formbook | cf9565db0c7e242dafc592fd88893bf46a3201a17372675fef4cfcbd558d1c5b

Analysis

max time kernel
147s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 05:20

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General

Target

$PLUGINSDIR/yfvmdnif.dll
Size

33KB
MD5

c6f46b711b17ddbcb63a52552f1545fd
SHA1

7f0cf73617829660b06ead76dc37db322f48a565
SHA256

fd1e3db80099afb4fad792e226d1055b350ee96286633a356926b7ac180932b0
SHA512

25862ccaab810ba1ac3c58b12aa8c114d25436f3f5273c4c59621044b398aa98f4d40569e5232aeaf1ef41c4e396ad172faa71de92aae8d196ad947666cc94f7
SSDEEP

384:SvrHKBoZA+9KuEWQZkVI4m9Vgf+1qzBzbEBehy8k/xwA9oKH9uQJcVre7:SawR9lQOVXO1qlbty8k/xhoiu6cV8

Score

10^/10

formbook dn7r rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

dn7r

Decoy

eventphotographerdfw.com

thehalalcoinstaking.com

philipfaziofineart.com

intercoh.com

gaiaseyephotography.com

chatbotforrealestate.com

lovelancemg.com

marlieskasberger.com

elcongoenespanol.info

lepirecredit.com

distribution-concept.com

e99game.com

exit11festival.com

twodollartoothbrushclub.com

cocktailsandlawn.com

performimprove.network

24horas-telefono-11840.com

cosmossify.com

kellenleote.com

perovskite.energy

Signatures

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

Formbook payload 4 IoCs

rat

resource	yara_rule
behavioral4/memory/3620-1-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral4/memory/3620-5-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral4/memory/1576-10-0x0000000000A70000-0x0000000000A9F000-memory.dmp	formbook
behavioral4/memory/1576-12-0x0000000000A70000-0x0000000000A9F000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4564 set thread context of 3620	4564	rundll32.exe	88
PID 3620 set thread context of 3344	3620	rundll32.exe	57
PID 1576 set thread context of 3344	1576	chkdsk.exe	57

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 60 IoCs

pid	Process
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe
1576	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
3620	rundll32.exe
3620	rundll32.exe
3620	rundll32.exe
1576	chkdsk.exe
1576	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3620	rundll32.exe
Token: SeDebugPrivilege	1576	chkdsk.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3344	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4476 wrote to memory of 4564	4476	rundll32.exe	85
PID 4476 wrote to memory of 4564	4476	rundll32.exe	85
PID 4476 wrote to memory of 4564	4476	rundll32.exe	85
PID 4564 wrote to memory of 3620	4564	rundll32.exe	88
PID 4564 wrote to memory of 3620	4564	rundll32.exe	88
PID 4564 wrote to memory of 3620	4564	rundll32.exe	88
PID 4564 wrote to memory of 3620	4564	rundll32.exe	88
PID 4564 wrote to memory of 3620	4564	rundll32.exe	88
PID 4564 wrote to memory of 3620	4564	rundll32.exe	88
PID 3344 wrote to memory of 1576	3344	Explorer.EXE	90
PID 3344 wrote to memory of 1576	3344	Explorer.EXE	90
PID 3344 wrote to memory of 1576	3344	Explorer.EXE	90
PID 1576 wrote to memory of 4316	1576	chkdsk.exe	95
PID 1576 wrote to memory of 4316	1576	chkdsk.exe	95
PID 1576 wrote to memory of 4316	1576	chkdsk.exe	95

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3344
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\yfvmdnif.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4476
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\yfvmdnif.dll,#1
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4564
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\yfvmdnif.dll,#1
      4⤵
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:3620
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1576
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    PID:4316

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1576-14-0x00000000010A0000-0x0000000001134000-memory.dmp

Filesize
592KB

Download
memory/1576-11-0x0000000001360000-0x00000000016AA000-memory.dmp

Filesize
3.3MB

Download
memory/1576-12-0x0000000000A70000-0x0000000000A9F000-memory.dmp

Filesize
188KB

Download
memory/1576-8-0x00000000005C0000-0x00000000005CA000-memory.dmp

Filesize
40KB

Download
memory/1576-9-0x00000000005C0000-0x00000000005CA000-memory.dmp

Filesize
40KB

Download
memory/1576-10-0x0000000000A70000-0x0000000000A9F000-memory.dmp

Filesize
188KB

Download
memory/3344-7-0x0000000008B30000-0x0000000008CB2000-memory.dmp

Filesize
1.5MB

Download
memory/3344-17-0x0000000002A50000-0x0000000002B40000-memory.dmp

Filesize
960KB

Download
memory/3344-18-0x0000000002A50000-0x0000000002B40000-memory.dmp

Filesize
960KB

Download
memory/3344-21-0x0000000002A50000-0x0000000002B40000-memory.dmp

Filesize
960KB

Download
memory/3620-6-0x0000000002980000-0x0000000002995000-memory.dmp

Filesize
84KB

Download
memory/3620-5-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3620-3-0x0000000002A80000-0x0000000002DCA000-memory.dmp

Filesize
3.3MB

Download
memory/3620-1-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4564-2-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download
memory/4564-0-0x0000000010000000-0x000000001000B000-memory.dmp

Filesize
44KB

Download