formbook | cde5c3098db9276da56db0945cad4d99d87854cb2ed9c435bdef4dd30e832868

General

Target

invoice.exe
Size

384KB
MD5

e6fcc19f1ef03db2c4d40dcb949ce40f
SHA1

0823317ace170ee272b02368c9a3daa5a292765b
SHA256

3f5c9bf874c9e7dbbd79fcafa447c3ae0f35659827f91555ba09a2fa13a862dd
SHA512

4bdaab26e5deb5da4fa93dc583da96292f05e40dd0da2b26eb1e33d7b5ce68f3db751586839826d43d9c0202ca2dfb8cccb51eda70c72bde7cf9e80779edc460
SSDEEP

6144:yQ78PdlxClB67NxX6JyBVIbMNISinsysqZbMyLYDtVJyg:yFSejXbVhISgdsqZbHLY3

Score

10^/10

formbook rs26 discovery 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/5080-10-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/5080-14-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/5080-20-0x0000000000400000-0x000000000042D000-memory.dmp	formbook

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

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1256 set thread context of 5080	1256	invoice.exe	93
PID 5080 set thread context of 3432	5080	RegSvcs.exe	56
PID 5080 set thread context of 3432	5080	RegSvcs.exe	56
PID 3736 set thread context of 3432	3736	wscript.exe	56

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 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	wscript.exe
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

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
2392	schtasks.exe

Suspicious behavior: EnumeratesProcesses 49 IoCs

pid	Process
1256	invoice.exe
5080	RegSvcs.exe
5080	RegSvcs.exe
5080	RegSvcs.exe
5080	RegSvcs.exe
5080	RegSvcs.exe
5080	RegSvcs.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe
3736	wscript.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
5080	RegSvcs.exe
5080	RegSvcs.exe
5080	RegSvcs.exe
5080	RegSvcs.exe
3736	wscript.exe
3736	wscript.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1256	invoice.exe
Token: SeDebugPrivilege	5080	RegSvcs.exe
Token: SeDebugPrivilege	3736	wscript.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1256 wrote to memory of 2392	1256	invoice.exe	91
PID 1256 wrote to memory of 2392	1256	invoice.exe	91
PID 1256 wrote to memory of 2392	1256	invoice.exe	91
PID 1256 wrote to memory of 5080	1256	invoice.exe	93
PID 1256 wrote to memory of 5080	1256	invoice.exe	93
PID 1256 wrote to memory of 5080	1256	invoice.exe	93
PID 1256 wrote to memory of 5080	1256	invoice.exe	93
PID 1256 wrote to memory of 5080	1256	invoice.exe	93
PID 1256 wrote to memory of 5080	1256	invoice.exe	93
PID 3432 wrote to memory of 3736	3432	Explorer.EXE	94
PID 3432 wrote to memory of 3736	3432	Explorer.EXE	94
PID 3432 wrote to memory of 3736	3432	Explorer.EXE	94
PID 3736 wrote to memory of 4944	3736	wscript.exe	95
PID 3736 wrote to memory of 4944	3736	wscript.exe	95
PID 3736 wrote to memory of 4944	3736	wscript.exe	95

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3432
- 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:1256
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\JQGuJQhYCPqeAJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp40AE.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2392
- - 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:5080
- C:\Windows\SysWOW64\wscript.exe
  "C:\Windows\SysWOW64\wscript.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:3736
- - 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:4944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp40AE.tmp

Filesize
1KB

MD5
ae03aa58e2d3c23749b89f65812f46ea

SHA1
5428d71ddf0420db6d6944a954cd9ce1a203878b

SHA256
d0d9de2656b44731f189955a464d199052f0ce8ce2d17217f6d9494d56c54a00

SHA512
fe006713048fb459c3970b2ebc7e2edc4aef535d1f31266cf05eba17f7c0dc9f02e1b16dba7da58ffe7bf45c2fc674b11308540f4aae655c44c4677c7b3399e5

Download Submit
memory/1256-16-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/1256-1-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/1256-2-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/1256-3-0x00000000746F2000-0x00000000746F3000-memory.dmp

Filesize
4KB

Download
memory/1256-4-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/1256-0-0x00000000746F2000-0x00000000746F3000-memory.dmp

Filesize
4KB

Download
memory/1256-12-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/3432-22-0x0000000008880000-0x0000000008A12000-memory.dmp

Filesize
1.6MB

Download
memory/3432-23-0x0000000002C80000-0x0000000002D40000-memory.dmp

Filesize
768KB

Download
memory/3432-32-0x00000000083F0000-0x000000000855F000-memory.dmp

Filesize
1.4MB

Download
memory/3432-31-0x00000000083F0000-0x000000000855F000-memory.dmp

Filesize
1.4MB

Download
memory/3432-18-0x0000000002C80000-0x0000000002D40000-memory.dmp

Filesize
768KB

Download
memory/3432-29-0x00000000083F0000-0x000000000855F000-memory.dmp

Filesize
1.4MB

Download
memory/3432-26-0x0000000008880000-0x0000000008A12000-memory.dmp

Filesize
1.6MB

Download
memory/3736-24-0x0000000000FC0000-0x0000000000FE7000-memory.dmp

Filesize
156KB

Download
memory/3736-25-0x0000000000FC0000-0x0000000000FE7000-memory.dmp

Filesize
156KB

Download
memory/5080-10-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/5080-14-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/5080-21-0x0000000001030000-0x0000000001044000-memory.dmp

Filesize
80KB

Download
memory/5080-20-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/5080-17-0x0000000001070000-0x00000000013BA000-memory.dmp

Filesize
3.3MB

Download
memory/5080-15-0x0000000000BB0000-0x0000000000BC4000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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