formbook | f69821010916c746e5e371fcd011dda072fdfc09ac964e9db9506a97cec1fe3e

General

Target

inv300123.pdf.exe
Size

249KB
MD5

c1d715af9940a5e70e1ab58fecc18dba
SHA1

a223f8c86b1748e3f7bccccd13c864507505e09c
SHA256

3b49db8324bc576c3d9e31d4bd1c27af48f3ec36652b95991a3b4803c6a48ad8
SHA512

99fef3200ab3cf200a4d23ed95edbbc7005b856b599a2b832bedf9cb16ffc62dc6f5bc6c073a95e3f473b055621e4e022801c72ff4c0ab818253fdba59cafd53
SSDEEP

6144:wBlL/c/QkZXt5dYUpKdCASZEJsfgnv1KhsiGcO3:CezZJ7pDhZEJggnNceH3

Score

10^/10

formbook s3dy discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

s3dy

Decoy

ravlygte.info

marketnewsville.online

flooring-envy.com

flavourhouston.com

donghohanghieunam.com

globleitsolutions.com

digitalgraphicarts.com

cupidbeautybar.com

cannavybes.com

negative-dsp.com

littledali.com

meltwatersoftware.info

blackdogland.com

danasales.com

mississippiscorecard.com

mainesmoker.com

sirenxinlilzixun.com

tychehang.com

gentciu.com

weckloltd.com

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral1/memory/2380-9-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/2380-12-0x0000000000400000-0x000000000042E000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
2540	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
2416	inv300123.pdf.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2416 set thread context of 2380	2416	inv300123.pdf.exe	30
PID 2380 set thread context of 1208	2380	inv300123.pdf.exe	21
PID 2760 set thread context of 1208	2760	ipconfig.exe	21

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ipconfig.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	inv300123.pdf.exe

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2760	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2380	inv300123.pdf.exe
2380	inv300123.pdf.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe
2760	ipconfig.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2380	inv300123.pdf.exe
2380	inv300123.pdf.exe
2380	inv300123.pdf.exe
2760	ipconfig.exe
2760	ipconfig.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2380	inv300123.pdf.exe
Token: SeDebugPrivilege	2760	ipconfig.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 2380	2416	inv300123.pdf.exe	30
PID 2416 wrote to memory of 2380	2416	inv300123.pdf.exe	30
PID 2416 wrote to memory of 2380	2416	inv300123.pdf.exe	30
PID 2416 wrote to memory of 2380	2416	inv300123.pdf.exe	30
PID 2416 wrote to memory of 2380	2416	inv300123.pdf.exe	30
PID 2416 wrote to memory of 2380	2416	inv300123.pdf.exe	30
PID 2416 wrote to memory of 2380	2416	inv300123.pdf.exe	30
PID 1208 wrote to memory of 2760	1208	Explorer.EXE	31
PID 1208 wrote to memory of 2760	1208	Explorer.EXE	31
PID 1208 wrote to memory of 2760	1208	Explorer.EXE	31
PID 1208 wrote to memory of 2760	1208	Explorer.EXE	31
PID 2760 wrote to memory of 2540	2760	ipconfig.exe	32
PID 2760 wrote to memory of 2540	2760	ipconfig.exe	32
PID 2760 wrote to memory of 2540	2760	ipconfig.exe	32
PID 2760 wrote to memory of 2540	2760	ipconfig.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Users\Admin\AppData\Local\Temp\inv300123.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\inv300123.pdf.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2416
- - C:\Users\Admin\AppData\Local\Temp\inv300123.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\inv300123.pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2380
- C:\Windows\SysWOW64\ipconfig.exe
  "C:\Windows\SysWOW64\ipconfig.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Gathers network information
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2760
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\inv300123.pdf.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2540

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nst932C.tmp\nqdipsrotb.dll

Filesize
31KB

MD5
8ab953e111816f48fd4aab119809af53

SHA1
5ad3c9b13395ea5912bbff13746171a387f43979

SHA256
cb989078f012a4f8f8fe2b0ee20790a792dc6f1968cb0bba55f654ffb3346c20

SHA512
75b37e5fcc1994686eb91316ef45ec46e9ada54cbe985e9671c8e0d09a153ddb6bbfd2881dc278c6b351c6a022d1db6c33b6b7a7ce73b0eb4af5a84ca2e7e421

Download Submit
memory/1208-13-0x0000000004E00000-0x0000000004ED6000-memory.dmp

Filesize
856KB

Download
memory/1208-18-0x0000000004E00000-0x0000000004ED6000-memory.dmp

Filesize
856KB

Download
memory/2380-9-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2380-12-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2416-7-0x0000000074560000-0x000000007456B000-memory.dmp

Filesize
44KB

Download
memory/2416-10-0x0000000074560000-0x000000007456B000-memory.dmp

Filesize
44KB

Download
memory/2760-16-0x0000000000BF0000-0x0000000000BFA000-memory.dmp

Filesize
40KB

Download
memory/2760-17-0x0000000000BF0000-0x0000000000BFA000-memory.dmp

Filesize
40KB

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Analysis

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