formbook | ad43937eb3ac4cfd6bd460642102eafdd1d2007bdbd369e3db624613284c325c

General

Target

$PLUGINSDIR/gtlbztpsztf.dll
Size

49KB
MD5

6432c43cc5cb60bb4a484470e8693ab3
SHA1

78f0e1e34dbee0fee48d70949ff07deef94215bc
SHA256

e21a1e1f87a1c05b1c97688f72fce20e5f1c42f8579b49d189b3e06f3be8a735
SHA512

760c3906675ca690b23e195a7b4c295289dc6242e096ca3140fc199e41474fff7df0500243bde937e4e5ab311d2c4969f02b8b3d87b97bd26d3c3feee5a5ef6e
SSDEEP

768:M57MzH3v2IihsP+l1nrk2IJ1/95UrpRxKZfUJXeykaxLT+QZv6qCGb:M57ohP+l1rktZ5qpWZf0XeyVxDd6/Gb

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

Processes:

resource	yara_rule
behavioral3/memory/2408-1-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral3/memory/2408-4-0x0000000000400000-0x000000000042E000-memory.dmp	formbook

Suspicious use of SetThreadContext 2 IoCs

Processes:

rundll32.exerundll32.exe

description	pid	process	target process
PID 1508 set thread context of 2408	1508	rundll32.exe	rundll32.exe
PID 2408 set thread context of 1120	2408	rundll32.exe	Explorer.EXE

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2700 2816 WerFault.exe msiexec.exe

pid	pid_target	process	target process
2700	2816	WerFault.exe	msiexec.exe

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

Processes:

rundll32.exerundll32.exemsiexec.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

2408 rundll32.exe
2408 rundll32.exe
Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

rundll32.exe

pid process

2408 rundll32.exe
2408 rundll32.exe
2408 rundll32.exe

pid	process
2408	rundll32.exe
2408	rundll32.exe

pid	process
2408	rundll32.exe
2408	rundll32.exe
2408	rundll32.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

rundll32.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	2408	rundll32.exe
Token: SeShutdownPrivilege	1120	Explorer.EXE
Token: SeShutdownPrivilege	1120	Explorer.EXE
Token: SeShutdownPrivilege	1120	Explorer.EXE

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

rundll32.exerundll32.exeExplorer.EXEmsiexec.exe

description	pid	process	target process
PID 3056 wrote to memory of 1508	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 1508	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 1508	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 1508	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 1508	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 1508	3056	rundll32.exe	rundll32.exe
PID 3056 wrote to memory of 1508	3056	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1508 wrote to memory of 2408	1508	rundll32.exe	rundll32.exe
PID 1120 wrote to memory of 2816	1120	Explorer.EXE	msiexec.exe
PID 1120 wrote to memory of 2816	1120	Explorer.EXE	msiexec.exe
PID 1120 wrote to memory of 2816	1120	Explorer.EXE	msiexec.exe
PID 1120 wrote to memory of 2816	1120	Explorer.EXE	msiexec.exe
PID 1120 wrote to memory of 2816	1120	Explorer.EXE	msiexec.exe
PID 1120 wrote to memory of 2816	1120	Explorer.EXE	msiexec.exe
PID 1120 wrote to memory of 2816	1120	Explorer.EXE	msiexec.exe
PID 2816 wrote to memory of 2700	2816	msiexec.exe	WerFault.exe
PID 2816 wrote to memory of 2700	2816	msiexec.exe	WerFault.exe
PID 2816 wrote to memory of 2700	2816	msiexec.exe	WerFault.exe
PID 2816 wrote to memory of 2700	2816	msiexec.exe	WerFault.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1120
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\gtlbztpsztf.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3056
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\gtlbztpsztf.dll,#1
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1508
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\gtlbztpsztf.dll,#1
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2408
- C:\Windows\SysWOW64\msiexec.exe
  "C:\Windows\SysWOW64\msiexec.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2816
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2816 -s 268
    3⤵
    - Program crash
    PID:2700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1120-6-0x0000000000010000-0x0000000000020000-memory.dmp

Filesize
64KB

Download
memory/1120-7-0x00000000067B0000-0x0000000006938000-memory.dmp

Filesize
1.5MB

Download
memory/1120-14-0x00000000067B0000-0x0000000006938000-memory.dmp

Filesize
1.5MB

Download
memory/1508-0-0x0000000074ADC000-0x0000000074ADE000-memory.dmp

Filesize
8KB

Download
memory/2408-1-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2408-2-0x0000000002060000-0x0000000002363000-memory.dmp

Filesize
3.0MB

Download
memory/2408-4-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2408-5-0x0000000000130000-0x0000000000144000-memory.dmp

Filesize
80KB

Download
memory/2816-9-0x0000000000E30000-0x0000000000E44000-memory.dmp

Filesize
80KB

Download
memory/2816-8-0x0000000000E30000-0x0000000000E44000-memory.dmp

Filesize
80KB

Download
memory/2816-11-0x0000000000E30000-0x0000000000E44000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads