njrat | dfd1bee3ed292173e7227059431ec28a4bb3f66eb21bc4553737d71715282669

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
26-12-2022 18:48

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General

Target

Server.exe
Size

806KB
MD5

c0db2c222008fee946d5b2ba4fb157b2
SHA1

d239a776d1a56423950b05a8dfa48baad49b4806
SHA256

dfd1bee3ed292173e7227059431ec28a4bb3f66eb21bc4553737d71715282669
SHA512

b6c7c9652b62db2fe92e810b71c88a463bd9a59adb4f58980a03ca57e1209f5cd94df278cfc54882ac718b7be0abbc338cc0cfec38c2874e107f37a99c6d4430
SSDEEP

12288:8Jy90Zzik406D2jedlhjpRftS7ibdoQzzIVlFFpmub4IjpRbQMbP6kz3:Oyoin06D2adrjpRocoQHIVjZNFQMbnT

Score

10^/10

njrat pr0xed evasion persistence trojan

Malware Config

Extracted

Family

njrat

Version

0.7d

Botnet

Pr0xed

FRANSESCOzcuNzcuFRANSESCOjFRANSESCO5LjIzOQStrikStrik:NDI0MjA=

Mutex

30d8b46abd9407809a9e0bb4c05a740d

Attributes

reg_key
30d8b46abd9407809a9e0bb4c05a740d
splitter
|'|'|

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
2432	certutil.exe
2476	server.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
4932	netsh.exe

Drops startup file 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Corporation.exe	server.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Google.exe.exe	server.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Google.exe.exe	server.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce	Server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	Server.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Google.exe.exe	server.exe
File opened for modification	C:\Windows\SysWOW64\Google.exe.exe	server.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Google.exe.exe	server.exe
File opened for modification	C:\Program Files (x86)\Google.exe.exe	server.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2476	server.exe

Suspicious use of AdjustPrivilegeToken 37 IoCs

description	pid	Process
Token: SeDebugPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe
Token: 33	2476	server.exe
Token: SeIncBasePriorityPrivilege	2476	server.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4320 wrote to memory of 2432	4320	Server.exe	82
PID 4320 wrote to memory of 2432	4320	Server.exe	82
PID 4320 wrote to memory of 2476	4320	Server.exe	84
PID 4320 wrote to memory of 2476	4320	Server.exe	84
PID 4320 wrote to memory of 2476	4320	Server.exe	84
PID 2476 wrote to memory of 4932	2476	server.exe	85
PID 2476 wrote to memory of 4932	2476	server.exe	85
PID 2476 wrote to memory of 4932	2476	server.exe	85

C:\Users\Admin\AppData\Local\Temp\Server.exe
"C:\Users\Admin\AppData\Local\Temp\Server.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4320
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\certutil.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\certutil.exe -decode Server.txt server.exe
  2⤵
  - Executes dropped EXE
  PID:2432
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\server.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\server.exe
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2476
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\server.exe" "server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:4932

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\Server.txt

Filesize
127KB

MD5
579895661055541b4ae1475641b088ae

SHA1
97bf7f9e0e3927991ba82e5a6bf1a997c57245ef

SHA256
0e16eac31e4255b5ea78f45dcb3ba1c5c26b309a180e98d4bf65d418a7d859a5

SHA512
700e0f9ad6dcf505bfa36c2ef6ce86251da021251a9515f947589eec1c164bc4493c619005aece81fc02a58f5e3b3183a2613441afcfac953c84a7dfe5d92299

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\certutil.exe

Filesize
1.6MB

MD5
e376b07aa887a6085ceae9be62ac9c37

SHA1
0545039e26171b2cdbe6039723b41676e2d3f796

SHA256
48922bb6498c432dd248cd337f4dcee0bfe77ee3ecbb1f8020d6db1f135e8e00

SHA512
c302584db2ab2593baad9cf52315f2d31407714db659ba1b2743512fe95faadf8325363a2bee2623caf5136c0f4697298f9feed8244ac439958a755121102152

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\server.exe

Filesize
93KB

MD5
69686b88086881484710cfd02aeea412

SHA1
4b970e642a5778d3d2b1d5dcf6afecd8b5a753a7

SHA256
8349e0f5c041462dac6c31045356fbe90842bdbeeea5823b8c32c3c9a9e9003a

SHA512
3a9748e1eede226ed8dde30809425df80a7cf82291937c80d82307cf1b456b545cd94d301d526b2508af2db91d59ddeca028640a740e5e2ce2eaddf20566c628

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\server.exe

Filesize
93KB

MD5
69686b88086881484710cfd02aeea412

SHA1
4b970e642a5778d3d2b1d5dcf6afecd8b5a753a7

SHA256
8349e0f5c041462dac6c31045356fbe90842bdbeeea5823b8c32c3c9a9e9003a

SHA512
3a9748e1eede226ed8dde30809425df80a7cf82291937c80d82307cf1b456b545cd94d301d526b2508af2db91d59ddeca028640a740e5e2ce2eaddf20566c628

Download Submit
memory/2476-138-0x0000000075340000-0x00000000758F1000-memory.dmp

Filesize
5.7MB

Download
memory/2476-140-0x0000000075340000-0x00000000758F1000-memory.dmp

Filesize
5.7MB

Download