formbook | f02b9aaeb8bb7359fdd8fc85f693292d863a481eea4213e066661a35c52087fe

General

Target

PO_CS009.exe
Size

362KB
MD5

08b794da39ef13910c12b15e072c1edd
SHA1

b0e926330b4b67e823c2a12e9b8fa789a1b9291f
SHA256

4092b0f7ea14add16e6f6f35071b074458a19d4550af50a80ed5742cc7046568
SHA512

97822a1eb2197352f67037ec6b3c6cf8b0a54ebac288f84d3a254d1b1af2c53e2a5db4e3a13e91df80d4ce127a033485915e01f47fa0ecd6edd0d778655a0156

Score

10^/10

formbook q5e persistence rat rezer0 spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

q5e

Decoy

2177.ltd

thanxiety.com

max-width.com

fixti.net

mostmaj.com

mobilteknolojiuzmani.com

historyannals.com

wheelchairmotion.com

mossandmoonstonestudio.com

kastellifournis.com

axokey.net

peekl.com

metsteeshirt.com

abcfinancial-inc.com

btxrsp.com

amydh.com

ccoauthority.com

lumacorretora.com

kimfelixrealtor.com

iconext.biz

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/1516-60-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral1/memory/1516-61-0x000000000041E2A0-mapping.dmp	formbook
behavioral1/memory/1388-70-0x0000000000090000-0x00000000000BD000-memory.dmp	formbook

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1280-56-0x00000000047D0000-0x000000000480A000-memory.dmp	rezer0

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

604 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
604	cmd.exe

Adds 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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\TT88FTBP9B = "C:\\Program Files (x86)\\B9rbxnt\\msnbctzl70.exe"	rundll32.exe
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	rundll32.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

PO_CS009.exePO_CS009.exerundll32.exe

description	pid	process	target process
PID 1280 set thread context of 1516	1280	PO_CS009.exe	PO_CS009.exe
PID 1516 set thread context of 1212	1516	PO_CS009.exe	Explorer.EXE
PID 1388 set thread context of 1212	1388	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)\B9rbxnt\msnbctzl70.exe rundll32.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\B9rbxnt\msnbctzl70.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 18 IoCs

Processes:

PO_CS009.exerundll32.exe

pid	process
1516	PO_CS009.exe
1516	PO_CS009.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe
1388	rundll32.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

PO_CS009.exerundll32.exe

pid process

1516 PO_CS009.exe
1516 PO_CS009.exe
1516 PO_CS009.exe
1388 rundll32.exe
1388 rundll32.exe
1388 rundll32.exe
1388 rundll32.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PO_CS009.exerundll32.exe

description pid process

Token: SeDebugPrivilege 1516 PO_CS009.exe
Token: SeDebugPrivilege 1388 rundll32.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1212 Explorer.EXE
1212 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1516	PO_CS009.exe
Token: SeDebugPrivilege	1388	rundll32.exe

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

PO_CS009.exeExplorer.EXErundll32.exe

description	pid	process	target process
PID 1280 wrote to memory of 1516	1280	PO_CS009.exe	PO_CS009.exe
PID 1280 wrote to memory of 1516	1280	PO_CS009.exe	PO_CS009.exe
PID 1280 wrote to memory of 1516	1280	PO_CS009.exe	PO_CS009.exe
PID 1280 wrote to memory of 1516	1280	PO_CS009.exe	PO_CS009.exe
PID 1280 wrote to memory of 1516	1280	PO_CS009.exe	PO_CS009.exe
PID 1280 wrote to memory of 1516	1280	PO_CS009.exe	PO_CS009.exe
PID 1280 wrote to memory of 1516	1280	PO_CS009.exe	PO_CS009.exe
PID 1212 wrote to memory of 1388	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1388	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1388	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1388	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1388	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1388	1212	Explorer.EXE	rundll32.exe
PID 1212 wrote to memory of 1388	1212	Explorer.EXE	rundll32.exe
PID 1388 wrote to memory of 604	1388	rundll32.exe	cmd.exe
PID 1388 wrote to memory of 604	1388	rundll32.exe	cmd.exe
PID 1388 wrote to memory of 604	1388	rundll32.exe	cmd.exe
PID 1388 wrote to memory of 604	1388	rundll32.exe	cmd.exe
PID 1388 wrote to memory of 1576	1388	rundll32.exe	Firefox.exe
PID 1388 wrote to memory of 1576	1388	rundll32.exe	Firefox.exe
PID 1388 wrote to memory of 1576	1388	rundll32.exe	Firefox.exe
PID 1388 wrote to memory of 1576	1388	rundll32.exe	Firefox.exe
PID 1388 wrote to memory of 1576	1388	rundll32.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1212

C:\Users\Admin\AppData\Local\Temp\PO_CS009.exe
"C:\Users\Admin\AppData\Local\Temp\PO_CS009.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1280

C:\Users\Admin\AppData\Local\Temp\PO_CS009.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1516

C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\SysWOW64\rundll32.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:1388

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\PO_CS009.exe"
3⤵
- Deletes itself
PID:604

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1576

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

2

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\17MAR21T\17Mlogim.jpeg
Filesize
70KB

MD5
3f5ac482a0392a5796aaefe1eb14fe75

SHA1
7df22498858a2cc45fcc979990980e5416e5a29f

SHA256
05159fd6553b38299148575b3c5a73198905d678d1594bf2a9cd1f6bcb40717c

SHA512
6436e55b542b35aec31132083bf9b99f2b1a1d0128c2accfcf8581f64c3eae6193062fb39ef36de2f2fd463f07f8e00a405e256a3b49b2d5c137e44df041a207

Download Submit
C:\Users\Admin\AppData\Roaming\17MAR21T\17Mlogrf.ini
Filesize
40B

MD5
2f245469795b865bdd1b956c23d7893d

SHA1
6ad80b974d3808f5a20ea1e766c7d2f88b9e5895

SHA256
1662d01a2d47b875a34fc7a8cd92e78cb2ba7f34023c7fd2639cbb10b8d94361

SHA512
909f189846a5d2db208a5eb2e7cb3042c0f164caf437e2b1b6de608c0a70e4f3510b81b85753dbeec1e211e6a83e6ea8c96aff896e9b6e8ed42014473a54dc4f

Download Submit
C:\Users\Admin\AppData\Roaming\17MAR21T\17Mlogri.ini
Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\17MAR21T\17Mlogrv.ini
Filesize
40B

MD5
ba3b6bc807d4f76794c4b81b09bb9ba5

SHA1
24cb89501f0212ff3095ecc0aba97dd563718fb1

SHA256
6eebf968962745b2e9de2ca969af7c424916d4e3fe3cc0bb9b3d414abfce9507

SHA512
ecd07e601fc9e3cfc39addd7bd6f3d7f7ff3253afb40bf536e9eaac5a4c243e5ec40fbfd7b216cb0ea29f2517419601e335e33ba19dea4a46f65e38694d465bf

Download Submit
memory/604-68-0x0000000000000000-mapping.dmp

Download
memory/1212-73-0x0000000004210000-0x00000000042ED000-memory.dmp

Filesize
884KB

Download
memory/1212-65-0x0000000004BB0000-0x0000000004D49000-memory.dmp

Filesize
1.6MB

Download
memory/1280-55-0x00000000004C0000-0x00000000004D6000-memory.dmp

Filesize
88KB

Download
memory/1280-56-0x00000000047D0000-0x000000000480A000-memory.dmp

Filesize
232KB

Download
memory/1280-54-0x0000000000110000-0x0000000000170000-memory.dmp

Filesize
384KB

Download
memory/1388-71-0x0000000002200000-0x0000000002503000-memory.dmp

Filesize
3.0MB

Download
memory/1388-67-0x00000000756E1000-0x00000000756E3000-memory.dmp

Filesize
8KB

Download
memory/1388-66-0x0000000000000000-mapping.dmp

Download
memory/1388-69-0x00000000005F0000-0x00000000005FE000-memory.dmp

Filesize
56KB

Download
memory/1388-70-0x0000000000090000-0x00000000000BD000-memory.dmp

Filesize
180KB

Download
memory/1388-72-0x0000000000530000-0x00000000005C3000-memory.dmp

Filesize
588KB

Download
memory/1516-64-0x0000000000200000-0x0000000000214000-memory.dmp

Filesize
80KB

Download
memory/1516-63-0x0000000000AE0000-0x0000000000DE3000-memory.dmp

Filesize
3.0MB

Download
memory/1516-61-0x000000000041E2A0-mapping.dmp

Download
memory/1516-60-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1516-58-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1516-57-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads