Malware Analysis Report

2025-01-02 12:15

Sample ID 240417-ey7mxafb2t
Target f50641a335b856c0a7b7d0c7e0f56b45_JaffaCakes118
SHA256 f927621a7bd2548f85a44695c585163e5d258ba8d2c81eb1d3b00b237443e3cf
Tags
asyncrat default rat
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

f927621a7bd2548f85a44695c585163e5d258ba8d2c81eb1d3b00b237443e3cf

Threat Level: Known bad

The file f50641a335b856c0a7b7d0c7e0f56b45_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Drops startup file

Suspicious use of SetThreadContext

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-17 04:22

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-17 04:22

Reported

2024-04-17 04:24

Platform

win7-20240220-en

Max time kernel

119s

Max time network

120s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\f50641a335b856c0a7b7d0c7e0f56b45_JaffaCakes118.ps1

Signatures

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\f50641a335b856c0a7b7d0c7e0f56b45_JaffaCakes118.ps1

Network

N/A

Files

memory/1620-4-0x000000001B500000-0x000000001B7E2000-memory.dmp

memory/1620-6-0x0000000002690000-0x0000000002698000-memory.dmp

memory/1620-5-0x000007FEF5480000-0x000007FEF5E1D000-memory.dmp

memory/1620-7-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1620-9-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1620-8-0x000007FEF5480000-0x000007FEF5E1D000-memory.dmp

memory/1620-10-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1620-11-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1620-12-0x0000000002CF0000-0x0000000002D70000-memory.dmp

memory/1620-13-0x000007FEF5480000-0x000007FEF5E1D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-17 04:22

Reported

2024-04-17 04:24

Platform

win10v2004-20240412-en

Max time kernel

147s

Max time network

155s

Command Line

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\f50641a335b856c0a7b7d0c7e0f56b45_JaffaCakes118.ps1

Signatures

AsyncRat

rat asyncrat

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DesktopLogin32bits.vbs C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3108 set thread context of 1452 N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Processes

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\f50641a335b856c0a7b7d0c7e0f56b45_JaffaCakes118.ps1

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 rick63.publicvm.com udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
NL 2.59.254.111:5900 rick63.publicvm.com tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
NL 2.59.254.111:5900 rick63.publicvm.com tcp
US 8.8.8.8:53 24.139.73.23.in-addr.arpa udp
NL 2.59.254.111:5900 rick63.publicvm.com tcp
NL 2.59.254.111:5900 rick63.publicvm.com tcp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
NL 2.59.254.111:5900 rick63.publicvm.com tcp
NL 2.59.254.111:5900 rick63.publicvm.com tcp
US 8.8.8.8:53 40.173.79.40.in-addr.arpa udp

Files

memory/3108-5-0x000001BF70490000-0x000001BF704B2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_buamt4fv.zim.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3108-10-0x00007FF815FA0000-0x00007FF816A61000-memory.dmp

memory/3108-12-0x000001BF6DE70000-0x000001BF6DE80000-memory.dmp

memory/3108-11-0x000001BF6DE70000-0x000001BF6DE80000-memory.dmp

memory/3108-13-0x000001BF6DE70000-0x000001BF6DE80000-memory.dmp

memory/3108-14-0x000001BF709E0000-0x000001BF70A56000-memory.dmp

memory/3108-15-0x000001BF70F90000-0x000001BF714B8000-memory.dmp

memory/3108-17-0x000001BF70940000-0x000001BF7094A000-memory.dmp

memory/1452-18-0x0000000000400000-0x0000000000412000-memory.dmp

memory/3108-21-0x00007FF815FA0000-0x00007FF816A61000-memory.dmp

memory/1452-22-0x0000000074AD0000-0x0000000075280000-memory.dmp

memory/1452-23-0x00000000029C0000-0x00000000029D0000-memory.dmp

memory/1452-24-0x0000000074AD0000-0x0000000075280000-memory.dmp

memory/1452-25-0x00000000029C0000-0x00000000029D0000-memory.dmp