Malware Analysis Report

2024-10-23 22:12

Sample ID 240716-yyjqma1cjg
Target 4fdee5a59295dca9f41205a51b593c35_JaffaCakes118
SHA256 6133a328e01379d6e45f954db62359ec9217b220a1e359253dd479bce7905b19
Tags
formbook aky rat spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral6

Detonation Overview

Command Line

Signatures

Processes

Network

Files

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: behavioral5

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

6133a328e01379d6e45f954db62359ec9217b220a1e359253dd479bce7905b19

Threat Level: Known bad

The file 4fdee5a59295dca9f41205a51b593c35_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

formbook aky rat spyware stealer trojan

Formbook

Formbook payload

Loads dropped DLL

Suspicious use of SetThreadContext

Enumerates physical storage devices

Program crash

Unsigned PE

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-16 20:11

Signatures

Unsigned PE

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

NSIS installer

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

Analysis: behavioral6

Detonation Overview

Submitted

2024-07-16 20:11

Reported

2024-07-16 20:14

Platform

win10v2004-20240709-en

Max time kernel

138s

Max time network

108s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\yrcvb.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 1976 wrote to memory of 4464 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1976 wrote to memory of 4464 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1976 wrote to memory of 4464 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\yrcvb.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\yrcvb.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4464 -ip 4464

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4464 -s 696

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

memory/4464-0-0x0000000075680000-0x0000000075686000-memory.dmp

memory/4464-1-0x0000000075680000-0x0000000075686000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-16 20:11

Reported

2024-07-16 20:14

Platform

win7-20240704-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe"

Signatures

Formbook

trojan spyware stealer formbook

Formbook payload

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

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsjC18C.tmp\System.dll

MD5 fccff8cb7a1067e23fd2e2b63971a8e1
SHA1 30e2a9e137c1223a78a0f7b0bf96a1c361976d91
SHA256 6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e
SHA512 f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

memory/1720-11-0x0000000074730000-0x0000000074736000-memory.dmp

\Users\Admin\AppData\Local\Temp\yrcvb.dll

MD5 2072ef8fa8d7b21c6710dd45329ed960
SHA1 c37e442611dca9cba6af656c1f570432eb1f8d34
SHA256 74c0cbf5666dfdd57165bf6ec429d69b1b471ee10d9451d059099c9a4af0453a
SHA512 198aacdc2178a5ce7cbf834346f7c97b9c95f19796879281472c9c582bae2a7cb850e37d76b553f84601563ff2d225b10db26213c4f12eb5f0b3392d93585b61

memory/2528-12-0x0000000000400000-0x000000000042E000-memory.dmp

memory/1720-13-0x0000000074730000-0x0000000074736000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-16 20:11

Reported

2024-07-16 20:14

Platform

win10v2004-20240709-en

Max time kernel

143s

Max time network

111s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe"

Signatures

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\4fdee5a59295dca9f41205a51b593c35_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 2480 -ip 2480

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2480 -s 1012

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 101.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsu9F1F.tmp\System.dll

MD5 fccff8cb7a1067e23fd2e2b63971a8e1
SHA1 30e2a9e137c1223a78a0f7b0bf96a1c361976d91
SHA256 6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e
SHA512 f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

C:\Users\Admin\AppData\Local\Temp\yrcvb.dll

MD5 2072ef8fa8d7b21c6710dd45329ed960
SHA1 c37e442611dca9cba6af656c1f570432eb1f8d34
SHA256 74c0cbf5666dfdd57165bf6ec429d69b1b471ee10d9451d059099c9a4af0453a
SHA512 198aacdc2178a5ce7cbf834346f7c97b9c95f19796879281472c9c582bae2a7cb850e37d76b553f84601563ff2d225b10db26213c4f12eb5f0b3392d93585b61

memory/2480-8-0x00000000749A0000-0x00000000749A6000-memory.dmp

memory/2480-10-0x00000000749A0000-0x00000000749A6000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-07-16 20:11

Reported

2024-07-16 20:14

Platform

win7-20240705-en

Max time kernel

118s

Max time network

119s

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 1836 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-07-16 20:11

Reported

2024-07-16 20:14

Platform

win10v2004-20240709-en

Max time kernel

141s

Max time network

150s

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 1140 wrote to memory of 4456 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1140 wrote to memory of 4456 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1140 wrote to memory of 4456 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 408 -p 4456 -ip 4456

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4456 -s 616

Network

Country Destination Domain Proto
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 147.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp

Files

N/A

Analysis: behavioral5

Detonation Overview

Submitted

2024-07-16 20:11

Reported

2024-07-16 20:14

Platform

win7-20240708-en

Max time kernel

122s

Max time network

127s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\yrcvb.dll,#1

Signatures

Program crash

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

Suspicious behavior: EnumeratesProcesses

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

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\yrcvb.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\yrcvb.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2140 -s 276

Network

N/A

Files

memory/2140-1-0x0000000074920000-0x0000000074926000-memory.dmp

memory/2140-3-0x00000000749C0000-0x00000000749C6000-memory.dmp

memory/2140-2-0x0000000074910000-0x0000000074916000-memory.dmp

memory/2140-0-0x00000000749C0000-0x00000000749C6000-memory.dmp

memory/2140-4-0x0000000074920000-0x0000000074926000-memory.dmp

memory/2140-6-0x0000000074910000-0x0000000074916000-memory.dmp

memory/2140-5-0x00000000749C0000-0x00000000749C6000-memory.dmp