formbook | c910b0c026aced55235b98818dce27b57f6a5d55fdc93efa234e9b0aae4eb6fb

General

Target

RFQ_august.exe
Size

756KB
MD5

f5bf9905ff7c573695fe1e53a1338e5c
SHA1

1d531327f162c4bb844f42694fe5da4f95dc9510
SHA256

e6ef5385235001a8743ac0ee83f839abdd66abed79cff1429020270168bd9357
SHA512

f382aa021ee9ece8ea92fda10391bb540b11f9c172f76c85745b12169de1d9aec0edd8a9649d6033edf5c049c98ff00f6b605b604482d1b25cf343536edba17e

Score

10^/10

formbook emh persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

emh

Decoy

sweetmiya.com

zsyzm.com

carpediem.immo

sparkconfections.com

oliverezechi.net

wearephoenixtraining.com

artistxpressions.com

kesfetmeninkeyfi.com

kasvomaskitnetista.com

mertzlife.com

vcbuild.world

mwessentialcleaningservice.com

fairresale.com

dermot.online

impentri.com

bestsanitizingservice.com

210wscottstj.info

camilafinale.com

pepperhaul.com

centrobiblicomoradasanta.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

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1672-62-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral1/memory/1672-63-0x000000000041E340-mapping.dmp	formbook
behavioral1/memory/1964-72-0x0000000000090000-0x00000000000BD000-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:

rundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\YXSDLRU8N = "C:\\Program Files (x86)\\Rsbu\\updaten0exv.exe"	rundll32.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1956 cmd.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
1956	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

RFQ_august.exeRFQ_august.exerundll32.exe

description	pid	process	target process
PID 1856 set thread context of 1672	1856	RFQ_august.exe	RFQ_august.exe
PID 1672 set thread context of 1248	1672	RFQ_august.exe	Explorer.EXE
PID 1964 set thread context of 1248	1964	rundll32.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Program Files (x86)\Rsbu\updaten0exv.exe rundll32.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Rsbu\updaten0exv.exe	rundll32.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

rundll32.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-790309383-526510583-3802439154-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	rundll32.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

RFQ_august.exeRFQ_august.exerundll32.exe

pid	process
1856	RFQ_august.exe
1672	RFQ_august.exe
1672	RFQ_august.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

RFQ_august.exerundll32.exe

pid process

1672 RFQ_august.exe
1672 RFQ_august.exe
1672 RFQ_august.exe
1964 rundll32.exe
1964 rundll32.exe
1964 rundll32.exe
1964 rundll32.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

RFQ_august.exeRFQ_august.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1856 RFQ_august.exe
Token: SeDebugPrivilege 1672 RFQ_august.exe
Token: SeDebugPrivilege 1964 rundll32.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
1248 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1248 Explorer.EXE
1248 Explorer.EXE

pid	process
1672	RFQ_august.exe
1672	RFQ_august.exe
1672	RFQ_august.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe
1964	rundll32.exe

description	pid	process
Token: SeDebugPrivilege	1856	RFQ_august.exe
Token: SeDebugPrivilege	1672	RFQ_august.exe
Token: SeDebugPrivilege	1964	rundll32.exe

pid	process
1248	Explorer.EXE
1248	Explorer.EXE

pid	process
1248	Explorer.EXE
1248	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

RFQ_august.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 1856 wrote to memory of 1672	1856	RFQ_august.exe	RFQ_august.exe
PID 1856 wrote to memory of 1672	1856	RFQ_august.exe	RFQ_august.exe
PID 1856 wrote to memory of 1672	1856	RFQ_august.exe	RFQ_august.exe
PID 1856 wrote to memory of 1672	1856	RFQ_august.exe	RFQ_august.exe
PID 1856 wrote to memory of 1672	1856	RFQ_august.exe	RFQ_august.exe
PID 1856 wrote to memory of 1672	1856	RFQ_august.exe	RFQ_august.exe
PID 1856 wrote to memory of 1672	1856	RFQ_august.exe	RFQ_august.exe
PID 1248 wrote to memory of 1964	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 1964	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 1964	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 1964	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 1964	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 1964	1248	Explorer.EXE	rundll32.exe
PID 1248 wrote to memory of 1964	1248	Explorer.EXE	rundll32.exe
PID 1964 wrote to memory of 1956	1964	rundll32.exe	cmd.exe
PID 1964 wrote to memory of 1956	1964	rundll32.exe	cmd.exe
PID 1964 wrote to memory of 1956	1964	rundll32.exe	cmd.exe
PID 1964 wrote to memory of 1956	1964	rundll32.exe	cmd.exe
PID 1964 wrote to memory of 1920	1964	rundll32.exe	Firefox.exe
PID 1964 wrote to memory of 1920	1964	rundll32.exe	Firefox.exe
PID 1964 wrote to memory of 1920	1964	rundll32.exe	Firefox.exe
PID 1964 wrote to memory of 1920	1964	rundll32.exe	Firefox.exe
PID 1964 wrote to memory of 1920	1964	rundll32.exe	Firefox.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

rundll32.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer rundll32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	rundll32.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1248

C:\Users\Admin\AppData\Local\Temp\RFQ_august.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ_august.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1856

C:\Users\Admin\AppData\Local\Temp\RFQ_august.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ_august.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1672

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\SysWOW64\rundll32.exe"
2⤵
- Adds policy 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
- System policy modification
PID:1964

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\RFQ_august.exe"
3⤵
- Deletes itself
PID:1956

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1920

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

3

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\690A776U\690logim.jpeg
Filesize
67KB

MD5
468e98dea14e0a4ef229fe406690db6d

SHA1
48b399fd501e78f158998870ddc8bdb12feaba0b

SHA256
690072cde17e3bc1befff100e2acad0bbc1ccd10cd75c4b9a8e398efe780daf2

SHA512
92937a90e26f9e4de76f4bb5874581fc68412fa001aec9abc211995ca50793598ce6f04ec6cce7a8ffd37e65bd778df13d25c5da65e7b59dd50ce8d1c1f5865c

Download Submit
C:\Users\Admin\AppData\Roaming\690A776U\690logrf.ini
Filesize
40B

MD5
2f245469795b865bdd1b956c23d7893d

SHA1
6ad80b974d3808f5a20ea1e766c7d2f88b9e5895

SHA256
1662d01a2d47b875a34fc7a8cd92e78cb2ba7f34023c7fd2639cbb10b8d94361

SHA512
909f189846a5d2db208a5eb2e7cb3042c0f164caf437e2b1b6de608c0a70e4f3510b81b85753dbeec1e211e6a83e6ea8c96aff896e9b6e8ed42014473a54dc4f

Download Submit
C:\Users\Admin\AppData\Roaming\690A776U\690logri.ini
Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\690A776U\690logrv.ini
Filesize
40B

MD5
ba3b6bc807d4f76794c4b81b09bb9ba5

SHA1
24cb89501f0212ff3095ecc0aba97dd563718fb1

SHA256
6eebf968962745b2e9de2ca969af7c424916d4e3fe3cc0bb9b3d414abfce9507

SHA512
ecd07e601fc9e3cfc39addd7bd6f3d7f7ff3253afb40bf536e9eaac5a4c243e5ec40fbfd7b216cb0ea29f2517419601e335e33ba19dea4a46f65e38694d465bf

Download Submit
memory/1248-67-0x00000000040D0000-0x0000000004214000-memory.dmp

Filesize
1.3MB

Download
memory/1248-75-0x0000000006070000-0x000000000613A000-memory.dmp

Filesize
808KB

Download
memory/1672-66-0x0000000000180000-0x0000000000194000-memory.dmp

Filesize
80KB

Download
memory/1672-59-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1672-63-0x000000000041E340-mapping.dmp

Download
memory/1672-65-0x0000000000A00000-0x0000000000D03000-memory.dmp

Filesize
3.0MB

Download
memory/1672-62-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1672-60-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1856-58-0x0000000000C60000-0x0000000000CA2000-memory.dmp

Filesize
264KB

Download
memory/1856-54-0x00000000012B0000-0x0000000001372000-memory.dmp

Filesize
776KB

Download
memory/1856-57-0x0000000005770000-0x00000000057DE000-memory.dmp

Filesize
440KB

Download
memory/1856-56-0x0000000000960000-0x0000000000970000-memory.dmp

Filesize
64KB

Download
memory/1856-55-0x0000000075CE1000-0x0000000075CE3000-memory.dmp

Filesize
8KB

Download
memory/1956-70-0x0000000000000000-mapping.dmp

Download
memory/1964-71-0x0000000000760000-0x000000000076E000-memory.dmp

Filesize
56KB

Download
memory/1964-72-0x0000000000090000-0x00000000000BD000-memory.dmp

Filesize
180KB

Download
memory/1964-73-0x0000000002020000-0x0000000002323000-memory.dmp

Filesize
3.0MB

Download
memory/1964-74-0x0000000001E90000-0x0000000001F23000-memory.dmp

Filesize
588KB

Download
memory/1964-68-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads