Malware Analysis Report

2024-12-07 22:34

Sample ID 240720-2jm2aazfrn
Target 604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118
SHA256 f62ca03ce9a80ac13bce5c2854a3efbf8bcb9f38cd2bf0dce8209af516b2338f
Tags
remcos money-logs rat
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

f62ca03ce9a80ac13bce5c2854a3efbf8bcb9f38cd2bf0dce8209af516b2338f

Threat Level: Known bad

The file 604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

remcos money-logs rat

Remcos

Loads dropped DLL

Suspicious use of SetThreadContext

Enumerates physical storage devices

Program crash

Unsigned PE

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-20 22:36

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

2024-07-20 22:36

Reported

2024-07-20 22:39

Platform

win10v2004-20240709-en

Max time kernel

141s

Max time network

108s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\p01ehv9wv.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 4884 wrote to memory of 3908 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4884 wrote to memory of 3908 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4884 wrote to memory of 3908 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\p01ehv9wv.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\p01ehv9wv.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3908 -ip 3908

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3908 -s 732

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 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.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 10.27.171.150.in-addr.arpa udp

Files

memory/3908-0-0x0000000010000000-0x0000000010008000-memory.dmp

memory/3908-1-0x0000000010000000-0x0000000010008000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-20 22:36

Reported

2024-07-20 22:39

Platform

win7-20240704-en

Max time kernel

148s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe"

Network

Country Destination Domain Proto
VN 103.153.76.111:2667 tcp
VN 103.153.76.111:2667 tcp
VN 103.153.76.111:2667 tcp
VN 103.153.76.111:2667 tcp
VN 103.153.76.111:2667 tcp
VN 103.153.76.111:2667 tcp
VN 103.153.76.111:2667 tcp

Files

\Users\Admin\AppData\Local\Temp\nso1FD1.tmp\System.dll

MD5 fccff8cb7a1067e23fd2e2b63971a8e1
SHA1 30e2a9e137c1223a78a0f7b0bf96a1c361976d91
SHA256 6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e
SHA512 f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

\Users\Admin\AppData\Local\Temp\p01ehv9wv.dll

MD5 3f68de8284608c37fa2273f9fc8d9b19
SHA1 7cf819fa8a6c2cf2e25811282445742ceba54a96
SHA256 523ebe047debe82ad79dcc25215c32df1fd93353c00bab190567025a64fdc0c3
SHA512 488310eea4ee067e25c9d9c2806db64ef79edef1e0030957ef899f360fac7420af0702878b6e85184c6c9ed992d2757142063308bc23ce134628cd8af116a4c3

memory/2448-11-0x0000000010000000-0x0000000010008000-memory.dmp

memory/1436-12-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2448-15-0x0000000010000000-0x0000000010008000-memory.dmp

memory/1436-14-0x0000000000400000-0x0000000000421000-memory.dmp

memory/1436-16-0x0000000000400000-0x0000000000421000-memory.dmp

memory/1436-17-0x0000000000400000-0x0000000000421000-memory.dmp

memory/1436-20-0x0000000000400000-0x0000000000421000-memory.dmp

memory/1436-22-0x0000000000400000-0x0000000000421000-memory.dmp

memory/1436-26-0x0000000000400000-0x0000000000421000-memory.dmp

C:\Users\Admin\AppData\Roaming\EXCEL\logs.dat

MD5 1c17f04fca6c25f1cb79fd5ed8dc6498
SHA1 933a90d6782de7e0cd4cdfe612af688eda651ae2
SHA256 948a5c00157d270ffda3d7630adbe16677182e90d5bc2aacfb4f474dabf0ba74
SHA512 f9b7c89bcde690a7ccac361e53733beb23ce24361ed3eb8e9062026d07ca08f457acfc68fd72e70d4e32b9d6336d087a874d33473005741525b52bd9c76a8908

memory/1436-30-0x0000000000400000-0x0000000000421000-memory.dmp

memory/1436-34-0x0000000000400000-0x0000000000421000-memory.dmp

memory/1436-38-0x0000000000400000-0x0000000000421000-memory.dmp

memory/1436-44-0x0000000000400000-0x0000000000421000-memory.dmp

memory/1436-48-0x0000000000400000-0x0000000000421000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-20 22:36

Reported

2024-07-20 22:39

Platform

win10v2004-20240704-en

Max time kernel

150s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe"

Signatures

Enumerates physical storage devices

Processes

C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\604199cbc88628d6d93fe507f23ac2d0_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4984 -ip 4984

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4984 -s 1000

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 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.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 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

C:\Users\Admin\AppData\Local\Temp\nsi756F.tmp\System.dll

MD5 fccff8cb7a1067e23fd2e2b63971a8e1
SHA1 30e2a9e137c1223a78a0f7b0bf96a1c361976d91
SHA256 6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e
SHA512 f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

C:\Users\Admin\AppData\Local\Temp\p01ehv9wv.dll

MD5 3f68de8284608c37fa2273f9fc8d9b19
SHA1 7cf819fa8a6c2cf2e25811282445742ceba54a96
SHA256 523ebe047debe82ad79dcc25215c32df1fd93353c00bab190567025a64fdc0c3
SHA512 488310eea4ee067e25c9d9c2806db64ef79edef1e0030957ef899f360fac7420af0702878b6e85184c6c9ed992d2757142063308bc23ce134628cd8af116a4c3

memory/4984-9-0x0000000010000000-0x0000000010008000-memory.dmp

memory/4984-10-0x0000000010000000-0x0000000010008000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-07-20 22:36

Reported

2024-07-20 22:39

Platform

win7-20240708-en

Max time kernel

117s

Max time network

118s

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 2376 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-07-20 22:36

Reported

2024-07-20 22:39

Platform

win10v2004-20240709-en

Max time kernel

148s

Max time network

151s

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 3024 wrote to memory of 4676 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3024 wrote to memory of 4676 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3024 wrote to memory of 4676 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 412 -p 4676 -ip 4676

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4676 -s 612

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 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 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.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 10.27.171.150.in-addr.arpa udp

Files

N/A

Analysis: behavioral5

Detonation Overview

Submitted

2024-07-20 22:36

Reported

2024-07-20 22:39

Platform

win7-20240704-en

Max time kernel

119s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\p01ehv9wv.dll,#1

Signatures

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2820 wrote to memory of 2964 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2820 wrote to memory of 2964 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2820 wrote to memory of 2964 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2820 wrote to memory of 2964 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2820 wrote to memory of 2964 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2820 wrote to memory of 2964 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2820 wrote to memory of 2964 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\p01ehv9wv.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\p01ehv9wv.dll,#1

Network

N/A

Files

memory/2964-0-0x0000000010000000-0x0000000010008000-memory.dmp

memory/2964-1-0x0000000010000000-0x0000000010008000-memory.dmp