formbook | a7ac86859df3916a97fb2dff315541ad5f53075a6d4d6f151478ff083192ea24

General

Target

RFQ#7018.exe
Size

304KB
MD5

ff63351b26aa98482e65c848d3c81dba
SHA1

a12eac529a3e6f4f54ef3132077ede6fadac14ee
SHA256

e2234312d9f3cca21a317e8fddb427b2dd315cd69f9c1cc3606016c154fa4182
SHA512

656a29f833f50921196bcee13f39ad6eb2c2f7f4aaedf471b3517d6b366354579e3f103d2e2ac3c398b5a1be647149825d58f240defd07a430a6aa3f811fedd5

Score

10^/10

formbook 20w coreentity rat rezer0 spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

3.9

Campaign

20w

Decoy

cofounder.technology

mrbajaf.com

xn--w9s874cfjq5fk.com

haliciogluhali.net

vanessadunfordhere.com

lookguy.win

91javac.com

goldennd.com

nwatheeliteteam.net

tumpukganda.com

clarservicios.com

koghana.com

workingwithroland.com

yellowsocialbox.com

under-dawg.com

sdtjtzyz.com

banditaerialproductions.com

newssmog.com

tefnmp.men

rebelialabel.com

Signatures

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

Processes:

resource	yara_rule
behavioral1/memory/1640-56-0x00000000002F0000-0x00000000002F8000-memory.dmp	coreentity

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

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1256-63-0x0000000000400000-0x000000000042A000-memory.dmp	formbook
behavioral1/memory/1256-64-0x000000000041B680-mapping.dmp	formbook
behavioral1/memory/2032-72-0x0000000000080000-0x00000000000AA000-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/1640-57-0x0000000001F10000-0x0000000001F48000-memory.dmp	rezer0

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1996 cmd.exe

pid	process
1996	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

RFQ#7018.exeRFQ#7018.execmd.exe

description	pid	process	target process
PID 1640 set thread context of 1256	1640	RFQ#7018.exe	RFQ#7018.exe
PID 1256 set thread context of 1212	1256	RFQ#7018.exe	Explorer.EXE
PID 2032 set thread context of 1212	2032	cmd.exe	Explorer.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

964 schtasks.exe

pid	process
964	schtasks.exe

Suspicious behavior: EnumeratesProcesses 27 IoCs

Processes:

RFQ#7018.execmd.exe

pid	process
1256	RFQ#7018.exe
1256	RFQ#7018.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe
2032	cmd.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

RFQ#7018.execmd.exe

pid process

1256 RFQ#7018.exe
1256 RFQ#7018.exe
1256 RFQ#7018.exe
2032 cmd.exe
2032 cmd.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

RFQ#7018.execmd.exe

description pid process

Token: SeDebugPrivilege 1256 RFQ#7018.exe
Token: SeDebugPrivilege 2032 cmd.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	1256	RFQ#7018.exe
Token: SeDebugPrivilege	2032	cmd.exe

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

pid	process
1212	Explorer.EXE
1212	Explorer.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

RFQ#7018.exeExplorer.EXEcmd.exe

description	pid	process	target process
PID 1640 wrote to memory of 964	1640	RFQ#7018.exe	schtasks.exe
PID 1640 wrote to memory of 964	1640	RFQ#7018.exe	schtasks.exe
PID 1640 wrote to memory of 964	1640	RFQ#7018.exe	schtasks.exe
PID 1640 wrote to memory of 964	1640	RFQ#7018.exe	schtasks.exe
PID 1640 wrote to memory of 1256	1640	RFQ#7018.exe	RFQ#7018.exe
PID 1640 wrote to memory of 1256	1640	RFQ#7018.exe	RFQ#7018.exe
PID 1640 wrote to memory of 1256	1640	RFQ#7018.exe	RFQ#7018.exe
PID 1640 wrote to memory of 1256	1640	RFQ#7018.exe	RFQ#7018.exe
PID 1640 wrote to memory of 1256	1640	RFQ#7018.exe	RFQ#7018.exe
PID 1640 wrote to memory of 1256	1640	RFQ#7018.exe	RFQ#7018.exe
PID 1640 wrote to memory of 1256	1640	RFQ#7018.exe	RFQ#7018.exe
PID 1212 wrote to memory of 2032	1212	Explorer.EXE	cmd.exe
PID 1212 wrote to memory of 2032	1212	Explorer.EXE	cmd.exe
PID 1212 wrote to memory of 2032	1212	Explorer.EXE	cmd.exe
PID 1212 wrote to memory of 2032	1212	Explorer.EXE	cmd.exe
PID 2032 wrote to memory of 1996	2032	cmd.exe	cmd.exe
PID 2032 wrote to memory of 1996	2032	cmd.exe	cmd.exe
PID 2032 wrote to memory of 1996	2032	cmd.exe	cmd.exe
PID 2032 wrote to memory of 1996	2032	cmd.exe	cmd.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\RFQ#7018.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ#7018.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1640

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\RIEsscrX" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5294.tmp"
3⤵
- Creates scheduled task(s)
PID:964

C:\Users\Admin\AppData\Local\Temp\RFQ#7018.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1256

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\SysWOW64\cmd.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\RFQ#7018.exe"
3⤵
- Deletes itself
PID:1996

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp5294.tmp
Filesize
1KB

MD5
b07a53c6fc8fc5fc83a5733cfca6a41e

SHA1
16c91ab6f7c6316068c885662ec5e688ecea5015

SHA256
cab014bd9d149ccba1b7bdc9d3018f6e7fedf754726f45a162eeeaa9ecd3e594

SHA512
8be43911501213272d01e59cb6de2b14adbd395b8797eae791ede419ce57b5166401b065b4ab0a5446833c3fdfda8998612970a7f943ecdc7c103ec10e921a96

Download Submit
memory/964-58-0x0000000000000000-mapping.dmp

Download
memory/1212-75-0x0000000004C10000-0x0000000004D32000-memory.dmp

Filesize
1.1MB

Download
memory/1212-68-0x0000000004A60000-0x0000000004B42000-memory.dmp

Filesize
904KB

Download
memory/1256-66-0x0000000000860000-0x0000000000B63000-memory.dmp

Filesize
3.0MB

Download
memory/1256-67-0x0000000000390000-0x00000000003A4000-memory.dmp

Filesize
80KB

Download
memory/1256-60-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1256-61-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1256-63-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/1256-64-0x000000000041B680-mapping.dmp

Download
memory/1640-54-0x0000000000190000-0x00000000001E2000-memory.dmp

Filesize
328KB

Download
memory/1640-57-0x0000000001F10000-0x0000000001F48000-memory.dmp

Filesize
224KB

Download
memory/1640-56-0x00000000002F0000-0x00000000002F8000-memory.dmp

Filesize
32KB

Download
memory/1640-55-0x0000000075AE1000-0x0000000075AE3000-memory.dmp

Filesize
8KB

Download
memory/1996-70-0x0000000000000000-mapping.dmp

Download
memory/2032-69-0x0000000000000000-mapping.dmp

Download
memory/2032-71-0x000000004A8B0000-0x000000004A8FC000-memory.dmp

Filesize
304KB

Download
memory/2032-72-0x0000000000080000-0x00000000000AA000-memory.dmp

Filesize
168KB

Download
memory/2032-73-0x0000000002120000-0x0000000002423000-memory.dmp

Filesize
3.0MB

Download
memory/2032-74-0x0000000001E50000-0x0000000001EE3000-memory.dmp

Filesize
588KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads