formbook | abb82e829e69a97f46c6a116d8c8996697508b9215bb3b2facac37156c4062d0

Analysis

max time kernel
150s
max time network
117s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
06-01-2025 07:56

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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

resource	yara_rule
behavioral3/memory/1808-1-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral3/memory/1808-4-0x0000000000400000-0x000000000042E000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1692 set thread context of 1808	1692	rundll32.exe	31
PID 1808 set thread context of 1208	1808	rundll32.exe	21
PID 2200 set thread context of 1208	2200	rundll32.exe	21

System Location Discovery: System Language Discovery 1 TTPs 4 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	rundll32.exe
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	cmd.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
1808	rundll32.exe
1808	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1808	rundll32.exe
1808	rundll32.exe
1808	rundll32.exe
2200	rundll32.exe
2200	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1808	rundll32.exe
Token: SeDebugPrivilege	2200	rundll32.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1796 wrote to memory of 1692	1796	rundll32.exe	30
PID 1796 wrote to memory of 1692	1796	rundll32.exe	30
PID 1796 wrote to memory of 1692	1796	rundll32.exe	30
PID 1796 wrote to memory of 1692	1796	rundll32.exe	30
PID 1796 wrote to memory of 1692	1796	rundll32.exe	30
PID 1796 wrote to memory of 1692	1796	rundll32.exe	30
PID 1796 wrote to memory of 1692	1796	rundll32.exe	30
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1692 wrote to memory of 1808	1692	rundll32.exe	31
PID 1208 wrote to memory of 2200	1208	Explorer.EXE	32
PID 1208 wrote to memory of 2200	1208	Explorer.EXE	32
PID 1208 wrote to memory of 2200	1208	Explorer.EXE	32
PID 1208 wrote to memory of 2200	1208	Explorer.EXE	32
PID 1208 wrote to memory of 2200	1208	Explorer.EXE	32
PID 1208 wrote to memory of 2200	1208	Explorer.EXE	32
PID 1208 wrote to memory of 2200	1208	Explorer.EXE	32
PID 2200 wrote to memory of 844	2200	rundll32.exe	34
PID 2200 wrote to memory of 844	2200	rundll32.exe	34
PID 2200 wrote to memory of 844	2200	rundll32.exe	34
PID 2200 wrote to memory of 844	2200	rundll32.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1208
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\gtlbztpsztf.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1796
- - 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:1692
  - - 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:1808
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\SysWOW64\rundll32.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2200
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1208-6-0x0000000003C20000-0x0000000003D20000-memory.dmp

Filesize
1024KB

Download
memory/1208-7-0x00000000065F0000-0x00000000066BE000-memory.dmp

Filesize
824KB

Download
memory/1208-12-0x00000000065F0000-0x00000000066BE000-memory.dmp

Filesize
824KB

Download
memory/1692-0-0x00000000753AC000-0x00000000753AE000-memory.dmp

Filesize
8KB

Download
memory/1808-1-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1808-4-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1808-5-0x0000000000180000-0x0000000000194000-memory.dmp

Filesize
80KB

Download
memory/1808-2-0x0000000000A80000-0x0000000000D83000-memory.dmp

Filesize
3.0MB

Download
memory/2200-11-0x0000000000E60000-0x0000000000E6E000-memory.dmp

Filesize
56KB

Download
memory/2200-9-0x0000000000E60000-0x0000000000E6E000-memory.dmp

Filesize
56KB

Download
memory/2200-8-0x0000000000E60000-0x0000000000E6E000-memory.dmp

Filesize
56KB

Download