Malware Analysis Report

2024-10-23 22:16

Sample ID 240507-yfg43scd3y
Target 2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118
SHA256 b8cc9e2b1509abfb88b4b570456839e5c00a7ffa52da7ef3333eef7d7b00922c
Tags
formbook h35 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

b8cc9e2b1509abfb88b4b570456839e5c00a7ffa52da7ef3333eef7d7b00922c

Threat Level: Known bad

The file 2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

formbook h35 rat spyware stealer trojan

Formbook

Formbook payload

Suspicious use of SetThreadContext

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-05-07 19:43

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-07 19:43

Reported

2024-05-07 19:46

Platform

win7-20240220-en

Max time kernel

147s

Max time network

126s

Command Line

C:\Windows\Explorer.EXE

Signatures

Formbook

trojan spyware stealer formbook

Formbook payload

rat
Description Indicator Process Target
N/A N/A N/A N/A
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\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2964 wrote to memory of 3036 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 1124 wrote to memory of 2424 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\rundll32.exe
PID 1124 wrote to memory of 2424 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\rundll32.exe
PID 1124 wrote to memory of 2424 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\rundll32.exe
PID 1124 wrote to memory of 2424 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\rundll32.exe
PID 1124 wrote to memory of 2424 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\rundll32.exe
PID 1124 wrote to memory of 2424 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\rundll32.exe
PID 1124 wrote to memory of 2424 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\rundll32.exe
PID 2424 wrote to memory of 2092 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 2424 wrote to memory of 2092 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 2424 wrote to memory of 2092 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe
PID 2424 wrote to memory of 2092 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\SysWOW64\rundll32.exe

"C:\Windows\SysWOW64\rundll32.exe"

C:\Windows\SysWOW64\cmd.exe

/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

Network

N/A

Files

memory/2964-0-0x00000000742DE000-0x00000000742DF000-memory.dmp

memory/2964-1-0x00000000013C0000-0x000000000145C000-memory.dmp

memory/2964-2-0x0000000000420000-0x0000000000440000-memory.dmp

memory/2964-3-0x0000000000330000-0x0000000000336000-memory.dmp

memory/2964-4-0x00000000742D0000-0x00000000749BE000-memory.dmp

memory/2964-5-0x00000000742D0000-0x00000000749BE000-memory.dmp

memory/3036-6-0x0000000000400000-0x000000000042A000-memory.dmp

memory/2964-7-0x00000000742D0000-0x00000000749BE000-memory.dmp

memory/3036-8-0x00000000024F0000-0x00000000027F3000-memory.dmp

memory/1124-10-0x0000000002EE0000-0x0000000002FE0000-memory.dmp

memory/1124-13-0x00000000044A0000-0x0000000004599000-memory.dmp

memory/3036-12-0x0000000000220000-0x0000000000234000-memory.dmp

memory/3036-11-0x0000000000400000-0x000000000042A000-memory.dmp

memory/2424-15-0x0000000000260000-0x000000000026E000-memory.dmp

memory/2424-14-0x0000000000260000-0x000000000026E000-memory.dmp

memory/2424-17-0x0000000000260000-0x000000000026E000-memory.dmp

memory/1124-20-0x00000000044A0000-0x0000000004599000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-07 19:43

Reported

2024-05-07 19:46

Platform

win10v2004-20240426-en

Max time kernel

136s

Max time network

101s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.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 SetThreadContext

Description Indicator Process Target
PID 3500 set thread context of 4564 N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\2171d7a11c215bdd470fcd398c776b6d_JaffaCakes118.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4564 -ip 4564

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4564 -s 540

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 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
NL 23.62.61.147:443 www.bing.com tcp
US 8.8.8.8:53 147.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 31.121.18.2.in-addr.arpa udp
US 52.111.227.11:443 tcp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp

Files

memory/3500-0-0x00000000746CE000-0x00000000746CF000-memory.dmp

memory/3500-1-0x0000000000CD0000-0x0000000000D6C000-memory.dmp

memory/3500-2-0x00000000056B0000-0x00000000056D0000-memory.dmp

memory/3500-3-0x0000000003000000-0x0000000003006000-memory.dmp

memory/3500-4-0x00000000746C0000-0x0000000074E70000-memory.dmp

memory/3500-5-0x0000000008150000-0x00000000086F4000-memory.dmp

memory/3500-6-0x0000000007CA0000-0x0000000007D32000-memory.dmp

memory/3500-7-0x0000000008080000-0x000000000811C000-memory.dmp

memory/4564-8-0x0000000000400000-0x0000000000420000-memory.dmp

memory/3500-12-0x00000000746C0000-0x0000000074E70000-memory.dmp

memory/4564-9-0x00000000005C0000-0x00000000005EA000-memory.dmp