Malware Analysis Report

2024-10-23 17:07

Sample ID 240331-tcp83aeh65
Target 57ca391bdad17bf09e724a84f970c0fc_JaffaCakes118
SHA256 e982c63be9c5eb7defc0ddbf72d27a5e6ea2fe2c050777595a831470ca9aa31e
Tags
xloader b2c0 loader 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

e982c63be9c5eb7defc0ddbf72d27a5e6ea2fe2c050777595a831470ca9aa31e

Threat Level: Known bad

The file 57ca391bdad17bf09e724a84f970c0fc_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

xloader b2c0 loader rat

Xloader

Xloader payload

Deletes itself

Loads dropped DLL

Suspicious use of SetThreadContext

Program crash

Enumerates physical storage devices

Unsigned PE

NSIS installer

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Suspicious use of UnmapMainImage

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-31 15:54

Signatures

Unsigned PE

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

2024-03-31 15:54

Reported

2024-03-31 15:57

Platform

win7-20240221-en

Max time kernel

147s

Max time network

127s

Command Line

C:\Windows\Explorer.EXE

Signatures

Xloader

loader xloader

Xloader payload

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

Deletes itself

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

Loads dropped DLL

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2868 set thread context of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
PID 2532 set thread context of 1196 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Windows\Explorer.EXE
PID 2988 set thread context of 1196 N/A C:\Windows\SysWOW64\help.exe C:\Windows\Explorer.EXE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\help.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2868 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
PID 2868 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
PID 2868 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
PID 2868 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
PID 2868 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
PID 2868 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
PID 2868 wrote to memory of 2532 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
PID 1196 wrote to memory of 2988 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\help.exe
PID 1196 wrote to memory of 2988 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\help.exe
PID 1196 wrote to memory of 2988 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\help.exe
PID 1196 wrote to memory of 2988 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\help.exe
PID 2988 wrote to memory of 2504 N/A C:\Windows\SysWOW64\help.exe C:\Windows\SysWOW64\cmd.exe
PID 2988 wrote to memory of 2504 N/A C:\Windows\SysWOW64\help.exe C:\Windows\SysWOW64\cmd.exe
PID 2988 wrote to memory of 2504 N/A C:\Windows\SysWOW64\help.exe C:\Windows\SysWOW64\cmd.exe
PID 2988 wrote to memory of 2504 N/A C:\Windows\SysWOW64\help.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe

"C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"

C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe

"C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"

C:\Windows\SysWOW64\help.exe

"C:\Windows\SysWOW64\help.exe"

C:\Windows\SysWOW64\cmd.exe

/c del "C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsy6633.tmp\gyalquzbu.dll

MD5 a8caa6d267951ad22e835233b5e50c46
SHA1 45c722c5958d99727a95d30eaa3032203d1f4ab2
SHA256 db7b70b0734285b8d9a1f3617e55603b0cb649d9bf0b7fbf8988c44e684f4e76
SHA512 9ee74bf576554210f8923dda8aa28f6dc7f3c5aa52da7b48a94beaf56cb4e27f1c3d0387cc9116e467631bc13c0e743341129bffa84b9db16ace1248a53b4cd7

memory/2532-8-0x0000000000400000-0x0000000000429000-memory.dmp

memory/2532-9-0x0000000000950000-0x0000000000C53000-memory.dmp

memory/2532-12-0x0000000000400000-0x0000000000429000-memory.dmp

memory/1196-11-0x0000000003890000-0x0000000003990000-memory.dmp

memory/2532-13-0x00000000003D0000-0x00000000003E1000-memory.dmp

memory/1196-14-0x0000000007170000-0x00000000072AD000-memory.dmp

memory/2988-18-0x0000000000950000-0x0000000000956000-memory.dmp

memory/2988-15-0x0000000000950000-0x0000000000956000-memory.dmp

memory/2988-19-0x0000000000080000-0x00000000000A9000-memory.dmp

memory/2988-20-0x0000000000960000-0x0000000000C63000-memory.dmp

memory/2988-21-0x0000000000080000-0x00000000000A9000-memory.dmp

memory/2988-23-0x0000000000350000-0x00000000003E0000-memory.dmp

memory/1196-25-0x0000000007170000-0x00000000072AD000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-31 15:54

Reported

2024-03-31 15:57

Platform

win10v2004-20240226-en

Max time kernel

151s

Max time network

156s

Command Line

C:\Windows\Explorer.EXE

Signatures

Xloader

loader xloader

Xloader payload

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

Loads dropped DLL

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4280 set thread context of 1096 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe
PID 1096 set thread context of 3380 N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe C:\Windows\Explorer.EXE
PID 4340 set thread context of 3380 N/A C:\Windows\SysWOW64\cmstp.exe C:\Windows\Explorer.EXE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A
N/A N/A C:\Windows\SysWOW64\cmstp.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\cmstp.exe N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A C:\Windows\Explorer.EXE N/A

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe

"C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"

C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe

"C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"

C:\Windows\SysWOW64\cmstp.exe

"C:\Windows\SysWOW64\cmstp.exe"

C:\Windows\SysWOW64\cmd.exe

/c del "C:\Users\Admin\AppData\Local\Temp\Unpaid invoice.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 9.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.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
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 www.anadolu.academy udp
US 8.8.8.8:53 www.arroundworld.com udp
US 8.8.8.8:53 www.newstodayupdate.com udp
IN 46.28.45.69:80 www.newstodayupdate.com tcp
US 8.8.8.8:53 69.45.28.46.in-addr.arpa udp
US 8.8.8.8:53 www.philme.net udp
US 8.8.8.8:53 www.visionmark.net udp
US 8.8.8.8:53 218.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 www.bjmobi.com udp
US 8.8.8.8:53 www.sunshinefamilysupport.com udp
US 8.8.8.8:53 www.roleconstructora.com udp
US 8.8.8.8:53 www.khomayphotocopy.club udp
US 8.8.8.8:53 www.andrewfjohnston.com udp
US 208.91.197.27:80 www.andrewfjohnston.com tcp
US 8.8.8.8:53 27.197.91.208.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 66.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 www.chinaopedia.com udp
HK 156.245.88.8:80 www.chinaopedia.com tcp
US 8.8.8.8:53 8.88.245.156.in-addr.arpa udp
US 8.8.8.8:53 www.thesewhitevvalls.com udp
US 8.8.8.8:53 www.bedrijfs-kledingshop.com udp
NL 37.97.254.27:80 www.bedrijfs-kledingshop.com tcp
US 8.8.8.8:53 27.254.97.37.in-addr.arpa udp
US 8.8.8.8:53 www.andajzx.com udp
US 8.8.8.8:53 www.unasolucioendesa.com udp
US 45.60.13.133:80 www.unasolucioendesa.com tcp
US 8.8.8.8:53 133.13.60.45.in-addr.arpa udp
US 8.8.8.8:53 www.starsspell.com udp
US 8.8.8.8:53 www.bjmobi.com udp
US 8.8.8.8:53 www.hsvfingerprinting.com udp
US 162.144.181.154:80 www.hsvfingerprinting.com tcp
US 8.8.8.8:53 154.181.144.162.in-addr.arpa udp
IN 46.28.45.69:80 www.newstodayupdate.com tcp
US 8.8.8.8:53 14.173.189.20.in-addr.arpa udp
US 8.8.8.8:53 www.metalworkingadditives.online udp

Files

C:\Users\Admin\AppData\Local\Temp\nsu77D1.tmp\gyalquzbu.dll

MD5 a8caa6d267951ad22e835233b5e50c46
SHA1 45c722c5958d99727a95d30eaa3032203d1f4ab2
SHA256 db7b70b0734285b8d9a1f3617e55603b0cb649d9bf0b7fbf8988c44e684f4e76
SHA512 9ee74bf576554210f8923dda8aa28f6dc7f3c5aa52da7b48a94beaf56cb4e27f1c3d0387cc9116e467631bc13c0e743341129bffa84b9db16ace1248a53b4cd7

memory/1096-8-0x0000000000400000-0x0000000000429000-memory.dmp

memory/1096-9-0x0000000000B00000-0x0000000000E4A000-memory.dmp

memory/1096-11-0x0000000000400000-0x0000000000429000-memory.dmp

memory/1096-12-0x0000000000600000-0x0000000000611000-memory.dmp

memory/3380-13-0x00000000091B0000-0x0000000009329000-memory.dmp

memory/4340-16-0x0000000000680000-0x0000000000696000-memory.dmp

memory/4340-17-0x0000000000680000-0x0000000000696000-memory.dmp

memory/4340-18-0x00000000004E0000-0x0000000000509000-memory.dmp

memory/4340-19-0x00000000023F0000-0x000000000273A000-memory.dmp

memory/4340-20-0x00000000004E0000-0x0000000000509000-memory.dmp

memory/4340-22-0x0000000002290000-0x0000000002320000-memory.dmp

memory/3380-23-0x00000000091B0000-0x0000000009329000-memory.dmp

memory/3380-26-0x0000000003430000-0x0000000003513000-memory.dmp

memory/3380-27-0x0000000003430000-0x0000000003513000-memory.dmp

memory/3380-30-0x0000000003430000-0x0000000003513000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-03-31 15:54

Reported

2024-03-31 15:57

Platform

win7-20240221-en

Max time kernel

122s

Max time network

123s

Command Line

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

Signatures

Processes

C:\Windows\system32\rundll32.exe

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

C:\Windows\SysWOW64\rundll32.exe

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1936 -s 248

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-03-31 15:54

Reported

2024-03-31 15:57

Platform

win10v2004-20231215-en

Max time kernel

92s

Max time network

123s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\gyalquzbu.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 3676 wrote to memory of 4716 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3676 wrote to memory of 4716 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3676 wrote to memory of 4716 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\gyalquzbu.dll,#1

C:\Windows\SysWOW64\rundll32.exe

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4716 -ip 4716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4716 -s 740

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 99.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 219.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 66.134.221.88.in-addr.arpa udp

Files

N/A