formbook | 4c3ef62fadfcb2add42105636653251735afa0c6de4ab4fd61287e35580d97e7

General

Target

MY0025007022.exe
Size

67KB
MD5

09d635e7fac13ca49037a27ffa10cdbf
SHA1

b12b7a877682838b5b1673ee4783bbf44eba4863
SHA256

b12c23f3cf0937291c634f1505ca5123dc08363dcc0f766ac029b1238cade11d
SHA512

f50052ccd601ef2830e0c1a5df7e4414249e55acc8aeef3a0eb1ca16f8d92da372ae25a94fc6a9deda85a812e01104f9000b429dc70cbcab0bc6fb46aaf12f85

Score

10^/10

formbook fs44 rat spyware stealer suricata 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
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Formbook payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4424-141-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/4424-147-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/408-150-0x0000000000760000-0x000000000078F000-memory.dmp	formbook
behavioral2/memory/408-152-0x0000000000760000-0x000000000078F000-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:

MY0025007022.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1101907861-274115917-2188613224-1000\Control Panel\International\Geo\Nation	MY0025007022.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

MY0025007022.exeMSBuild.exemsiexec.exe

description	pid	process	target process
PID 980 set thread context of 4424	980	MY0025007022.exe	MSBuild.exe
PID 4424 set thread context of 3068	4424	MSBuild.exe	Explorer.EXE
PID 408 set thread context of 3068	408	msiexec.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

Suspicious behavior: EnumeratesProcesses 30 IoCs

Processes:

powershell.exeMY0025007022.exeMSBuild.exemsiexec.exe

pid	process
1956	powershell.exe
1956	powershell.exe
980	MY0025007022.exe
980	MY0025007022.exe
4424	MSBuild.exe
4424	MSBuild.exe
4424	MSBuild.exe
4424	MSBuild.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe
408	msiexec.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3068 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

MSBuild.exemsiexec.exe

pid process

4424 MSBuild.exe
4424 MSBuild.exe
4424 MSBuild.exe
408 msiexec.exe
408 msiexec.exe

pid	process
3068	Explorer.EXE

pid	process
4424	MSBuild.exe
4424	MSBuild.exe
4424	MSBuild.exe
408	msiexec.exe
408	msiexec.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

MY0025007022.exepowershell.exeMSBuild.exemsiexec.exe

description	pid	process
Token: SeDebugPrivilege	980	MY0025007022.exe
Token: SeDebugPrivilege	1956	powershell.exe
Token: SeDebugPrivilege	4424	MSBuild.exe
Token: SeDebugPrivilege	408	msiexec.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

MY0025007022.exeExplorer.EXEmsiexec.exe

description	pid	process	target process
PID 980 wrote to memory of 1956	980	MY0025007022.exe	powershell.exe
PID 980 wrote to memory of 1956	980	MY0025007022.exe	powershell.exe
PID 980 wrote to memory of 1956	980	MY0025007022.exe	powershell.exe
PID 980 wrote to memory of 4424	980	MY0025007022.exe	MSBuild.exe
PID 980 wrote to memory of 4424	980	MY0025007022.exe	MSBuild.exe
PID 980 wrote to memory of 4424	980	MY0025007022.exe	MSBuild.exe
PID 980 wrote to memory of 4424	980	MY0025007022.exe	MSBuild.exe
PID 980 wrote to memory of 4424	980	MY0025007022.exe	MSBuild.exe
PID 980 wrote to memory of 4424	980	MY0025007022.exe	MSBuild.exe
PID 3068 wrote to memory of 408	3068	Explorer.EXE	msiexec.exe
PID 3068 wrote to memory of 408	3068	Explorer.EXE	msiexec.exe
PID 3068 wrote to memory of 408	3068	Explorer.EXE	msiexec.exe
PID 408 wrote to memory of 4544	408	msiexec.exe	cmd.exe
PID 408 wrote to memory of 4544	408	msiexec.exe	cmd.exe
PID 408 wrote to memory of 4544	408	msiexec.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3068

C:\Users\Admin\AppData\Local\Temp\MY0025007022.exe
"C:\Users\Admin\AppData\Local\Temp\MY0025007022.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:980

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMwAwAA==
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1956

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe purecrypter
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:4424

C:\Windows\SysWOW64\msiexec.exe
"C:\Windows\SysWOW64\msiexec.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:408

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
3⤵
PID:4544

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/408-146-0x0000000000000000-mapping.dmp

Download
memory/408-153-0x00000000026E0000-0x0000000002773000-memory.dmp

Filesize
588KB

Download
memory/408-152-0x0000000000760000-0x000000000078F000-memory.dmp

Filesize
188KB

Download
memory/408-150-0x0000000000760000-0x000000000078F000-memory.dmp

Filesize
188KB

Download
memory/408-151-0x0000000002870000-0x0000000002BBA000-memory.dmp

Filesize
3.3MB

Download
memory/408-149-0x0000000000CB0000-0x0000000000CC2000-memory.dmp

Filesize
72KB

Download
memory/980-131-0x00000000064E0000-0x0000000006502000-memory.dmp

Filesize
136KB

Download
memory/980-130-0x0000000000E20000-0x0000000000E36000-memory.dmp

Filesize
88KB

Download
memory/1956-136-0x00000000062F0000-0x0000000006356000-memory.dmp

Filesize
408KB

Download
memory/1956-135-0x0000000006280000-0x00000000062E6000-memory.dmp

Filesize
408KB

Download
memory/1956-132-0x0000000000000000-mapping.dmp

Download
memory/1956-139-0x0000000006E30000-0x0000000006E4A000-memory.dmp

Filesize
104KB

Download
memory/1956-138-0x00000000081D0000-0x000000000884A000-memory.dmp

Filesize
6.5MB

Download
memory/1956-133-0x0000000003370000-0x00000000033A6000-memory.dmp

Filesize
216KB

Download
memory/1956-134-0x0000000005AE0000-0x0000000006108000-memory.dmp

Filesize
6.2MB

Download
memory/1956-137-0x0000000006950000-0x000000000696E000-memory.dmp

Filesize
120KB

Download
memory/3068-155-0x0000000002910000-0x0000000002A43000-memory.dmp

Filesize
1.2MB

Download
memory/3068-154-0x0000000002910000-0x0000000002A43000-memory.dmp

Filesize
1.2MB

Download
memory/3068-145-0x00000000079B0000-0x0000000007B5B000-memory.dmp

Filesize
1.7MB

Download
memory/4424-144-0x0000000000CB0000-0x0000000000CC4000-memory.dmp

Filesize
80KB

Download
memory/4424-147-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4424-143-0x00000000011C0000-0x000000000150A000-memory.dmp

Filesize
3.3MB

Download
memory/4424-141-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4424-140-0x0000000000000000-mapping.dmp

Download
memory/4544-148-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads