formbook | 9c36e836116772df22669a1d5e2af11e49cd8425e730b457f5d6979ca6d00dae

General

Target

$PLUGINSDIR/iewybf.dll
Size

29KB
MD5

4256ddc7ba4f2ab39fb28f081e870cfa
SHA1

8c1f0f6e94b68510bbffbf81143c5f26ebd913b6
SHA256

d519f718eca42250c87657b679a8a9d1766d331e6ee242d18bd739998bf44350
SHA512

a71ac74ad9d95c6b755858b0a75beaa3ec26e20eca252445a2d1541156d96bd39e39c30daa5eda28bafe8de2e2d67c2c70b25dce6b7f38f4ac0a0dfa60599c1a
SSDEEP

768:ubYYsBQJDh7wN4Ce10NUW5gPO8P9MOVAiTtm/MNJ:+IBQJDPGgPO8P9vAVm

Score

10^/10

formbook bkye discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

bkye

Decoy

lawnandgardenzone.com

eazymoneyindia.com

macroscopicsystem.com

aocsw.com

maisonetjardinltd.com

khadijahtv.com

shashameneland.com

kildebasen.com

lovetxts.com

easycompanyarmory.com

surviveit.info

greenterra.solutions

ushergiving.com

stickyickybakery.com

pyesquard.com

dailyinformerblog.com

thekimchilife.com

rainbow-bm.com

bosonetwork.com

bestacnetreatmentever.com

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral3/memory/2028-1-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral3/memory/2028-6-0x0000000000400000-0x000000000042E000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2504 set thread context of 2028	2504	rundll32.exe	32
PID 2028 set thread context of 1204	2028	rundll32.exe	21
PID 2112 set thread context of 1204	2112	svchost.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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2028	rundll32.exe
2028	rundll32.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe
2112	svchost.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2028	rundll32.exe
2028	rundll32.exe
2028	rundll32.exe
2112	svchost.exe
2112	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2028	rundll32.exe
Token: SeDebugPrivilege	2112	svchost.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2332 wrote to memory of 2504	2332	rundll32.exe	31
PID 2332 wrote to memory of 2504	2332	rundll32.exe	31
PID 2332 wrote to memory of 2504	2332	rundll32.exe	31
PID 2332 wrote to memory of 2504	2332	rundll32.exe	31
PID 2332 wrote to memory of 2504	2332	rundll32.exe	31
PID 2332 wrote to memory of 2504	2332	rundll32.exe	31
PID 2332 wrote to memory of 2504	2332	rundll32.exe	31
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 2504 wrote to memory of 2028	2504	rundll32.exe	32
PID 1204 wrote to memory of 2112	1204	Explorer.EXE	33
PID 1204 wrote to memory of 2112	1204	Explorer.EXE	33
PID 1204 wrote to memory of 2112	1204	Explorer.EXE	33
PID 1204 wrote to memory of 2112	1204	Explorer.EXE	33
PID 2112 wrote to memory of 1804	2112	svchost.exe	34
PID 2112 wrote to memory of 1804	2112	svchost.exe	34
PID 2112 wrote to memory of 1804	2112	svchost.exe	34
PID 2112 wrote to memory of 1804	2112	svchost.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1204
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\iewybf.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2332
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\iewybf.dll,#1
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2504
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\iewybf.dll,#1
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2028
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\SysWOW64\svchost.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:2112
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1804

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/1204-7-0x0000000006AF0000-0x0000000006C37000-memory.dmp

Filesize
1.3MB

Download
memory/1204-11-0x0000000006AF0000-0x0000000006C37000-memory.dmp

Filesize
1.3MB

Download
memory/2028-1-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2028-4-0x00000000020A0000-0x00000000023A3000-memory.dmp

Filesize
3.0MB

Download
memory/2028-6-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2028-5-0x00000000001A0000-0x00000000001B4000-memory.dmp

Filesize
80KB

Download
memory/2112-9-0x00000000008E0000-0x00000000008E8000-memory.dmp

Filesize
32KB

Download
memory/2112-8-0x00000000008E0000-0x00000000008E8000-memory.dmp

Filesize
32KB

Download
memory/2504-0-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/2504-2-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download

Analysis

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