formbook | 01fa11bf9cf821372575e12496a281db3c0edd99043f5a30351f218380028c79

General

Target

igfx.exe
Size

411KB
MD5

58af2905bb3afbf26a18d4dbff6af451
SHA1

15b21c2753b658b90ae652d82dd2123daf5af305
SHA256

c23c53452c3180e79ca639a79a2dc1ea8e3d8fbf4833e02e4ac02959dcfce486
SHA512

1f2a73881b9950d2f2ce6ee57c75782fc30335a402c1d555fcd97082f7e43dc6d14fc584f5deb156d99421b036227748adecc9e42671e2baea382b68adcc9e79
SSDEEP

6144:rweEDPVVGng08cErJGSovljhvXoFDkBTeI2+LJdSdMh4:o2tlgGxjhvqD43dSdi4

Score

10^/10

formbook wh23 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

wh23

Decoy

ow9vyvfee.com

alvis.one

mutantgobz.claims

plynofon.com

southofkingst.store

nuvidamedspa.com

coffeeforyou56.com

opaletechevents.com

momobar.life

abcmousu.com

learnicd-11.com

tipokin.xyz

kahvezevki.com

suratdimond.com

oldartists.best

infoepic.info

mattresslabo.com

skarlmotors.com

cl9319x.xyz

med49app.net

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/3032-15-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/3032-19-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/3032-24-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2564-31-0x00000000000F0000-0x000000000011F000-memory.dmp	formbook

Executes dropped EXE 2 IoCs

pid	Process
2200	iwszswbfva.exe
3032	iwszswbfva.exe

Loads dropped DLL 3 IoCs

pid	Process
1040	igfx.exe
1040	igfx.exe
2200	iwszswbfva.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2200 set thread context of 3032	2200	iwszswbfva.exe	30
PID 3032 set thread context of 1364	3032	iwszswbfva.exe	21
PID 3032 set thread context of 1364	3032	iwszswbfva.exe	21
PID 2564 set thread context of 1364	2564	cmstp.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 5 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	igfx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iwszswbfva.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iwszswbfva.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmstp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
3032	iwszswbfva.exe
3032	iwszswbfva.exe
3032	iwszswbfva.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe
2564	cmstp.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
2200	iwszswbfva.exe
3032	iwszswbfva.exe
3032	iwszswbfva.exe
3032	iwszswbfva.exe
3032	iwszswbfva.exe
2564	cmstp.exe
2564	cmstp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	iwszswbfva.exe
Token: SeDebugPrivilege	2564	cmstp.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1040 wrote to memory of 2200	1040	igfx.exe	29
PID 1040 wrote to memory of 2200	1040	igfx.exe	29
PID 1040 wrote to memory of 2200	1040	igfx.exe	29
PID 1040 wrote to memory of 2200	1040	igfx.exe	29
PID 2200 wrote to memory of 3032	2200	iwszswbfva.exe	30
PID 2200 wrote to memory of 3032	2200	iwszswbfva.exe	30
PID 2200 wrote to memory of 3032	2200	iwszswbfva.exe	30
PID 2200 wrote to memory of 3032	2200	iwszswbfva.exe	30
PID 2200 wrote to memory of 3032	2200	iwszswbfva.exe	30
PID 3032 wrote to memory of 2564	3032	iwszswbfva.exe	31
PID 3032 wrote to memory of 2564	3032	iwszswbfva.exe	31
PID 3032 wrote to memory of 2564	3032	iwszswbfva.exe	31
PID 3032 wrote to memory of 2564	3032	iwszswbfva.exe	31
PID 3032 wrote to memory of 2564	3032	iwszswbfva.exe	31
PID 3032 wrote to memory of 2564	3032	iwszswbfva.exe	31
PID 3032 wrote to memory of 2564	3032	iwszswbfva.exe	31
PID 2564 wrote to memory of 2808	2564	cmstp.exe	32
PID 2564 wrote to memory of 2808	2564	cmstp.exe	32
PID 2564 wrote to memory of 2808	2564	cmstp.exe	32
PID 2564 wrote to memory of 2808	2564	cmstp.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1364
- C:\Users\Admin\AppData\Local\Temp\igfx.exe
  "C:\Users\Admin\AppData\Local\Temp\igfx.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1040
- - C:\Users\Admin\AppData\Local\Temp\iwszswbfva.exe
    "C:\Users\Admin\AppData\Local\Temp\iwszswbfva.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2200
  - - C:\Users\Admin\AppData\Local\Temp\iwszswbfva.exe
      "C:\Users\Admin\AppData\Local\Temp\iwszswbfva.exe"
      4⤵
      Executes dropped EXE
      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:3032
    - - C:\Windows\SysWOW64\cmstp.exe
        
        "C:\Windows\SysWOW64\cmstp.exe"
        5⤵
        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:2564
      - C:\Windows\SysWOW64\cmd.exe
        
        /c del "C:\Users\Admin\AppData\Local\Temp\iwszswbfva.exe"
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:2808

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\iwszswbfva.exe

Filesize
7KB

MD5
256173eb182e2853cbfa0590dfb0cb3a

SHA1
c8eadb0d069644a491368497e91d737e4dc41754

SHA256
15b35b8bd2d2e94f656e77a105e3ef99946b02c41d773d118ab0c64db578eb5d

SHA512
22e88b1ed25e5f8391497255a8bdc7ea1aef876f3f3c9547e334436d8f250c8cc5c45c344b79c7009d15c9556235086190bc2a3bfb637cd3eaa67824cea78af2

Download Submit
C:\Users\Admin\AppData\Local\Temp\thdyfjwld.ma

Filesize
185KB

MD5
4cad14a76a186d4cb6eed65b46cdb9a7

SHA1
13b14c663730e14ada3f47144399c7f4fc9ae664

SHA256
3292eadd21b9a72d96c9d31118c845a543dc7bcdb073f634cbb2f15e9fcc05d8

SHA512
87bb6f37570ce816c3519b8fca750b3137a40310f35c20c5ee08682cda6eb69ac85df0ddc9d5e1f0956202caf93990e0846d00ffc78cb97c1f85a1fc006a1f75

Download Submit
C:\Users\Admin\AppData\Local\Temp\vprrhkviti.bit

Filesize
5KB

MD5
3def4847de17afd854cb0a65b9d016a5

SHA1
0c62d8f3b6bdf84dc55f410135406fd506c8dee8

SHA256
40f78b65d517289aa1960c8a4fcd32381b850e2db4892fcfbbb601754c0b41a8

SHA512
f32dcbaa0643c501ec9124e7e1d98ed4644391119495296222a9501080977b622701a155522fefdaa0119bb969356830a7b98e66b2fd84da128f00a7f607bfb0

Download Submit
memory/1364-23-0x00000000074B0000-0x0000000007605000-memory.dmp

Filesize
1.3MB

Download
memory/1364-21-0x00000000074B0000-0x0000000007605000-memory.dmp

Filesize
1.3MB

Download
memory/1364-30-0x0000000007610000-0x0000000007774000-memory.dmp

Filesize
1.4MB

Download
memory/1364-26-0x0000000007610000-0x0000000007774000-memory.dmp

Filesize
1.4MB

Download
memory/2200-14-0x0000000000100000-0x0000000000102000-memory.dmp

Filesize
8KB

Download
memory/2564-31-0x00000000000F0000-0x000000000011F000-memory.dmp

Filesize
188KB

Download
memory/2564-27-0x0000000000EB0000-0x0000000000EC8000-memory.dmp

Filesize
96KB

Download
memory/2564-29-0x0000000000EB0000-0x0000000000EC8000-memory.dmp

Filesize
96KB

Download
memory/3032-15-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3032-24-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3032-25-0x00000000002D0000-0x00000000002E4000-memory.dmp

Filesize
80KB

Download
memory/3032-17-0x0000000000990000-0x0000000000C93000-memory.dmp

Filesize
3.0MB

Download
memory/3032-19-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3032-20-0x0000000000180000-0x0000000000194000-memory.dmp

Filesize
80KB

Download

Analysis

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