formbook | 3a2e31f2844df5cb91eedbf24c0b93de4b0aa08525f733132c2bce0d7ab81acc

Resubmissions

21-12-2024 22:57

241221-2xpr2atjar 10

21-12-2024 20:29

241221-y9xfvsyngy 10

Analysis

max time kernel
46s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
21-12-2024 22:57

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe
Size

647KB
MD5

92e6f05295ae825d4f3d9982a616b98e
SHA1

eb73f950397f919df73442f66cbd15deee931cea
SHA256

10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1
SHA512

100e49ead6c63aba1470ebad85d969310741cc6d7c8d974551ffa07aa1923dec4f4153d363387328c493198ad98bf7535f2f4e138203daa3849ca28f265a3243
SSDEEP

12288:rYK4r6syCKHtudgQcEfCUkNNvshJGxnLeFnQ:rYK4RNKCcg1knvsh45LeFnQ

Score

10^/10

formbook a20e discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

a20e

Decoy

pushkarinidigital.com

e-shiryoku.com

sendmeblog.website

arniepalmer.com

tinnnitin.click

serummoctoc.online

chmoptk.xyz

kidskarpentry.com

wanglin123.com

onlinecannabis24dispensary.com

hkwx8.com

marcrosenkrans.com

bridginglegal.com

a2r2.cyou

app365e.com

semesta.xyz

encuentratucasacr.com

huiyusc58.com

carnivalofmiami.com

functionalbreeze.com

Signatures

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

Formbook payload 1 IoCs

rat

resource	yara_rule
behavioral16/memory/2920-36-0x0000000000400000-0x000000000042F000-memory.dmp	formbook

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2844	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4824 set thread context of 2920	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	82

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
3180	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2844	powershell.exe
2844	powershell.exe
2920	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe
2920	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2844	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4824 wrote to memory of 2844	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	78
PID 4824 wrote to memory of 2844	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	78
PID 4824 wrote to memory of 2844	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	78
PID 4824 wrote to memory of 3180	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	80
PID 4824 wrote to memory of 3180	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	80
PID 4824 wrote to memory of 3180	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	80
PID 4824 wrote to memory of 2920	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	82
PID 4824 wrote to memory of 2920	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	82
PID 4824 wrote to memory of 2920	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	82
PID 4824 wrote to memory of 2920	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	82
PID 4824 wrote to memory of 2920	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	82
PID 4824 wrote to memory of 2920	4824	10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe	82

C:\Users\Admin\AppData\Local\Temp\10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe
"C:\Users\Admin\AppData\Local\Temp\10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4824
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\AcsxnldqTkS.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2844
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AcsxnldqTkS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6453.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3180
- C:\Users\Admin\AppData\Local\Temp\10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe
  "C:\Users\Admin\AppData\Local\Temp\10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_txrmyk4h.1kl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp6453.tmp

Filesize
1KB

MD5
f54190872f97b9ba35c61c38bdab1d1c

SHA1
4d7089c426baeae91d6b8a55218eb999674872c6

SHA256
e658c84b06487192a27a97a55ea316a88564d883df6c0ce4bf55094b9e46f53e

SHA512
97a11bc27542cf4e545442df8d6c4572dffdd1dace72b79a3add09c14991b1d2684571dc95b4218d1d34f117251c1b22a38616e6face659a487bb40d9cc6901c

Download Submit
memory/2844-55-0x0000000005200000-0x0000000005210000-memory.dmp

Filesize
64KB

Download
memory/2844-65-0x0000000007C10000-0x0000000007C18000-memory.dmp

Filesize
32KB

Download
memory/2844-68-0x0000000074280000-0x0000000074A31000-memory.dmp

Filesize
7.7MB

Download
memory/2844-64-0x0000000007C20000-0x0000000007C3A000-memory.dmp

Filesize
104KB

Download
memory/2844-63-0x0000000007B20000-0x0000000007B35000-memory.dmp

Filesize
84KB

Download
memory/2844-62-0x0000000007B10000-0x0000000007B1E000-memory.dmp

Filesize
56KB

Download
memory/2844-61-0x0000000007AE0000-0x0000000007AF1000-memory.dmp

Filesize
68KB

Download
memory/2844-60-0x0000000007B60000-0x0000000007BF6000-memory.dmp

Filesize
600KB

Download
memory/2844-59-0x0000000007950000-0x000000000795A000-memory.dmp

Filesize
40KB

Download
memory/2844-58-0x00000000078D0000-0x00000000078EA000-memory.dmp

Filesize
104KB

Download
memory/2844-57-0x0000000007F30000-0x00000000085AA000-memory.dmp

Filesize
6.5MB

Download
memory/2844-56-0x00000000077A0000-0x0000000007844000-memory.dmp

Filesize
656KB

Download
memory/2844-18-0x0000000002DB0000-0x0000000002DE6000-memory.dmp

Filesize
216KB

Download
memory/2844-19-0x0000000074280000-0x0000000074A31000-memory.dmp

Filesize
7.7MB

Download
memory/2844-20-0x0000000005840000-0x0000000005E6A000-memory.dmp

Filesize
6.2MB

Download
memory/2844-21-0x0000000074280000-0x0000000074A31000-memory.dmp

Filesize
7.7MB

Download
memory/2844-22-0x0000000074280000-0x0000000074A31000-memory.dmp

Filesize
7.7MB

Download
memory/2844-53-0x0000000006B80000-0x0000000006B9E000-memory.dmp

Filesize
120KB

Download
memory/2844-24-0x0000000005EE0000-0x0000000005F46000-memory.dmp

Filesize
408KB

Download
memory/2844-54-0x0000000005200000-0x0000000005210000-memory.dmp

Filesize
64KB

Download
memory/2844-44-0x0000000074B30000-0x0000000074B7C000-memory.dmp

Filesize
304KB

Download
memory/2844-35-0x00000000060F0000-0x0000000006447000-memory.dmp

Filesize
3.3MB

Download
memory/2844-43-0x0000000007550000-0x0000000007584000-memory.dmp

Filesize
208KB

Download
memory/2844-42-0x000000007FDC0000-0x000000007FDD0000-memory.dmp

Filesize
64KB

Download
memory/2844-23-0x00000000056E0000-0x0000000005702000-memory.dmp

Filesize
136KB

Download
memory/2844-41-0x00000000065D0000-0x000000000661C000-memory.dmp

Filesize
304KB

Download
memory/2844-40-0x0000000006590000-0x00000000065AE000-memory.dmp

Filesize
120KB

Download
memory/2920-39-0x0000000001260000-0x00000000015B6000-memory.dmp

Filesize
3.3MB

Download
memory/2920-36-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4824-4-0x0000000074280000-0x0000000074A31000-memory.dmp

Filesize
7.7MB

Download
memory/4824-10-0x00000000053B0000-0x00000000053BC000-memory.dmp

Filesize
48KB

Download
memory/4824-0-0x000000007428E000-0x000000007428F000-memory.dmp

Filesize
4KB

Download
memory/4824-2-0x0000000005980000-0x0000000005F26000-memory.dmp

Filesize
5.6MB

Download
memory/4824-38-0x0000000074280000-0x0000000074A31000-memory.dmp

Filesize
7.7MB

Download
memory/4824-3-0x00000000050C0000-0x0000000005152000-memory.dmp

Filesize
584KB

Download
memory/4824-5-0x0000000005180000-0x000000000518A000-memory.dmp

Filesize
40KB

Download
memory/4824-1-0x0000000000570000-0x0000000000618000-memory.dmp

Filesize
672KB

Download
memory/4824-11-0x000000000A2F0000-0x000000000A37E000-memory.dmp

Filesize
568KB

Download
memory/4824-9-0x0000000074280000-0x0000000074A31000-memory.dmp

Filesize
7.7MB

Download
memory/4824-8-0x000000007428E000-0x000000007428F000-memory.dmp

Filesize
4KB

Download
memory/4824-7-0x0000000005380000-0x0000000005398000-memory.dmp

Filesize
96KB

Download
memory/4824-6-0x0000000007940000-0x0000000007A0C000-memory.dmp

Filesize
816KB

Download
memory/4824-34-0x0000000006330000-0x0000000006364000-memory.dmp

Filesize
208KB

Download
memory/4824-16-0x000000000A650000-0x000000000A6B6000-memory.dmp

Filesize
408KB

Download
memory/4824-12-0x000000000A440000-0x000000000A4DC000-memory.dmp

Filesize
624KB

Download