formbook | 33f782353f73f79b79a704b5a1e66c39eea8d06cd4196c74f5ec68ed40b372a7

General

Target

Oversea Sales Purchases..exe
Size

527KB
MD5

1fefd4454f760fd94bcec743b13e6c6b
SHA1

4caa024e1494738b1951f58ff382b3c1479be067
SHA256

e98fbae65e642aef0ad45e52f3154a698ad6274c13e1d13e444b40b4882727bf
SHA512

e68e6e2e973e0d323b6801f4ad380adaf655a09ce99deaf227fcb97a371929f832a5246e25ede75d076f756797e069a0ebc039ba1e5e079c8cda1abb5fa958a4
SSDEEP

12288:YPPKGTI6yju065y4ypCAervisF/gvz3d21BKoiqtD001SyZvXjQbaD6:4PxI1juT5yNpC9im/Ez3dsBd/C0

Score

10^/10

formbook a34b discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

a34b

Decoy

overse.biz

thecarths.com

bouw-service.net

xn--9kq93eezbv99d.com

rf-deer.com

cantas.site

prestizh-pol1.online

fxptjs.com

diarypedia.com

delawareescaperoom.com

ios-buscarbr.com

ahhcarina.com

queernurseconsultants.com

xycp6288.com

swamplilys.com

purposefulliving.site

rockverse.biz

assistantsincrypto.com

avantes.club

themuseumwithoutwalls.com

Signatures

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

Formbook payload 4 IoCs

rat

resource	yara_rule
behavioral1/memory/2724-13-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2724-17-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2724-21-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2892-27-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
2664	cmd.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 620 set thread context of 2724	620	Oversea Sales Purchases..exe	31
PID 2724 set thread context of 1204	2724	Oversea Sales Purchases..exe	21
PID 2724 set thread context of 1204	2724	Oversea Sales Purchases..exe	21
PID 2892 set thread context of 1204	2892	wlanext.exe	21

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	Oversea Sales Purchases..exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wlanext.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2724	Oversea Sales Purchases..exe
2724	Oversea Sales Purchases..exe
2724	Oversea Sales Purchases..exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe
2892	wlanext.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2724	Oversea Sales Purchases..exe
2724	Oversea Sales Purchases..exe
2724	Oversea Sales Purchases..exe
2724	Oversea Sales Purchases..exe
2892	wlanext.exe
2892	wlanext.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2724	Oversea Sales Purchases..exe
Token: SeDebugPrivilege	2892	wlanext.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 620 wrote to memory of 2724	620	Oversea Sales Purchases..exe	31
PID 620 wrote to memory of 2724	620	Oversea Sales Purchases..exe	31
PID 620 wrote to memory of 2724	620	Oversea Sales Purchases..exe	31
PID 620 wrote to memory of 2724	620	Oversea Sales Purchases..exe	31
PID 620 wrote to memory of 2724	620	Oversea Sales Purchases..exe	31
PID 620 wrote to memory of 2724	620	Oversea Sales Purchases..exe	31
PID 620 wrote to memory of 2724	620	Oversea Sales Purchases..exe	31
PID 1204 wrote to memory of 2892	1204	Explorer.EXE	32
PID 1204 wrote to memory of 2892	1204	Explorer.EXE	32
PID 1204 wrote to memory of 2892	1204	Explorer.EXE	32
PID 1204 wrote to memory of 2892	1204	Explorer.EXE	32
PID 2892 wrote to memory of 2664	2892	wlanext.exe	33
PID 2892 wrote to memory of 2664	2892	wlanext.exe	33
PID 2892 wrote to memory of 2664	2892	wlanext.exe	33
PID 2892 wrote to memory of 2664	2892	wlanext.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1204
- C:\Users\Admin\AppData\Local\Temp\Oversea Sales Purchases..exe
  "C:\Users\Admin\AppData\Local\Temp\Oversea Sales Purchases..exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:620
- - C:\Users\Admin\AppData\Local\Temp\Oversea Sales Purchases..exe
    "C:\Users\Admin\AppData\Local\Temp\Oversea Sales Purchases..exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2724
- C:\Windows\SysWOW64\wlanext.exe
  "C:\Windows\SysWOW64\wlanext.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:2892
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Oversea Sales Purchases..exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2664

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

Replay Monitor

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Downloads

memory/620-14-0x0000000074270000-0x000000007495E000-memory.dmp

Filesize
6.9MB

Download
memory/620-1-0x0000000000E30000-0x0000000000EBA000-memory.dmp

Filesize
552KB

Download
memory/620-2-0x0000000074270000-0x000000007495E000-memory.dmp

Filesize
6.9MB

Download
memory/620-3-0x0000000000440000-0x000000000044A000-memory.dmp

Filesize
40KB

Download
memory/620-4-0x000000007427E000-0x000000007427F000-memory.dmp

Filesize
4KB

Download
memory/620-5-0x0000000074270000-0x000000007495E000-memory.dmp

Filesize
6.9MB

Download
memory/620-6-0x0000000000690000-0x00000000006F8000-memory.dmp

Filesize
416KB

Download
memory/620-0-0x000000007427E000-0x000000007427F000-memory.dmp

Filesize
4KB

Download
memory/1204-23-0x0000000004F20000-0x0000000005061000-memory.dmp

Filesize
1.3MB

Download
memory/1204-19-0x0000000004F20000-0x0000000005061000-memory.dmp

Filesize
1.3MB

Download
memory/1204-28-0x0000000005070000-0x0000000005176000-memory.dmp

Filesize
1.0MB

Download
memory/1204-24-0x0000000005070000-0x0000000005176000-memory.dmp

Filesize
1.0MB

Download
memory/2724-15-0x0000000000AE0000-0x0000000000DE3000-memory.dmp

Filesize
3.0MB

Download
memory/2724-17-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2724-18-0x0000000000140000-0x0000000000154000-memory.dmp

Filesize
80KB

Download
memory/2724-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2724-22-0x00000000001D0000-0x00000000001E4000-memory.dmp

Filesize
80KB

Download
memory/2724-13-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2724-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2724-21-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2724-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2892-26-0x0000000000C30000-0x0000000000C46000-memory.dmp

Filesize
88KB

Download
memory/2892-25-0x0000000000C30000-0x0000000000C46000-memory.dmp

Filesize
88KB

Download
memory/2892-27-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download

Analysis

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