formbook | 8b32a471a19e78217ba94e7663567c3b1b1d86090df2febfb00bc2bd76b1e66a

General

Target

stud.exe
Size

755KB
MD5

6044900d66376321ad6f237d1b465ecc
SHA1

0147db0583256b648680a54573b288f9167cca67
SHA256

9099123ab27c467c09e2483339756820e29e6d8cd3d0346305d3873902e4af65
SHA512

03fdca6dfdccc2a17abbfb42adfb5a89a5e2a32b9929efde0689da17967db406dd55f057162d2324605254c354130c8b73077fa9bc4bf23053878ffc5f239076

Score

10^/10

formbook asa2 persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

asa2

Decoy

kznbf.info

dl-today.com

jiucai1688.com

makrobet508.com

xjyyjx.com

xn--riqq15a1oh5j5a.com

ecotrait.com

668opebet.com

lucyloveboutique.com

suddenslim.com

mettsing.com

0pe816.com

expressionsofebony.com

ripleychurchofchrist.com

cwinterim.com

qilu129.com

enoteca17.com

itbpolice.com

shoulderworkmassage.com

02lh.com

Signatures

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

Formbook Payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3440-137-0x0000000000DF0000-0x0000000000E1D000-memory.dmp	formbook

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

raserver.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	raserver.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\FZ7DYTBPM8 = "C:\\Program Files (x86)\\Calv\\azm8ffw_h8tjr.exe"	raserver.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

stud.exestud.exeraserver.exe

description	pid	process	target process
PID 2704 set thread context of 3604	2704	stud.exe	stud.exe
PID 3604 set thread context of 2604	3604	stud.exe	Explorer.EXE
PID 3440 set thread context of 2604	3440	raserver.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

raserver.exe

description ioc process

File opened for modification C:\Program Files (x86)\Calv\azm8ffw_h8tjr.exe raserver.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Calv\azm8ffw_h8tjr.exe	raserver.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

raserver.exe

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

Suspicious behavior: EnumeratesProcesses 60 IoCs

Processes:

stud.exestud.exeraserver.exe

pid	process
2704	stud.exe
2704	stud.exe
3604	stud.exe
3604	stud.exe
3604	stud.exe
3604	stud.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe
3440	raserver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2604 Explorer.EXE
Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

stud.exestud.exeraserver.exe

pid process

2704 stud.exe
3604 stud.exe
3604 stud.exe
3604 stud.exe
3440 raserver.exe
3440 raserver.exe
3440 raserver.exe
3440 raserver.exe

pid	process
2604	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

stud.exeraserver.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	3604	stud.exe
Token: SeDebugPrivilege	3440	raserver.exe
Token: SeShutdownPrivilege	2604	Explorer.EXE
Token: SeCreatePagefilePrivilege	2604	Explorer.EXE
Token: SeShutdownPrivilege	2604	Explorer.EXE
Token: SeCreatePagefilePrivilege	2604	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

stud.exeExplorer.EXEraserver.exe

description	pid	process	target process
PID 2704 wrote to memory of 3604	2704	stud.exe	stud.exe
PID 2704 wrote to memory of 3604	2704	stud.exe	stud.exe
PID 2704 wrote to memory of 3604	2704	stud.exe	stud.exe
PID 2604 wrote to memory of 3440	2604	Explorer.EXE	raserver.exe
PID 2604 wrote to memory of 3440	2604	Explorer.EXE	raserver.exe
PID 2604 wrote to memory of 3440	2604	Explorer.EXE	raserver.exe
PID 3440 wrote to memory of 1384	3440	raserver.exe	cmd.exe
PID 3440 wrote to memory of 1384	3440	raserver.exe	cmd.exe
PID 3440 wrote to memory of 1384	3440	raserver.exe	cmd.exe
PID 3440 wrote to memory of 2932	3440	raserver.exe	cmd.exe
PID 3440 wrote to memory of 2932	3440	raserver.exe	cmd.exe
PID 3440 wrote to memory of 2932	3440	raserver.exe	cmd.exe
PID 3440 wrote to memory of 4052	3440	raserver.exe	Firefox.exe
PID 3440 wrote to memory of 4052	3440	raserver.exe	Firefox.exe
PID 3440 wrote to memory of 4052	3440	raserver.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2604

C:\Users\Admin\AppData\Local\Temp\stud.exe
"C:\Users\Admin\AppData\Local\Temp\stud.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2704

C:\Users\Admin\AppData\Local\Temp\stud.exe
"C:\Users\Admin\AppData\Local\Temp\stud.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3604

C:\Windows\SysWOW64\raserver.exe
"C:\Windows\SysWOW64\raserver.exe"
2⤵
- 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:3440

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\stud.exe"
3⤵
PID:1384

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:2932

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4052

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Roaming\K07-R0E1\K07logim.jpeg
Filesize
82KB

MD5
f7ad16978c13abe2bf2fb16806cef479

SHA1
0f52038a10f7a46a39b47f4ab51e335f201958fe

SHA256
ff142982efc116fcbb8229df294d304f1251f034cdf71f30a7412da95292f8f3

SHA512
e3997dc3bddeed956d13d5a63e1626c61671b5bde7531d08f9635570a4ab14ef194350ee1d83045d847d5b739cac859acfd843178f30d97ede07ed1bc40d02b7

Download Submit
C:\Users\Admin\AppData\Roaming\K07-R0E1\K07logrf.ini
Filesize
40B

MD5
2f245469795b865bdd1b956c23d7893d

SHA1
6ad80b974d3808f5a20ea1e766c7d2f88b9e5895

SHA256
1662d01a2d47b875a34fc7a8cd92e78cb2ba7f34023c7fd2639cbb10b8d94361

SHA512
909f189846a5d2db208a5eb2e7cb3042c0f164caf437e2b1b6de608c0a70e4f3510b81b85753dbeec1e211e6a83e6ea8c96aff896e9b6e8ed42014473a54dc4f

Download Submit
C:\Users\Admin\AppData\Roaming\K07-R0E1\K07logrg.ini
Filesize
38B

MD5
4aadf49fed30e4c9b3fe4a3dd6445ebe

SHA1
1e332822167c6f351b99615eada2c30a538ff037

SHA256
75034beb7bded9aeab5748f4592b9e1419256caec474065d43e531ec5cc21c56

SHA512
eb5b3908d5e7b43ba02165e092f05578f45f15a148b4c3769036aa542c23a0f7cd2bc2770cf4119a7e437de3f681d9e398511f69f66824c516d9b451bb95f945

Download Submit
C:\Users\Admin\AppData\Roaming\K07-R0E1\K07logri.ini
Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\K07-R0E1\K07logrv.ini
Filesize
872B

MD5
bbc41c78bae6c71e63cb544a6a284d94

SHA1
33f2c1d9fa0e9c99b80bc2500621e95af38b1f9a

SHA256
ee83c6bcea9353c74bfc0a7e739f3c4a765ace894470e09cdcdebba700b8d4cb

SHA512
0aea424b57adae3e14ad6491cab585f554b4dffe601b5a17bad6ee6177d2f0f995e419cde576e2d1782b9bddc0661aada11a2c9f1454ae625d9e3223635ec9f4

Download Submit
memory/1384-138-0x0000000000000000-mapping.dmp

Download
memory/2604-141-0x0000000002E50000-0x0000000002F7D000-memory.dmp

Filesize
1.2MB

Download
memory/2604-134-0x0000000002D60000-0x0000000002E4B000-memory.dmp

Filesize
940KB

Download
memory/2704-131-0x0000000000400000-0x00000000004C3000-memory.dmp

Filesize
780KB

Download
memory/2932-142-0x0000000000000000-mapping.dmp

Download
memory/3440-140-0x0000000002F00000-0x0000000002F93000-memory.dmp

Filesize
588KB

Download
memory/3440-139-0x0000000003000000-0x000000000334A000-memory.dmp

Filesize
3.3MB

Download
memory/3440-137-0x0000000000DF0000-0x0000000000E1D000-memory.dmp

Filesize
180KB

Download
memory/3440-136-0x0000000000F50000-0x0000000000F6F000-memory.dmp

Filesize
124KB

Download
memory/3440-135-0x0000000000000000-mapping.dmp

Download
memory/3604-130-0x0000000000000000-mapping.dmp

Download
memory/3604-133-0x00000000009C0000-0x00000000009D4000-memory.dmp

Filesize
80KB

Download
memory/3604-132-0x0000000000A10000-0x0000000000D5A000-memory.dmp

Filesize
3.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads