formbook | 5b1dae0459ba4acf846a07e0d68475758c8f49bbef43b1b13e243e5110a86e2a

General

Target

fslakj4w.exe
Size

973KB
MD5

f9c0d7cefb55c367f9dda0ba122fea52
SHA1

e809b5d8a8659033ebcb58a332b51ab306ad0537
SHA256

c193f7d1ed39688cfd7a5589e6c128c21515485b4a0de89dc7e2452f8f751d5f
SHA512

abf1fc4b4e862e6a6eff7b3f895dd26938946dd049d99d27c4cdd66cc22cc3d933bd2033e2f0d1ec1730cf49e7108285a67784254278dab7b25ad6924b25283f
SSDEEP

12288:FjC/7ZPvq1igKj7QA5Ke7+VvCTdHKCvJtoVE2hmzk5Cd30iE:FClPuOQA577cvCdvroVpqmm0

Score

10^/10

formbook n7ak discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

n7ak

Decoy

audereventur.com

huro14.com

wwwjinsha155.com

antiquevendor.com

samuraisoulfood.net

traffic4updates.download

hypersarv.com

rapport-happy-wedding.com

rokutechnosupport.online

allworljob.com

hanaleedossmann.com

kauai-marathon.com

bepbosch.com

kangen-international.com

zoneshopemenowz.com

belviderewrestling.com

ipllink.com

sellingforcreators.com

wwwswty6655.com

qtumboa.com

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral1/memory/2876-11-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral1/memory/2876-15-0x0000000000400000-0x000000000042D000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
2112	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2512 set thread context of 2876	2512	fslakj4w.exe	32
PID 2876 set thread context of 1232	2876	fslakj4w.exe	21
PID 2052 set thread context of 1232	2052	netsh.exe	21

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	fslakj4w.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
2512	fslakj4w.exe
2512	fslakj4w.exe
2876	fslakj4w.exe
2876	fslakj4w.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe
2052	netsh.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2876	fslakj4w.exe
2876	fslakj4w.exe
2876	fslakj4w.exe
2052	netsh.exe
2052	netsh.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2512	fslakj4w.exe
Token: SeDebugPrivilege	2876	fslakj4w.exe
Token: SeDebugPrivilege	2052	netsh.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2512 wrote to memory of 1396	2512	fslakj4w.exe	31
PID 2512 wrote to memory of 1396	2512	fslakj4w.exe	31
PID 2512 wrote to memory of 1396	2512	fslakj4w.exe	31
PID 2512 wrote to memory of 1396	2512	fslakj4w.exe	31
PID 2512 wrote to memory of 2876	2512	fslakj4w.exe	32
PID 2512 wrote to memory of 2876	2512	fslakj4w.exe	32
PID 2512 wrote to memory of 2876	2512	fslakj4w.exe	32
PID 2512 wrote to memory of 2876	2512	fslakj4w.exe	32
PID 2512 wrote to memory of 2876	2512	fslakj4w.exe	32
PID 2512 wrote to memory of 2876	2512	fslakj4w.exe	32
PID 2512 wrote to memory of 2876	2512	fslakj4w.exe	32
PID 1232 wrote to memory of 2052	1232	Explorer.EXE	33
PID 1232 wrote to memory of 2052	1232	Explorer.EXE	33
PID 1232 wrote to memory of 2052	1232	Explorer.EXE	33
PID 1232 wrote to memory of 2052	1232	Explorer.EXE	33
PID 2052 wrote to memory of 2112	2052	netsh.exe	34
PID 2052 wrote to memory of 2112	2052	netsh.exe	34
PID 2052 wrote to memory of 2112	2052	netsh.exe	34
PID 2052 wrote to memory of 2112	2052	netsh.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1232
- C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe
  "C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2512
- - C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe
    "C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe"
    3⤵
    PID:1396
- - C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe
    "C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2876
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\SysWOW64\netsh.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2052
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2112

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

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Downloads

memory/1232-17-0x0000000004720000-0x00000000047D1000-memory.dmp

Filesize
708KB

Download
memory/1232-20-0x0000000004720000-0x00000000047D1000-memory.dmp

Filesize
708KB

Download
memory/2052-19-0x0000000001050000-0x000000000106B000-memory.dmp

Filesize
108KB

Download
memory/2052-18-0x0000000001050000-0x000000000106B000-memory.dmp

Filesize
108KB

Download
memory/2512-1-0x0000000001080000-0x000000000117A000-memory.dmp

Filesize
1000KB

Download
memory/2512-2-0x0000000073CC0000-0x00000000743AE000-memory.dmp

Filesize
6.9MB

Download
memory/2512-3-0x00000000004B0000-0x00000000004BA000-memory.dmp

Filesize
40KB

Download
memory/2512-4-0x0000000073CCE000-0x0000000073CCF000-memory.dmp

Filesize
4KB

Download
memory/2512-5-0x0000000073CC0000-0x00000000743AE000-memory.dmp

Filesize
6.9MB

Download
memory/2512-6-0x0000000004730000-0x0000000004792000-memory.dmp

Filesize
392KB

Download
memory/2512-0-0x0000000073CCE000-0x0000000073CCF000-memory.dmp

Filesize
4KB

Download
memory/2512-12-0x0000000073CC0000-0x00000000743AE000-memory.dmp

Filesize
6.9MB

Download
memory/2876-11-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2876-16-0x0000000000180000-0x0000000000194000-memory.dmp

Filesize
80KB

Download
memory/2876-15-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2876-13-0x0000000000910000-0x0000000000C13000-memory.dmp

Filesize
3.0MB

Download
memory/2876-8-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2876-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2876-7-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download

Analysis

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