formbook | 5644b2a6b24189d3ffd6e90413150e01dc160e33a062e158f0ef50e0bd02e310

General

Target

DOC21AZ068G2022.exe
Size

258KB
MD5

868608b7e90e467edba786effe32dfea
SHA1

6de62b0cd19ddaad25b80ced29d35d80410d1ca4
SHA256

5644b2a6b24189d3ffd6e90413150e01dc160e33a062e158f0ef50e0bd02e310
SHA512

c5e76faaafb27d519933f50c3d3961943c29fe3c7e59b125a5fd08eec7f6acdcfbc4071661dae1d2b63216b9a417f2fdc9c674ac03a20ba05a17a1b4e5f34100
SSDEEP

6144:mbE/HUbk4BzCq3T0yLj6tV/SnSUp36J6fPy0nqFm:mb/xPz/nN188lnqc

Score

10^/10

formbook axe3 rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

axe3

Decoy

nV63ydJMXMf7memspIpnnVLl3Q==

uJ50rs5Y/80AqT79guHh

FcsTFQ1xekTgcal8G0P2ZTQ=

uLWWVJP++ID3dkoB8g==

YyoybGF5Fsa/UH8=

Tk4htwkBBfM5ZA==

QgJ8vN9f+uCdsD79guHh

wmjC9UuSBGyTrY5PAX9t1A==

Sw7JEwOKl576ndxw/A==

BOqs09Ikjej1BN98ZYtVfSi5xQ==

YA5cbH3/4wVAYg==

fRWIvatAXM3+t0X9guHh

FAbZXq/jFuaEq2YCwQh3b2oE

STL+RDTA652/tD/9guHh

zgLNcuX32aFB

WmgwW1UCJ/9Nc0ofkIhVyQ==

jiWgy9ckGh8G+3Q7Rl//NW9ZU7TU

JCoawiBkwAkeJOehkNXRCYnj3A==

WQDFZvang91P

zGrJ4CA2pAhR

Signatures

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

Blocklisted process makes network request 3 IoCs

flow	pid	Process
6	1696	cmstp.exe
15	1696	cmstp.exe
24	1696	cmstp.exe

Executes dropped EXE 1 IoCs

pid	Process
1960	mubeskgb.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Control Panel\International\Geo\Nation	mubeskgb.exe

Loads dropped DLL 4 IoCs

pid	Process
1972	DOC21AZ068G2022.exe
1960	mubeskgb.exe
1232	mubeskgb.exe
1696	cmstp.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1960 set thread context of 1232	1960	mubeskgb.exe	29
PID 1232 set thread context of 1404	1232	mubeskgb.exe	15
PID 1696 set thread context of 1404	1696	cmstp.exe	15

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-3845472200-3839195424-595303356-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

pid	Process
1232	mubeskgb.exe
1232	mubeskgb.exe
1232	mubeskgb.exe
1232	mubeskgb.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
1232	mubeskgb.exe
1232	mubeskgb.exe
1232	mubeskgb.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe
1696	cmstp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1232	mubeskgb.exe
Token: SeDebugPrivilege	1696	cmstp.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1404	Explorer.EXE
1404	Explorer.EXE

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
1404	Explorer.EXE
1404	Explorer.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1960	1972	DOC21AZ068G2022.exe	28
PID 1972 wrote to memory of 1960	1972	DOC21AZ068G2022.exe	28
PID 1972 wrote to memory of 1960	1972	DOC21AZ068G2022.exe	28
PID 1972 wrote to memory of 1960	1972	DOC21AZ068G2022.exe	28
PID 1960 wrote to memory of 1232	1960	mubeskgb.exe	29
PID 1960 wrote to memory of 1232	1960	mubeskgb.exe	29
PID 1960 wrote to memory of 1232	1960	mubeskgb.exe	29
PID 1960 wrote to memory of 1232	1960	mubeskgb.exe	29
PID 1960 wrote to memory of 1232	1960	mubeskgb.exe	29
PID 1404 wrote to memory of 1696	1404	Explorer.EXE	30
PID 1404 wrote to memory of 1696	1404	Explorer.EXE	30
PID 1404 wrote to memory of 1696	1404	Explorer.EXE	30
PID 1404 wrote to memory of 1696	1404	Explorer.EXE	30
PID 1404 wrote to memory of 1696	1404	Explorer.EXE	30
PID 1404 wrote to memory of 1696	1404	Explorer.EXE	30
PID 1404 wrote to memory of 1696	1404	Explorer.EXE	30
PID 1696 wrote to memory of 1040	1696	cmstp.exe	33
PID 1696 wrote to memory of 1040	1696	cmstp.exe	33
PID 1696 wrote to memory of 1040	1696	cmstp.exe	33
PID 1696 wrote to memory of 1040	1696	cmstp.exe	33
PID 1696 wrote to memory of 1040	1696	cmstp.exe	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Users\Admin\AppData\Local\Temp\DOC21AZ068G2022.exe
  "C:\Users\Admin\AppData\Local\Temp\DOC21AZ068G2022.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1972
- - C:\Users\Admin\AppData\Local\Temp\mubeskgb.exe
    "C:\Users\Admin\AppData\Local\Temp\mubeskgb.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:1960
  - - C:\Users\Admin\AppData\Local\Temp\mubeskgb.exe
      "C:\Users\Admin\AppData\Local\Temp\mubeskgb.exe"
      4⤵
      Checks computer location settings
      Loads dropped DLL
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:1232
- C:\Windows\SysWOW64\cmstp.exe
  "C:\Windows\SysWOW64\cmstp.exe"
  2⤵
  - Blocklisted process makes network request
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1696
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1040

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\kfmbi.pra

Filesize
4KB

MD5
25cea2a583f9c4768e3e55ee7130fca3

SHA1
fbef27d48e1f1df3aceafa7bfc6fed017af34d03

SHA256
3f533a2e2a0308a48c692ba58f98a6e91a54d17f81a47d8b27bc574dc91fe425

SHA512
c689c35da39dc041fad1d5a722cd3ea669cfed88f6d4f4a4bb796eed4a46fcf40acd15c1c0c9357c26879d90c5bfb16f144a48fec738c73bd9f3ecd36af6daf8

Download Submit
C:\Users\Admin\AppData\Local\Temp\mubeskgb.exe

Filesize
58KB

MD5
46a32c2792387aba9d462423bc915bf8

SHA1
822e7dd38745e2067b73e45f0191ca07993f97dd

SHA256
ca6528e4c2b191efdec435f8769e90e1971c4853f32d5e311bae536efd77ff8d

SHA512
8943051f195be5bb72c4ec30cba3871fec1bdeecc66b7a326e699e63f379a7add1be5eaf70b408a76638a8d2756b6f0d9f112eb1addc22de2f92ffe74f8472a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\mubeskgb.exe

Filesize
58KB

MD5
46a32c2792387aba9d462423bc915bf8

SHA1
822e7dd38745e2067b73e45f0191ca07993f97dd

SHA256
ca6528e4c2b191efdec435f8769e90e1971c4853f32d5e311bae536efd77ff8d

SHA512
8943051f195be5bb72c4ec30cba3871fec1bdeecc66b7a326e699e63f379a7add1be5eaf70b408a76638a8d2756b6f0d9f112eb1addc22de2f92ffe74f8472a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\mubeskgb.exe

Filesize
58KB

MD5
46a32c2792387aba9d462423bc915bf8

SHA1
822e7dd38745e2067b73e45f0191ca07993f97dd

SHA256
ca6528e4c2b191efdec435f8769e90e1971c4853f32d5e311bae536efd77ff8d

SHA512
8943051f195be5bb72c4ec30cba3871fec1bdeecc66b7a326e699e63f379a7add1be5eaf70b408a76638a8d2756b6f0d9f112eb1addc22de2f92ffe74f8472a8

Download Submit
C:\Users\Admin\AppData\Local\Temp\yarxmpokn.h

Filesize
185KB

MD5
cffe7517a3ad697a7cc36424aafa46fa

SHA1
f07c60e6186e1d997f62c7938a6b59e3576541a2

SHA256
8e2bade6c04ea25c2c66277df95251e796c86efbd0326424c19eee987ee40f98

SHA512
cdef97834dc265ccc13bfae58c110cd1c38537e245baf2878ad954b583164b088da8146c5e1cec15c4b2265fe8e0f200bc9e9ae25a6b445f7417114179b6db08

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

Filesize
58KB

MD5
46a32c2792387aba9d462423bc915bf8

SHA1
822e7dd38745e2067b73e45f0191ca07993f97dd

SHA256
ca6528e4c2b191efdec435f8769e90e1971c4853f32d5e311bae536efd77ff8d

SHA512
8943051f195be5bb72c4ec30cba3871fec1bdeecc66b7a326e699e63f379a7add1be5eaf70b408a76638a8d2756b6f0d9f112eb1addc22de2f92ffe74f8472a8

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

Filesize
58KB

MD5
46a32c2792387aba9d462423bc915bf8

SHA1
822e7dd38745e2067b73e45f0191ca07993f97dd

SHA256
ca6528e4c2b191efdec435f8769e90e1971c4853f32d5e311bae536efd77ff8d

SHA512
8943051f195be5bb72c4ec30cba3871fec1bdeecc66b7a326e699e63f379a7add1be5eaf70b408a76638a8d2756b6f0d9f112eb1addc22de2f92ffe74f8472a8

Download Submit
\Users\Admin\AppData\Local\Temp\sqlite3.dll

Filesize
832KB

MD5
07fb6d31f37fb1b4164bef301306c288

SHA1
4cb41af6d63a07324ef6b18b1a1f43ce94e25626

SHA256
06ddf0a370af00d994824605a8e1307ba138f89b2d864539f0d19e8804edac02

SHA512
cab4a7c5805b80851aba5f2c9b001fabc1416f6648d891f49eacc81fe79287c5baa01306a42298da722750b812a4ea85388ffae9200dcf656dd1d5b5b9323353

Download Submit
memory/1232-64-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1232-62-0x00000000004012B0-mapping.dmp

Download
memory/1232-65-0x0000000000920000-0x0000000000C23000-memory.dmp

Filesize
3.0MB

Download
memory/1232-66-0x0000000000160000-0x0000000000170000-memory.dmp

Filesize
64KB

Download
memory/1404-76-0x0000000006420000-0x0000000006544000-memory.dmp

Filesize
1.1MB

Download
memory/1404-67-0x0000000004C70000-0x0000000004D6A000-memory.dmp

Filesize
1000KB

Download
memory/1404-74-0x0000000006420000-0x0000000006544000-memory.dmp

Filesize
1.1MB

Download
memory/1696-71-0x00000000000D0000-0x00000000000FD000-memory.dmp

Filesize
180KB

Download
memory/1696-70-0x0000000000E50000-0x0000000000E68000-memory.dmp

Filesize
96KB

Download
memory/1696-72-0x0000000000A40000-0x0000000000D43000-memory.dmp

Filesize
3.0MB

Download
memory/1696-73-0x0000000000800000-0x000000000088F000-memory.dmp

Filesize
572KB

Download
memory/1696-68-0x0000000000000000-mapping.dmp

Download
memory/1696-75-0x00000000000D0000-0x00000000000FD000-memory.dmp

Filesize
180KB

Download
memory/1960-56-0x0000000000000000-mapping.dmp

Download
memory/1972-54-0x00000000756B1000-0x00000000756B3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing