formbook | a49527480fd1d0c7846c40775f3a1b1f518bb1ed0b62680cd87b0d44328f9a94

General

Target

ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
Size

450KB
MD5

cd005dbadf071616082e110600abc48d
SHA1

c111f671078a2fc46ec46c501e96079cf97e10c7
SHA256

ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f
SHA512

d1960751778de17ee541669a51c0c7ea7a007af39fb5a957cb28f08d02819b08ce417c24e1f8b83e401ab2dd5cbd524b2ba1e1b83cf1d1f75291aff52b8af87c
SSDEEP

12288:ifH22qla5w/yXbx+DbZ83FLDqqC5l/40PVc:ifH0MW/Ibx+DbZ83pqp5l/

Score

10^/10

formbook purecrypter fs44 discovery downloader loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

fs44

Decoy

whneat.com

jljcw.net

pocodelivery.com

outofplacezine.com

yavuzcansigorta.com

xinhewood-cn.com

cartogogh.com

5avis.com

joyceyong.art

digitalsurf.community

blackcreekbarns.com

magazinedistribuidor.com

sportsgross.com

drevom.online

mayibeofservice.com

gareloi-digit.com

permitha.net

renaissanceestetica.com

facts-r-friends.com

dach-loc.com

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral2/memory/3900-8-0x0000000007370000-0x00000000073E0000-memory.dmp	family_purecrypter

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Formbook family
formbook
PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Purecrypter family
purecrypter

Formbook payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/1004-24-0x0000000000400000-0x000000000042F000-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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe

Executes dropped EXE 1 IoCs

pid	Process
4068	Dtyjdrkcyvvjlatasks.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Skipyfd = "\"C:\\Users\\Admin\\AppData\\Roaming\\Rbdwvaogv\\Skipyfd.exe\""	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3900 set thread context of 1004	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	102

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	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Dtyjdrkcyvvjlatasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4756	timeout.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
1004	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
1004	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4068	Dtyjdrkcyvvjlatasks.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3900 wrote to memory of 3828	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	94
PID 3900 wrote to memory of 3828	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	94
PID 3900 wrote to memory of 3828	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	94
PID 3828 wrote to memory of 4756	3828	cmd.exe	96
PID 3828 wrote to memory of 4756	3828	cmd.exe	96
PID 3828 wrote to memory of 4756	3828	cmd.exe	96
PID 3900 wrote to memory of 4068	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	99
PID 3900 wrote to memory of 4068	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	99
PID 3900 wrote to memory of 4068	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	99
PID 3900 wrote to memory of 4832	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	100
PID 3900 wrote to memory of 4832	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	100
PID 3900 wrote to memory of 4832	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	100
PID 3900 wrote to memory of 4924	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	101
PID 3900 wrote to memory of 4924	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	101
PID 3900 wrote to memory of 4924	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	101
PID 3900 wrote to memory of 1004	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	102
PID 3900 wrote to memory of 1004	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	102
PID 3900 wrote to memory of 1004	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	102
PID 3900 wrote to memory of 1004	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	102
PID 3900 wrote to memory of 1004	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	102
PID 3900 wrote to memory of 1004	3900	ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe	102

C:\Users\Admin\AppData\Local\Temp\ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
"C:\Users\Admin\AppData\Local\Temp\ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3900
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 10
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3828
- - C:\Windows\SysWOW64\timeout.exe
    timeout 10
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4756
- C:\Users\Admin\AppData\Local\Temp\Dtyjdrkcyvvjlatasks.exe
  "C:\Users\Admin\AppData\Local\Temp\Dtyjdrkcyvvjlatasks.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4068
- C:\Users\Admin\AppData\Local\Temp\ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
  C:\Users\Admin\AppData\Local\Temp\ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
  2⤵
  PID:4832
- C:\Users\Admin\AppData\Local\Temp\ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
  C:\Users\Admin\AppData\Local\Temp\ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
  2⤵
  PID:4924
- C:\Users\Admin\AppData\Local\Temp\ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
  C:\Users\Admin\AppData\Local\Temp\ce85ee918e48a7c9a731c87109b9dbda0db744fe753412dad9397f670beebb8f.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1004

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

1

T1112

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\Dtyjdrkcyvvjlatasks.exe

Filesize
72KB

MD5
e2c915e5f775cd76f53cab4eede03ba6

SHA1
2ec952debae802353c29098ca010244d8ff974b5

SHA256
19b271898408a5180f1d0d79fc9b316375edb63f509ae8eda49b73cdf8f83f74

SHA512
cfee769e8e029a1891a6d45ab92a681604dd6e0818794f03765122d4070c8b6edfa4ce5358fd7258629a6843f4d3b2a236fb04d8fea9f45769245ebbcf38d785

Download Submit
memory/1004-28-0x00000000016C0000-0x0000000001A0A000-memory.dmp

Filesize
3.3MB

Download
memory/1004-27-0x00000000016C0000-0x0000000001A0A000-memory.dmp

Filesize
3.3MB

Download
memory/1004-24-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3900-6-0x000000007478E000-0x000000007478F000-memory.dmp

Filesize
4KB

Download
memory/3900-4-0x0000000074780000-0x0000000074F30000-memory.dmp

Filesize
7.7MB

Download
memory/3900-0-0x000000007478E000-0x000000007478F000-memory.dmp

Filesize
4KB

Download
memory/3900-7-0x0000000074780000-0x0000000074F30000-memory.dmp

Filesize
7.7MB

Download
memory/3900-8-0x0000000007370000-0x00000000073E0000-memory.dmp

Filesize
448KB

Download
memory/3900-9-0x00000000073E0000-0x000000000742C000-memory.dmp

Filesize
304KB

Download
memory/3900-5-0x0000000004E30000-0x0000000004E3A000-memory.dmp

Filesize
40KB

Download
memory/3900-3-0x0000000004E60000-0x0000000004EF2000-memory.dmp

Filesize
584KB

Download
memory/3900-26-0x0000000074780000-0x0000000074F30000-memory.dmp

Filesize
7.7MB

Download
memory/3900-2-0x0000000005370000-0x0000000005914000-memory.dmp

Filesize
5.6MB

Download
memory/3900-1-0x00000000003C0000-0x0000000000436000-memory.dmp

Filesize
472KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads