formbook | 3f999fa0a43425869e768d6ca75c3e5a70dd34e475cdd20ee240076c6ed75749

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2022 16:33

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General

Target

SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe
Size

6KB
MD5

4568108633c246c348b7a6179f1eef10
SHA1

622978f85eafdd79be410d47551c0098bd924400
SHA256

3f999fa0a43425869e768d6ca75c3e5a70dd34e475cdd20ee240076c6ed75749
SHA512

70933c4ec2a44e4ed4d17745c19d3282094e965b2b3327f76af2810f861e51aa7f98602d1467668bf6be449d11db03ff4ce528a407b559042e7a785eae910209
SSDEEP

48:6LV5MbckIQXCIsN+nK/M1DIMAGd45hJpLOj4dd2xyiXii2qBHruul4dG7FWSfbNM:RckVaNd/KoGoJa4mhiNktGGFzNt

Score

10^/10

formbook fs44 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

fs44

Decoy

whneat.com

jljcw.net

pocodelivery.com

outofplacezine.com

yavuzcansigorta.com

xinhewood-cn.com

cartogogh.com

5avis.com

joyceyong.art

digitalsurf.community

blackcreekbarns.com

magazinedistribuidor.com

sportsgross.com

drevom.online

mayibeofservice.com

gareloi-digit.com

permitha.net

renaissanceestetica.com

facts-r-friends.com

dach-loc.com

Signatures

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

Formbook payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4972-145-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/4972-151-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3452-153-0x0000000000D00000-0x0000000000D2F000-memory.dmp	formbook
behavioral2/memory/3452-156-0x0000000000D00000-0x0000000000D2F000-memory.dmp	formbook

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

SecuriteInfo.com.Win32.DropperX-gen.276.10448.exeMSBuild.exechkdsk.exe

description	pid	process	target process
PID 1952 set thread context of 4972	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	MSBuild.exe
PID 4972 set thread context of 2756	4972	MSBuild.exe	Explorer.EXE
PID 3452 set thread context of 2756	3452	chkdsk.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 50 IoCs

Processes:

powershell.exeMSBuild.exechkdsk.exe

pid	process
1004	powershell.exe
1004	powershell.exe
4972	MSBuild.exe
4972	MSBuild.exe
4972	MSBuild.exe
4972	MSBuild.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe
3452	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2756 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

MSBuild.exechkdsk.exe

pid process

4972 MSBuild.exe
4972 MSBuild.exe
4972 MSBuild.exe
3452 chkdsk.exe
3452 chkdsk.exe

pid	process
2756	Explorer.EXE

pid	process
4972	MSBuild.exe
4972	MSBuild.exe
4972	MSBuild.exe
3452	chkdsk.exe
3452	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

Processes:

SecuriteInfo.com.Win32.DropperX-gen.276.10448.exepowershell.exeMSBuild.exechkdsk.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe
Token: SeDebugPrivilege	1004	powershell.exe
Token: SeDebugPrivilege	4972	MSBuild.exe
Token: SeDebugPrivilege	3452	chkdsk.exe
Token: SeShutdownPrivilege	2756	Explorer.EXE
Token: SeCreatePagefilePrivilege	2756	Explorer.EXE
Token: SeShutdownPrivilege	2756	Explorer.EXE
Token: SeCreatePagefilePrivilege	2756	Explorer.EXE
Token: SeShutdownPrivilege	2756	Explorer.EXE
Token: SeCreatePagefilePrivilege	2756	Explorer.EXE
Token: SeShutdownPrivilege	2756	Explorer.EXE
Token: SeCreatePagefilePrivilege	2756	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

SecuriteInfo.com.Win32.DropperX-gen.276.10448.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 1952 wrote to memory of 1004	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	powershell.exe
PID 1952 wrote to memory of 1004	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	powershell.exe
PID 1952 wrote to memory of 1004	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	powershell.exe
PID 1952 wrote to memory of 4972	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	MSBuild.exe
PID 1952 wrote to memory of 4972	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	MSBuild.exe
PID 1952 wrote to memory of 4972	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	MSBuild.exe
PID 1952 wrote to memory of 4972	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	MSBuild.exe
PID 1952 wrote to memory of 4972	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	MSBuild.exe
PID 1952 wrote to memory of 4972	1952	SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe	MSBuild.exe
PID 2756 wrote to memory of 3452	2756	Explorer.EXE	chkdsk.exe
PID 2756 wrote to memory of 3452	2756	Explorer.EXE	chkdsk.exe
PID 2756 wrote to memory of 3452	2756	Explorer.EXE	chkdsk.exe
PID 3452 wrote to memory of 3500	3452	chkdsk.exe	cmd.exe
PID 3452 wrote to memory of 3500	3452	chkdsk.exe	cmd.exe
PID 3452 wrote to memory of 3500	3452	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2756

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.DropperX-gen.276.10448.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1952

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQAwAA==
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1004

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe purecrypter.exe
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:4972

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3452

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
3⤵
PID:3500

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/1004-136-0x0000000000000000-mapping.dmp

Download
memory/1004-137-0x0000000004C10000-0x0000000004C46000-memory.dmp

Filesize
216KB

Download
memory/1004-138-0x0000000005280000-0x00000000058A8000-memory.dmp

Filesize
6.2MB

Download
memory/1004-139-0x0000000005960000-0x00000000059C6000-memory.dmp

Filesize
408KB

Download
memory/1004-140-0x0000000005B80000-0x0000000005BE6000-memory.dmp

Filesize
408KB

Download
memory/1004-141-0x0000000006190000-0x00000000061AE000-memory.dmp

Filesize
120KB

Download
memory/1004-142-0x00000000077C0000-0x0000000007E3A000-memory.dmp

Filesize
6.5MB

Download
memory/1004-143-0x00000000066A0000-0x00000000066BA000-memory.dmp

Filesize
104KB

Download
memory/1952-132-0x0000000000840000-0x0000000000848000-memory.dmp

Filesize
32KB

Download
memory/1952-133-0x00000000070F0000-0x0000000007182000-memory.dmp

Filesize
584KB

Download
memory/1952-134-0x0000000007740000-0x0000000007CE4000-memory.dmp

Filesize
5.6MB

Download
memory/1952-135-0x00000000071C0000-0x00000000071E2000-memory.dmp

Filesize
136KB

Download
memory/2756-187-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-176-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-205-0x0000000007B70000-0x0000000007B80000-memory.dmp

Filesize
64KB

Download
memory/2756-204-0x0000000007B70000-0x0000000007B80000-memory.dmp

Filesize
64KB

Download
memory/2756-149-0x0000000002F30000-0x0000000003091000-memory.dmp

Filesize
1.4MB

Download
memory/2756-203-0x0000000007B70000-0x0000000007B80000-memory.dmp

Filesize
64KB

Download
memory/2756-202-0x0000000007B70000-0x0000000007B80000-memory.dmp

Filesize
64KB

Download
memory/2756-201-0x0000000007B70000-0x0000000007B80000-memory.dmp

Filesize
64KB

Download
memory/2756-200-0x0000000007B70000-0x0000000007B80000-memory.dmp

Filesize
64KB

Download
memory/2756-199-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-198-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-197-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-196-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-158-0x0000000003320000-0x0000000003415000-memory.dmp

Filesize
980KB

Download
memory/2756-159-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-160-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-161-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-162-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-163-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-164-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-165-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-166-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-167-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-168-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-169-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-170-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-171-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-172-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-173-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-174-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-175-0x0000000003320000-0x0000000003415000-memory.dmp

Filesize
980KB

Download
memory/2756-195-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-177-0x0000000003120000-0x0000000003130000-memory.dmp

Filesize
64KB

Download
memory/2756-179-0x0000000008310000-0x0000000008320000-memory.dmp

Filesize
64KB

Download
memory/2756-178-0x0000000008310000-0x0000000008320000-memory.dmp

Filesize
64KB

Download
memory/2756-180-0x0000000008310000-0x0000000008320000-memory.dmp

Filesize
64KB

Download
memory/2756-181-0x0000000008310000-0x0000000008320000-memory.dmp

Filesize
64KB

Download
memory/2756-182-0x0000000008310000-0x0000000008320000-memory.dmp

Filesize
64KB

Download
memory/2756-183-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-184-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-185-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-186-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-194-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-188-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-189-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-190-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-191-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-192-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/2756-193-0x00000000011B0000-0x00000000011C0000-memory.dmp

Filesize
64KB

Download
memory/3452-157-0x00000000012F0000-0x0000000001383000-memory.dmp

Filesize
588KB

Download
memory/3452-156-0x0000000000D00000-0x0000000000D2F000-memory.dmp

Filesize
188KB

Download
memory/3452-154-0x00000000015B0000-0x00000000018FA000-memory.dmp

Filesize
3.3MB

Download
memory/3452-153-0x0000000000D00000-0x0000000000D2F000-memory.dmp

Filesize
188KB

Download
memory/3452-152-0x0000000000030000-0x000000000003A000-memory.dmp

Filesize
40KB

Download
memory/3452-150-0x0000000000000000-mapping.dmp

Download
memory/3500-155-0x0000000000000000-mapping.dmp

Download
memory/4972-144-0x0000000000000000-mapping.dmp

Download
memory/4972-145-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4972-151-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4972-148-0x0000000001AA0000-0x0000000001AB4000-memory.dmp

Filesize
80KB

Download
memory/4972-147-0x0000000001750000-0x0000000001A9A000-memory.dmp

Filesize
3.3MB

Download