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 persistence 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
behavioral2/memory/5068-12-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/5068-17-0x0000000000400000-0x000000000042D000-memory.dmp	formbook

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\PPCHEZ9H10H = "C:\\Program Files (x86)\\Xxt_pufwx\\users6q.exe"	rundll32.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2060 set thread context of 5068	2060	fslakj4w.exe	92
PID 5068 set thread context of 3508	5068	fslakj4w.exe	56
PID 2316 set thread context of 3508	2316	rundll32.exe	56

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Xxt_pufwx\users6q.exe	rundll32.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fslakj4w.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	rundll32.exe

Suspicious behavior: EnumeratesProcesses 37 IoCs

pid	Process
2060	fslakj4w.exe
2060	fslakj4w.exe
2060	fslakj4w.exe
5068	fslakj4w.exe
5068	fslakj4w.exe
5068	fslakj4w.exe
5068	fslakj4w.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
5068	fslakj4w.exe
5068	fslakj4w.exe
5068	fslakj4w.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe
2316	rundll32.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2060	fslakj4w.exe
Token: SeDebugPrivilege	5068	fslakj4w.exe
Token: SeDebugPrivilege	2316	rundll32.exe
Token: SeShutdownPrivilege	3508	Explorer.EXE
Token: SeCreatePagefilePrivilege	3508	Explorer.EXE
Token: SeShutdownPrivilege	3508	Explorer.EXE
Token: SeCreatePagefilePrivilege	3508	Explorer.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2060 wrote to memory of 4740	2060	fslakj4w.exe	91
PID 2060 wrote to memory of 4740	2060	fslakj4w.exe	91
PID 2060 wrote to memory of 4740	2060	fslakj4w.exe	91
PID 2060 wrote to memory of 5068	2060	fslakj4w.exe	92
PID 2060 wrote to memory of 5068	2060	fslakj4w.exe	92
PID 2060 wrote to memory of 5068	2060	fslakj4w.exe	92
PID 2060 wrote to memory of 5068	2060	fslakj4w.exe	92
PID 2060 wrote to memory of 5068	2060	fslakj4w.exe	92
PID 2060 wrote to memory of 5068	2060	fslakj4w.exe	92
PID 3508 wrote to memory of 2316	3508	Explorer.EXE	93
PID 3508 wrote to memory of 2316	3508	Explorer.EXE	93
PID 3508 wrote to memory of 2316	3508	Explorer.EXE	93
PID 2316 wrote to memory of 5012	2316	rundll32.exe	94
PID 2316 wrote to memory of 5012	2316	rundll32.exe	94
PID 2316 wrote to memory of 5012	2316	rundll32.exe	94
PID 2316 wrote to memory of 4564	2316	rundll32.exe	96
PID 2316 wrote to memory of 4564	2316	rundll32.exe	96
PID 2316 wrote to memory of 4564	2316	rundll32.exe	96
PID 2316 wrote to memory of 3696	2316	rundll32.exe	98
PID 2316 wrote to memory of 3696	2316	rundll32.exe	98
PID 2316 wrote to memory of 3696	2316	rundll32.exe	98

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	rundll32.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3508
- 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:2060
- - C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe
    "C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe"
    3⤵
    PID:4740
- - 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:5068
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\SysWOW64\rundll32.exe"
  2⤵
  - Adds policy Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - System policy modification
  PID:2316
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\fslakj4w.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:5012
- - C:\Windows\SysWOW64\cmd.exe
    /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4564
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:3696

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

3

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\DB1

Filesize
40KB

MD5
a182561a527f929489bf4b8f74f65cd7

SHA1
8cd6866594759711ea1836e86a5b7ca64ee8911f

SHA256
42aad7886965428a941508b776a666a4450eb658cb90e80fae1e7457fc71f914

SHA512
9bc3bf5a82f6f057e873adebd5b7a4c64adef966537ab9c565fe7c4bb3582e2e485ff993d5ab8a6002363231958fabd0933b48811371b8c155eaa74592b66558

Download Submit
C:\Users\Admin\AppData\Roaming\94O2R65S\94Ologim.jpeg

Filesize
74KB

MD5
3c7ac2868b62430b73b31cf2aa96a2d6

SHA1
d0016db91d0db4f94a401c79d4373f6949d86409

SHA256
330f2243b8f8b408a02c42c9d8985d75b9a42dc8b4086d1f43d898b36b464e03

SHA512
08b8e5b79278bcecfd1ce1c9a5289459456d179bc8a5058fb97775e350828daedfc8063883138f827fb27e6a8516329f91268e8113db1f64987c24bd2afb78ef

Download Submit
C:\Users\Admin\AppData\Roaming\94O2R65S\94Ologrf.ini

Filesize
40B

MD5
2f245469795b865bdd1b956c23d7893d

SHA1
6ad80b974d3808f5a20ea1e766c7d2f88b9e5895

SHA256
1662d01a2d47b875a34fc7a8cd92e78cb2ba7f34023c7fd2639cbb10b8d94361

SHA512
909f189846a5d2db208a5eb2e7cb3042c0f164caf437e2b1b6de608c0a70e4f3510b81b85753dbeec1e211e6a83e6ea8c96aff896e9b6e8ed42014473a54dc4f

Download Submit
C:\Users\Admin\AppData\Roaming\94O2R65S\94Ologrg.ini

Filesize
38B

MD5
4aadf49fed30e4c9b3fe4a3dd6445ebe

SHA1
1e332822167c6f351b99615eada2c30a538ff037

SHA256
75034beb7bded9aeab5748f4592b9e1419256caec474065d43e531ec5cc21c56

SHA512
eb5b3908d5e7b43ba02165e092f05578f45f15a148b4c3769036aa542c23a0f7cd2bc2770cf4119a7e437de3f681d9e398511f69f66824c516d9b451bb95f945

Download Submit
C:\Users\Admin\AppData\Roaming\94O2R65S\94Ologri.ini

Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\94O2R65S\94Ologrv.ini

Filesize
872B

MD5
bbc41c78bae6c71e63cb544a6a284d94

SHA1
33f2c1d9fa0e9c99b80bc2500621e95af38b1f9a

SHA256
ee83c6bcea9353c74bfc0a7e739f3c4a765ace894470e09cdcdebba700b8d4cb

SHA512
0aea424b57adae3e14ad6491cab585f554b4dffe601b5a17bad6ee6177d2f0f995e419cde576e2d1782b9bddc0661aada11a2c9f1454ae625d9e3223635ec9f4

Download Submit
memory/2060-5-0x0000000004BD0000-0x0000000004BDA000-memory.dmp

Filesize
40KB

Download
memory/2060-14-0x0000000074940000-0x00000000750F0000-memory.dmp

Filesize
7.7MB

Download
memory/2060-8-0x0000000004DD0000-0x0000000004DDA000-memory.dmp

Filesize
40KB

Download
memory/2060-9-0x000000007494E000-0x000000007494F000-memory.dmp

Filesize
4KB

Download
memory/2060-10-0x0000000074940000-0x00000000750F0000-memory.dmp

Filesize
7.7MB

Download
memory/2060-11-0x0000000000A50000-0x0000000000AB2000-memory.dmp

Filesize
392KB

Download
memory/2060-6-0x0000000004E00000-0x0000000004E56000-memory.dmp

Filesize
344KB

Download
memory/2060-7-0x0000000074940000-0x00000000750F0000-memory.dmp

Filesize
7.7MB

Download
memory/2060-0-0x000000007494E000-0x000000007494F000-memory.dmp

Filesize
4KB

Download
memory/2060-4-0x0000000004CA0000-0x0000000004D32000-memory.dmp

Filesize
584KB

Download
memory/2060-3-0x0000000005250000-0x00000000057F4000-memory.dmp

Filesize
5.6MB

Download
memory/2060-2-0x0000000004C00000-0x0000000004C9C000-memory.dmp

Filesize
624KB

Download
memory/2060-1-0x00000000000E0000-0x00000000001DA000-memory.dmp

Filesize
1000KB

Download
memory/2316-22-0x0000000000310000-0x0000000000324000-memory.dmp

Filesize
80KB

Download
memory/2316-20-0x0000000000310000-0x0000000000324000-memory.dmp

Filesize
80KB

Download
memory/3508-27-0x0000000002790000-0x000000000283C000-memory.dmp

Filesize
688KB

Download
memory/3508-28-0x0000000002790000-0x000000000283C000-memory.dmp

Filesize
688KB

Download
memory/3508-30-0x0000000002790000-0x000000000283C000-memory.dmp

Filesize
688KB

Download
memory/3508-23-0x0000000008600000-0x000000000876C000-memory.dmp

Filesize
1.4MB

Download
memory/3508-19-0x0000000008600000-0x000000000876C000-memory.dmp

Filesize
1.4MB

Download
memory/5068-18-0x0000000001080000-0x0000000001094000-memory.dmp

Filesize
80KB

Download
memory/5068-17-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/5068-15-0x00000000011E0000-0x000000000152A000-memory.dmp

Filesize
3.3MB

Download
memory/5068-12-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads