formbook | ecd736b3ee17564a101bfdf8ff757edf53948a983ef1c1dd088cd9f214034990

General

Target

b116243ed4215cbcb325a827d11cdc68.exe
Size

245KB
MD5

b116243ed4215cbcb325a827d11cdc68
SHA1

c9ef499d8ec2966dda389ce769012b4ad6661cbc
SHA256

ecd736b3ee17564a101bfdf8ff757edf53948a983ef1c1dd088cd9f214034990
SHA512

39543aa90882920e8ba46777eb092abb678471c7cc7876d1ad98b2d4b1c6f4f50669d18c764c3b655866a682acabe2b73e1958be5a4ebfc0973574d210393ef3

Score

10^/10

formbook xloader bs8f loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

bs8f

Decoy

atmospheraglobal.com

dontshootima.com

bestofferusde.club

yourdigitalboss.com

breskizci.com

myarrovacoastwebsite.com

reasclerk.com

efrovida.com

wsmz.net

upneett.com

loefflerforgov.com

noida.info

trndystore.com

arhaldar.online

vivibanca.tech

mykrema.com

vseserialy.online

ridgewayinsua.com

heauxland.com

bestcollegecourses.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3708-136-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/3708-139-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/4608-145-0x0000000000F90000-0x0000000000FB9000-memory.dmp	xloader

Executes dropped EXE 3 IoCs

Processes:

fdwfm.exefdwfm.execdixplbpuvk.exe

pid process

384 fdwfm.exe
3708 fdwfm.exe
4936 cdixplbpuvk.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

pid	process
384	fdwfm.exe
3708	fdwfm.exe
4936	cdixplbpuvk.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ipconfig.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	ipconfig.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\GJOP6TG0KVTH = "C:\\Program Files (x86)\\Kplx4\\cdixplbpuvk.exe"	ipconfig.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

fdwfm.exefdwfm.exeipconfig.exe

description	pid	process	target process
PID 384 set thread context of 3708	384	fdwfm.exe	fdwfm.exe
PID 3708 set thread context of 2600	3708	fdwfm.exe	Explorer.EXE
PID 4608 set thread context of 2600	4608	ipconfig.exe	Explorer.EXE

Drops file in Program Files directory 4 IoCs

Processes:

ipconfig.exeExplorer.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Kplx4\cdixplbpuvk.exe	ipconfig.exe
File opened for modification	C:\Program Files (x86)\Kplx4	Explorer.EXE
File created	C:\Program Files (x86)\Kplx4\cdixplbpuvk.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\Kplx4\cdixplbpuvk.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
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

984 4936 WerFault.exe cdixplbpuvk.exe
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command-Line Interface
T1059

Processes:

ipconfig.exe

pid process

4608 ipconfig.exe

pid	pid_target	process	target process
984	4936	WerFault.exe	cdixplbpuvk.exe

pid	process
4608	ipconfig.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

ipconfig.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	ipconfig.exe

Modifies registry class 2 IoCs

Processes:

Explorer.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	Explorer.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 52 IoCs

Processes:

fdwfm.exeipconfig.exe

pid	process
3708	fdwfm.exe
3708	fdwfm.exe
3708	fdwfm.exe
3708	fdwfm.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe
4608	ipconfig.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2600 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

fdwfm.exeipconfig.exe

pid process

3708 fdwfm.exe
3708 fdwfm.exe
3708 fdwfm.exe
4608 ipconfig.exe
4608 ipconfig.exe
4608 ipconfig.exe
4608 ipconfig.exe

pid	process
2600	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

fdwfm.exeipconfig.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	3708	fdwfm.exe
Token: SeDebugPrivilege	4608	ipconfig.exe
Token: SeShutdownPrivilege	2600	Explorer.EXE
Token: SeCreatePagefilePrivilege	2600	Explorer.EXE
Token: SeShutdownPrivilege	2600	Explorer.EXE
Token: SeCreatePagefilePrivilege	2600	Explorer.EXE
Token: SeShutdownPrivilege	2600	Explorer.EXE
Token: SeCreatePagefilePrivilege	2600	Explorer.EXE

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

b116243ed4215cbcb325a827d11cdc68.exefdwfm.exeExplorer.EXEipconfig.exe

description	pid	process	target process
PID 2828 wrote to memory of 384	2828	b116243ed4215cbcb325a827d11cdc68.exe	fdwfm.exe
PID 2828 wrote to memory of 384	2828	b116243ed4215cbcb325a827d11cdc68.exe	fdwfm.exe
PID 2828 wrote to memory of 384	2828	b116243ed4215cbcb325a827d11cdc68.exe	fdwfm.exe
PID 384 wrote to memory of 3708	384	fdwfm.exe	fdwfm.exe
PID 384 wrote to memory of 3708	384	fdwfm.exe	fdwfm.exe
PID 384 wrote to memory of 3708	384	fdwfm.exe	fdwfm.exe
PID 384 wrote to memory of 3708	384	fdwfm.exe	fdwfm.exe
PID 384 wrote to memory of 3708	384	fdwfm.exe	fdwfm.exe
PID 384 wrote to memory of 3708	384	fdwfm.exe	fdwfm.exe
PID 2600 wrote to memory of 4608	2600	Explorer.EXE	ipconfig.exe
PID 2600 wrote to memory of 4608	2600	Explorer.EXE	ipconfig.exe
PID 2600 wrote to memory of 4608	2600	Explorer.EXE	ipconfig.exe
PID 4608 wrote to memory of 4548	4608	ipconfig.exe	cmd.exe
PID 4608 wrote to memory of 4548	4608	ipconfig.exe	cmd.exe
PID 4608 wrote to memory of 4548	4608	ipconfig.exe	cmd.exe
PID 4608 wrote to memory of 5076	4608	ipconfig.exe	cmd.exe
PID 4608 wrote to memory of 5076	4608	ipconfig.exe	cmd.exe
PID 4608 wrote to memory of 5076	4608	ipconfig.exe	cmd.exe
PID 4608 wrote to memory of 4968	4608	ipconfig.exe	Firefox.exe
PID 4608 wrote to memory of 4968	4608	ipconfig.exe	Firefox.exe
PID 2600 wrote to memory of 4936	2600	Explorer.EXE	cdixplbpuvk.exe
PID 2600 wrote to memory of 4936	2600	Explorer.EXE	cdixplbpuvk.exe
PID 2600 wrote to memory of 4936	2600	Explorer.EXE	cdixplbpuvk.exe
PID 4608 wrote to memory of 4968	4608	ipconfig.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2600

C:\Users\Admin\AppData\Local\Temp\b116243ed4215cbcb325a827d11cdc68.exe
"C:\Users\Admin\AppData\Local\Temp\b116243ed4215cbcb325a827d11cdc68.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2828

C:\Users\Admin\AppData\Local\Temp\fdwfm.exe
C:\Users\Admin\AppData\Local\Temp\fdwfm.exe C:\Users\Admin\AppData\Local\Temp\dimjwfh
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:384

C:\Users\Admin\AppData\Local\Temp\fdwfm.exe
C:\Users\Admin\AppData\Local\Temp\fdwfm.exe C:\Users\Admin\AppData\Local\Temp\dimjwfh
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3708

C:\Windows\SysWOW64\ipconfig.exe
"C:\Windows\SysWOW64\ipconfig.exe"
2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Gathers network information
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4608

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\fdwfm.exe"
3⤵
PID:4548

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:5076

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4968

C:\Program Files (x86)\Kplx4\cdixplbpuvk.exe
"C:\Program Files (x86)\Kplx4\cdixplbpuvk.exe"
2⤵
- Executes dropped EXE
PID:4936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4936 -s 216
3⤵
- Program crash
PID:984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 4936 -ip 4936
1⤵
PID:2192

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Command-Line Interface

1

T1059

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\Kplx4\cdixplbpuvk.exe
Filesize
74KB

MD5
20a453ac2dfd314bf1f374bb0171681e

SHA1
cf673d84f74b343061b923a8cd90936344cb5bc4

SHA256
26a72e117f00a00dfe14730575d9e791eb783f5df77d3cdc7e736ef8493f93e0

SHA512
ba8606472ab4d03ef92689ddf993df62d0e1dc743e65821e915ef6237e9ff9e81cd7670f1da3f88748e1b66a8a80e72d9796adcb834fc159314db9af4882a642

Download Submit
C:\Program Files (x86)\Kplx4\cdixplbpuvk.exe
Filesize
74KB

MD5
20a453ac2dfd314bf1f374bb0171681e

SHA1
cf673d84f74b343061b923a8cd90936344cb5bc4

SHA256
26a72e117f00a00dfe14730575d9e791eb783f5df77d3cdc7e736ef8493f93e0

SHA512
ba8606472ab4d03ef92689ddf993df62d0e1dc743e65821e915ef6237e9ff9e81cd7670f1da3f88748e1b66a8a80e72d9796adcb834fc159314db9af4882a642

Download Submit
C:\Users\Admin\AppData\Local\Temp\07psh9jxx8mb5t
Filesize
163KB

MD5
2c8a5acbcf62c17a33d922b3b195e5f2

SHA1
4d8f1fd37d8a88fce9a413e50953616a2a79a4a7

SHA256
a4a062a6f2ba7f29ef472549256f378c72ce26b94466acd3a313eb6d61fbc664

SHA512
e96420d378adf2b601b067a8d6426a4544b0c42dcca850ba3e342167899f3245bd2b5d4655015e39b26e3465566c10d1576253f5c104904362ea27700fadc24c

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\dimjwfh
Filesize
4KB

MD5
cb63c004083d462107d544017b29f953

SHA1
20896ed8b2ef0f60cd37cea225f0174ac4a4fe6b

SHA256
da7cb9a05a5d27d1d6a2817bee8478627bbaaea1dcc393cd58f32b461462d4c7

SHA512
aa0475bd3bda49f7d032a53b5dc98d8029718f9bc15b209c8cf8f5515cd59e3e20209908d8d9df139c38420f23bd69808bb1b452adb1e0576d9834ba0a465445

Download Submit
C:\Users\Admin\AppData\Local\Temp\fdwfm.exe
Filesize
74KB

MD5
20a453ac2dfd314bf1f374bb0171681e

SHA1
cf673d84f74b343061b923a8cd90936344cb5bc4

SHA256
26a72e117f00a00dfe14730575d9e791eb783f5df77d3cdc7e736ef8493f93e0

SHA512
ba8606472ab4d03ef92689ddf993df62d0e1dc743e65821e915ef6237e9ff9e81cd7670f1da3f88748e1b66a8a80e72d9796adcb834fc159314db9af4882a642

Download Submit
C:\Users\Admin\AppData\Local\Temp\fdwfm.exe
Filesize
74KB

MD5
20a453ac2dfd314bf1f374bb0171681e

SHA1
cf673d84f74b343061b923a8cd90936344cb5bc4

SHA256
26a72e117f00a00dfe14730575d9e791eb783f5df77d3cdc7e736ef8493f93e0

SHA512
ba8606472ab4d03ef92689ddf993df62d0e1dc743e65821e915ef6237e9ff9e81cd7670f1da3f88748e1b66a8a80e72d9796adcb834fc159314db9af4882a642

Download Submit
C:\Users\Admin\AppData\Local\Temp\fdwfm.exe
Filesize
74KB

MD5
20a453ac2dfd314bf1f374bb0171681e

SHA1
cf673d84f74b343061b923a8cd90936344cb5bc4

SHA256
26a72e117f00a00dfe14730575d9e791eb783f5df77d3cdc7e736ef8493f93e0

SHA512
ba8606472ab4d03ef92689ddf993df62d0e1dc743e65821e915ef6237e9ff9e81cd7670f1da3f88748e1b66a8a80e72d9796adcb834fc159314db9af4882a642

Download Submit
memory/384-130-0x0000000000000000-mapping.dmp

Download
memory/2600-142-0x0000000002B90000-0x0000000002C5B000-memory.dmp

Filesize
812KB

Download
memory/2600-149-0x0000000002C60000-0x0000000002D6C000-memory.dmp

Filesize
1.0MB

Download
memory/3708-136-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/3708-141-0x0000000000DF0000-0x0000000000E01000-memory.dmp

Filesize
68KB

Download
memory/3708-140-0x00000000009B0000-0x0000000000CFA000-memory.dmp

Filesize
3.3MB

Download
memory/3708-139-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/3708-135-0x0000000000000000-mapping.dmp

Download
memory/4548-147-0x0000000000000000-mapping.dmp

Download
memory/4608-143-0x0000000000000000-mapping.dmp

Download
memory/4608-145-0x0000000000F90000-0x0000000000FB9000-memory.dmp

Filesize
164KB

Download
memory/4608-144-0x0000000000EF0000-0x0000000000EFB000-memory.dmp

Filesize
44KB

Download
memory/4608-146-0x0000000001880000-0x0000000001BCA000-memory.dmp

Filesize
3.3MB

Download
memory/4608-148-0x0000000001760000-0x00000000017F0000-memory.dmp

Filesize
576KB

Download
memory/4936-152-0x0000000000000000-mapping.dmp

Download
memory/5076-150-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads