njrat | 79e3ec6c521fd939a66b44cd02e87772412cf065f8a247a0da5856df54b3efed

General

Target

4ab8fe1e78032e7e21bfc7f9ffb4dac1.exe
Size

402KB
MD5

4ab8fe1e78032e7e21bfc7f9ffb4dac1
SHA1

81234a22190d834c6959d3e4164f2d359ebce34e
SHA256

79e3ec6c521fd939a66b44cd02e87772412cf065f8a247a0da5856df54b3efed
SHA512

8ce68c92f29d26d1b85dbbc9b2690c7f04e4193683c5aeee89976e7a44254a235f9ad2c0531e4bb9a575334b08eaf9312cfb4ecb2b7b3061d7636cb2513c197b
SSDEEP

6144:hmaKVBGmE84IMNv55giU0pKiFYHxfx15RvOagakZBxkTN2gmeGcFnVQb/DAYbDgU:mSmLAuEY71fviagATFmebVQDcYcg

Score

10^/10

njrat pdf evasion persistence trojan upx

Malware Config

Extracted

Family

njrat

Version

0.6.4

Botnet

pdf

C2

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
1952	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-1-5-21-3803511929-1339359695-2191195476-1000\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
560	test.exe
2272	Trojan.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1840-0-0x0000000000400000-0x00000000004FB000-memory.dmp	upx
behavioral2/memory/1840-22-0x0000000000400000-0x00000000004FB000-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-1-5-21-3803511929-1339359695-2191195476-1000\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
2028	1840	WerFault.exe	12
548	1840	WerFault.exe	12

Suspicious behavior: EnumeratesProcesses 48 IoCs

pid	Process
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe
2272	Trojan.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2272	Trojan.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1840 wrote to memory of 4364	1840	4ab8fe1e78032e7e21bfc7f9ffb4dac1.exe	25
PID 1840 wrote to memory of 4364	1840	4ab8fe1e78032e7e21bfc7f9ffb4dac1.exe	25
PID 1840 wrote to memory of 4364	1840	4ab8fe1e78032e7e21bfc7f9ffb4dac1.exe	25
PID 4364 wrote to memory of 560	4364	cmd.exe	24
PID 4364 wrote to memory of 560	4364	cmd.exe	24
PID 4364 wrote to memory of 560	4364	cmd.exe	24
PID 560 wrote to memory of 2272	560	test.exe	34
PID 560 wrote to memory of 2272	560	test.exe	34
PID 560 wrote to memory of 2272	560	test.exe	34
PID 2272 wrote to memory of 1952	2272	Trojan.exe	32
PID 2272 wrote to memory of 1952	2272	Trojan.exe	32
PID 2272 wrote to memory of 1952	2272	Trojan.exe	32

C:\Users\Admin\AppData\Local\Temp\4ab8fe1e78032e7e21bfc7f9ffb4dac1.exe
"C:\Users\Admin\AppData\Local\Temp\4ab8fe1e78032e7e21bfc7f9ffb4dac1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1840
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1840 -s 240
  2⤵
  - Program crash
  PID:2028
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c test.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4364
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1840 -s 164
  2⤵
  - Program crash
  PID:548

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 196 -p 1840 -ip 1840
1⤵
PID:1208

C:\Users\Admin\AppData\Local\Temp\test.exe
test.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:560
- C:\Users\Admin\AppData\Local\Temp\Trojan.exe
  "C:\Users\Admin\AppData\Local\Temp\Trojan.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2272

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:1952

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1840 -ip 1840
1⤵
PID:976

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

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

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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/560-5-0x00000000745B0000-0x0000000074B61000-memory.dmp

Filesize
5.7MB

Download
memory/560-6-0x0000000000D30000-0x0000000000D40000-memory.dmp

Filesize
64KB

Download
memory/560-7-0x00000000745B0000-0x0000000074B61000-memory.dmp

Filesize
5.7MB

Download
memory/560-17-0x00000000745B0000-0x0000000074B61000-memory.dmp

Filesize
5.7MB

Download
memory/1840-0-0x0000000000400000-0x00000000004FB000-memory.dmp

Filesize
1004KB

Download
memory/1840-22-0x0000000000400000-0x00000000004FB000-memory.dmp

Filesize
1004KB

Download
memory/2272-19-0x0000000000E90000-0x0000000000EA0000-memory.dmp

Filesize
64KB

Download
memory/2272-20-0x00000000745B0000-0x0000000074B61000-memory.dmp

Filesize
5.7MB

Download
memory/2272-18-0x00000000745B0000-0x0000000074B61000-memory.dmp

Filesize
5.7MB

Download
memory/2272-23-0x00000000745B0000-0x0000000074B61000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads