Malware Analysis Report

2025-08-05 16:22

Sample ID 231023-v9kkhsdd85
Target NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
SHA256 9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504fe
Tags
formbook k0p2 rat spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504fe

Threat Level: Known bad

The file NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe was found to be: Known bad.

Malicious Activity Summary

formbook k0p2 rat spyware stealer trojan

Formbook

Formbook payload

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-10-23 17:41

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-10-23 17:41

Reported

2023-10-23 17:50

Platform

win7-20231023-en

Max time kernel

118s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe"

Signatures

Formbook

trojan spyware stealer formbook

Formbook payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 812 wrote to memory of 2632 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2632 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2632 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2632 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 812 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe

Processes

C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe

"C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe"

C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe

"C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe"

C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe

"C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe"

Network

N/A

Files

memory/812-0-0x00000000002C0000-0x0000000000356000-memory.dmp

memory/812-1-0x0000000073ED0000-0x00000000745BE000-memory.dmp

memory/812-2-0x00000000049F0000-0x0000000004A30000-memory.dmp

memory/812-3-0x0000000000470000-0x0000000000488000-memory.dmp

memory/812-4-0x0000000073ED0000-0x00000000745BE000-memory.dmp

memory/812-5-0x00000000049F0000-0x0000000004A30000-memory.dmp

memory/812-6-0x0000000000450000-0x0000000000460000-memory.dmp

memory/812-7-0x0000000004E10000-0x0000000004E7E000-memory.dmp

memory/2512-8-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2512-10-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2512-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2512-14-0x0000000000400000-0x000000000042F000-memory.dmp

memory/812-15-0x0000000073ED0000-0x00000000745BE000-memory.dmp

memory/2512-16-0x0000000000910000-0x0000000000C13000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-10-23 17:41

Reported

2023-10-23 17:48

Platform

win10v2004-20231020-en

Max time kernel

143s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe"

Signatures

Formbook

trojan spyware stealer formbook

Formbook payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4260 wrote to memory of 1404 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 4260 wrote to memory of 1404 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 4260 wrote to memory of 1404 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 4260 wrote to memory of 1404 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 4260 wrote to memory of 1404 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe
PID 4260 wrote to memory of 1404 N/A C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe

Processes

C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe

"C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe"

C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe

"C:\Users\Admin\AppData\Local\Temp\NEAS.9d507d3f7b58d898ff10eb7443b6feb32ea2ea6972d3ceafa67e2e0a1d0504feexe_JC.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 254.5.248.8.in-addr.arpa udp
US 8.8.8.8:53 29.81.57.23.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 126.179.238.8.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 112.208.253.8.in-addr.arpa udp
US 8.8.8.8:53 169.117.168.52.in-addr.arpa udp

Files

memory/4260-0-0x0000000000E70000-0x0000000000F06000-memory.dmp

memory/4260-1-0x0000000074580000-0x0000000074D30000-memory.dmp

memory/4260-2-0x0000000005DC0000-0x0000000006364000-memory.dmp

memory/4260-3-0x00000000058F0000-0x0000000005982000-memory.dmp

memory/4260-4-0x0000000005A40000-0x0000000005A50000-memory.dmp

memory/4260-5-0x00000000059A0000-0x00000000059AA000-memory.dmp

memory/4260-6-0x0000000005BE0000-0x0000000005C7C000-memory.dmp

memory/4260-7-0x0000000005C80000-0x0000000005C98000-memory.dmp

memory/4260-8-0x0000000074580000-0x0000000074D30000-memory.dmp

memory/4260-9-0x0000000005A40000-0x0000000005A50000-memory.dmp

memory/4260-10-0x0000000005CA0000-0x0000000005CB0000-memory.dmp

memory/4260-11-0x0000000007230000-0x000000000729E000-memory.dmp

memory/1404-12-0x0000000000400000-0x000000000042F000-memory.dmp

memory/4260-14-0x0000000074580000-0x0000000074D30000-memory.dmp

memory/1404-15-0x0000000001690000-0x00000000019DA000-memory.dmp