formbook | 39c3cb2bce96c98cde9bec9fff034acca99b592f0a4ebec39a6017f3554a56fa

General

Target

Invoice pdf.exe
Size

661KB
MD5

95ad0de0d121d51993dc0e546f82772c
SHA1

e2830744f6497321e7b4c2a49d8270ea91b923c8
SHA256

494b892495fb6f002fd36477446bfc59f686fe73710d55dc782de8512452e535
SHA512

07b83558bd2269cdafd56ca91ddbe396b1d76cc5466fe13f2fff102ce49afedcb446b734922cd4dd6f8f9d2ac80bdcd8f9287ac11415c3c1d3f6dceaef8fe5ae

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://w��5 �@q[*��S=��m

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
behavioral2/memory/3436-118-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/3436-119-0x000000000041EAC0-mapping.dmp	formbook
behavioral2/memory/1308-128-0x0000000000E60000-0x0000000000E8E000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

Processes:

Invoice pdf.exeInvoice pdf.exemsiexec.exe

description	pid	process	target process
PID 3656 set thread context of 3436	3656	Invoice pdf.exe	Invoice pdf.exe
PID 3436 set thread context of 3040	3436	Invoice pdf.exe	Explorer.EXE
PID 1308 set thread context of 3040	1308	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
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

412 schtasks.exe

pid	process
412	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

Invoice pdf.exeInvoice pdf.exemsiexec.exe

pid	process
3656	Invoice pdf.exe
3656	Invoice pdf.exe
3656	Invoice pdf.exe
3656	Invoice pdf.exe
3436	Invoice pdf.exe
3436	Invoice pdf.exe
3436	Invoice pdf.exe
3436	Invoice pdf.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe
1308	msiexec.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

Invoice pdf.exemsiexec.exe

pid process

3436 Invoice pdf.exe
3436 Invoice pdf.exe
3436 Invoice pdf.exe
1308 msiexec.exe
1308 msiexec.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Invoice pdf.exeInvoice pdf.exemsiexec.exe

description pid process

Token: SeDebugPrivilege 3656 Invoice pdf.exe
Token: SeDebugPrivilege 3436 Invoice pdf.exe
Token: SeDebugPrivilege 1308 msiexec.exe

pid	process
3436	Invoice pdf.exe
3436	Invoice pdf.exe
3436	Invoice pdf.exe
1308	msiexec.exe
1308	msiexec.exe

description	pid	process
Token: SeDebugPrivilege	3656	Invoice pdf.exe
Token: SeDebugPrivilege	3436	Invoice pdf.exe
Token: SeDebugPrivilege	1308	msiexec.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Invoice pdf.exeExplorer.EXEmsiexec.exe

description	pid	process	target process
PID 3656 wrote to memory of 412	3656	Invoice pdf.exe	schtasks.exe
PID 3656 wrote to memory of 412	3656	Invoice pdf.exe	schtasks.exe
PID 3656 wrote to memory of 412	3656	Invoice pdf.exe	schtasks.exe
PID 3656 wrote to memory of 3436	3656	Invoice pdf.exe	Invoice pdf.exe
PID 3656 wrote to memory of 3436	3656	Invoice pdf.exe	Invoice pdf.exe
PID 3656 wrote to memory of 3436	3656	Invoice pdf.exe	Invoice pdf.exe
PID 3656 wrote to memory of 3436	3656	Invoice pdf.exe	Invoice pdf.exe
PID 3656 wrote to memory of 3436	3656	Invoice pdf.exe	Invoice pdf.exe
PID 3656 wrote to memory of 3436	3656	Invoice pdf.exe	Invoice pdf.exe
PID 3040 wrote to memory of 1308	3040	Explorer.EXE	msiexec.exe
PID 3040 wrote to memory of 1308	3040	Explorer.EXE	msiexec.exe
PID 3040 wrote to memory of 1308	3040	Explorer.EXE	msiexec.exe
PID 1308 wrote to memory of 3960	1308	msiexec.exe	cmd.exe
PID 1308 wrote to memory of 3960	1308	msiexec.exe	cmd.exe
PID 1308 wrote to memory of 3960	1308	msiexec.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3040

C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3656

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gXUZJVkFviCTU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB5D4.tmp"
3⤵
- Creates scheduled task(s)
PID:412

C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3436

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:1308

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
3⤵
PID:3960

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB5D4.tmp
MD5
866d9e36ff8786b19bd8b20acb3d5774

SHA1
54f6abc84743f6c19f54fc9b6a30b00e7cad1fa2

SHA256
010a1ac25c5f3ba8bfc0d69a5c63678c88a287e9ba55f24a608bd7594b667820

SHA512
32f1471ad44daea73444ebf3a220afde33ea11d44866cc28ed564496ec140204b71e2ab554d6f8727152e8dc97336d35a352c3a129552f5615ebfa98263d2382

Download Submit
memory/412-116-0x0000000000000000-mapping.dmp

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memory/1308-124-0x0000000000000000-mapping.dmp

Download
memory/1308-131-0x0000000004E80000-0x0000000004F13000-memory.dmp

Filesize
588KB

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memory/1308-129-0x0000000005010000-0x0000000005330000-memory.dmp

Filesize
3.1MB

Download
memory/1308-128-0x0000000000E60000-0x0000000000E8E000-memory.dmp

Filesize
184KB

Download
memory/1308-127-0x0000000000FE0000-0x0000000000FF2000-memory.dmp

Filesize
72KB

Download
memory/3040-123-0x0000000003280000-0x000000000333B000-memory.dmp

Filesize
748KB

Download
memory/3040-132-0x0000000006870000-0x0000000006918000-memory.dmp

Filesize
672KB

Download
memory/3436-122-0x00000000016D0000-0x00000000016E4000-memory.dmp

Filesize
80KB

Download
memory/3436-121-0x0000000001770000-0x0000000001A90000-memory.dmp

Filesize
3.1MB

Download
memory/3436-119-0x000000000041EAC0-mapping.dmp

Download
memory/3436-118-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3656-114-0x00000000026C0000-0x00000000026C1000-memory.dmp

Filesize
4KB

Download
memory/3656-115-0x000000007F0E0000-0x000000007F0E1000-memory.dmp

Filesize
4KB

Download
memory/3960-130-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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