formbook | 5e4bd900a7d96e565302699d2b0ba3649e1964fca0e82cad6b11379a3972a110

General

Target

invoice.exe
Size

430KB
MD5

330f321f4ad980d88e42856eadef1b4d
SHA1

c9d3d4d2826e772bc9ea06c000ecf308f5a391bc
SHA256

4919a29a5a4c667f78fbb48036f83de599df655391011fb243c1ce5c64c64a8b
SHA512

f47c477ff13c9261382d0399ebb66b85e528c93c82daaa588813bcf60459d19633113209b177b5c150629a6e6d27f4ee0eaab2028e8a762571963ff91f193e9c
SSDEEP

6144:tWZAyYUcUZTABiq7lfjxsZhEhcSbj3j7ZOrVCQW80QfedQXgCUtgT:OYUcblfjxcuhc0TYs8pcQQ

Score

10^/10

formbook rs26 discovery persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

rs26

Decoy

amazon-review.info

17kaihuiba.com

timeableholdings.com

techvestorsmultifamily.com

rokketsoftware.com

abbigliamentoagricolo.com

artjiayi.com

smooouse.com

lightcastwired.com

bravuad.com

mr133.com

clubfitdartmouth.com

masturbation-stories.net

yedekparcatreni.com

pureologyrising.com

goodsystem2updating.download

fn4pk8p0o5.com

climatechangersofny.com

shuangxian023.com

lxiuot.men

Signatures

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

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/372-9-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/372-14-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/372-18-0x0000000000400000-0x000000000042D000-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	help.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\XXG4TXTPZLC = "C:\\Program Files (x86)\\Sfv-ptxk\\inj8mv_h9redef.exe"	help.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	invoice.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 4 IoCs

description	pid	Process	procid_target
PID 2452 set thread context of 372	2452	invoice.exe	93
PID 372 set thread context of 3384	372	RegSvcs.exe	55
PID 372 set thread context of 3384	372	RegSvcs.exe	55
PID 4456 set thread context of 3384	4456	help.exe	55

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Sfv-ptxk\inj8mv_h9redef.exe	help.exe

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 5 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	invoice.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	help.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-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	help.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
3712	schtasks.exe

Suspicious behavior: EnumeratesProcesses 45 IoCs

pid	Process
2452	invoice.exe
372	RegSvcs.exe
372	RegSvcs.exe
372	RegSvcs.exe
372	RegSvcs.exe
372	RegSvcs.exe
372	RegSvcs.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe

Suspicious behavior: MapViewOfSection 8 IoCs

pid	Process
372	RegSvcs.exe
372	RegSvcs.exe
372	RegSvcs.exe
372	RegSvcs.exe
4456	help.exe
4456	help.exe
4456	help.exe
4456	help.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2452	invoice.exe
Token: SeDebugPrivilege	372	RegSvcs.exe
Token: SeDebugPrivilege	4456	help.exe
Token: SeShutdownPrivilege	3384	Explorer.EXE
Token: SeCreatePagefilePrivilege	3384	Explorer.EXE
Token: SeShutdownPrivilege	3384	Explorer.EXE
Token: SeCreatePagefilePrivilege	3384	Explorer.EXE

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2452 wrote to memory of 3712	2452	invoice.exe	91
PID 2452 wrote to memory of 3712	2452	invoice.exe	91
PID 2452 wrote to memory of 3712	2452	invoice.exe	91
PID 2452 wrote to memory of 372	2452	invoice.exe	93
PID 2452 wrote to memory of 372	2452	invoice.exe	93
PID 2452 wrote to memory of 372	2452	invoice.exe	93
PID 2452 wrote to memory of 372	2452	invoice.exe	93
PID 2452 wrote to memory of 372	2452	invoice.exe	93
PID 2452 wrote to memory of 372	2452	invoice.exe	93
PID 3384 wrote to memory of 4456	3384	Explorer.EXE	94
PID 3384 wrote to memory of 4456	3384	Explorer.EXE	94
PID 3384 wrote to memory of 4456	3384	Explorer.EXE	94
PID 4456 wrote to memory of 1532	4456	help.exe	95
PID 4456 wrote to memory of 1532	4456	help.exe	95
PID 4456 wrote to memory of 1532	4456	help.exe	95
PID 4456 wrote to memory of 2040	4456	help.exe	97
PID 4456 wrote to memory of 2040	4456	help.exe	97
PID 4456 wrote to memory of 2040	4456	help.exe	97
PID 4456 wrote to memory of 3412	4456	help.exe	99
PID 4456 wrote to memory of 3412	4456	help.exe	99
PID 4456 wrote to memory of 3412	4456	help.exe	99

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3384
- C:\Users\Admin\AppData\Local\Temp\invoice.exe
  "C:\Users\Admin\AppData\Local\Temp\invoice.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2452
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TpCLhIfebJnU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp13C2.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3712
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
    "{path}"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:372
- C:\Windows\SysWOW64\help.exe
  "C:\Windows\SysWOW64\help.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
  PID:4456
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1532
- - 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:2040
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:3412

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

2

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

Query Registry

1

T1012

System Information Discovery

2

T1082

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

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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\Local\Temp\tmp13C2.tmp

Filesize
1KB

MD5
36bad028ff2b095cc60f21c05b3dfd56

SHA1
3fc56c85bc9336d9444b43f01422071a9093e50a

SHA256
21fa237e54297880f8448df6dab0fdf66e5f4db7a45993a65a1ba557e2133371

SHA512
43a997d0c45a98ba30b0323399a18120ff09cc3f11cd9b92fc2616f995781cecb359497f8daefee3c455ec18e4605a5a27fe4c9d4f1d1f72c7d8f285c7a906e8

Download Submit
C:\Users\Admin\AppData\Roaming\4PNN4O-F\4PNlogim.jpeg

Filesize
85KB

MD5
894bedaebd8b2ee3f40578ea84a0c908

SHA1
0db65672e77cc078bd17036ae83b813719501139

SHA256
e902a5be9ee71208a830a8c04f6b9448e29972ff9d6368217f0fcc1684c51a6f

SHA512
6bec7de8ba6671f25430a3a5deba87bbc08d9b70c981724bdd0b31fe7aeabc267199a4f1cc9803cffdc59171b06c8ed2e634144dbd878945ba9792b13d5fec40

Download Submit
C:\Users\Admin\AppData\Roaming\4PNN4O-F\4PNlogrf.ini

Filesize
40B

MD5
2f245469795b865bdd1b956c23d7893d

SHA1
6ad80b974d3808f5a20ea1e766c7d2f88b9e5895

SHA256
1662d01a2d47b875a34fc7a8cd92e78cb2ba7f34023c7fd2639cbb10b8d94361

SHA512
909f189846a5d2db208a5eb2e7cb3042c0f164caf437e2b1b6de608c0a70e4f3510b81b85753dbeec1e211e6a83e6ea8c96aff896e9b6e8ed42014473a54dc4f

Download Submit
C:\Users\Admin\AppData\Roaming\4PNN4O-F\4PNlogrg.ini

Filesize
38B

MD5
4aadf49fed30e4c9b3fe4a3dd6445ebe

SHA1
1e332822167c6f351b99615eada2c30a538ff037

SHA256
75034beb7bded9aeab5748f4592b9e1419256caec474065d43e531ec5cc21c56

SHA512
eb5b3908d5e7b43ba02165e092f05578f45f15a148b4c3769036aa542c23a0f7cd2bc2770cf4119a7e437de3f681d9e398511f69f66824c516d9b451bb95f945

Download Submit
C:\Users\Admin\AppData\Roaming\4PNN4O-F\4PNlogri.ini

Filesize
40B

MD5
d63a82e5d81e02e399090af26db0b9cb

SHA1
91d0014c8f54743bba141fd60c9d963f869d76c9

SHA256
eaece2eba6310253249603033c744dd5914089b0bb26bde6685ec9813611baae

SHA512
38afb05016d8f3c69d246321573997aaac8a51c34e61749a02bf5e8b2b56b94d9544d65801511044e1495906a86dc2100f2e20ff4fcbed09e01904cc780fdbad

Download Submit
C:\Users\Admin\AppData\Roaming\4PNN4O-F\4PNlogrv.ini

Filesize
872B

MD5
bbc41c78bae6c71e63cb544a6a284d94

SHA1
33f2c1d9fa0e9c99b80bc2500621e95af38b1f9a

SHA256
ee83c6bcea9353c74bfc0a7e739f3c4a765ace894470e09cdcdebba700b8d4cb

SHA512
0aea424b57adae3e14ad6491cab585f554b4dffe601b5a17bad6ee6177d2f0f995e419cde576e2d1782b9bddc0661aada11a2c9f1454ae625d9e3223635ec9f4

Download Submit
memory/372-19-0x0000000000EE0000-0x0000000000EF4000-memory.dmp

Filesize
80KB

Download
memory/372-9-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/372-12-0x0000000000F40000-0x000000000128A000-memory.dmp

Filesize
3.3MB

Download
memory/372-15-0x0000000000E90000-0x0000000000EA4000-memory.dmp

Filesize
80KB

Download
memory/372-14-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/372-18-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2452-1-0x0000000075210000-0x00000000757C1000-memory.dmp

Filesize
5.7MB

Download
memory/2452-11-0x0000000075210000-0x00000000757C1000-memory.dmp

Filesize
5.7MB

Download
memory/2452-0-0x0000000075212000-0x0000000075213000-memory.dmp

Filesize
4KB

Download
memory/2452-2-0x0000000075210000-0x00000000757C1000-memory.dmp

Filesize
5.7MB

Download
memory/2452-3-0x0000000075212000-0x0000000075213000-memory.dmp

Filesize
4KB

Download
memory/2452-4-0x0000000075210000-0x00000000757C1000-memory.dmp

Filesize
5.7MB

Download
memory/2452-5-0x0000000075210000-0x00000000757C1000-memory.dmp

Filesize
5.7MB

Download
memory/3384-20-0x0000000008800000-0x0000000008958000-memory.dmp

Filesize
1.3MB

Download
memory/3384-29-0x0000000008D80000-0x0000000008ED3000-memory.dmp

Filesize
1.3MB

Download
memory/3384-30-0x0000000008D80000-0x0000000008ED3000-memory.dmp

Filesize
1.3MB

Download
memory/3384-27-0x0000000008D80000-0x0000000008ED3000-memory.dmp

Filesize
1.3MB

Download
memory/3384-24-0x0000000008800000-0x0000000008958000-memory.dmp

Filesize
1.3MB

Download
memory/3384-21-0x0000000002F60000-0x0000000003040000-memory.dmp

Filesize
896KB

Download
memory/3384-16-0x0000000002F60000-0x0000000003040000-memory.dmp

Filesize
896KB

Download
memory/4456-22-0x0000000000CC0000-0x0000000000CC7000-memory.dmp

Filesize
28KB

Download
memory/4456-23-0x0000000000CC0000-0x0000000000CC7000-memory.dmp

Filesize
28KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads