFmebVQDcYc5

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
3040	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 created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5cd8f17f4086744065eb0992a09e05a2.exe	Trojan.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5cd8f17f4086744065eb0992a09e05a2.exe	Trojan.exe

Executes dropped EXE 2 IoCs

pid	Process
3688	test.exe
2248	Trojan.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3424-0-0x0000000000400000-0x00000000004FB000-memory.dmp	upx
behavioral2/memory/3424-22-0x0000000000400000-0x00000000004FB000-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
4944	3424	WerFault.exe	88
2612	3424	WerFault.exe	88

Suspicious behavior: EnumeratesProcesses 55 IoCs

pid	Process
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe
2248	Trojan.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2248	Trojan.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3424 wrote to memory of 4676	3424	1e39c64ba850b0298ab04b9e9c2f69fc.exe	96
PID 3424 wrote to memory of 4676	3424	1e39c64ba850b0298ab04b9e9c2f69fc.exe	96
PID 3424 wrote to memory of 4676	3424	1e39c64ba850b0298ab04b9e9c2f69fc.exe	96
PID 4676 wrote to memory of 3688	4676	cmd.exe	97
PID 4676 wrote to memory of 3688	4676	cmd.exe	97
PID 4676 wrote to memory of 3688	4676	cmd.exe	97
PID 3688 wrote to memory of 2248	3688	test.exe	102
PID 3688 wrote to memory of 2248	3688	test.exe	102
PID 3688 wrote to memory of 2248	3688	test.exe	102
PID 2248 wrote to memory of 3040	2248	Trojan.exe	98
PID 2248 wrote to memory of 3040	2248	Trojan.exe	98
PID 2248 wrote to memory of 3040	2248	Trojan.exe	98

C:\Users\Admin\AppData\Local\Temp\1e39c64ba850b0298ab04b9e9c2f69fc.exe
"C:\Users\Admin\AppData\Local\Temp\1e39c64ba850b0298ab04b9e9c2f69fc.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3424
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3424 -s 240
  2⤵
  - Program crash
  PID:4944
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c test.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4676
- - C:\Users\Admin\AppData\Local\Temp\test.exe
    test.exe
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:3688
  - - 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:2248
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3424 -s 164
  2⤵
  - Program crash
  PID:2612

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3424 -ip 3424
1⤵
PID:2484

C:\Windows\SysWOW64\netsh.exe
netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\Trojan.exe" "Trojan.exe" ENABLE
1⤵
- Modifies Windows Firewall
PID:3040

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3424 -ip 3424
1⤵
PID:4184

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\Trojan.exe

Filesize
68KB

MD5
657473de097114583ea97fc3df887639

SHA1
5994425d0bf4d69dcf5ee43f8014ddc7ec611bfd

SHA256
ad3bc3688e0693c553f57980434dd829c9c8a39923b32771c0834db545774387

SHA512
9658d35aa5e7b8df84ac3cd03f7331ddf3e4bb5ff8ec9815916a1b8ec3c6fc7e128d920b69b708604525ff04fd12432bf0971b3e44976468d89813753da6143f

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

Filesize
78KB

MD5
42c5854aa0709d8bf6c28ea82c67b9a5

SHA1
124ea473f0572009de85a4a46f361109f4fae7d6

SHA256
71e1add662041fee9ff0ddf0139154cf006538559af45f34047aac91efb1b8eb

SHA512
c0f4412f2237138b5b66ecc285d7f44bacd67ae23feb0a55561cd4f7850ee6b0fd1b1dac3d2725ed4932aaf155b0fbda284a69b07594789bdb4cbcf0f499d95a

Download Submit
memory/2248-24-0x00000000011F0000-0x0000000001200000-memory.dmp

Filesize
64KB

Download
memory/2248-25-0x00000000011F0000-0x0000000001200000-memory.dmp

Filesize
64KB

Download
memory/2248-29-0x00000000011F0000-0x0000000001200000-memory.dmp

Filesize
64KB

Download
memory/2248-28-0x00000000011F0000-0x0000000001200000-memory.dmp

Filesize
64KB

Download
memory/2248-27-0x00000000011F0000-0x0000000001200000-memory.dmp

Filesize
64KB

Download
memory/2248-20-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/2248-19-0x00000000011F0000-0x0000000001200000-memory.dmp

Filesize
64KB

Download
memory/2248-17-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/2248-26-0x00000000011F0000-0x0000000001200000-memory.dmp

Filesize
64KB

Download
memory/2248-23-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/3424-0-0x0000000000400000-0x00000000004FB000-memory.dmp

Filesize
1004KB

Download
memory/3424-22-0x0000000000400000-0x00000000004FB000-memory.dmp

Filesize
1004KB

Download
memory/3688-7-0x0000000001110000-0x0000000001120000-memory.dmp

Filesize
64KB

Download
memory/3688-18-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/3688-5-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download
memory/3688-6-0x0000000074DA0000-0x0000000075351000-memory.dmp

Filesize
5.7MB

Download