formbook | 494b892495fb6f002fd36477446bfc59f686fe73710d55dc782de8512452e535

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/1176-118-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/1176-119-0x000000000041EAC0-mapping.dmp	formbook
behavioral2/memory/2080-126-0x0000000000960000-0x000000000098E000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

Processes:

Invoice pdf.exeInvoice pdf.exewlanext.exe

description	pid	process	target process
PID 796 set thread context of 1176	796	Invoice pdf.exe	Invoice pdf.exe
PID 1176 set thread context of 3024	1176	Invoice pdf.exe	Explorer.EXE
PID 2080 set thread context of 3024	2080	wlanext.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

1564 schtasks.exe

pid	process
1564	schtasks.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

Invoice pdf.exeInvoice pdf.exewlanext.exe

pid	process
796	Invoice pdf.exe
796	Invoice pdf.exe
796	Invoice pdf.exe
796	Invoice pdf.exe
1176	Invoice pdf.exe
1176	Invoice pdf.exe
1176	Invoice pdf.exe
1176	Invoice pdf.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe
2080	wlanext.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

Invoice pdf.exewlanext.exe

pid process

1176 Invoice pdf.exe
1176 Invoice pdf.exe
1176 Invoice pdf.exe
2080 wlanext.exe
2080 wlanext.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Invoice pdf.exeInvoice pdf.exewlanext.exe

description pid process

Token: SeDebugPrivilege 796 Invoice pdf.exe
Token: SeDebugPrivilege 1176 Invoice pdf.exe
Token: SeDebugPrivilege 2080 wlanext.exe

pid	process
1176	Invoice pdf.exe
1176	Invoice pdf.exe
1176	Invoice pdf.exe
2080	wlanext.exe
2080	wlanext.exe

description	pid	process
Token: SeDebugPrivilege	796	Invoice pdf.exe
Token: SeDebugPrivilege	1176	Invoice pdf.exe
Token: SeDebugPrivilege	2080	wlanext.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Invoice pdf.exeExplorer.EXEwlanext.exe

description	pid	process	target process
PID 796 wrote to memory of 1564	796	Invoice pdf.exe	schtasks.exe
PID 796 wrote to memory of 1564	796	Invoice pdf.exe	schtasks.exe
PID 796 wrote to memory of 1564	796	Invoice pdf.exe	schtasks.exe
PID 796 wrote to memory of 1176	796	Invoice pdf.exe	Invoice pdf.exe
PID 796 wrote to memory of 1176	796	Invoice pdf.exe	Invoice pdf.exe
PID 796 wrote to memory of 1176	796	Invoice pdf.exe	Invoice pdf.exe
PID 796 wrote to memory of 1176	796	Invoice pdf.exe	Invoice pdf.exe
PID 796 wrote to memory of 1176	796	Invoice pdf.exe	Invoice pdf.exe
PID 796 wrote to memory of 1176	796	Invoice pdf.exe	Invoice pdf.exe
PID 3024 wrote to memory of 2080	3024	Explorer.EXE	wlanext.exe
PID 3024 wrote to memory of 2080	3024	Explorer.EXE	wlanext.exe
PID 3024 wrote to memory of 2080	3024	Explorer.EXE	wlanext.exe
PID 2080 wrote to memory of 3940	2080	wlanext.exe	cmd.exe
PID 2080 wrote to memory of 3940	2080	wlanext.exe	cmd.exe
PID 2080 wrote to memory of 3940	2080	wlanext.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3024

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:796

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\gXUZJVkFviCTU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2CA9.tmp"
3⤵
- Creates scheduled task(s)
PID:1564

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:1176

C:\Windows\SysWOW64\wlanext.exe
"C:\Windows\SysWOW64\wlanext.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2080

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Invoice pdf.exe"
3⤵
PID:3940

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\tmp2CA9.tmp
MD5
25d997f10b981cee06e6a4c61f340459

SHA1
69a80086691ec17c5105b5c975171dab49ca4b40

SHA256
8bd26a03d59f2a918c40fc35faf713a2c6294149b1fdb0fa5f6ab06fc8287ee0

SHA512
cee61f586dada604129d4caf950f301d9f5f39a27f3675165b109f488f8f35cd2121ba24f20e98fa5fe3de4e0332baeb48b1b5a3b188aa00f4c400df10156eec

Download Submit
memory/796-115-0x000000007F920000-0x000000007F921000-memory.dmp

Filesize
4KB

Download
memory/796-114-0x0000000002C10000-0x0000000002C11000-memory.dmp

Filesize
4KB

Download
memory/1176-121-0x0000000001900000-0x0000000001C20000-memory.dmp

Filesize
3.1MB

Download
memory/1176-118-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1176-119-0x000000000041EAC0-mapping.dmp

Download
memory/1176-122-0x00000000017C0000-0x00000000017D4000-memory.dmp

Filesize
80KB

Download
memory/1564-116-0x0000000000000000-mapping.dmp

Download
memory/2080-127-0x0000000003310000-0x0000000003630000-memory.dmp

Filesize
3.1MB

Download
memory/2080-124-0x0000000000000000-mapping.dmp

Download
memory/2080-125-0x0000000000A10000-0x0000000000A27000-memory.dmp

Filesize
92KB

Download
memory/2080-126-0x0000000000960000-0x000000000098E000-memory.dmp

Filesize
184KB

Download
memory/2080-129-0x0000000003180000-0x0000000003213000-memory.dmp

Filesize
588KB

Download
memory/3024-123-0x0000000004DA0000-0x0000000004F03000-memory.dmp

Filesize
1.4MB

Download
memory/3024-130-0x0000000005E30000-0x0000000005F3F000-memory.dmp

Filesize
1.1MB

Download
memory/3940-128-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads