formbook | 81706e1f6262ba7a58ae21da9cc923875e013db27a44f8bf5f944a0f635beb0f

General

Target

PO 211210-02B.exe
Size

1.0MB
MD5

4064e9b07c90788942f5d4ca84fe93dd
SHA1

9e7b93ea418d60a11d191a9d0a368d2880c2abb0
SHA256

98318bf03a710984e1eaa61e8fe1ceb1f78cefb0de3ee8168dff8e4b144d6b42
SHA512

067eb0ffeff7d61c3bf5b1cb8f28df9432f564d055b4a730573b37ce51aaaff9766b00aec072e3177b730ff3a4dbe635b1964fbb0667c713ec5a0e6c88a65f8e
SSDEEP

24576:qlEGxQTnyni55j63p5zpKeZJ6wprm0W7nNM5VtcYTPy0AiQmywV7Nt+bSp/l:qpxayniu3/tKeZZpr/W7wBTPHRQBYBtX

Score

10^/10

formbook kz21 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

kz21

Decoy

affordableshopper.com

federalpensioneducation.com

nguyenphuc.xyz

tbryantnotarysvcs.com

satgerv.online

yis.xyz

sailing-dreams.online

saairconditioners.com

compassioncommunity.net

vickyrubs.com

uniqueprorental.com

xplus-main.xyz

beforetravelthai.com

mentaltrainer.net

bianko.xyz

postsandnews.com

stream-king.com

citizen.guide

lasuiterennes.com

elektroexpress24.com

Signatures

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

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/3404-12-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3404-17-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3296-22-0x0000000000960000-0x000000000098F000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2520 set thread context of 3404	2520	PO 211210-02B.exe	91
PID 3404 set thread context of 3504	3404	PO 211210-02B.exe	56
PID 3296 set thread context of 3504	3296	chkdsk.exe	56

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	chkdsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO 211210-02B.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 48 IoCs

pid	Process
3404	PO 211210-02B.exe
3404	PO 211210-02B.exe
3404	PO 211210-02B.exe
3404	PO 211210-02B.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe
3296	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
3404	PO 211210-02B.exe
3404	PO 211210-02B.exe
3404	PO 211210-02B.exe
3296	chkdsk.exe
3296	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3404	PO 211210-02B.exe
Token: SeDebugPrivilege	3296	chkdsk.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 3404	2520	PO 211210-02B.exe	91
PID 2520 wrote to memory of 3404	2520	PO 211210-02B.exe	91
PID 2520 wrote to memory of 3404	2520	PO 211210-02B.exe	91
PID 2520 wrote to memory of 3404	2520	PO 211210-02B.exe	91
PID 2520 wrote to memory of 3404	2520	PO 211210-02B.exe	91
PID 2520 wrote to memory of 3404	2520	PO 211210-02B.exe	91
PID 3504 wrote to memory of 3296	3504	Explorer.EXE	92
PID 3504 wrote to memory of 3296	3504	Explorer.EXE	92
PID 3504 wrote to memory of 3296	3504	Explorer.EXE	92
PID 3296 wrote to memory of 1356	3296	chkdsk.exe	93
PID 3296 wrote to memory of 1356	3296	chkdsk.exe	93
PID 3296 wrote to memory of 1356	3296	chkdsk.exe	93

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3504
- C:\Users\Admin\AppData\Local\Temp\PO 211210-02B.exe
  "C:\Users\Admin\AppData\Local\Temp\PO 211210-02B.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2520
- - C:\Users\Admin\AppData\Local\Temp\PO 211210-02B.exe
    "C:\Users\Admin\AppData\Local\Temp\PO 211210-02B.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:3404
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3296
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\PO 211210-02B.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1356

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2520-6-0x0000000005920000-0x000000000592E000-memory.dmp

Filesize
56KB

Download
memory/2520-1-0x0000000000DF0000-0x0000000000F00000-memory.dmp

Filesize
1.1MB

Download
memory/2520-2-0x0000000005EF0000-0x0000000006494000-memory.dmp

Filesize
5.6MB

Download
memory/2520-3-0x0000000005940000-0x00000000059D2000-memory.dmp

Filesize
584KB

Download
memory/2520-4-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/2520-5-0x00000000058F0000-0x00000000058FA000-memory.dmp

Filesize
40KB

Download
memory/2520-14-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/2520-7-0x0000000005D20000-0x0000000005D6C000-memory.dmp

Filesize
304KB

Download
memory/2520-8-0x000000007486E000-0x000000007486F000-memory.dmp

Filesize
4KB

Download
memory/2520-9-0x0000000074860000-0x0000000075010000-memory.dmp

Filesize
7.7MB

Download
memory/2520-10-0x00000000089A0000-0x0000000008A3C000-memory.dmp

Filesize
624KB

Download
memory/2520-11-0x0000000008E50000-0x0000000008F76000-memory.dmp

Filesize
1.1MB

Download
memory/2520-0-0x000000007486E000-0x000000007486F000-memory.dmp

Filesize
4KB

Download
memory/3296-20-0x0000000000DB0000-0x0000000000DBA000-memory.dmp

Filesize
40KB

Download
memory/3296-21-0x0000000000DB0000-0x0000000000DBA000-memory.dmp

Filesize
40KB

Download
memory/3296-22-0x0000000000960000-0x000000000098F000-memory.dmp

Filesize
188KB

Download
memory/3404-15-0x0000000001940000-0x0000000001C8A000-memory.dmp

Filesize
3.3MB

Download
memory/3404-18-0x00000000018E0000-0x00000000018F5000-memory.dmp

Filesize
84KB

Download
memory/3404-17-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3404-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3504-19-0x0000000002A40000-0x0000000002B67000-memory.dmp

Filesize
1.2MB

Download
memory/3504-23-0x0000000002A40000-0x0000000002B67000-memory.dmp

Filesize
1.2MB

Download
memory/3504-27-0x0000000008940000-0x0000000008AC0000-memory.dmp

Filesize
1.5MB

Download
memory/3504-28-0x0000000008940000-0x0000000008AC0000-memory.dmp

Filesize
1.5MB

Download
memory/3504-30-0x0000000008940000-0x0000000008AC0000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing