formbook | 7200e6d6b1dd98a190a8624abee4b4af6794c74e7e13b5bbb0a9302ca79b5800

General

Target

Image001.exe
Size

231KB
MD5

4ea509c18030b4e71413f2b2bd3b989c
SHA1

5ba34126a4a502bf6e5305c1e647fcf4a7488677
SHA256

c0ebfff80d42551c1a910f2c7b8c08af384e5ccf49c979b7bf664e6c1b731607
SHA512

864dfbe7e07fa4fcf15b487b6c41d20aad5c90d56518f305d8eeb2229ca3e28a9728c2ae5ef4e362d10d7f9a93996f0b67b61e8b5e224b89911152fa1a9db518

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.riceandginger.com/fcn/

Decoy

bellee-select.com

unlock-motorola.com

courtneyrunyon.com

hnzywjz.com

retrievingbest.net

ayescarrental.com

beyoutifulblessings.com

heritagediscovery.net

fasoum.com

wbz.xyz

lownak.com

alinkarmay.com

coffeyquiltco.com

validdreamers.com

yuksukcu.club

buildnextfrc.com

avantfarme.com

xyfs360.com

holisticpacific.com

banejia.com

Signatures

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

Formbook Payload 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1100-118-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/2828-127-0x0000000004F40000-0x0000000004F6E000-memory.dmp	formbook

Loads dropped DLL 1 IoCs

Processes:

Image001.exe

pid process

508 Image001.exe

pid	process
508	Image001.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

Image001.exeImage001.exechkdsk.exe

description	pid	process	target process
PID 508 set thread context of 1100	508	Image001.exe	Image001.exe
PID 1100 set thread context of 3016	1100	Image001.exe	Explorer.EXE
PID 1100 set thread context of 3016	1100	Image001.exe	Explorer.EXE
PID 2828 set thread context of 3016	2828	chkdsk.exe	Explorer.EXE

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

System Information Discovery
T1082
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 60 IoCs

Processes:

Image001.exechkdsk.exe

pid	process
1100	Image001.exe
1100	Image001.exe
1100	Image001.exe
1100	Image001.exe
1100	Image001.exe
1100	Image001.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe
2828	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

3016 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

Image001.exeImage001.exechkdsk.exe

pid process

508 Image001.exe
1100 Image001.exe
1100 Image001.exe
1100 Image001.exe
1100 Image001.exe
2828 chkdsk.exe
2828 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Image001.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 1100 Image001.exe
Token: SeDebugPrivilege 2828 chkdsk.exe

pid	process
3016	Explorer.EXE

pid	process
508	Image001.exe
1100	Image001.exe
1100	Image001.exe
1100	Image001.exe
1100	Image001.exe
2828	chkdsk.exe
2828	chkdsk.exe

description	pid	process
Token: SeDebugPrivilege	1100	Image001.exe
Token: SeDebugPrivilege	2828	chkdsk.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

Image001.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 508 wrote to memory of 1100	508	Image001.exe	Image001.exe
PID 508 wrote to memory of 1100	508	Image001.exe	Image001.exe
PID 508 wrote to memory of 1100	508	Image001.exe	Image001.exe
PID 508 wrote to memory of 1100	508	Image001.exe	Image001.exe
PID 3016 wrote to memory of 2828	3016	Explorer.EXE	chkdsk.exe
PID 3016 wrote to memory of 2828	3016	Explorer.EXE	chkdsk.exe
PID 3016 wrote to memory of 2828	3016	Explorer.EXE	chkdsk.exe
PID 2828 wrote to memory of 3116	2828	chkdsk.exe	cmd.exe
PID 2828 wrote to memory of 3116	2828	chkdsk.exe	cmd.exe
PID 2828 wrote to memory of 3116	2828	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3016

C:\Users\Admin\AppData\Local\Temp\Image001.exe
"C:\Users\Admin\AppData\Local\Temp\Image001.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:508

C:\Users\Admin\AppData\Local\Temp\Image001.exe
"C:\Users\Admin\AppData\Local\Temp\Image001.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1100

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:2828

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Image001.exe"
3⤵
PID:3116

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\nsnF421.tmp\xl19yxkx7ev.dll
MD5
021e31cdf92985d3de940632b4229cc2

SHA1
e18b54d4c7882a1cad146f921296c1461f1dd37b

SHA256
8b67f5fcae3d901b37b4dafc71386cb3c3cf5ca92e91e8d931c4de394b09441b

SHA512
91ace46af5fdc23e61dc5800d1bcfd8f9cbdca12c9e79f6fefa52ad51e5a062fcff46296bfadc18fdea577f99690e6d474c9ae90b24f0e4944cab4352a752e42

Download Submit
memory/508-116-0x00000000030C0000-0x00000000030C1000-memory.dmp

Filesize
4KB

Download
memory/508-117-0x00000000030C1000-0x00000000030C3000-memory.dmp

Filesize
8KB

Download
memory/1100-122-0x0000000000920000-0x0000000000934000-memory.dmp

Filesize
80KB

Download
memory/1100-115-0x000000000041EAA0-mapping.dmp

Download
memory/1100-120-0x00000000008D0000-0x00000000008E4000-memory.dmp

Filesize
80KB

Download
memory/1100-119-0x0000000000970000-0x0000000000C90000-memory.dmp

Filesize
3.1MB

Download
memory/1100-118-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2828-126-0x00000000009D0000-0x00000000009DA000-memory.dmp

Filesize
40KB

Download
memory/2828-124-0x0000000000000000-mapping.dmp

Download
memory/2828-127-0x0000000004F40000-0x0000000004F6E000-memory.dmp

Filesize
184KB

Download
memory/2828-128-0x0000000005770000-0x0000000005A90000-memory.dmp

Filesize
3.1MB

Download
memory/2828-129-0x0000000005440000-0x00000000054D3000-memory.dmp

Filesize
588KB

Download
memory/3016-123-0x0000000005950000-0x0000000005A87000-memory.dmp

Filesize
1.2MB

Download
memory/3016-121-0x0000000005880000-0x0000000005942000-memory.dmp

Filesize
776KB

Download
memory/3016-130-0x0000000003220000-0x00000000032D4000-memory.dmp

Filesize
720KB

Download
memory/3116-125-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads