formbook | d2139bcc2f4a4ac6e91de5f9f55d23743f61023e494fac3e13817a9f558d959e

General

Target

RFQ.xlsx
Size

1.4MB
MD5

c15273784bc0bf72b8c4a1118be6aa58
SHA1

6eca54832d4acd388a69a53ba5b8059e8cc2c29c
SHA256

d2139bcc2f4a4ac6e91de5f9f55d23743f61023e494fac3e13817a9f558d959e
SHA512

0c89c44fe4f2d9e0af857773d6a4d71e7311a1b44ea7b780cdb34f2ea38984e4d74876f0c9d608d8a30a331be295454d75baa51ef4dbdcb33e6d51c97cda1a7b

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.bytecommunication.com/aky/

Decoy

jeiksaoeklea.com

sagame-auto.net

soloseriolavoro.com

thecreatorsbook.com

superskritch.com

oroxequipment.com

heart-of-art.online

liwedfg.com

fisherofsouls.com

jota.xyz

nehyam.com

smart-contact-delivery.com

hoom.guru

dgryds.com

thesoakcpd.com

mishv.com

rings-factory.info

bero-craft-beers.com

podcastnamegenerators.com

856379813.xyz

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1584-15-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1584-16-0x000000000041EB60-mapping.dmp	formbook
behavioral1/memory/564-18-0x0000000000000000-mapping.dmp	formbook

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1872 EQNEDT32.EXE
Executes dropped EXE 2 IoCs

Processes:

vbc.exevbc.exe

pid process

956 vbc.exe
1584 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1872 EQNEDT32.EXE
1872 EQNEDT32.EXE
1872 EQNEDT32.EXE
1872 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	1872	EQNEDT32.EXE

pid	process
956	vbc.exe
1584	vbc.exe

pid	process
1872	EQNEDT32.EXE
1872	EQNEDT32.EXE
1872	EQNEDT32.EXE
1872	EQNEDT32.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

vbc.exevbc.exerundll32.exe

description	pid	process	target process
PID 956 set thread context of 1584	956	vbc.exe	vbc.exe
PID 1584 set thread context of 1236	1584	vbc.exe	Explorer.EXE
PID 564 set thread context of 1236	564	rundll32.exe	Explorer.EXE

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
exploit

Exploitation for Client Execution
T1203

Processes:

EQNEDT32.EXE

pid process

1872 EQNEDT32.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

pid	process
1872	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1944 EXCEL.EXE

pid	process
1944	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

vbc.exerundll32.exe

pid	process
1584	vbc.exe
1584	vbc.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe
564	rundll32.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

vbc.exerundll32.exe

pid process

1584 vbc.exe
1584 vbc.exe
1584 vbc.exe
564 rundll32.exe
564 rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

vbc.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1584 vbc.exe
Token: SeDebugPrivilege 564 rundll32.exe
Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1944 EXCEL.EXE
1944 EXCEL.EXE
1944 EXCEL.EXE

description	pid	process
Token: SeDebugPrivilege	1584	vbc.exe
Token: SeDebugPrivilege	564	rundll32.exe

pid	process
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1944	EXCEL.EXE
1944	EXCEL.EXE
1944	EXCEL.EXE

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

EQNEDT32.EXEvbc.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 1872 wrote to memory of 956	1872	EQNEDT32.EXE	vbc.exe
PID 1872 wrote to memory of 956	1872	EQNEDT32.EXE	vbc.exe
PID 1872 wrote to memory of 956	1872	EQNEDT32.EXE	vbc.exe
PID 1872 wrote to memory of 956	1872	EQNEDT32.EXE	vbc.exe
PID 956 wrote to memory of 1584	956	vbc.exe	vbc.exe
PID 956 wrote to memory of 1584	956	vbc.exe	vbc.exe
PID 956 wrote to memory of 1584	956	vbc.exe	vbc.exe
PID 956 wrote to memory of 1584	956	vbc.exe	vbc.exe
PID 956 wrote to memory of 1584	956	vbc.exe	vbc.exe
PID 956 wrote to memory of 1584	956	vbc.exe	vbc.exe
PID 956 wrote to memory of 1584	956	vbc.exe	vbc.exe
PID 1236 wrote to memory of 564	1236	Explorer.EXE	rundll32.exe
PID 1236 wrote to memory of 564	1236	Explorer.EXE	rundll32.exe
PID 1236 wrote to memory of 564	1236	Explorer.EXE	rundll32.exe
PID 1236 wrote to memory of 564	1236	Explorer.EXE	rundll32.exe
PID 1236 wrote to memory of 564	1236	Explorer.EXE	rundll32.exe
PID 1236 wrote to memory of 564	1236	Explorer.EXE	rundll32.exe
PID 1236 wrote to memory of 564	1236	Explorer.EXE	rundll32.exe
PID 564 wrote to memory of 1340	564	rundll32.exe	cmd.exe
PID 564 wrote to memory of 1340	564	rundll32.exe	cmd.exe
PID 564 wrote to memory of 1340	564	rundll32.exe	cmd.exe
PID 564 wrote to memory of 1340	564	rundll32.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1236

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\RFQ.xlsx
2⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1944

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\SysWOW64\rundll32.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:564

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Public\vbc.exe"
3⤵
PID:1340

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1872

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:956

C:\Users\Public\vbc.exe
"{path}"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1584

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Exploitation for Client Execution

1

T1203

Persistence

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
e58bbe8181fc690e1b6d806514afaa6d

SHA1
351a819674f7293a00dfed0f9e8c08a1dadad562

SHA256
30dd3160b2a93b2b20726e2707ad4781b8e6e3802865fc1f0582a3b9eb1644e0

SHA512
717ff39223e387d82e7b2fee06f9866bdcf86bfbaf5c7d42c435a568d7998810dd18a8703d345657badb13a54b4620cb2201739c28b08a4c0e52185c609e64d1

Download Submit
C:\Users\Public\vbc.exe
MD5
e58bbe8181fc690e1b6d806514afaa6d

SHA1
351a819674f7293a00dfed0f9e8c08a1dadad562

SHA256
30dd3160b2a93b2b20726e2707ad4781b8e6e3802865fc1f0582a3b9eb1644e0

SHA512
717ff39223e387d82e7b2fee06f9866bdcf86bfbaf5c7d42c435a568d7998810dd18a8703d345657badb13a54b4620cb2201739c28b08a4c0e52185c609e64d1

Download Submit
C:\Users\Public\vbc.exe
MD5
e58bbe8181fc690e1b6d806514afaa6d

SHA1
351a819674f7293a00dfed0f9e8c08a1dadad562

SHA256
30dd3160b2a93b2b20726e2707ad4781b8e6e3802865fc1f0582a3b9eb1644e0

SHA512
717ff39223e387d82e7b2fee06f9866bdcf86bfbaf5c7d42c435a568d7998810dd18a8703d345657badb13a54b4620cb2201739c28b08a4c0e52185c609e64d1

Download Submit
\Users\Public\vbc.exe
MD5
e58bbe8181fc690e1b6d806514afaa6d

SHA1
351a819674f7293a00dfed0f9e8c08a1dadad562

SHA256
30dd3160b2a93b2b20726e2707ad4781b8e6e3802865fc1f0582a3b9eb1644e0

SHA512
717ff39223e387d82e7b2fee06f9866bdcf86bfbaf5c7d42c435a568d7998810dd18a8703d345657badb13a54b4620cb2201739c28b08a4c0e52185c609e64d1

Download Submit
\Users\Public\vbc.exe
MD5
e58bbe8181fc690e1b6d806514afaa6d

SHA1
351a819674f7293a00dfed0f9e8c08a1dadad562

SHA256
30dd3160b2a93b2b20726e2707ad4781b8e6e3802865fc1f0582a3b9eb1644e0

SHA512
717ff39223e387d82e7b2fee06f9866bdcf86bfbaf5c7d42c435a568d7998810dd18a8703d345657badb13a54b4620cb2201739c28b08a4c0e52185c609e64d1

Download Submit
\Users\Public\vbc.exe
MD5
e58bbe8181fc690e1b6d806514afaa6d

SHA1
351a819674f7293a00dfed0f9e8c08a1dadad562

SHA256
30dd3160b2a93b2b20726e2707ad4781b8e6e3802865fc1f0582a3b9eb1644e0

SHA512
717ff39223e387d82e7b2fee06f9866bdcf86bfbaf5c7d42c435a568d7998810dd18a8703d345657badb13a54b4620cb2201739c28b08a4c0e52185c609e64d1

Download Submit
\Users\Public\vbc.exe
MD5
e58bbe8181fc690e1b6d806514afaa6d

SHA1
351a819674f7293a00dfed0f9e8c08a1dadad562

SHA256
30dd3160b2a93b2b20726e2707ad4781b8e6e3802865fc1f0582a3b9eb1644e0

SHA512
717ff39223e387d82e7b2fee06f9866bdcf86bfbaf5c7d42c435a568d7998810dd18a8703d345657badb13a54b4620cb2201739c28b08a4c0e52185c609e64d1

Download Submit
memory/564-21-0x0000000003130000-0x0000000003210000-memory.dmp

Filesize
896KB

Download
memory/564-19-0x0000000000970000-0x000000000097E000-memory.dmp

Filesize
56KB

Download
memory/564-18-0x0000000000000000-mapping.dmp

Download
memory/956-10-0x000000006C260000-0x000000006C94E000-memory.dmp

Filesize
6.9MB

Download
memory/956-14-0x0000000005420000-0x00000000054B3000-memory.dmp

Filesize
588KB

Download
memory/956-13-0x0000000000550000-0x000000000055E000-memory.dmp

Filesize
56KB

Download
memory/956-11-0x00000000008C0000-0x00000000008C1000-memory.dmp

Filesize
4KB

Download
memory/956-7-0x0000000000000000-mapping.dmp

Download
memory/1340-20-0x0000000000000000-mapping.dmp

Download
memory/1584-15-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1584-16-0x000000000041EB60-mapping.dmp

Download
memory/1660-2-0x000007FEF6080000-0x000007FEF62FA000-memory.dmp

Filesize
2.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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