formbook | a260058a1fd26d9661a5258ef8deba43c34718a49da63ba059d21a7a6c1778de

General

Target

PURCHASE ORDER NO7654567.exe
Size

298KB
MD5

ab99d25b2996150cc085ab8eae483f2d
SHA1

84f5200e330d6d4be843564d3494056a90da8fad
SHA256

a46eb9ad512b0b9355c24ab2320a1cd25758bc5e90485a476596982d41f9fe56
SHA512

cb328d225b61ce7231579488d29f62e5cef2fb9944abe8b5915fd86a264b76f794cd7bf12e5536a218cfcfcd38fe76e7c7a3dbd1e6fe0300cf33979b84929a0b

Score

10^/10

formbook wdm evasion persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

wdm

Decoy

rutherfordwomansclub.net

theclassicapplique.com

7-zd.com

kmngeg.info

claudinelloriot.com

bitcoinpride.info

mfmhdev.com

eenhar.com

onlinesmartnews.com

utilitariostucuman.com

find-quality-rentalcar.com

bodyartdnvr.science

silverfoxtail.com

zbrunda.com

killosaurus.com

heatheratl.com

xn--xhq30huts43cgs2e.com

lipmat.com

gegdon.net

foxinsurancedmv.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/756-132-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/756-134-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/4324-140-0x0000000000450000-0x000000000047D000-memory.dmp	formbook

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

systray.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	systray.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WPXHOR5H_BCL = "C:\\Program Files (x86)\\Hjnuhg\\3fr0rrnj.exe"	systray.exe

Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

PURCHASE ORDER NO7654567.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	PURCHASE ORDER NO7654567.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	PURCHASE ORDER NO7654567.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

PURCHASE ORDER NO7654567.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	PURCHASE ORDER NO7654567.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	PURCHASE ORDER NO7654567.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

PURCHASE ORDER NO7654567.exePURCHASE ORDER NO7654567.exesystray.exe

description	pid	process	target process
PID 1256 set thread context of 756	1256	PURCHASE ORDER NO7654567.exe	PURCHASE ORDER NO7654567.exe
PID 756 set thread context of 1052	756	PURCHASE ORDER NO7654567.exe	Explorer.EXE
PID 4324 set thread context of 1052	4324	systray.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

systray.exe

description ioc process

File opened for modification C:\Program Files (x86)\Hjnuhg\3fr0rrnj.exe systray.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Hjnuhg\3fr0rrnj.exe	systray.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

systray.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	systray.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

PURCHASE ORDER NO7654567.exesystray.exe

pid	process
756	PURCHASE ORDER NO7654567.exe
756	PURCHASE ORDER NO7654567.exe
756	PURCHASE ORDER NO7654567.exe
756	PURCHASE ORDER NO7654567.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe
4324	systray.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1052 Explorer.EXE
Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

PURCHASE ORDER NO7654567.exesystray.exe

pid process

756 PURCHASE ORDER NO7654567.exe
756 PURCHASE ORDER NO7654567.exe
756 PURCHASE ORDER NO7654567.exe
4324 systray.exe
4324 systray.exe
4324 systray.exe

pid	process
1052	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

PURCHASE ORDER NO7654567.exesystray.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	756	PURCHASE ORDER NO7654567.exe
Token: SeDebugPrivilege	4324	systray.exe
Token: SeShutdownPrivilege	1052	Explorer.EXE
Token: SeCreatePagefilePrivilege	1052	Explorer.EXE
Token: SeShutdownPrivilege	1052	Explorer.EXE
Token: SeCreatePagefilePrivilege	1052	Explorer.EXE

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

PURCHASE ORDER NO7654567.exeExplorer.EXEsystray.exe

description	pid	process	target process
PID 1256 wrote to memory of 756	1256	PURCHASE ORDER NO7654567.exe	PURCHASE ORDER NO7654567.exe
PID 1256 wrote to memory of 756	1256	PURCHASE ORDER NO7654567.exe	PURCHASE ORDER NO7654567.exe
PID 1256 wrote to memory of 756	1256	PURCHASE ORDER NO7654567.exe	PURCHASE ORDER NO7654567.exe
PID 1256 wrote to memory of 756	1256	PURCHASE ORDER NO7654567.exe	PURCHASE ORDER NO7654567.exe
PID 1256 wrote to memory of 756	1256	PURCHASE ORDER NO7654567.exe	PURCHASE ORDER NO7654567.exe
PID 1256 wrote to memory of 756	1256	PURCHASE ORDER NO7654567.exe	PURCHASE ORDER NO7654567.exe
PID 1052 wrote to memory of 4324	1052	Explorer.EXE	systray.exe
PID 1052 wrote to memory of 4324	1052	Explorer.EXE	systray.exe
PID 1052 wrote to memory of 4324	1052	Explorer.EXE	systray.exe
PID 4324 wrote to memory of 3008	4324	systray.exe	cmd.exe
PID 4324 wrote to memory of 3008	4324	systray.exe	cmd.exe
PID 4324 wrote to memory of 3008	4324	systray.exe	cmd.exe
PID 4324 wrote to memory of 4668	4324	systray.exe	cmd.exe
PID 4324 wrote to memory of 4668	4324	systray.exe	cmd.exe
PID 4324 wrote to memory of 4668	4324	systray.exe	cmd.exe
PID 4324 wrote to memory of 2656	4324	systray.exe	Firefox.exe
PID 4324 wrote to memory of 2656	4324	systray.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1052

C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER NO7654567.exe
"C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER NO7654567.exe"
2⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1256

C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER NO7654567.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:756

C:\Windows\SysWOW64\systray.exe
"C:\Windows\SysWOW64\systray.exe"
2⤵
- Adds policy Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4324

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER NO7654567.exe"
3⤵
PID:3008

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:4668

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:2656

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

2

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
memory/756-131-0x0000000000000000-mapping.dmp

Download
memory/756-132-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/756-134-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/756-135-0x0000000001650000-0x000000000199A000-memory.dmp

Filesize
3.3MB

Download
memory/756-136-0x00000000015E0000-0x00000000015F4000-memory.dmp

Filesize
80KB

Download
memory/1052-137-0x0000000008900000-0x0000000008A5D000-memory.dmp

Filesize
1.4MB

Download
memory/1052-144-0x0000000002B10000-0x0000000002BE5000-memory.dmp

Filesize
852KB

Download
memory/1256-130-0x0000000075080000-0x0000000075631000-memory.dmp

Filesize
5.7MB

Download
memory/3008-141-0x0000000000000000-mapping.dmp

Download
memory/4324-139-0x00000000001A0000-0x00000000001A6000-memory.dmp

Filesize
24KB

Download
memory/4324-142-0x00000000022E0000-0x000000000262A000-memory.dmp

Filesize
3.3MB

Download
memory/4324-143-0x0000000002150000-0x00000000021E3000-memory.dmp

Filesize
588KB

Download
memory/4324-140-0x0000000000450000-0x000000000047D000-memory.dmp

Filesize
180KB

Download
memory/4324-138-0x0000000000000000-mapping.dmp

Download
memory/4668-145-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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