formbook | bfa5c7ef6ac526946d60e2ebcb22c2f9e3ffeec8c9d42bc6d54a6d3373815034

General

Target
TAX INVOICE pdf.exe
Size 824KB
Sample210412-blapt17s1s
SHA256 bfa5c7ef6ac526946d60e2ebcb22c2f9e3ffeec8c9d42bc6d54a6d3373815034
MD5 967f1d16bade2332af66c593e15e9882
SHA1 60b1b0e0936d9bed5f41227b988b9a19e8c34f1d
SHA512 f1eff306ba31b85047c89fa49c8ba18ab6b5b8f5573a07c74fced4eee437d7a5ef8856d1ecdf15ebefe625f422f6ccdc3cd5ca7afe5d1de27c1a46b698872d9c
MD5 SHA1 SHA512

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

resource	yara_rule
behavioral1/memory/576-66-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/576-67-0x000000000041EAC0-mapping.dmp	formbook
behavioral1/memory/1708-76-0x0000000000110000-0x000000000013E000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
1560	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 684 set thread context of 576	684	TAX INVOICE pdf.exe	31
PID 576 set thread context of 1252	576	TAX INVOICE pdf.exe	14
PID 1708 set thread context of 1252	1708	rundll32.exe	14

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

pid	Process
464	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
684	TAX INVOICE pdf.exe
684	TAX INVOICE pdf.exe
576	TAX INVOICE pdf.exe
576	TAX INVOICE pdf.exe
1708	rundll32.exe
1708	rundll32.exe
1708	rundll32.exe
1708	rundll32.exe
1708	rundll32.exe
1708	rundll32.exe
1708	rundll32.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
576	TAX INVOICE pdf.exe
576	TAX INVOICE pdf.exe
576	TAX INVOICE pdf.exe
1708	rundll32.exe
1708	rundll32.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	684	TAX INVOICE pdf.exe
Token: SeDebugPrivilege	576	TAX INVOICE pdf.exe
Token: SeDebugPrivilege	1708	rundll32.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 684 wrote to memory of 464	684	TAX INVOICE pdf.exe	29
PID 684 wrote to memory of 464	684	TAX INVOICE pdf.exe	29
PID 684 wrote to memory of 464	684	TAX INVOICE pdf.exe	29
PID 684 wrote to memory of 464	684	TAX INVOICE pdf.exe	29
PID 684 wrote to memory of 576	684	TAX INVOICE pdf.exe	31
PID 684 wrote to memory of 576	684	TAX INVOICE pdf.exe	31
PID 684 wrote to memory of 576	684	TAX INVOICE pdf.exe	31
PID 684 wrote to memory of 576	684	TAX INVOICE pdf.exe	31
PID 684 wrote to memory of 576	684	TAX INVOICE pdf.exe	31
PID 684 wrote to memory of 576	684	TAX INVOICE pdf.exe	31
PID 684 wrote to memory of 576	684	TAX INVOICE pdf.exe	31
PID 1252 wrote to memory of 1708	1252	Explorer.EXE	32
PID 1252 wrote to memory of 1708	1252	Explorer.EXE	32
PID 1252 wrote to memory of 1708	1252	Explorer.EXE	32
PID 1252 wrote to memory of 1708	1252	Explorer.EXE	32
PID 1252 wrote to memory of 1708	1252	Explorer.EXE	32
PID 1252 wrote to memory of 1708	1252	Explorer.EXE	32
PID 1252 wrote to memory of 1708	1252	Explorer.EXE	32
PID 1708 wrote to memory of 1560	1708	rundll32.exe	33
PID 1708 wrote to memory of 1560	1708	rundll32.exe	33
PID 1708 wrote to memory of 1560	1708	rundll32.exe	33
PID 1708 wrote to memory of 1560	1708	rundll32.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1252
- C:\Users\Admin\AppData\Local\Temp\TAX INVOICE pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\TAX INVOICE pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:684
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QQIYNHm" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBD3.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:464
- - C:\Users\Admin\AppData\Local\Temp\TAX INVOICE pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\TAX INVOICE pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:576
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\SysWOW64\rundll32.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1708
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\TAX INVOICE pdf.exe"
    3⤵
    - Deletes itself
    PID:1560

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

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Downloads

memory/576-69-0x0000000000870000-0x0000000000B73000-memory.dmp

Download

memory/576-70-0x0000000000280000-0x0000000000294000-memory.dmp

Download

memory/576-66-0x0000000000400000-0x000000000042E000-memory.dmp

Download

memory/684-61-0x0000000001E90000-0x0000000001E91000-memory.dmp

Download

memory/684-62-0x0000000001E91000-0x0000000001E92000-memory.dmp

Download

memory/684-60-0x0000000075C71000-0x0000000075C73000-memory.dmp

Download

memory/684-63-0x000000007EF50000-0x000000007EF51000-memory.dmp

Download

memory/1252-71-0x0000000004A40000-0x0000000004B02000-memory.dmp

Download

memory/1252-79-0x0000000004B10000-0x0000000004C3E000-memory.dmp

Download

memory/1708-75-0x0000000000470000-0x000000000047E000-memory.dmp

Download

memory/1708-76-0x0000000000110000-0x000000000013E000-memory.dmp

Download

memory/1708-77-0x0000000002120000-0x0000000002423000-memory.dmp

Download

memory/1708-78-0x0000000001EF0000-0x0000000001F83000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads