formbook | da8700a12e72aab723d9939d71a36df7a40c53a4f11f3d5ce48e4173d8cdf746

General

Target

G-77904DOC.exe
Size

300KB
MD5

e133504aa7c92bcc8b358abfa4c36a20
SHA1

68a3dc52c35115003d74c224dfc3f9e95bd00c04
SHA256

58a064152959df9f0b10cb78b8cdcda6eae112619a7239ddc0c18547e7e3a598
SHA512

98b75db2b869e910565321e829689366be7f319cf6f3aaaac65d06a36b6985cbdec0e16261bfeb0f93b8a48d5b1c707ef28deb84430ccb738dff0699a3a5fd60
SSDEEP

6144:rGiwlK7jQRnqGFYtTJJr3+WZmHXH0CNK0d2Rr+oGJyRt1sy2:QcQxYtTbr1Z4/XZMwy2

Score

10^/10

formbook bs11 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

bs11

Decoy

momentumcs.net

gifabricaciones.com

handwerks.design

kalviuniv.com

saatiin.com

anthonyjoelquezada.com

fantasticphoto.sbs

lifespanvisiontherapeutics.com

cameliaandco.com

loftycryphigh.com

webtrajpylive.online

perlerpalace.com

annemacedonia.com

oakandorange.com

arslantrader.com

nanhajim.com

ursula.biz

onlinebusiness.today

shishkin-grow.space

whoami.zone

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
behavioral1/memory/3068-12-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/3068-16-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/3044-21-0x00000000000C0000-0x00000000000EF000-memory.dmp	formbook

Executes dropped EXE 2 IoCs

pid	Process
2876	gavvjlio.exe
3068	gavvjlio.exe

Loads dropped DLL 2 IoCs

pid	Process
2776	G-77904DOC.exe
2876	gavvjlio.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2876 set thread context of 3068	2876	gavvjlio.exe	31
PID 3068 set thread context of 1188	3068	gavvjlio.exe	21
PID 3044 set thread context of 1188	3044	systray.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 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	systray.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	G-77904DOC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gavvjlio.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
3068	gavvjlio.exe
3068	gavvjlio.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe
3044	systray.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
3068	gavvjlio.exe
3068	gavvjlio.exe
3068	gavvjlio.exe
3044	systray.exe
3044	systray.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	gavvjlio.exe
Token: SeDebugPrivilege	3044	systray.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2776 wrote to memory of 2876	2776	G-77904DOC.exe	30
PID 2776 wrote to memory of 2876	2776	G-77904DOC.exe	30
PID 2776 wrote to memory of 2876	2776	G-77904DOC.exe	30
PID 2776 wrote to memory of 2876	2776	G-77904DOC.exe	30
PID 2876 wrote to memory of 3068	2876	gavvjlio.exe	31
PID 2876 wrote to memory of 3068	2876	gavvjlio.exe	31
PID 2876 wrote to memory of 3068	2876	gavvjlio.exe	31
PID 2876 wrote to memory of 3068	2876	gavvjlio.exe	31
PID 2876 wrote to memory of 3068	2876	gavvjlio.exe	31
PID 2876 wrote to memory of 3068	2876	gavvjlio.exe	31
PID 2876 wrote to memory of 3068	2876	gavvjlio.exe	31
PID 1188 wrote to memory of 3044	1188	Explorer.EXE	32
PID 1188 wrote to memory of 3044	1188	Explorer.EXE	32
PID 1188 wrote to memory of 3044	1188	Explorer.EXE	32
PID 1188 wrote to memory of 3044	1188	Explorer.EXE	32
PID 3044 wrote to memory of 1736	3044	systray.exe	33
PID 3044 wrote to memory of 1736	3044	systray.exe	33
PID 3044 wrote to memory of 1736	3044	systray.exe	33
PID 3044 wrote to memory of 1736	3044	systray.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1188
- C:\Users\Admin\AppData\Local\Temp\G-77904DOC.exe
  "C:\Users\Admin\AppData\Local\Temp\G-77904DOC.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2776
- - C:\Users\Admin\AppData\Local\Temp\gavvjlio.exe
    C:\Users\Admin\AppData\Local\Temp\gavvjlio.exe C:\Users\Admin\AppData\Local\Temp\rudvuunoky
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2876
  - - C:\Users\Admin\AppData\Local\Temp\gavvjlio.exe
      C:\Users\Admin\AppData\Local\Temp\gavvjlio.exe C:\Users\Admin\AppData\Local\Temp\rudvuunoky
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:3068
- C:\Windows\SysWOW64\systray.exe
  "C:\Windows\SysWOW64\systray.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:3044
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\gavvjlio.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

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\iker7dx2hyvtj44

Filesize
213KB

MD5
a9a514cd5d9c755b8319c055b0d6d06e

SHA1
5717539cbc2ab9a7c01443182abfa50bb0520694

SHA256
b53b25f3d0418c286e8d4c78fc4080ecd05f00bd6b39fa16241335bfc05670df

SHA512
82f9978685f9877e20b24dd60bb32b05c3c23b54275c107cb7017a15f5802d1540ef10709ae90de0b0cef83e32c57c66063aa1db8f8ef7a6708a40d352d7ecf5

Download Submit
C:\Users\Admin\AppData\Local\Temp\rudvuunoky

Filesize
4KB

MD5
cd2d9713ae5995ee2bf3af08d8eecc52

SHA1
c08cf6596eb17e3f52295cef79c51b67c86bf407

SHA256
ad332e48b605d4d44a205c3bc93414696b372e08efdb9d423b69452a04db9e67

SHA512
e3a5ce9c56ac429f6ab33c79b57580155173bdb9e2f010d952d32ee95e08db893004b6bf37e4665f112b3b2bb01210e71fb125a9772addbc9a9c985224ed3fb5

Download Submit
\Users\Admin\AppData\Local\Temp\gavvjlio.exe

Filesize
107KB

MD5
4f1abaead61fe7411fc7c6ee5082d665

SHA1
b4ad83dea14c06e0aa2c2ca582b52a527ec01d77

SHA256
e6b54e61fb080c3f6efb98d3ac8d182ad859fee863cc43478c99d3660bec6bd5

SHA512
e045f7094df1552776c1542edef3066663fcbfcf7dcd9bc871de273ce087c898aee583f603f34532d94e8ee22f86b550c736ab9232f72c2966cd62613dc5baab

Download Submit
memory/1188-18-0x0000000007460000-0x000000000760F000-memory.dmp

Filesize
1.7MB

Download
memory/1188-22-0x0000000007460000-0x000000000760F000-memory.dmp

Filesize
1.7MB

Download
memory/2876-9-0x00000000000F0000-0x00000000000F2000-memory.dmp

Filesize
8KB

Download
memory/3044-20-0x0000000000AF0000-0x0000000000AF5000-memory.dmp

Filesize
20KB

Download
memory/3044-19-0x0000000000AF0000-0x0000000000AF5000-memory.dmp

Filesize
20KB

Download
memory/3044-21-0x00000000000C0000-0x00000000000EF000-memory.dmp

Filesize
188KB

Download
memory/3068-17-0x0000000000180000-0x0000000000194000-memory.dmp

Filesize
80KB

Download
memory/3068-16-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3068-14-0x00000000008D0000-0x0000000000BD3000-memory.dmp

Filesize
3.0MB

Download
memory/3068-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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