njrat | 201b4922c6b82b4ac3498a8570ba1875982cc4cbbc5699882910748800dc15ed

Analysis

max time kernel
149s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
06-02-2023 07:18

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General

Target

HEUR-Trojan.MSIL.Generic-201b4922c6b82b4ac349.exe
Size

78KB
MD5

f7aa7d4c186cb3982667ea9b7559ddf3
SHA1

446466aedae6546584978e3343cd0fe9823add95
SHA256

201b4922c6b82b4ac3498a8570ba1875982cc4cbbc5699882910748800dc15ed
SHA512

267dbe00e4d5cb9b3013e1eb354ed618b612a3692d337b01aab5ee527648aa865a30f6932f7650b34fba363b9ea2be1d09f121bc125510c961e5448aabd55705
SSDEEP

1536:H2SoJu8s5x2EgcQ4Pxcscy4MwJLGVls6URSmYWf2lyyN:WVAF/d3xc3M4kIAekN

Score

10^/10

njrat evasion persistence trojan

Malware Config

Signatures

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

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
2420	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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	HEUR-Trojan.MSIL.Generic-201b4922c6b82b4ac349.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\6b20a595bb8be04e551cd155478861a5.exe	System interrupts.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\6b20a595bb8be04e551cd155478861a5.exe	System interrupts.exe

Executes dropped EXE 1 IoCs

pid	Process
2092	System interrupts.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\6b20a595bb8be04e551cd155478861a5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\System interrupts.exe\" .."	System interrupts.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\6b20a595bb8be04e551cd155478861a5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\System interrupts.exe\" .."	System interrupts.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeDebugPrivilege	2092	System interrupts.exe
Token: 33	2092	System interrupts.exe
Token: SeIncBasePriorityPrivilege	2092	System interrupts.exe
Token: 33	2092	System interrupts.exe
Token: SeIncBasePriorityPrivilege	2092	System interrupts.exe
Token: 33	2092	System interrupts.exe
Token: SeIncBasePriorityPrivilege	2092	System interrupts.exe
Token: 33	2092	System interrupts.exe
Token: SeIncBasePriorityPrivilege	2092	System interrupts.exe
Token: 33	2092	System interrupts.exe
Token: SeIncBasePriorityPrivilege	2092	System interrupts.exe
Token: 33	2092	System interrupts.exe
Token: SeIncBasePriorityPrivilege	2092	System interrupts.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3868 wrote to memory of 2092	3868	HEUR-Trojan.MSIL.Generic-201b4922c6b82b4ac349.exe	88
PID 3868 wrote to memory of 2092	3868	HEUR-Trojan.MSIL.Generic-201b4922c6b82b4ac349.exe	88
PID 2092 wrote to memory of 2420	2092	System interrupts.exe	89
PID 2092 wrote to memory of 2420	2092	System interrupts.exe	89

C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan.MSIL.Generic-201b4922c6b82b4ac349.exe
"C:\Users\Admin\AppData\Local\Temp\HEUR-Trojan.MSIL.Generic-201b4922c6b82b4ac349.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3868
- C:\Users\Admin\AppData\Local\Temp\System interrupts.exe
  "C:\Users\Admin\AppData\Local\Temp\System interrupts.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2092
- - C:\Windows\SYSTEM32\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\System interrupts.exe" "System interrupts.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:2420

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\System interrupts.exe

Filesize
78KB

MD5
f7aa7d4c186cb3982667ea9b7559ddf3

SHA1
446466aedae6546584978e3343cd0fe9823add95

SHA256
201b4922c6b82b4ac3498a8570ba1875982cc4cbbc5699882910748800dc15ed

SHA512
267dbe00e4d5cb9b3013e1eb354ed618b612a3692d337b01aab5ee527648aa865a30f6932f7650b34fba363b9ea2be1d09f121bc125510c961e5448aabd55705

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

Filesize
78KB

MD5
f7aa7d4c186cb3982667ea9b7559ddf3

SHA1
446466aedae6546584978e3343cd0fe9823add95

SHA256
201b4922c6b82b4ac3498a8570ba1875982cc4cbbc5699882910748800dc15ed

SHA512
267dbe00e4d5cb9b3013e1eb354ed618b612a3692d337b01aab5ee527648aa865a30f6932f7650b34fba363b9ea2be1d09f121bc125510c961e5448aabd55705

Download Submit
memory/2092-133-0x0000000000000000-mapping.dmp

Download
memory/2092-136-0x000000001BF50000-0x000000001C986000-memory.dmp

Filesize
10.2MB

Download
memory/2420-137-0x0000000000000000-mapping.dmp

Download
memory/3868-132-0x000000001B1C0000-0x000000001BBF6000-memory.dmp

Filesize
10.2MB

Download