formbook | 7e40a14cd98a9dbd7aefe160c621c4cbe8f1cb148df2a07ee189ee7916f2674f

General

Target

vbc.exe
Size

890KB
MD5

99791e50631075614bdcd484e1f5db07
SHA1

6aa0208d0c3afa21d8e69d1f873d6013f6ca594c
SHA256

4a620c143b7f0f825ad491d7b4f58e903064da24346b000aee31fe9cf5158b4e
SHA512

7e5528bef2ea0aba4d06a17b4264d0b321f3ed24b4acb71008354f4fcb6ff7fb1a6231bb0ba41f0976075fc2ccd89d0860165c08fccda2195578e596430fcb89
SSDEEP

24576:lqE7B0rLZzHborObAtnlirX3wSwBceo1vr:VB0rtDErObAtnlEXASwBce6vr

Score

10^/10

formbook s0r7 discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

s0r7

Decoy

militarybuyowners.com

wpaoucdxs.com

ytjl120.com

gs5920.com

sundayscompany.online

australianfragrances.com

ebikebatarya.com

xljntm.icu

astatz.site

fermanaghhoney.com

365lichtpuntjes.online

trimlifeketo2022trend.life

xn--yetw86b5yv.love

cnwtie.com

jannatnetwork.net

e-girlsnft.com

lianajewelry.com

lapegaia.com

hormonalharmonymethod.com

thread2print.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/2768-20-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2768-23-0x0000000000400000-0x000000000042F000-memory.dmp	formbook

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2864	powershell.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2096 set thread context of 2768	2096	vbc.exe	35
PID 2768 set thread context of 1196	2768	RegSvcs.exe	21
PID 2768 set thread context of 1196	2768	RegSvcs.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 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	vbc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.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
3008	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2096	vbc.exe
2096	vbc.exe
2768	RegSvcs.exe
2768	RegSvcs.exe
2864	powershell.exe
2768	RegSvcs.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2768	RegSvcs.exe
2768	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2096	vbc.exe
Token: SeDebugPrivilege	2768	RegSvcs.exe
Token: SeDebugPrivilege	2864	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 2864	2096	vbc.exe	31
PID 2096 wrote to memory of 2864	2096	vbc.exe	31
PID 2096 wrote to memory of 2864	2096	vbc.exe	31
PID 2096 wrote to memory of 2864	2096	vbc.exe	31
PID 2096 wrote to memory of 3008	2096	vbc.exe	33
PID 2096 wrote to memory of 3008	2096	vbc.exe	33
PID 2096 wrote to memory of 3008	2096	vbc.exe	33
PID 2096 wrote to memory of 3008	2096	vbc.exe	33
PID 2096 wrote to memory of 2768	2096	vbc.exe	35
PID 2096 wrote to memory of 2768	2096	vbc.exe	35
PID 2096 wrote to memory of 2768	2096	vbc.exe	35
PID 2096 wrote to memory of 2768	2096	vbc.exe	35
PID 2096 wrote to memory of 2768	2096	vbc.exe	35
PID 2096 wrote to memory of 2768	2096	vbc.exe	35
PID 2096 wrote to memory of 2768	2096	vbc.exe	35
PID 2096 wrote to memory of 2768	2096	vbc.exe	35
PID 2096 wrote to memory of 2768	2096	vbc.exe	35
PID 2096 wrote to memory of 2768	2096	vbc.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1196
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2096
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\qqdhcs.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2864
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\qqdhcs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp388E.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3008
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

PowerShell

1

T1059.001

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\tmp388E.tmp

Filesize
1KB

MD5
f11b5549820d7822ff565ac9fedac349

SHA1
3ce3fb54a1cf77916ddab0d447e6fec94dcbca67

SHA256
d099d3ca537062b0875af17a4cd2ee9a28d9cc4989ef6dc03b7679fbf0695f48

SHA512
d203949d4857b7e134ae47a681abc9ec965196ae9fa2da168c928bf3c3629a0e8e225ed50734bc09f85bf8149787cec2466d925ce0260a98f5728990c9e7a2f6

Download Submit
memory/2096-6-0x0000000005570000-0x0000000005624000-memory.dmp

Filesize
720KB

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memory/2096-14-0x0000000004620000-0x0000000004654000-memory.dmp

Filesize
208KB

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memory/2096-3-0x0000000074230000-0x000000007491E000-memory.dmp

Filesize
6.9MB

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memory/2096-4-0x000000007423E000-0x000000007423F000-memory.dmp

Filesize
4KB

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memory/2096-5-0x0000000074230000-0x000000007491E000-memory.dmp

Filesize
6.9MB

Download
memory/2096-0-0x000000007423E000-0x000000007423F000-memory.dmp

Filesize
4KB

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memory/2096-1-0x00000000009E0000-0x0000000000AC4000-memory.dmp

Filesize
912KB

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memory/2096-2-0x0000000000260000-0x0000000000270000-memory.dmp

Filesize
64KB

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memory/2096-21-0x0000000074230000-0x000000007491E000-memory.dmp

Filesize
6.9MB

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memory/2768-20-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

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memory/2768-19-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2768-17-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2768-15-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

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memory/2768-23-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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