formbook | c5cd34b02edf4237ffc0f3cf349c323dbb4c4e86c4ae3995595960ec66fc44f3

General

Target

doc_2024120289986556.exe
Size

991KB
MD5

b57d94df7f67bd053f7f73c98d64d4d0
SHA1

971bad50b10b4a7e275543bf68e48e367309a1ed
SHA256

449a3b5d6001e64b6b1a86e4c0fb7bac53d2679947f26948264554e4cb7a4372
SHA512

67fc5ab3e433e4ebff85470b1b378fbd94aec716b08b557474d6745d090212f13f1e95d527a4135ee4ee424b7889e7bc94b9cd287ae25a7c903ae03774fb5832
SSDEEP

24576:2vCFfkjQtYixBYTpTZONDejqaBjiMD95Q7F:pFfkgtUTpSej9iMD9Q

Score

10^/10

formbook guloader g92s discovery downloader rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

g92s

Decoy

lobalnews.skin

arehouse-inventory-89734.bond

isknews.online

reatfragrancecollection.net

ushaogang4.fun

agorajaku4d.pro

18p10.vip

yperionfocus.store

leva.cat

io-rduga1-ben.xyz

iscovermore.online

ootsprojectbali.camera

etzsrv.xyz

utureaiquantification.xyz

rooksexcavation.cam

5vintage.shop

lackfridayangebot.online

djmoqvxz.cyou

dams-care.online

ood-20241020-763.today

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Formbook family
formbook
Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Formbook payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/340-45-0x0000000000400000-0x0000000001462000-memory.dmp	formbook
behavioral1/memory/340-46-0x0000000000400000-0x0000000001462000-memory.dmp	formbook
behavioral1/memory/2460-51-0x0000000000110000-0x000000000013F000-memory.dmp	formbook

Deletes itself 1 IoCs

Processes:

cmd.exe

pid	Process
1400	cmd.exe

Loads dropped DLL 1 IoCs

Processes:

doc_2024120289986556.exe

pid	Process
2524	doc_2024120289986556.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

doc_2024120289986556.exe

pid	Process
340	doc_2024120289986556.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

doc_2024120289986556.exedoc_2024120289986556.exe

pid	Process
2524	doc_2024120289986556.exe
340	doc_2024120289986556.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

doc_2024120289986556.exedoc_2024120289986556.exesystray.exe

description	pid	Process	procid_target
PID 2524 set thread context of 340	2524	doc_2024120289986556.exe	30
PID 340 set thread context of 1204	340	doc_2024120289986556.exe	21
PID 2460 set thread context of 1204	2460	systray.exe	21

Drops file in Program Files directory 1 IoCs

Processes:

doc_2024120289986556.exe

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\carbinol\kogejomfruens.for	doc_2024120289986556.exe

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

Processes:

doc_2024120289986556.exedoc_2024120289986556.exesystray.execmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	doc_2024120289986556.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	doc_2024120289986556.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	systray.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

Processes:

doc_2024120289986556.exesystray.exe

pid	Process
340	doc_2024120289986556.exe
340	doc_2024120289986556.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe
2460	systray.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

doc_2024120289986556.exedoc_2024120289986556.exesystray.exe

pid	Process
2524	doc_2024120289986556.exe
340	doc_2024120289986556.exe
340	doc_2024120289986556.exe
340	doc_2024120289986556.exe
2460	systray.exe
2460	systray.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

doc_2024120289986556.exesystray.exe

description	pid	Process
Token: SeDebugPrivilege	340	doc_2024120289986556.exe
Token: SeDebugPrivilege	2460	systray.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

doc_2024120289986556.exeExplorer.EXEsystray.exe

description	pid	Process	procid_target
PID 2524 wrote to memory of 340	2524	doc_2024120289986556.exe	30
PID 2524 wrote to memory of 340	2524	doc_2024120289986556.exe	30
PID 2524 wrote to memory of 340	2524	doc_2024120289986556.exe	30
PID 2524 wrote to memory of 340	2524	doc_2024120289986556.exe	30
PID 2524 wrote to memory of 340	2524	doc_2024120289986556.exe	30
PID 2524 wrote to memory of 340	2524	doc_2024120289986556.exe	30
PID 1204 wrote to memory of 2460	1204	Explorer.EXE	35
PID 1204 wrote to memory of 2460	1204	Explorer.EXE	35
PID 1204 wrote to memory of 2460	1204	Explorer.EXE	35
PID 1204 wrote to memory of 2460	1204	Explorer.EXE	35
PID 2460 wrote to memory of 1400	2460	systray.exe	36
PID 2460 wrote to memory of 1400	2460	systray.exe	36
PID 2460 wrote to memory of 1400	2460	systray.exe	36
PID 2460 wrote to memory of 1400	2460	systray.exe	36

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1204
- C:\Users\Admin\AppData\Local\Temp\doc_2024120289986556.exe
  "C:\Users\Admin\AppData\Local\Temp\doc_2024120289986556.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2524
- - C:\Users\Admin\AppData\Local\Temp\doc_2024120289986556.exe
    "C:\Users\Admin\AppData\Local\Temp\doc_2024120289986556.exe"
    3⤵
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:340
- 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:2460
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\doc_2024120289986556.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:1400

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

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\nsy9D59.tmp\System.dll

Filesize
11KB

MD5
0ff2d70cfdc8095ea99ca2dabbec3cd7

SHA1
10c51496d37cecd0e8a503a5a9bb2329d9b38116

SHA256
982c5fb7ada7d8c9bc3e419d1c35da6f05bc5dd845940c179af3a33d00a36a8b

SHA512
cb5fc0b3194f469b833c2c9abf493fcec5251e8609881b7f5e095b9bd09ed468168e95dda0ba415a7d8d6b7f0dee735467c0ed8e52b223eb5359986891ba6e2e

Download Submit
memory/340-45-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-17-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-18-0x0000000077070000-0x0000000077219000-memory.dmp

Filesize
1.7MB

Download
memory/340-19-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/340-46-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2460-50-0x0000000000CB0000-0x0000000000CB5000-memory.dmp

Filesize
20KB

Download
memory/2460-51-0x0000000000110000-0x000000000013F000-memory.dmp

Filesize
188KB

Download
memory/2524-13-0x0000000077071000-0x0000000077172000-memory.dmp

Filesize
1.0MB

Download
memory/2524-14-0x0000000077070000-0x0000000077219000-memory.dmp

Filesize
1.7MB

Download
memory/2524-15-0x0000000002DB0000-0x000000000539B000-memory.dmp

Filesize
37.9MB

Download
memory/2524-16-0x0000000002DB0000-0x000000000539B000-memory.dmp

Filesize
37.9MB

Download
memory/2524-12-0x0000000002DB0000-0x000000000539B000-memory.dmp

Filesize
37.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads