Malware Analysis Report

2025-06-16 06:21

Sample ID 231204-xpcehsee49
Target BCBP-FT-TRANSFER-287287912.scr.exe
SHA256 bbcd72e82d0511c6fda963e60a70d942e39e36e37ac225f75f3f5b9aa96b3e17
Tags
nanocore evasion keylogger persistence spyware stealer trojan
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

bbcd72e82d0511c6fda963e60a70d942e39e36e37ac225f75f3f5b9aa96b3e17

Threat Level: Known bad

The file BCBP-FT-TRANSFER-287287912.scr.exe was found to be: Known bad.

Malicious Activity Summary

nanocore evasion keylogger persistence spyware stealer trojan

NanoCore

Executes dropped EXE

Loads dropped DLL

Adds Run key to start application

Checks whether UAC is enabled

Suspicious use of SetThreadContext

Drops file in Program Files directory

Unsigned PE

Enumerates physical storage devices

Program crash

NSIS installer

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-04 19:01

Signatures

Unsigned PE

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

NSIS installer

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-04 19:01

Reported

2023-12-04 19:03

Platform

win7-20231130-en

Max time kernel

145s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe"

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2185821622-4133679102-1697169727-1000\Software\Microsoft\Windows\CurrentVersion\Run\pluuqyyiee = "C:\\Users\\Admin\\AppData\\Roaming\\ueeajjsoxxhdd\\miirbwwgp.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\gpaxjkfx.exe\" " C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\IMAP Subsystem = "C:\\Program Files (x86)\\IMAP Subsystem\\imapss.exe" C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2232 set thread context of 2216 N/A C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\IMAP Subsystem\imapss.exe C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe N/A
File opened for modification C:\Program Files (x86)\IMAP Subsystem\imapss.exe C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

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

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious behavior: MapViewOfSection

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

Suspicious use of AdjustPrivilegeToken

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

Processes

C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe

"C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe"

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.4.4:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.8.8:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.8.8:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.4.4:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.8.8:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.8.8:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.4.4:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.8.8:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.8.8:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.4.4:53 multipleentry90dayscontroller.homingbeacon.net udp
US 8.8.8.8:53 multipleentry90dayscontroller.homingbeacon.net udp

Files

\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe

MD5 dcb26c9bfc1b5d7ce5d51c3b87c37daa
SHA1 824e47ae0d2ef729977f162c019aba515575eabf
SHA256 cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d
SHA512 de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

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

MD5 dcb26c9bfc1b5d7ce5d51c3b87c37daa
SHA1 824e47ae0d2ef729977f162c019aba515575eabf
SHA256 cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d
SHA512 de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

memory/2232-6-0x0000000000400000-0x0000000000431000-memory.dmp

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

MD5 dcb26c9bfc1b5d7ce5d51c3b87c37daa
SHA1 824e47ae0d2ef729977f162c019aba515575eabf
SHA256 cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d
SHA512 de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

C:\Users\Admin\AppData\Local\Temp\xdxmt.s

MD5 f4aa88a2bdd058cf0f9263c8d9207102
SHA1 399a192bbac02ec52cfee904aa1ee2fad0369aad
SHA256 2bcb37bd3f65d6135c329e502c2ef0909572c3fa480947cc6fe23252d41cdf33
SHA512 9e3428b01280b92af142db29b9c9ca6ede2a210a8617190bbecaf7504c661f6cab66d10926dac49b9864417f9667a867109fd312f012f9a487388a622bde80de

\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe

MD5 dcb26c9bfc1b5d7ce5d51c3b87c37daa
SHA1 824e47ae0d2ef729977f162c019aba515575eabf
SHA256 cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d
SHA512 de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

memory/2216-11-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2216-15-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2232-14-0x0000000000400000-0x0000000000431000-memory.dmp

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

MD5 dcb26c9bfc1b5d7ce5d51c3b87c37daa
SHA1 824e47ae0d2ef729977f162c019aba515575eabf
SHA256 cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d
SHA512 de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

memory/2216-16-0x0000000000400000-0x000000000044A000-memory.dmp

memory/2216-17-0x0000000074280000-0x000000007482B000-memory.dmp

memory/2216-19-0x0000000074280000-0x000000007482B000-memory.dmp

memory/2216-20-0x0000000001CB0000-0x0000000001CF0000-memory.dmp

memory/2216-18-0x0000000001CB0000-0x0000000001CF0000-memory.dmp

C:\Program Files (x86)\IMAP Subsystem\imapss.exe

MD5 dcb26c9bfc1b5d7ce5d51c3b87c37daa
SHA1 824e47ae0d2ef729977f162c019aba515575eabf
SHA256 cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d
SHA512 de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

memory/2216-24-0x0000000074280000-0x000000007482B000-memory.dmp

memory/2216-25-0x0000000074280000-0x000000007482B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-04 19:01

Reported

2023-12-04 19:03

Platform

win10v2004-20231130-en

Max time kernel

125s

Max time network

50s

Command Line

"C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe"

Signatures

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1791582586-1997866593-3795608343-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\pluuqyyiee = "C:\\Users\\Admin\\AppData\\Roaming\\ueeajjsoxxhdd\\miirbwwgp.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\gpaxjkfx.exe\" " C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe N/A

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\gpaxjkfx.exe

Processes

C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe

"C:\Users\Admin\AppData\Local\Temp\BCBP-FT-TRANSFER-287287912.scr.exe"

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

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

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4600 -ip 4600

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4600 -s 652

Network

Files

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

MD5 dcb26c9bfc1b5d7ce5d51c3b87c37daa
SHA1 824e47ae0d2ef729977f162c019aba515575eabf
SHA256 cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d
SHA512 de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

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

MD5 dcb26c9bfc1b5d7ce5d51c3b87c37daa
SHA1 824e47ae0d2ef729977f162c019aba515575eabf
SHA256 cb9f656521d692c898a9a5439682241d82087d40f3a949639b595f3fe2da106d
SHA512 de22705d5410b7d4c24fdcfc32a87280f16ced3aa7eee860cdc8855d763916e3dab4ac01190444f51f3f67a7bde4451be0b9d9dd23922fcd983c0cde8515ac35

memory/4600-5-0x0000000000400000-0x0000000000431000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\xdxmt.s

MD5 f4aa88a2bdd058cf0f9263c8d9207102
SHA1 399a192bbac02ec52cfee904aa1ee2fad0369aad
SHA256 2bcb37bd3f65d6135c329e502c2ef0909572c3fa480947cc6fe23252d41cdf33
SHA512 9e3428b01280b92af142db29b9c9ca6ede2a210a8617190bbecaf7504c661f6cab66d10926dac49b9864417f9667a867109fd312f012f9a487388a622bde80de