Malware Analysis Report

2025-04-13 12:36

Sample ID 240802-zrdfpsvdkf
Target flemme.exe
SHA256 5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e
Tags
rat default asyncrat discovery
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e

Threat Level: Known bad

The file flemme.exe was found to be: Known bad.

Malicious Activity Summary

rat default asyncrat discovery

Asyncrat family

Async RAT payload

AsyncRat

Async RAT payload

Checks computer location settings

Loads dropped DLL

Executes dropped EXE

Enumerates physical storage devices

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Delays execution with timeout.exe

Scheduled Task/Job: Scheduled Task

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-02 20:56

Signatures

Async RAT payload

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

Asyncrat family

asyncrat

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-02 20:56

Reported

2024-08-02 20:59

Platform

win7-20240704-en

Max time kernel

147s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\flemme.exe"

Signatures

AsyncRat

rat asyncrat

Async RAT payload

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\executorroblox.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\schtasks.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\timeout.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Roaming\executorroblox.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\flemme.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\executorroblox.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2816 wrote to memory of 2788 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2788 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2788 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2788 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2052 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2052 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2052 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 2816 wrote to memory of 2052 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 2788 wrote to memory of 2612 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2788 wrote to memory of 2612 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2788 wrote to memory of 2612 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2788 wrote to memory of 2612 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2052 wrote to memory of 2748 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2052 wrote to memory of 2748 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2052 wrote to memory of 2748 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2052 wrote to memory of 2748 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2052 wrote to memory of 2616 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\executorroblox.exe
PID 2052 wrote to memory of 2616 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\executorroblox.exe
PID 2052 wrote to memory of 2616 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\executorroblox.exe
PID 2052 wrote to memory of 2616 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\executorroblox.exe

Processes

C:\Users\Admin\AppData\Local\Temp\flemme.exe

"C:\Users\Admin\AppData\Local\Temp\flemme.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "executorroblox" /tr '"C:\Users\Admin\AppData\Roaming\executorroblox.exe"' & exit

C:\Windows\SysWOW64\cmd.exe

cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp710B.tmp.bat""

C:\Windows\SysWOW64\schtasks.exe

schtasks /create /f /sc onlogon /rl highest /tn "executorroblox" /tr '"C:\Users\Admin\AppData\Roaming\executorroblox.exe"'

C:\Windows\SysWOW64\timeout.exe

timeout 3

C:\Users\Admin\AppData\Roaming\executorroblox.exe

"C:\Users\Admin\AppData\Roaming\executorroblox.exe"

Network

Country Destination Domain Proto
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp

Files

memory/2816-0-0x0000000073CCE000-0x0000000073CCF000-memory.dmp

memory/2816-1-0x00000000003B0000-0x00000000003D2000-memory.dmp

memory/2816-2-0x0000000073CC0000-0x00000000743AE000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp710B.tmp.bat

MD5 ffc68f80770d3404c7354e157f160362
SHA1 6fe4d4591f1aed31971c0a89d6500fca8cc7d87d
SHA256 406f40e06ca26782a78088119142933ab9571e1cf99789346fda78d5eb857b66
SHA512 aedab85ebf204811a9184e028794c2d7d38c3c3d9a9a65e242c088b40aad265e4f54d32ae85188f2cb78d7f3e6f9dfcea43023be71d6befdcc489163a7639064

memory/2816-11-0x0000000073CC0000-0x00000000743AE000-memory.dmp

\Users\Admin\AppData\Roaming\executorroblox.exe

MD5 2dd4a3e79a430fcf80e0c16c059c4c2c
SHA1 b32b851bb2746acfa2035d6765f7827e5880debb
SHA256 5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e
SHA512 cae7ef83d8eb0f77d018dae6327b46cbb61e68623d64551492f883b9903a00ff410a9bda7c84f4348497e55b34490b315f855b95288e71710076cb246863a6a4

memory/2616-16-0x00000000000A0000-0x00000000000C2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-02 20:56

Reported

2024-08-02 20:59

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\flemme.exe"

Signatures

AsyncRat

rat asyncrat

Async RAT payload

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\flemme.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\executorroblox.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\flemme.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\schtasks.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\timeout.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Roaming\executorroblox.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\executorroblox.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1052 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 1052 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 1052 wrote to memory of 2020 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 1052 wrote to memory of 5048 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 1052 wrote to memory of 5048 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 1052 wrote to memory of 5048 N/A C:\Users\Admin\AppData\Local\Temp\flemme.exe C:\Windows\SysWOW64\cmd.exe
PID 2020 wrote to memory of 1716 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2020 wrote to memory of 1716 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2020 wrote to memory of 1716 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\schtasks.exe
PID 5048 wrote to memory of 2676 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 5048 wrote to memory of 2676 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 5048 wrote to memory of 2676 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 5048 wrote to memory of 432 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\executorroblox.exe
PID 5048 wrote to memory of 432 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\executorroblox.exe
PID 5048 wrote to memory of 432 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\executorroblox.exe

Processes

C:\Users\Admin\AppData\Local\Temp\flemme.exe

"C:\Users\Admin\AppData\Local\Temp\flemme.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "executorroblox" /tr '"C:\Users\Admin\AppData\Roaming\executorroblox.exe"' & exit

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC534.tmp.bat""

C:\Windows\SysWOW64\schtasks.exe

schtasks /create /f /sc onlogon /rl highest /tn "executorroblox" /tr '"C:\Users\Admin\AppData\Roaming\executorroblox.exe"'

C:\Windows\SysWOW64\timeout.exe

timeout 3

C:\Users\Admin\AppData\Roaming\executorroblox.exe

"C:\Users\Admin\AppData\Roaming\executorroblox.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp

Files

memory/1052-0-0x0000000074C1E000-0x0000000074C1F000-memory.dmp

memory/1052-1-0x0000000000600000-0x0000000000622000-memory.dmp

memory/1052-2-0x0000000074C10000-0x00000000753C0000-memory.dmp

memory/1052-3-0x0000000005060000-0x00000000050FC000-memory.dmp

memory/1052-8-0x0000000074C10000-0x00000000753C0000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpC534.tmp.bat

MD5 ef242ca31ef8f6d4a24a56411839b0e7
SHA1 86f787c0a86affe3c7440a94baa1ea0e1d3d8f9a
SHA256 5fc9c56981f3ce7be58dca13f1ea38bb2f9cb0d96c7d0a2daa83ca36ff19f7a5
SHA512 86f9796395661fa043a42cbc4bb557a651dd374f2cbc55c1f6cdb21181ec2b4789c94b8d1b5fe66ae014c5f7c368fb255670ae0d70feb6ac42f497a87f64c5fe

C:\Users\Admin\AppData\Roaming\executorroblox.exe

MD5 2dd4a3e79a430fcf80e0c16c059c4c2c
SHA1 b32b851bb2746acfa2035d6765f7827e5880debb
SHA256 5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e
SHA512 cae7ef83d8eb0f77d018dae6327b46cbb61e68623d64551492f883b9903a00ff410a9bda7c84f4348497e55b34490b315f855b95288e71710076cb246863a6a4

memory/432-13-0x0000000074B80000-0x0000000075330000-memory.dmp

memory/432-14-0x0000000074B80000-0x0000000075330000-memory.dmp

memory/432-15-0x0000000074B80000-0x0000000075330000-memory.dmp

memory/432-16-0x0000000074B80000-0x0000000075330000-memory.dmp