formbook | 7952c76d1d86927893a2ef8ca0a23bb1b45af38565f2ad9cea09a942bd5059f8

General

Target

triage_dropped_file.exe
Size

704KB
MD5

6b25cd644f183af7c7447ba2d658e8c5
SHA1

b3fee68e0d04e03c34ba546bc714096d13641815
SHA256

7952c76d1d86927893a2ef8ca0a23bb1b45af38565f2ad9cea09a942bd5059f8
SHA512

877ca781d89283c5bf7e26e45dce561d52c7a580aa08b172313443681494bf2aa24664a42ca95b6d88e76b43196c51997509098dd0979459ebe9ff48a6f658a9

Score

10^/10

formbook m56u rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

m56u

Decoy

tercantiq.com

fortvillechicken.net

spiritsandtheb.com

alliant-inc.biz

yh1902.com

xiaodewenhua.net

cityjobs.xyz

seniorlivingwisconsin.com

piadagrilla.com

truistfinancebank.online

nft-fashionlover.com

hangmandownload.com

chun888.xyz

lemonviral.com

getagrip.network

daniellepinnock.info

chiswickstudios.com

essayservicee.com

bharatpragatifoundation.com

800vn.com

Signatures

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

Formbook Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1472-136-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/1472-138-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/520-144-0x0000000000510000-0x000000000053F000-memory.dmp	formbook
behavioral2/memory/520-149-0x0000000000510000-0x000000000053F000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

Processes:

triage_dropped_file.exetriage_dropped_file.exechkdsk.exe

description	pid	process	target process
PID 392 set thread context of 1472	392	triage_dropped_file.exe	triage_dropped_file.exe
PID 1472 set thread context of 3152	1472	triage_dropped_file.exe	Explorer.EXE
PID 520 set thread context of 3152	520	chkdsk.exe	Explorer.EXE

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 50 IoCs

Processes:

triage_dropped_file.exechkdsk.exe

pid	process
1472	triage_dropped_file.exe
1472	triage_dropped_file.exe
1472	triage_dropped_file.exe
1472	triage_dropped_file.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe
520	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3152 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

triage_dropped_file.exechkdsk.exe

pid process

1472 triage_dropped_file.exe
1472 triage_dropped_file.exe
1472 triage_dropped_file.exe
520 chkdsk.exe
520 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

triage_dropped_file.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 1472 triage_dropped_file.exe
Token: SeDebugPrivilege 520 chkdsk.exe

pid	process
3152	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1472	triage_dropped_file.exe
Token: SeDebugPrivilege	520	chkdsk.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

triage_dropped_file.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 392 wrote to memory of 1472	392	triage_dropped_file.exe	triage_dropped_file.exe
PID 392 wrote to memory of 1472	392	triage_dropped_file.exe	triage_dropped_file.exe
PID 392 wrote to memory of 1472	392	triage_dropped_file.exe	triage_dropped_file.exe
PID 392 wrote to memory of 1472	392	triage_dropped_file.exe	triage_dropped_file.exe
PID 392 wrote to memory of 1472	392	triage_dropped_file.exe	triage_dropped_file.exe
PID 392 wrote to memory of 1472	392	triage_dropped_file.exe	triage_dropped_file.exe
PID 3152 wrote to memory of 520	3152	Explorer.EXE	chkdsk.exe
PID 3152 wrote to memory of 520	3152	Explorer.EXE	chkdsk.exe
PID 3152 wrote to memory of 520	3152	Explorer.EXE	chkdsk.exe
PID 520 wrote to memory of 3000	520	chkdsk.exe	cmd.exe
PID 520 wrote to memory of 3000	520	chkdsk.exe	cmd.exe
PID 520 wrote to memory of 3000	520	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3152

C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe
"C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:392

C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe
"C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1472

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:520

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe"
3⤵
PID:3000

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/392-131-0x00000000052B0000-0x0000000005854000-memory.dmp

Filesize
5.6MB

Download
memory/392-132-0x0000000004D00000-0x0000000004D92000-memory.dmp

Filesize
584KB

Download
memory/392-133-0x0000000004CC0000-0x0000000004CCA000-memory.dmp

Filesize
40KB

Download
memory/392-134-0x0000000008780000-0x000000000881C000-memory.dmp

Filesize
624KB

Download
memory/392-130-0x0000000000280000-0x0000000000336000-memory.dmp

Filesize
728KB

Download
memory/520-142-0x0000000000000000-mapping.dmp

Download
memory/520-149-0x0000000000510000-0x000000000053F000-memory.dmp

Filesize
188KB

Download
memory/520-147-0x0000000000D60000-0x0000000000DF3000-memory.dmp

Filesize
588KB

Download
memory/520-146-0x0000000000E40000-0x000000000118A000-memory.dmp

Filesize
3.3MB

Download
memory/520-144-0x0000000000510000-0x000000000053F000-memory.dmp

Filesize
188KB

Download
memory/520-143-0x0000000000590000-0x000000000059A000-memory.dmp

Filesize
40KB

Download
memory/1472-135-0x0000000000000000-mapping.dmp

Download
memory/1472-140-0x0000000001530000-0x0000000001544000-memory.dmp

Filesize
80KB

Download
memory/1472-139-0x0000000001A00000-0x0000000001D4A000-memory.dmp

Filesize
3.3MB

Download
memory/1472-138-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1472-136-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3000-145-0x0000000000000000-mapping.dmp

Download
memory/3152-141-0x0000000002B50000-0x0000000002C18000-memory.dmp

Filesize
800KB

Download
memory/3152-148-0x00000000084D0000-0x00000000085D8000-memory.dmp

Filesize
1.0MB

Download
memory/3152-150-0x00000000084D0000-0x00000000085D8000-memory.dmp

Filesize
1.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads