formbook | bf081d3cd1264716c4522f06c6e0294eaa9834c8a06f11d501780d065d7c0135

General

Target

tmp.exe
Size

24KB
MD5

1706365b5058cbaa560b23dc297f9585
SHA1

9933c13c7db40fb5ddce9013c42496e66d7a1b5e
SHA256

bf081d3cd1264716c4522f06c6e0294eaa9834c8a06f11d501780d065d7c0135
SHA512

09821d8f4a2eb557d581d107e7e99cdec7738cb2227ebace1d7e9b350496117300cf47a640fc30796b1a80c59ff73f2a6adaa969ab28ede069458fdd877da665

Score

10^/10

formbook s4s9 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

s4s9

Decoy

qianyuandianshang.com

bernardklein.com

slhomeservices.com

findasaas.com

janellelancaster.xyz

umkpro.site

nr6949.online

mersquare.club

lanariproperties.com

3rdeyefocused.com

giftexpress8260.xyz

hilleleven.xyz

beajod.com

kosazs.online

ishare.team

mb314.com

xjjinxingda.com

ayekooprojectamazing.com

ballsybanter.com

todayshoppingbd.com

Signatures

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

Formbook payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1888-66-0x000000000041F0E0-mapping.dmp	formbook
behavioral1/memory/1888-65-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1888-72-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/1532-76-0x0000000000070000-0x000000000009F000-memory.dmp	formbook
behavioral1/memory/1532-79-0x0000000000070000-0x000000000009F000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

Processes:

tmp.exeMSBuild.exewscript.exe

description	pid	process	target process
PID 308 set thread context of 1888	308	tmp.exe	MSBuild.exe
PID 1888 set thread context of 1260	1888	MSBuild.exe	Explorer.EXE
PID 1532 set thread context of 1260	1532	wscript.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 27 IoCs

Processes:

powershell.exetmp.exeMSBuild.exewscript.exe

pid	process
1440	powershell.exe
308	tmp.exe
1888	MSBuild.exe
1888	MSBuild.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe
1532	wscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

MSBuild.exewscript.exe

pid process

1888 MSBuild.exe
1888 MSBuild.exe
1888 MSBuild.exe
1532 wscript.exe
1532 wscript.exe

pid	process
1888	MSBuild.exe
1888	MSBuild.exe
1888	MSBuild.exe
1532	wscript.exe
1532	wscript.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

tmp.exepowershell.exeMSBuild.exewscript.exe

description	pid	process
Token: SeDebugPrivilege	308	tmp.exe
Token: SeDebugPrivilege	1440	powershell.exe
Token: SeDebugPrivilege	1888	MSBuild.exe
Token: SeDebugPrivilege	1532	wscript.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

tmp.exeExplorer.EXEwscript.exe

description	pid	process	target process
PID 308 wrote to memory of 1440	308	tmp.exe	powershell.exe
PID 308 wrote to memory of 1440	308	tmp.exe	powershell.exe
PID 308 wrote to memory of 1440	308	tmp.exe	powershell.exe
PID 308 wrote to memory of 1440	308	tmp.exe	powershell.exe
PID 308 wrote to memory of 1888	308	tmp.exe	MSBuild.exe
PID 308 wrote to memory of 1888	308	tmp.exe	MSBuild.exe
PID 308 wrote to memory of 1888	308	tmp.exe	MSBuild.exe
PID 308 wrote to memory of 1888	308	tmp.exe	MSBuild.exe
PID 308 wrote to memory of 1888	308	tmp.exe	MSBuild.exe
PID 308 wrote to memory of 1888	308	tmp.exe	MSBuild.exe
PID 308 wrote to memory of 1888	308	tmp.exe	MSBuild.exe
PID 1260 wrote to memory of 1532	1260	Explorer.EXE	wscript.exe
PID 1260 wrote to memory of 1532	1260	Explorer.EXE	wscript.exe
PID 1260 wrote to memory of 1532	1260	Explorer.EXE	wscript.exe
PID 1260 wrote to memory of 1532	1260	Explorer.EXE	wscript.exe
PID 1532 wrote to memory of 732	1532	wscript.exe	cmd.exe
PID 1532 wrote to memory of 732	1532	wscript.exe	cmd.exe
PID 1532 wrote to memory of 732	1532	wscript.exe	cmd.exe
PID 1532 wrote to memory of 732	1532	wscript.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1260

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:308

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMgA=
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1440

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1888

C:\Windows\SysWOW64\autoconv.exe
"C:\Windows\SysWOW64\autoconv.exe"
2⤵
PID:848

C:\Windows\SysWOW64\wscript.exe
"C:\Windows\SysWOW64\wscript.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1532

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
3⤵
PID:732

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/308-55-0x0000000075C51000-0x0000000075C53000-memory.dmp

Filesize
8KB

Download
memory/308-56-0x0000000005710000-0x0000000005788000-memory.dmp

Filesize
480KB

Download
memory/308-57-0x00000000058D0000-0x0000000005962000-memory.dmp

Filesize
584KB

Download
memory/308-54-0x0000000000B40000-0x0000000000B4C000-memory.dmp

Filesize
48KB

Download
memory/732-73-0x0000000000000000-mapping.dmp

Download
memory/1260-70-0x0000000006A80000-0x0000000006C19000-memory.dmp

Filesize
1.6MB

Download
memory/1260-80-0x0000000006C20000-0x0000000006D8F000-memory.dmp

Filesize
1.4MB

Download
memory/1260-78-0x0000000006C20000-0x0000000006D8F000-memory.dmp

Filesize
1.4MB

Download
memory/1440-58-0x0000000000000000-mapping.dmp

Download
memory/1440-60-0x000000006F640000-0x000000006FBEB000-memory.dmp

Filesize
5.7MB

Download
memory/1440-61-0x000000006F640000-0x000000006FBEB000-memory.dmp

Filesize
5.7MB

Download
memory/1532-75-0x0000000002070000-0x0000000002373000-memory.dmp

Filesize
3.0MB

Download
memory/1532-71-0x0000000000000000-mapping.dmp

Download
memory/1532-74-0x0000000000C40000-0x0000000000C66000-memory.dmp

Filesize
152KB

Download
memory/1532-76-0x0000000000070000-0x000000000009F000-memory.dmp

Filesize
188KB

Download
memory/1532-77-0x00000000008F0000-0x0000000000983000-memory.dmp

Filesize
588KB

Download
memory/1532-79-0x0000000000070000-0x000000000009F000-memory.dmp

Filesize
188KB

Download
memory/1888-69-0x0000000000320000-0x0000000000334000-memory.dmp

Filesize
80KB

Download
memory/1888-67-0x0000000000820000-0x0000000000B23000-memory.dmp

Filesize
3.0MB

Download
memory/1888-72-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1888-65-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1888-66-0x000000000041F0E0-mapping.dmp

Download
memory/1888-63-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1888-62-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads