Malware Analysis Report

2025-08-06 02:53

Sample ID 240215-hnmfrsbh34
Target AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe
SHA256 05e0f79a1c435ee4d5f914b576b8d9c4a766895aad1da9186ac5a49cc98b3657
Tags
remcos persistence rat
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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

05e0f79a1c435ee4d5f914b576b8d9c4a766895aad1da9186ac5a49cc98b3657

Threat Level: Known bad

The file AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe was found to be: Known bad.

Malicious Activity Summary

remcos persistence rat

Remcos

Loads dropped DLL

Adds Run key to start application

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Drops file in System32 directory

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in Windows directory

Program crash

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-02-15 06:53

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-02-15 06:53

Reported

2024-02-15 06:55

Platform

win7-20231215-en

Max time kernel

150s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe"

Signatures

Remcos

rat remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1268429524-3929314613-1992311491-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\concentus = "C:\\Users\\Admin\\AppData\\Local\\Temp\\vkstregningerne\\Euphuists.exe" C:\Program Files (x86)\windows mail\wab.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\jumpsuit.lnk C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2044 set thread context of 696 N/A C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe C:\Program Files (x86)\windows mail\wab.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Voksaftryk.Unw244 C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A
File opened for modification C:\Windows\resources\0409\Halvlangt.lre C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe

"C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe"

C:\Program Files (x86)\windows mail\wab.exe

"C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe"

Network

Country Destination Domain Proto
VN 103.183.115.241:80 103.183.115.241 tcp

Files

\Users\Admin\AppData\Local\Temp\nso646F.tmp\System.dll

MD5 cff85c549d536f651d4fb8387f1976f2
SHA1 d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e
SHA256 8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
SHA512 531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

memory/2044-24-0x0000000077040000-0x00000000771E9000-memory.dmp

memory/2044-25-0x0000000077230000-0x0000000077306000-memory.dmp

memory/2044-26-0x0000000074700000-0x0000000074707000-memory.dmp

memory/696-27-0x0000000077040000-0x00000000771E9000-memory.dmp

memory/696-28-0x0000000077266000-0x0000000077267000-memory.dmp

memory/696-29-0x0000000077230000-0x0000000077306000-memory.dmp

memory/696-33-0x0000000077230000-0x0000000077306000-memory.dmp

memory/696-34-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-35-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-31-0x0000000001340000-0x0000000006DFA000-memory.dmp

memory/696-36-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-37-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-38-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-39-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-40-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-41-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-42-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-43-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-44-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-45-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-53-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-54-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-52-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-51-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-50-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-49-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-48-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-47-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-46-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-58-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-60-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-61-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-62-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-63-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-64-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-65-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-66-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-67-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-68-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-70-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-71-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-72-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-73-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-74-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-75-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-76-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-77-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-78-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-79-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-80-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-81-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-82-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-83-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-84-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-87-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-86-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-85-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-88-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-89-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-90-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-92-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-94-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-93-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-91-0x00000000002D0000-0x0000000001332000-memory.dmp

memory/696-95-0x00000000002D0000-0x0000000001332000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-02-15 06:53

Reported

2024-02-15 06:55

Platform

win10v2004-20231215-en

Max time kernel

36s

Max time network

57s

Command Line

"C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe"

Signatures

Remcos

rat remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\concentus = "C:\\Users\\Admin\\AppData\\Local\\Temp\\vkstregningerne\\Euphuists.exe" C:\Program Files (x86)\windows mail\wab.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\jumpsuit.lnk C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3852 set thread context of 872 N/A C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe C:\Program Files (x86)\windows mail\wab.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\0409\Halvlangt.lre C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A
File opened for modification C:\Windows\Voksaftryk.Unw244 C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe

"C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe"

C:\Program Files (x86)\windows mail\wab.exe

"C:\Users\Admin\AppData\Local\Temp\AKBANK 002'den oluşturulan fatura ödemesiMerkantiliserendes.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
VN 103.183.115.241:80 103.183.115.241 tcp
US 8.8.8.8:53 241.115.183.103.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsq54A9.tmp\System.dll

MD5 cff85c549d536f651d4fb8387f1976f2
SHA1 d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e
SHA256 8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8
SHA512 531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

memory/3852-23-0x00000000779E1000-0x0000000077B01000-memory.dmp

memory/3852-24-0x0000000074630000-0x0000000074637000-memory.dmp

memory/872-25-0x0000000077A68000-0x0000000077A69000-memory.dmp

memory/872-26-0x00000000779E1000-0x0000000077B01000-memory.dmp

memory/872-28-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-30-0x00000000779E1000-0x0000000077B01000-memory.dmp

memory/872-31-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-32-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-29-0x0000000001E60000-0x000000000791A000-memory.dmp

memory/872-33-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-34-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-35-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-36-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-37-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-38-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-39-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-40-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-41-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-42-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-43-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-44-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-45-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-46-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-47-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-48-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-49-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-50-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-51-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-52-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-53-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-54-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-55-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-56-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-57-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-58-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-59-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-60-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-61-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-64-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-65-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-66-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-67-0x0000000000C00000-0x0000000001E54000-memory.dmp

memory/872-68-0x0000000000C00000-0x0000000001E54000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-02-15 06:53

Reported

2024-02-15 06:55

Platform

win7-20231129-en

Max time kernel

117s

Max time network

117s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2964 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-02-15 06:53

Reported

2024-02-15 06:55

Platform

win10v2004-20231222-en

Max time kernel

90s

Max time network

148s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 904 wrote to memory of 1012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 904 wrote to memory of 1012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 904 wrote to memory of 1012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1012 -ip 1012

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1012 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp

Files

N/A