formbook | 7a5a0ac254e92c52dd034502975e23aa340aa8d61e5ad03e6125a9e5ce0500fb

General

Target

40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe
Size

1.1MB
MD5

c83f4de174d804301f193c6b1ebbe1e1
SHA1

e988e9055ee10cc7a8df7a056e0ebf68f473b93b
SHA256

40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5
SHA512

d9e4096819795ab6f329e16de57938d7ed05448aec340abc1e92a68913ae417612c242459703b53f77b481197cadff0e452bf5864f10793f297bde3e2ea70832
SSDEEP

12288:XbvsEh1mMhKz6qYi0MHaXAhvI0R2X0iQcsiVFQDNBS+suogRQeW08f2r2:QEhz8z6lRc2XcczyxM8ogo0

Score

10^/10

formbook bwk discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

bwk

Decoy

alexrabus.com

education618.com

nelivo.com

gosanispire.com

cdaboozecruise.com

lovenfys.com

wellsleyarts.com

madcord.net

aadiventura.com

prideglobalholdings.com

tu-aviso.com

rjroof.com

upthehilldogwalking.com

ultraletefit.com

opinetree.com

retiredalsolovingit.com

oculensweb.com

laurartproductions.com

uncontenido.com

elisabethchin.com

Signatures

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

CustAttr .NET packer 1 IoCs

Detects CustAttr .NET packer in memory.

resource	yara_rule
behavioral2/memory/4676-8-0x0000000005BE0000-0x0000000005BEC000-memory.dmp	CustAttr

Formbook payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/3664-13-0x0000000000400000-0x000000000042E000-memory.dmp	formbook

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4676 set thread context of 3664	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	100

System Location Discovery: System Language Discovery 1 TTPs 1 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	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe
4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe
3664	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe
3664	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4676 wrote to memory of 3628	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	99
PID 4676 wrote to memory of 3628	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	99
PID 4676 wrote to memory of 3628	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	99
PID 4676 wrote to memory of 3664	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	100
PID 4676 wrote to memory of 3664	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	100
PID 4676 wrote to memory of 3664	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	100
PID 4676 wrote to memory of 3664	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	100
PID 4676 wrote to memory of 3664	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	100
PID 4676 wrote to memory of 3664	4676	40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe	100

C:\Users\Admin\AppData\Local\Temp\40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe
"C:\Users\Admin\AppData\Local\Temp\40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4676
- C:\Users\Admin\AppData\Local\Temp\40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe
  "C:\Users\Admin\AppData\Local\Temp\40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe"
  2⤵
  PID:3628
- C:\Users\Admin\AppData\Local\Temp\40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe
  "C:\Users\Admin\AppData\Local\Temp\40619e22c2b83a5d635d00d27fd1f5f1b4f38dcb109db827e0947a72458e19d5.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3664

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/3664-13-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3664-16-0x0000000001910000-0x0000000001C5A000-memory.dmp

Filesize
3.3MB

Download
memory/4676-8-0x0000000005BE0000-0x0000000005BEC000-memory.dmp

Filesize
48KB

Download
memory/4676-9-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

Filesize
4KB

Download
memory/4676-4-0x0000000005950000-0x00000000059E2000-memory.dmp

Filesize
584KB

Download
memory/4676-5-0x0000000005870000-0x000000000587A000-memory.dmp

Filesize
40KB

Download
memory/4676-6-0x0000000005AF0000-0x0000000005B46000-memory.dmp

Filesize
344KB

Download
memory/4676-7-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/4676-0-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

Filesize
4KB

Download
memory/4676-3-0x0000000005E60000-0x0000000006404000-memory.dmp

Filesize
5.6MB

Download
memory/4676-10-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/4676-11-0x0000000001760000-0x0000000001816000-memory.dmp

Filesize
728KB

Download
memory/4676-12-0x0000000005DC0000-0x0000000005E34000-memory.dmp

Filesize
464KB

Download
memory/4676-2-0x00000000057A0000-0x000000000583C000-memory.dmp

Filesize
624KB

Download
memory/4676-15-0x0000000074DF0000-0x00000000755A0000-memory.dmp

Filesize
7.7MB

Download
memory/4676-1-0x0000000000E10000-0x0000000000F2A000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing