njrat | e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079

Analysis

max time kernel
151s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
20/10/2022, 19:22

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General

Target

e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079.exe
Size

83KB
MD5

75d03a98794e91667ed93ae48a471190
SHA1

bbe74d03aab61f27e1bed2a92977c512f4f257e4
SHA256

e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079
SHA512

14b04cb8dd486aeca81ca06b730c1746edfa9eaf91b86938556bfb1237f2a51a68c4145a5cd4f4e3d0563aaf5bbc87df9363e4f6f8fd7ae98478efe8dff3752e
SSDEEP

1536:YJVPB0Vv8qG8A1D0U5DPnRoRP5/crancT6YgjYDUJKGYE6hCQ1X5:YJoUqGrD9dnRop5/Z+6Y2tYE6hV

Score

10^/10

njrat evasion persistence trojan

Malware Config

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
3632	server.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
2664	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	e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079.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\bbc1bd7b29526a656974b77826e72f30 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\bbc1bd7b29526a656974b77826e72f30 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\server.exe\" .."	server.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 19 IoCs

description	pid	Process
Token: SeDebugPrivilege	3632	server.exe
Token: 33	3632	server.exe
Token: SeIncBasePriorityPrivilege	3632	server.exe
Token: 33	3632	server.exe
Token: SeIncBasePriorityPrivilege	3632	server.exe
Token: 33	3632	server.exe
Token: SeIncBasePriorityPrivilege	3632	server.exe
Token: 33	3632	server.exe
Token: SeIncBasePriorityPrivilege	3632	server.exe
Token: 33	3632	server.exe
Token: SeIncBasePriorityPrivilege	3632	server.exe
Token: 33	3632	server.exe
Token: SeIncBasePriorityPrivilege	3632	server.exe
Token: 33	3632	server.exe
Token: SeIncBasePriorityPrivilege	3632	server.exe
Token: 33	3632	server.exe
Token: SeIncBasePriorityPrivilege	3632	server.exe
Token: 33	3632	server.exe
Token: SeIncBasePriorityPrivilege	3632	server.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4844 wrote to memory of 3632	4844	e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079.exe	89
PID 4844 wrote to memory of 3632	4844	e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079.exe	89
PID 4844 wrote to memory of 3632	4844	e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079.exe	89
PID 3632 wrote to memory of 2664	3632	server.exe	90
PID 3632 wrote to memory of 2664	3632	server.exe	90
PID 3632 wrote to memory of 2664	3632	server.exe	90

C:\Users\Admin\AppData\Local\Temp\e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079.exe
"C:\Users\Admin\AppData\Local\Temp\e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4844
- C:\Users\Admin\AppData\Local\Temp\server.exe
  "C:\Users\Admin\AppData\Local\Temp\server.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3632
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\server.exe" "server.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:2664

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\server.exe

Filesize
83KB

MD5
75d03a98794e91667ed93ae48a471190

SHA1
bbe74d03aab61f27e1bed2a92977c512f4f257e4

SHA256
e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079

SHA512
14b04cb8dd486aeca81ca06b730c1746edfa9eaf91b86938556bfb1237f2a51a68c4145a5cd4f4e3d0563aaf5bbc87df9363e4f6f8fd7ae98478efe8dff3752e

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

Filesize
83KB

MD5
75d03a98794e91667ed93ae48a471190

SHA1
bbe74d03aab61f27e1bed2a92977c512f4f257e4

SHA256
e3c00f1e5dcb8e1f9b66014c4010cd316f07cf16505caf54cd5149fbdb99f079

SHA512
14b04cb8dd486aeca81ca06b730c1746edfa9eaf91b86938556bfb1237f2a51a68c4145a5cd4f4e3d0563aaf5bbc87df9363e4f6f8fd7ae98478efe8dff3752e

Download Submit
memory/3632-139-0x0000000005260000-0x00000000052F2000-memory.dmp

Filesize
584KB

Download
memory/3632-140-0x00000000051F0000-0x00000000051FA000-memory.dmp

Filesize
40KB

Download
memory/4844-132-0x00000000003B0000-0x00000000003CC000-memory.dmp

Filesize
112KB

Download
memory/4844-133-0x0000000004DF0000-0x0000000004E8C000-memory.dmp

Filesize
624KB

Download
memory/4844-134-0x0000000005720000-0x0000000005CC4000-memory.dmp

Filesize
5.6MB

Download