Malware Analysis Report

2024-11-13 18:47

Sample ID 240725-vqly8stbjj
Target 707ffb47123b5b7469d458103e4fb05c_JaffaCakes118
SHA256 88959d54028a42de0d5d746d2a63146373c813268d5efdf012dec5d8aea2f54d
Tags
remcos remotehost discovery 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: behavioral5

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral6

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

88959d54028a42de0d5d746d2a63146373c813268d5efdf012dec5d8aea2f54d

Threat Level: Known bad

The file 707ffb47123b5b7469d458103e4fb05c_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

remcos remotehost discovery rat

Remcos

Loads dropped DLL

Suspicious use of SetThreadContext

System Location Discovery: System Language Discovery

Unsigned PE

Enumerates physical storage devices

Program crash

NSIS installer

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-25 17:11

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: behavioral1

Detonation Overview

Submitted

2024-07-25 17:11

Reported

2024-07-25 17:16

Platform

win7-20240704-en

Max time kernel

148s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe"

Signatures

Remcos

rat remcos

Loads dropped DLL

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2604 set thread context of 2304 N/A C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe N/A

Suspicious behavior: MapViewOfSection

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

Suspicious use of SetWindowsHookEx

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

Processes

C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe

"C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe"

C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe

"C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe"

Network

Country Destination Domain Proto
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp
VN 103.89.88.238:4299 tcp

Files

\Users\Admin\AppData\Local\Temp\nsyD3E3.tmp\System.dll

MD5 fccff8cb7a1067e23fd2e2b63971a8e1
SHA1 30e2a9e137c1223a78a0f7b0bf96a1c361976d91
SHA256 6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e
SHA512 f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

\Users\Admin\AppData\Local\Temp\u5qfpyjy2p.dll

MD5 40ec87b2fe39097f68409834c4d79d6f
SHA1 1efafb59ff23847310944327b87442be7a2e9068
SHA256 5567d4c9d8fba6f4b05e80835e85f854d056c2b863861af136164f1941322d86
SHA512 012742ef15eaa547bac6c59d92367e8ab004dca528651f8428d554e5351522ef777b6e73de26e285fd327cc5c171829727313c477c3cdbd6df6c8334f30d9b36

memory/2604-12-0x0000000074C80000-0x0000000074C89000-memory.dmp

memory/2304-13-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2604-15-0x0000000074C80000-0x0000000074C89000-memory.dmp

memory/2304-16-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-21-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-20-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-17-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-23-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-25-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-27-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-29-0x0000000000400000-0x0000000000421000-memory.dmp

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

MD5 d97f2336374868d65e22454afc8c3c5d
SHA1 b949cfa4c42d59d6ab64f7f0ac4d72f8e10aff48
SHA256 db802e5afd40c1d6952d98e462048967154bc4a0eb9627b309133a764f65e8da
SHA512 df505289296825b6b51f8240cae74eb22de16ad07100a2992d496e56d1e3f959458b1373973b432ba7c250ef1c57418fee567cd8976d76ebbfe8115aee0d3ec7

memory/2304-31-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-33-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-35-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-37-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-39-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-41-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-42-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-45-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2304-49-0x0000000000400000-0x0000000000421000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-25 17:11

Reported

2024-07-25 17:14

Platform

win10v2004-20240709-en

Max time kernel

136s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe"

Signatures

Loads dropped DLL

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

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe

"C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe"

C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe

"C:\Users\Admin\AppData\Local\Temp\Quotation Request.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3896 -ip 3896

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3896 -s 1012

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 147.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.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 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsmA411.tmp\System.dll

MD5 fccff8cb7a1067e23fd2e2b63971a8e1
SHA1 30e2a9e137c1223a78a0f7b0bf96a1c361976d91
SHA256 6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e
SHA512 f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

C:\Users\Admin\AppData\Local\Temp\u5qfpyjy2p.dll

MD5 40ec87b2fe39097f68409834c4d79d6f
SHA1 1efafb59ff23847310944327b87442be7a2e9068
SHA256 5567d4c9d8fba6f4b05e80835e85f854d056c2b863861af136164f1941322d86
SHA512 012742ef15eaa547bac6c59d92367e8ab004dca528651f8428d554e5351522ef777b6e73de26e285fd327cc5c171829727313c477c3cdbd6df6c8334f30d9b36

memory/3896-10-0x00000000751D0000-0x00000000751D9000-memory.dmp

memory/3896-11-0x00000000751D0000-0x00000000751D9000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-07-25 17:11

Reported

2024-07-25 17:15

Platform

win7-20240704-en

Max time kernel

121s

Max time network

122s

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

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 800 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-07-25 17:11

Reported

2024-07-25 17:15

Platform

win10v2004-20240709-en

Max time kernel

130s

Max time network

127s

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2544 wrote to memory of 1616 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2544 wrote to memory of 1616 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2544 wrote to memory of 1616 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 1616 -ip 1616

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1616 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 147.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.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

Files

N/A

Analysis: behavioral5

Detonation Overview

Submitted

2024-07-25 17:11

Reported

2024-07-25 17:15

Platform

win7-20240704-en

Max time kernel

118s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\u5qfpyjy2p.dll,#1

Signatures

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

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 2308 wrote to memory of 2224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2308 wrote to memory of 2224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2308 wrote to memory of 2224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2308 wrote to memory of 2224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2308 wrote to memory of 2224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2308 wrote to memory of 2224 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2308 wrote to memory of 2224 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\u5qfpyjy2p.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\u5qfpyjy2p.dll,#1

Network

N/A

Files

memory/2224-3-0x00000000751F0000-0x00000000751F9000-memory.dmp

memory/2224-2-0x0000000075200000-0x0000000075209000-memory.dmp

memory/2224-1-0x00000000751F0000-0x00000000751F9000-memory.dmp

memory/2224-0-0x0000000075200000-0x0000000075209000-memory.dmp

Analysis: behavioral6

Detonation Overview

Submitted

2024-07-25 17:11

Reported

2024-07-25 17:15

Platform

win10v2004-20240709-en

Max time kernel

134s

Max time network

128s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\u5qfpyjy2p.dll,#1

Signatures

Program crash

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1972 wrote to memory of 2384 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1972 wrote to memory of 2384 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1972 wrote to memory of 2384 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\u5qfpyjy2p.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\u5qfpyjy2p.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2384 -ip 2384

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2384 -s 732

Network

Country Destination Domain Proto
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.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 58.99.105.20.in-addr.arpa udp

Files

memory/2384-0-0x0000000075240000-0x0000000075249000-memory.dmp

memory/2384-1-0x0000000075240000-0x0000000075249000-memory.dmp