Malware Analysis Report

2024-10-23 22:14

Sample ID 240717-ldl9ssvaqr
Target nell.doc
SHA256 da7597eed278b6ebb330685e1caea6c1bc6ad9b2abff9afa05633f4cb5f7a123
Tags
formbook btrd rat spyware stealer trojan
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 Overview

score
10/10

SHA256

da7597eed278b6ebb330685e1caea6c1bc6ad9b2abff9afa05633f4cb5f7a123

Threat Level: Known bad

The file nell.doc was found to be: Known bad.

Malicious Activity Summary

formbook btrd rat spyware stealer trojan

Formbook

Formbook payload

Downloads MZ/PE file

Blocklisted process makes network request

Executes dropped EXE

Loads dropped DLL

Suspicious use of SetThreadContext

Drops file in Windows directory

Office loads VBA resources, possible macro or embedded object present

Enumerates system info in registry

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Launches Equation Editor

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: AddClipboardFormatListener

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-17 09:25

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-17 09:25

Reported

2024-07-17 09:27

Platform

win7-20240705-en

Max time kernel

149s

Max time network

143s

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
N/A N/A N/A N/A

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE N/A
N/A N/A C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE N/A

Downloads MZ/PE file

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\nell56789.scr N/A
N/A N/A C:\Users\Admin\AppData\Roaming\nell56789.scr N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2984 set thread context of 2704 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 2704 set thread context of 1388 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Windows\Explorer.EXE
PID 2704 set thread context of 1388 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Windows\Explorer.EXE
PID 748 set thread context of 1388 N/A C:\Windows\SysWOW64\wininit.exe C:\Windows\Explorer.EXE

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Debug\WIA\wiatrace.log C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A

Office loads VBA resources, possible macro or embedded object present

Launches Equation Editor

exploit
Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE N/A

Suspicious behavior: AddClipboardFormatListener

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\nell56789.scr N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\wininit.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\Explorer.EXE N/A
Token: SeShutdownPrivilege N/A C:\Windows\Explorer.EXE N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A
N/A N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1648 wrote to memory of 2984 N/A C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 1648 wrote to memory of 2984 N/A C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 1648 wrote to memory of 2984 N/A C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 1648 wrote to memory of 2984 N/A C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 2984 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 2984 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 2984 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 2984 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 2984 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 2984 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 2984 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Users\Admin\AppData\Roaming\nell56789.scr
PID 1712 wrote to memory of 1216 N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE C:\Windows\splwow64.exe
PID 1712 wrote to memory of 1216 N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE C:\Windows\splwow64.exe
PID 1712 wrote to memory of 1216 N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE C:\Windows\splwow64.exe
PID 1712 wrote to memory of 1216 N/A C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE C:\Windows\splwow64.exe
PID 2704 wrote to memory of 748 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Windows\SysWOW64\wininit.exe
PID 2704 wrote to memory of 748 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Windows\SysWOW64\wininit.exe
PID 2704 wrote to memory of 748 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Windows\SysWOW64\wininit.exe
PID 2704 wrote to memory of 748 N/A C:\Users\Admin\AppData\Roaming\nell56789.scr C:\Windows\SysWOW64\wininit.exe
PID 748 wrote to memory of 2332 N/A C:\Windows\SysWOW64\wininit.exe C:\Windows\SysWOW64\cmd.exe
PID 748 wrote to memory of 2332 N/A C:\Windows\SysWOW64\wininit.exe C:\Windows\SysWOW64\cmd.exe
PID 748 wrote to memory of 2332 N/A C:\Windows\SysWOW64\wininit.exe C:\Windows\SysWOW64\cmd.exe
PID 748 wrote to memory of 2332 N/A C:\Windows\SysWOW64\wininit.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE

"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\nell.rtf"

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE

"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding

C:\Users\Admin\AppData\Roaming\nell56789.scr

"C:\Users\Admin\AppData\Roaming\nell56789.scr"

C:\Users\Admin\AppData\Roaming\nell56789.scr

"C:\Users\Admin\AppData\Roaming\nell56789.scr"

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\SysWOW64\autofmt.exe

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

C:\Windows\splwow64.exe

C:\Windows\splwow64.exe 12288

C:\Windows\SysWOW64\wininit.exe

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

C:\Windows\SysWOW64\cmd.exe

/c del "C:\Users\Admin\AppData\Roaming\nell56789.scr"

Network

Country Destination Domain Proto
US 8.8.8.8:53 heinltd.top udp
US 104.21.84.22:443 heinltd.top tcp
US 8.8.8.8:53 c.pki.goog udp
GB 216.58.201.99:80 c.pki.goog tcp
US 8.8.8.8:53 www.cnoszirzbkaqz.com udp
US 167.172.228.26:80 www.cnoszirzbkaqz.com tcp
US 8.8.8.8:53 www.jeffreestar.gold udp
US 3.33.130.190:80 www.jeffreestar.gold tcp
US 8.8.8.8:53 www.concretecountertopsolutios.com udp
NL 212.32.237.91:80 www.concretecountertopsolutios.com tcp
US 8.8.8.8:53 www.librarylatte.com udp
LT 84.32.84.32:80 www.librarylatte.com tcp
US 8.8.8.8:53 www.criika.net udp
US 8.8.8.8:53 www.koormm.top udp
SG 54.251.60.224:80 www.koormm.top tcp

Files

memory/1712-0-0x000000002F581000-0x000000002F582000-memory.dmp

memory/1712-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

memory/1712-2-0x000000007108D000-0x0000000071098000-memory.dmp

\Users\Admin\AppData\Roaming\nell56789.scr

MD5 bbb12cd2696ac986ad79c0116da987f4
SHA1 802f65e20825ee6b2b5074e6084bc284241278d8
SHA256 d8e6a83561b9d8dbe84de21795763589d2626904ac6406ddfe2dc2342c4edb8e
SHA512 318e885d898a42b2751d387ba48b6fb359d3665d18637de48f35a53ea525bccbd1d9175a1f0429051d0a714ee887900ad3577db36d31d65f89ba7fb185484911

memory/2984-27-0x000000006B23E000-0x000000006B23F000-memory.dmp

memory/2984-28-0x0000000000100000-0x00000000001A0000-memory.dmp

memory/2984-29-0x0000000002130000-0x0000000002192000-memory.dmp

memory/2984-30-0x0000000000660000-0x0000000000668000-memory.dmp

memory/2704-38-0x0000000000080000-0x00000000000AF000-memory.dmp

memory/2704-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2704-33-0x0000000000080000-0x00000000000AF000-memory.dmp

memory/2704-31-0x0000000000080000-0x00000000000AF000-memory.dmp

memory/2704-41-0x0000000000080000-0x00000000000AF000-memory.dmp

memory/748-42-0x00000000005B0000-0x00000000005CA000-memory.dmp

memory/748-43-0x00000000000C0000-0x00000000000EF000-memory.dmp

memory/1712-44-0x000000007108D000-0x0000000071098000-memory.dmp

memory/1388-45-0x00000000051F0000-0x00000000052F8000-memory.dmp

memory/1388-48-0x0000000006B00000-0x0000000006C50000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

MD5 de3031d0e18ddfb08b5ed543fbf5e138
SHA1 f245502af4efe21e20db08bc3b0cd9e603e38a8d
SHA256 1c4b548960023f29693ef3b72779365f82bd94cc09100548a174183e4642649d
SHA512 83f2c137bcd3e05e5bb08aa18e65c491f264bf2def9875486b0cfae6c07ae02fd500e830400eaf32cce6034738165fdcc18dfd73ad0f173d7077d9d2c5630223

memory/1712-75-0x000000005FFF0000-0x0000000060000000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-17 09:25

Reported

2024-07-17 09:27

Platform

win10v2004-20240709-en

Max time kernel

141s

Max time network

124s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\nell.rtf" /o ""

Signatures

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Suspicious behavior: AddClipboardFormatListener

Description Indicator Process Target
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Processes

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE

"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\nell.rtf" /o ""

Network

Country Destination Domain Proto
US 8.8.8.8:53 roaming.officeapps.live.com udp
GB 52.109.28.47:443 roaming.officeapps.live.com tcp
US 8.8.8.8:53 18.89.109.52.in-addr.arpa udp
US 8.8.8.8:53 47.28.109.52.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 58.99.105.20.in-addr.arpa udp
US 8.8.8.8:53 175.117.168.52.in-addr.arpa udp
US 8.8.8.8:53 metadata.templates.cdn.office.net udp
GB 2.17.209.140:443 metadata.templates.cdn.office.net tcp
US 8.8.8.8:53 binaries.templates.cdn.office.net udp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
GB 173.222.211.24:443 binaries.templates.cdn.office.net tcp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 140.209.17.2.in-addr.arpa udp
US 8.8.8.8:53 24.211.222.173.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.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 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.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 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp

Files

memory/3376-0-0x00007FFB2B850000-0x00007FFB2B860000-memory.dmp

memory/3376-1-0x00007FFB6B86D000-0x00007FFB6B86E000-memory.dmp

memory/3376-3-0x00007FFB2B850000-0x00007FFB2B860000-memory.dmp

memory/3376-2-0x00007FFB2B850000-0x00007FFB2B860000-memory.dmp

memory/3376-4-0x00007FFB2B850000-0x00007FFB2B860000-memory.dmp

memory/3376-5-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-6-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-7-0x00007FFB2B850000-0x00007FFB2B860000-memory.dmp

memory/3376-11-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-10-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-13-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-14-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-12-0x00007FFB29650000-0x00007FFB29660000-memory.dmp

memory/3376-9-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-8-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-15-0x00007FFB29650000-0x00007FFB29660000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\UProof\CUSTOM.DIC

MD5 d29962abc88624befc0135579ae485ec
SHA1 e40a6458296ec6a2427bcb280572d023a9862b31
SHA256 a91a702aab9b8dd722843d3d208a21bcfa6556dfc64e2ded63975de4511eb866
SHA512 4311e87d8d5559248d4174908817a4ddc917bf7378114435cf12da8ccb7a1542c851812afbaf7dc106771bdb2e2d05f52e7d0c50d110fc7fffe4395592492c2f

C:\Users\Admin\AppData\Local\Temp\TCDED69.tmp\sist02.xsl

MD5 f883b260a8d67082ea895c14bf56dd56
SHA1 7954565c1f243d46ad3b1e2f1baf3281451fc14b
SHA256 ef4835db41a485b56c2ef0ff7094bc2350460573a686182bc45fd6613480e353
SHA512 d95924a499f32d9b4d9a7d298502181f9e9048c21dbe0496fa3c3279b263d6f7d594b859111a99b1a53bd248ee69b867d7b1768c42e1e40934e0b990f0ce051e

memory/3376-211-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-212-0x00007FFB6B86D000-0x00007FFB6B86E000-memory.dmp

memory/3376-213-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-214-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp

memory/3376-238-0x00007FFB2B850000-0x00007FFB2B860000-memory.dmp

memory/3376-241-0x00007FFB2B850000-0x00007FFB2B860000-memory.dmp

memory/3376-240-0x00007FFB2B850000-0x00007FFB2B860000-memory.dmp

memory/3376-239-0x00007FFB2B850000-0x00007FFB2B860000-memory.dmp

memory/3376-242-0x00007FFB6B7D0000-0x00007FFB6B9C5000-memory.dmp