formbook | f466700a7f45a812f832c3d869bd6453aef3a292f3e2cccc39b18e20a3e05203

General

Target

yeni sipari?.exe
Size

719KB
MD5

2209b47aae001d2bd001bfdefc337f68
SHA1

bb4984f3c1f8780069ec094b93668e9c45d65187
SHA256

ace900e217f27e8f699718623c3c2dcc7bf91337ff0ff91fc5a365a68fd7ba65
SHA512

d206f7aa864fce2e4592842fbd50b05ef937d756a1078884e6c19cf65adfe61e205b7e1a4f6350a503a323cda216036b7301919e7ec70aa6840edc2bed8b8ea0

Score

10^/10

formbook kvsz persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

kvsz

Decoy

krii8it.com

etroty.com

siliconetechsolutions.com

idoukang.net

jb5w3c.download

cmvtulancingo.com

duniageo.com

therisc.com

recruitwith-rr.com

liential.com

americavolcano.win

miyario.com

theballerinashoecompany.com

43u99.com

hananoame.com

wwwglowhaus.net

crowdcoins.biz

icograda.net

fujiansoles.com

bliss-okachimachi.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 2 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4152-140-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/256-148-0x0000000000EC0000-0x0000000000EED000-memory.dmp	formbook

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

NETSTAT.EXE

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	NETSTAT.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\3FOLG088 = "C:\\Program Files (x86)\\N4he\\mdfejzxd4h.exe"	NETSTAT.EXE

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

yeni sipari_.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	yeni sipari_.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

Suspicious use of SetThreadContext 3 IoCs

Processes:

yeni sipari_.exeRegSvcs.exeNETSTAT.EXE

description	pid	process	target process
PID 4684 set thread context of 4152	4684	yeni sipari_.exe	RegSvcs.exe
PID 4152 set thread context of 2092	4152	RegSvcs.exe	Explorer.EXE
PID 256 set thread context of 2092	256	NETSTAT.EXE	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

NETSTAT.EXE

description ioc process

File opened for modification C:\Program Files (x86)\N4he\mdfejzxd4h.exe NETSTAT.EXE
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4584 schtasks.exe
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command-Line Interface
T1059

Processes:

NETSTAT.EXE

pid process

256 NETSTAT.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\N4he\mdfejzxd4h.exe	NETSTAT.EXE

pid	process
4584	schtasks.exe

pid	process
256	NETSTAT.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

NETSTAT.EXE

description	ioc	process
Key created	\Registry\User\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 49 IoCs

Processes:

yeni sipari_.exeRegSvcs.exeNETSTAT.EXE

pid	process
4684	yeni sipari_.exe
4684	yeni sipari_.exe
4684	yeni sipari_.exe
4684	yeni sipari_.exe
4684	yeni sipari_.exe
4684	yeni sipari_.exe
4684	yeni sipari_.exe
4152	RegSvcs.exe
4152	RegSvcs.exe
4152	RegSvcs.exe
4152	RegSvcs.exe
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2092 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

RegSvcs.exeNETSTAT.EXE

pid process

4152 RegSvcs.exe
4152 RegSvcs.exe
4152 RegSvcs.exe
256 NETSTAT.EXE
256 NETSTAT.EXE
256 NETSTAT.EXE
256 NETSTAT.EXE

pid	process
2092	Explorer.EXE

pid	process
4152	RegSvcs.exe
4152	RegSvcs.exe
4152	RegSvcs.exe
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE
256	NETSTAT.EXE

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

yeni sipari_.exeRegSvcs.exeNETSTAT.EXEExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	4684	yeni sipari_.exe
Token: SeDebugPrivilege	4152	RegSvcs.exe
Token: SeDebugPrivilege	256	NETSTAT.EXE
Token: SeShutdownPrivilege	2092	Explorer.EXE
Token: SeCreatePagefilePrivilege	2092	Explorer.EXE
Token: SeShutdownPrivilege	2092	Explorer.EXE
Token: SeCreatePagefilePrivilege	2092	Explorer.EXE

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

yeni sipari_.exeExplorer.EXENETSTAT.EXE

description	pid	process	target process
PID 4684 wrote to memory of 4584	4684	yeni sipari_.exe	schtasks.exe
PID 4684 wrote to memory of 4584	4684	yeni sipari_.exe	schtasks.exe
PID 4684 wrote to memory of 4584	4684	yeni sipari_.exe	schtasks.exe
PID 4684 wrote to memory of 4600	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4600	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4600	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4616	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4616	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4616	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 2156	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 2156	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 2156	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4152	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4152	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4152	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4152	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4152	4684	yeni sipari_.exe	RegSvcs.exe
PID 4684 wrote to memory of 4152	4684	yeni sipari_.exe	RegSvcs.exe
PID 2092 wrote to memory of 256	2092	Explorer.EXE	NETSTAT.EXE
PID 2092 wrote to memory of 256	2092	Explorer.EXE	NETSTAT.EXE
PID 2092 wrote to memory of 256	2092	Explorer.EXE	NETSTAT.EXE
PID 256 wrote to memory of 2168	256	NETSTAT.EXE	cmd.exe
PID 256 wrote to memory of 2168	256	NETSTAT.EXE	cmd.exe
PID 256 wrote to memory of 2168	256	NETSTAT.EXE	cmd.exe
PID 256 wrote to memory of 5084	256	NETSTAT.EXE	cmd.exe
PID 256 wrote to memory of 5084	256	NETSTAT.EXE	cmd.exe
PID 256 wrote to memory of 5084	256	NETSTAT.EXE	cmd.exe
PID 256 wrote to memory of 3788	256	NETSTAT.EXE	Firefox.exe
PID 256 wrote to memory of 3788	256	NETSTAT.EXE	Firefox.exe
PID 256 wrote to memory of 3788	256	NETSTAT.EXE	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2092

C:\Users\Admin\AppData\Local\Temp\yeni sipari_.exe
"C:\Users\Admin\AppData\Local\Temp\yeni sipari_.exe"
2⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4684

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GxWnILgHDUGmOF" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4E2F.tmp"
3⤵
- Creates scheduled task(s)
PID:4584

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
3⤵
PID:4600

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
3⤵
PID:4616

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
3⤵
PID:2156

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:4152

C:\Windows\SysWOW64\NETSTAT.EXE
"C:\Windows\SysWOW64\NETSTAT.EXE"
2⤵
- Adds policy 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:256

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
3⤵
PID:2168

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:5084

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:3788

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Command-Line Interface

1

T1059

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

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\Local\Temp\tmp4E2F.tmp
Filesize
1KB

MD5
76831e736260c805f4a40fd35b828091

SHA1
3b642b5e429f782c973311bb8e47e815e1424ad7

SHA256
befa43749061f3589b839da20aaf4cdb9623deff6f7745fa2f380cbe9914d338

SHA512
48160641d2e821241f62a6538eff5adc29eeebab32ddfcbf5b31e31459f3270e1994bce1ce9bcf387dc5e46d790102ef2675829059bd855537e60ac433b300c1

Download Submit
C:\Users\Admin\AppData\Roaming\4-6P1RQE\4-6logim.jpeg
Filesize
75KB

MD5
01ac20ebc5d1657d02a2f8c5319a92bb

SHA1
ae5e4d6b1256069aeb38df784c2c60f5b27a5a79

SHA256
e3c576ceac24c5e14804d5fa46c9fc4e6e49cb04ae8ee620463a07a58fede8aa

SHA512
b5628b3a69e8d43e7ec2bd4045efe939512d8ec65ff2b92d8525b9c21fdf6fb5b5adff8b1b802c14073b69027aaa2b09345f942b8ba51564282881e44336419f

Download Submit
C:\Users\Admin\AppData\Roaming\4-6P1RQE\4-6logrf.ini
Filesize
40B

MD5
2f245469795b865bdd1b956c23d7893d

SHA1
6ad80b974d3808f5a20ea1e766c7d2f88b9e5895

SHA256
1662d01a2d47b875a34fc7a8cd92e78cb2ba7f34023c7fd2639cbb10b8d94361

SHA512
909f189846a5d2db208a5eb2e7cb3042c0f164caf437e2b1b6de608c0a70e4f3510b81b85753dbeec1e211e6a83e6ea8c96aff896e9b6e8ed42014473a54dc4f

Download Submit
C:\Users\Admin\AppData\Roaming\4-6P1RQE\4-6logrg.ini
Filesize
38B

MD5
4aadf49fed30e4c9b3fe4a3dd6445ebe

SHA1
1e332822167c6f351b99615eada2c30a538ff037

SHA256
75034beb7bded9aeab5748f4592b9e1419256caec474065d43e531ec5cc21c56

SHA512
eb5b3908d5e7b43ba02165e092f05578f45f15a148b4c3769036aa542c23a0f7cd2bc2770cf4119a7e437de3f681d9e398511f69f66824c516d9b451bb95f945

Download Submit
C:\Users\Admin\AppData\Roaming\4-6P1RQE\4-6logri.ini
Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\4-6P1RQE\4-6logrv.ini
Filesize
872B

MD5
bbc41c78bae6c71e63cb544a6a284d94

SHA1
33f2c1d9fa0e9c99b80bc2500621e95af38b1f9a

SHA256
ee83c6bcea9353c74bfc0a7e739f3c4a765ace894470e09cdcdebba700b8d4cb

SHA512
0aea424b57adae3e14ad6491cab585f554b4dffe601b5a17bad6ee6177d2f0f995e419cde576e2d1782b9bddc0661aada11a2c9f1454ae625d9e3223635ec9f4

Download Submit
memory/256-150-0x0000000001470000-0x0000000001503000-memory.dmp

Filesize
588KB

Download
memory/256-149-0x00000000017D0000-0x0000000001B1A000-memory.dmp

Filesize
3.3MB

Download
memory/256-147-0x0000000000590000-0x000000000059B000-memory.dmp

Filesize
44KB

Download
memory/256-148-0x0000000000EC0000-0x0000000000EED000-memory.dmp

Filesize
180KB

Download
memory/256-145-0x0000000000000000-mapping.dmp

Download
memory/2092-151-0x00000000077F0000-0x000000000793D000-memory.dmp

Filesize
1.3MB

Download
memory/2092-144-0x0000000002900000-0x00000000029C0000-memory.dmp

Filesize
768KB

Download
memory/2156-138-0x0000000000000000-mapping.dmp

Download
memory/2168-146-0x0000000000000000-mapping.dmp

Download
memory/4152-143-0x0000000001440000-0x0000000001454000-memory.dmp

Filesize
80KB

Download
memory/4152-142-0x00000000014E0000-0x000000000182A000-memory.dmp

Filesize
3.3MB

Download
memory/4152-140-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/4152-139-0x0000000000000000-mapping.dmp

Download
memory/4584-134-0x0000000000000000-mapping.dmp

Download
memory/4600-136-0x0000000000000000-mapping.dmp

Download
memory/4616-137-0x0000000000000000-mapping.dmp

Download
memory/4684-130-0x00000000004F0000-0x00000000005AA000-memory.dmp

Filesize
744KB

Download
memory/4684-133-0x0000000005BE0000-0x0000000006184000-memory.dmp

Filesize
5.6MB

Download
memory/4684-132-0x0000000005020000-0x00000000050B2000-memory.dmp

Filesize
584KB

Download
memory/4684-131-0x0000000004EE0000-0x0000000004F7C000-memory.dmp

Filesize
624KB

Download
memory/5084-152-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads