formbook | 1868d031ba42f5f9b2f176f218647509ebcbf1171ed0da75a594a26744d03d9a

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
27-05-2022 11:31

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General

Target

Swift Copy05262020.pdf.exe
Size

342KB
MD5

8380afc6e34fe722c9e16f6ee797bab8
SHA1

5dd6c2103053372286d09b6fdb374c1d43e23a4f
SHA256

1868d031ba42f5f9b2f176f218647509ebcbf1171ed0da75a594a26744d03d9a
SHA512

e6097dc8b5a633e0d9d8798ea1366338b7a1d64f822907c4ce5b5f9e6029438c578cb559731cdef87ad54a09f6890d76df73f2f1745248a05e18879cf782c39c

Score

10^/10

formbook xloader ygkp loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.6

Campaign

ygkp

Decoy

cbdlively.com

1nfo-post.com

janejohnsonlmt.com

autotradecryptoswithjack.com

mustang-international.net

dreamthorp.com

alexandratanner.net

exilings.com

gzjdgjg.com

51minzhu.com

wgv.info

raymondjamesconsult.com

omariblair.com

vaalerahealth.com

outdoorvoiceshop.com

spbo.info

blasiandating.online

c01-cdn48-oxble.xyz

mrmycology.com

installturbooax.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
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/2132-136-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/2132-139-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/2572-145-0x00000000013B0000-0x00000000013DB000-memory.dmp	xloader

Blocklisted process makes network request 1 IoCs

Processes:

wscript.exe

flow pid process

34 2572 wscript.exe
Executes dropped EXE 3 IoCs

Processes:

rtjwekgkjm.exertjwekgkjm.exemrg4xf_4fdb6a.exe

pid process

4056 rtjwekgkjm.exe
2132 rtjwekgkjm.exe
3804 mrg4xf_4fdb6a.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

flow	pid	process
34	2572	wscript.exe

pid	process
4056	rtjwekgkjm.exe
2132	rtjwekgkjm.exe
3804	mrg4xf_4fdb6a.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wscript.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\DFSTOR583D = "C:\\Program Files (x86)\\X6lqhbtbp\\mrg4xf_4fdb6a.exe"	wscript.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

rtjwekgkjm.exertjwekgkjm.exewscript.exe

description	pid	process	target process
PID 4056 set thread context of 2132	4056	rtjwekgkjm.exe	rtjwekgkjm.exe
PID 2132 set thread context of 2480	2132	rtjwekgkjm.exe	Explorer.EXE
PID 2572 set thread context of 2480	2572	wscript.exe	Explorer.EXE

Drops file in Program Files directory 4 IoCs

Processes:

Explorer.EXEwscript.exe

description	ioc	process
File created	C:\Program Files (x86)\X6lqhbtbp\mrg4xf_4fdb6a.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\X6lqhbtbp\mrg4xf_4fdb6a.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\X6lqhbtbp\mrg4xf_4fdb6a.exe	wscript.exe
File opened for modification	C:\Program Files (x86)\X6lqhbtbp	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

1568 3804 WerFault.exe mrg4xf_4fdb6a.exe

pid	pid_target	process	target process
1568	3804	WerFault.exe	mrg4xf_4fdb6a.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

wscript.exe

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

Suspicious behavior: EnumeratesProcesses 58 IoCs

Processes:

rtjwekgkjm.exewscript.exe

pid	process
2132	rtjwekgkjm.exe
2132	rtjwekgkjm.exe
2132	rtjwekgkjm.exe
2132	rtjwekgkjm.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe
2572	wscript.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2480 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

rtjwekgkjm.exewscript.exe

pid process

2132 rtjwekgkjm.exe
2132 rtjwekgkjm.exe
2132 rtjwekgkjm.exe
2572 wscript.exe
2572 wscript.exe
2572 wscript.exe
2572 wscript.exe

pid	process
2480	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

rtjwekgkjm.exewscript.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	2132	rtjwekgkjm.exe
Token: SeDebugPrivilege	2572	wscript.exe
Token: SeShutdownPrivilege	2480	Explorer.EXE
Token: SeCreatePagefilePrivilege	2480	Explorer.EXE

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

Swift Copy05262020.pdf.exertjwekgkjm.exeExplorer.EXEwscript.exe

description	pid	process	target process
PID 2608 wrote to memory of 4056	2608	Swift Copy05262020.pdf.exe	rtjwekgkjm.exe
PID 2608 wrote to memory of 4056	2608	Swift Copy05262020.pdf.exe	rtjwekgkjm.exe
PID 2608 wrote to memory of 4056	2608	Swift Copy05262020.pdf.exe	rtjwekgkjm.exe
PID 4056 wrote to memory of 2132	4056	rtjwekgkjm.exe	rtjwekgkjm.exe
PID 4056 wrote to memory of 2132	4056	rtjwekgkjm.exe	rtjwekgkjm.exe
PID 4056 wrote to memory of 2132	4056	rtjwekgkjm.exe	rtjwekgkjm.exe
PID 4056 wrote to memory of 2132	4056	rtjwekgkjm.exe	rtjwekgkjm.exe
PID 4056 wrote to memory of 2132	4056	rtjwekgkjm.exe	rtjwekgkjm.exe
PID 4056 wrote to memory of 2132	4056	rtjwekgkjm.exe	rtjwekgkjm.exe
PID 2480 wrote to memory of 2572	2480	Explorer.EXE	wscript.exe
PID 2480 wrote to memory of 2572	2480	Explorer.EXE	wscript.exe
PID 2480 wrote to memory of 2572	2480	Explorer.EXE	wscript.exe
PID 2572 wrote to memory of 3588	2572	wscript.exe	cmd.exe
PID 2572 wrote to memory of 3588	2572	wscript.exe	cmd.exe
PID 2572 wrote to memory of 3588	2572	wscript.exe	cmd.exe
PID 2572 wrote to memory of 4192	2572	wscript.exe	cmd.exe
PID 2572 wrote to memory of 4192	2572	wscript.exe	cmd.exe
PID 2572 wrote to memory of 4192	2572	wscript.exe	cmd.exe
PID 2572 wrote to memory of 3448	2572	wscript.exe	cmd.exe
PID 2572 wrote to memory of 3448	2572	wscript.exe	cmd.exe
PID 2572 wrote to memory of 3448	2572	wscript.exe	cmd.exe
PID 2572 wrote to memory of 3328	2572	wscript.exe	Firefox.exe
PID 2572 wrote to memory of 3328	2572	wscript.exe	Firefox.exe
PID 2572 wrote to memory of 3328	2572	wscript.exe	Firefox.exe
PID 2480 wrote to memory of 3804	2480	Explorer.EXE	mrg4xf_4fdb6a.exe
PID 2480 wrote to memory of 3804	2480	Explorer.EXE	mrg4xf_4fdb6a.exe
PID 2480 wrote to memory of 3804	2480	Explorer.EXE	mrg4xf_4fdb6a.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2480

C:\Users\Admin\AppData\Local\Temp\Swift Copy05262020.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Swift Copy05262020.pdf.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2608

C:\Users\Admin\AppData\Local\Temp\rtjwekgkjm.exe
C:\Users\Admin\AppData\Local\Temp\rtjwekgkjm.exe C:\Users\Admin\AppData\Local\Temp\jnianqsz
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4056

C:\Users\Admin\AppData\Local\Temp\rtjwekgkjm.exe
C:\Users\Admin\AppData\Local\Temp\rtjwekgkjm.exe C:\Users\Admin\AppData\Local\Temp\jnianqsz
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2132

C:\Windows\SysWOW64\wscript.exe
"C:\Windows\SysWOW64\wscript.exe"
2⤵
- Blocklisted process makes network request
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2572

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\rtjwekgkjm.exe"
3⤵
PID:3588

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:4192

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:3448

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:3328

C:\Program Files (x86)\X6lqhbtbp\mrg4xf_4fdb6a.exe
"C:\Program Files (x86)\X6lqhbtbp\mrg4xf_4fdb6a.exe"
2⤵
- Executes dropped EXE
PID:3804

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 492
3⤵
- Program crash
PID:1568

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3804 -ip 3804
1⤵
PID:2220

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\X6lqhbtbp\mrg4xf_4fdb6a.exe
Filesize
187KB

MD5
51cd1475dac44b90ecd715ee289848ba

SHA1
9660741ad44c4ec69abc62891bbb0aa462001d1f

SHA256
88c512b70e574231d68f24689249cb30c359ea192ee667c8840c4146f7218993

SHA512
541048bbbaaa14a92bf3ab7921d61ac96f335c76705ba834860ffecb88176551f16111337fb8622ce4d67fd6574d49ca7f7484db6d7567a8aa626b5ab2af3f7d

Download Submit
C:\Program Files (x86)\X6lqhbtbp\mrg4xf_4fdb6a.exe
Filesize
187KB

MD5
51cd1475dac44b90ecd715ee289848ba

SHA1
9660741ad44c4ec69abc62891bbb0aa462001d1f

SHA256
88c512b70e574231d68f24689249cb30c359ea192ee667c8840c4146f7218993

SHA512
541048bbbaaa14a92bf3ab7921d61ac96f335c76705ba834860ffecb88176551f16111337fb8622ce4d67fd6574d49ca7f7484db6d7567a8aa626b5ab2af3f7d

Download Submit
C:\Users\Admin\AppData\Local\Temp\4263sbwwg1i7i
Filesize
171KB

MD5
adafc1bd6fedbe5f73992bbf31f44991

SHA1
05b1f01d53016cac49c99e3255a015c3a8feefee

SHA256
39b7450d35e9b44a8e1a8b8bf69fed60a99532191600911a9018999b374b4989

SHA512
3248e472eeefa02a8652995fe2a016cd97e62e28655aacecadc56529845afcd4ba5b6cbd99ff9f4b281c27282429a749f2c226d2cb841321a0d8ca76ab186a88

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\DB1
Filesize
48KB

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

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

MD5
52f6fa9d66c85265d119cd735e446a33

SHA1
26eb6660ee34dc8baec4323296780fc53f652f34

SHA256
846e9ed6719f5fe6a44a25eaa9861674fed55ff1ece516c1ccc5ad5b45899608

SHA512
193d343db465b5c79fca0606316336cda81785eac4ceb1cd65d9301a94cd188a9b3bf9c2ec8b4ae70e7ef3db66940fcda015600706e28ead8778c8462259b194

Download Submit
C:\Users\Admin\AppData\Local\Temp\rtjwekgkjm.exe
Filesize
187KB

MD5
51cd1475dac44b90ecd715ee289848ba

SHA1
9660741ad44c4ec69abc62891bbb0aa462001d1f

SHA256
88c512b70e574231d68f24689249cb30c359ea192ee667c8840c4146f7218993

SHA512
541048bbbaaa14a92bf3ab7921d61ac96f335c76705ba834860ffecb88176551f16111337fb8622ce4d67fd6574d49ca7f7484db6d7567a8aa626b5ab2af3f7d

Download Submit
C:\Users\Admin\AppData\Local\Temp\rtjwekgkjm.exe
Filesize
187KB

MD5
51cd1475dac44b90ecd715ee289848ba

SHA1
9660741ad44c4ec69abc62891bbb0aa462001d1f

SHA256
88c512b70e574231d68f24689249cb30c359ea192ee667c8840c4146f7218993

SHA512
541048bbbaaa14a92bf3ab7921d61ac96f335c76705ba834860ffecb88176551f16111337fb8622ce4d67fd6574d49ca7f7484db6d7567a8aa626b5ab2af3f7d

Download Submit
C:\Users\Admin\AppData\Local\Temp\rtjwekgkjm.exe
Filesize
187KB

MD5
51cd1475dac44b90ecd715ee289848ba

SHA1
9660741ad44c4ec69abc62891bbb0aa462001d1f

SHA256
88c512b70e574231d68f24689249cb30c359ea192ee667c8840c4146f7218993

SHA512
541048bbbaaa14a92bf3ab7921d61ac96f335c76705ba834860ffecb88176551f16111337fb8622ce4d67fd6574d49ca7f7484db6d7567a8aa626b5ab2af3f7d

Download Submit
memory/2132-136-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2132-141-0x0000000001960000-0x0000000001971000-memory.dmp

Filesize
68KB

Download
memory/2132-140-0x0000000001990000-0x0000000001CDA000-memory.dmp

Filesize
3.3MB

Download
memory/2132-139-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/2132-135-0x0000000000000000-mapping.dmp

Download
memory/2480-149-0x0000000007E30000-0x0000000007FBE000-memory.dmp

Filesize
1.6MB

Download
memory/2480-142-0x00000000026E0000-0x0000000002799000-memory.dmp

Filesize
740KB

Download
memory/2572-147-0x00000000033C0000-0x000000000370A000-memory.dmp

Filesize
3.3MB

Download
memory/2572-148-0x0000000003220000-0x00000000032B0000-memory.dmp

Filesize
576KB

Download
memory/2572-145-0x00000000013B0000-0x00000000013DB000-memory.dmp

Filesize
172KB

Download
memory/2572-144-0x0000000000E40000-0x0000000000E67000-memory.dmp

Filesize
156KB

Download
memory/2572-143-0x0000000000000000-mapping.dmp

Download
memory/3448-152-0x0000000000000000-mapping.dmp

Download
memory/3588-146-0x0000000000000000-mapping.dmp

Download
memory/3804-154-0x0000000000000000-mapping.dmp

Download
memory/4056-130-0x0000000000000000-mapping.dmp

Download
memory/4192-150-0x0000000000000000-mapping.dmp

Download