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 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
behavioral1/memory/2980-13-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral1/memory/2980-16-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral1/memory/2980-21-0x0000000000400000-0x000000000042D000-memory.dmp	formbook

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2100 set thread context of 2980	2100	invoice.exe	33
PID 2980 set thread context of 1192	2980	RegSvcs.exe	21
PID 2980 set thread context of 1192	2980	RegSvcs.exe	21
PID 2608 set thread context of 1192	2608	svchost.exe	21

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	svchost.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
2808	schtasks.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
2980	RegSvcs.exe
2980	RegSvcs.exe
2100	invoice.exe
2980	RegSvcs.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe
2608	svchost.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2980	RegSvcs.exe
2980	RegSvcs.exe
2980	RegSvcs.exe
2980	RegSvcs.exe
2608	svchost.exe
2608	svchost.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2980	RegSvcs.exe
Token: SeDebugPrivilege	2100	invoice.exe
Token: SeDebugPrivilege	2608	svchost.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2808	2100	invoice.exe	31
PID 2100 wrote to memory of 2808	2100	invoice.exe	31
PID 2100 wrote to memory of 2808	2100	invoice.exe	31
PID 2100 wrote to memory of 2808	2100	invoice.exe	31
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 2100 wrote to memory of 2980	2100	invoice.exe	33
PID 1192 wrote to memory of 2608	1192	Explorer.EXE	34
PID 1192 wrote to memory of 2608	1192	Explorer.EXE	34
PID 1192 wrote to memory of 2608	1192	Explorer.EXE	34
PID 1192 wrote to memory of 2608	1192	Explorer.EXE	34
PID 2608 wrote to memory of 2656	2608	svchost.exe	35
PID 2608 wrote to memory of 2656	2608	svchost.exe	35
PID 2608 wrote to memory of 2656	2608	svchost.exe	35
PID 2608 wrote to memory of 2656	2608	svchost.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1192
- C:\Users\Admin\AppData\Local\Temp\invoice.exe
  "C:\Users\Admin\AppData\Local\Temp\invoice.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2100
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TpCLhIfebJnU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2211.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2808
- - 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:2980
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\SysWOW64\svchost.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:2608
- - 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:2656

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

System Information Discovery

1

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\tmp2211.tmp

Filesize
1KB

MD5
7bdf61ff6cb84b6e35e600bd51288395

SHA1
429a262df59aa57a6d3b5af80bfc7db542179ff7

SHA256
4f0d4696251093f58afa2d7d76bdda042c42eec4b25404feaf607cd0db9d61c7

SHA512
0b6ce9620f3825a85daab3bd47083674ec053584a2143469128f9a416403d48a986dfb298dbbb4a86d70186cc2eabf36047e143dfce8d26ebba700846aa78ee9

Download Submit
memory/1192-24-0x0000000005170000-0x0000000005262000-memory.dmp

Filesize
968KB

Download
memory/1192-27-0x0000000005170000-0x0000000005262000-memory.dmp

Filesize
968KB

Download
memory/1192-18-0x0000000004FD0000-0x0000000005168000-memory.dmp

Filesize
1.6MB

Download
memory/1192-23-0x0000000004FD0000-0x0000000005168000-memory.dmp

Filesize
1.6MB

Download
memory/2100-4-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/2100-1-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/2100-0-0x0000000074C61000-0x0000000074C62000-memory.dmp

Filesize
4KB

Download
memory/2100-19-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/2100-3-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/2100-2-0x0000000074C60000-0x000000007520B000-memory.dmp

Filesize
5.7MB

Download
memory/2608-25-0x0000000000EA0000-0x0000000000EA8000-memory.dmp

Filesize
32KB

Download
memory/2608-26-0x0000000000EA0000-0x0000000000EA8000-memory.dmp

Filesize
32KB

Download
memory/2980-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2980-17-0x0000000000290000-0x00000000002A4000-memory.dmp

Filesize
80KB

Download
memory/2980-8-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2980-13-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2980-22-0x00000000002E0000-0x00000000002F4000-memory.dmp

Filesize
80KB

Download
memory/2980-21-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2980-9-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/2980-14-0x00000000009B0000-0x0000000000CB3000-memory.dmp

Filesize
3.0MB

Download
memory/2980-16-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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