formbook | da742afc42369db1320628ca59e4f30184b456dee53c32b1b18b6b76104a4405

General

Target

invoice Ceylan 49.600€.exe
Size

352KB
MD5

74f87a533471eaa7719df1d9b0593c2a
SHA1

77a20802e1e2db283ddf605a818372a72b0d8e26
SHA256

851b20d33b8210f3d20ab4694011a0858eeb745e248a768c1e4c214efb59464b
SHA512

a65587fa689531ff0d9da0c24ed9fb01adc986353491b6cb65773c66c7d5bf3773f8ae7c87ca4e2485da442c815722cdf5633e425693a8ace5f888744c868438
SSDEEP

6144:uHKk9IMkhBBLK5F//cVXX2fbi5PQAWH8m11H1OiBSb5iUmkyvYbMNXTUEAp4Ds:uqsSBe3aW+oAb4bHqkTk4YQdUEA

Score

10^/10

formbook cl8k discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

cl8k

Decoy

georgiaprfirm.com

rhinosafeinc.com

gandgpublishing.com

angelyangelarquitectos.com

formation-gallery.com

orangecountyipadrepair.com

aplearn.info

freshlucky.com

wrapfestival.com

zerosarentals.com

ff7a9vlt7.xyz

teachbing.com

mukos.xyz

baojianma.com

dermalaf.com

hannahandpatrick2022.com

yesilnoktam.xyz

theroyalhotels-kw.com

reisebazaar.online

senergypallet.com

Signatures

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

Formbook payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/2128-16-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/2128-21-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/1688-26-0x0000000000D20000-0x0000000000D4F000-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	invoice Ceylan 49.600€.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2588 set thread context of 2128	2588	invoice Ceylan 49.600€.exe	102
PID 2128 set thread context of 3484	2128	invoice Ceylan 49.600€.exe	56
PID 1688 set thread context of 3484	1688	chkdsk.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	invoice Ceylan 49.600€.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chkdsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.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
4856	schtasks.exe

Suspicious behavior: EnumeratesProcesses 50 IoCs

pid	Process
2588	invoice Ceylan 49.600€.exe
2588	invoice Ceylan 49.600€.exe
2128	invoice Ceylan 49.600€.exe
2128	invoice Ceylan 49.600€.exe
2128	invoice Ceylan 49.600€.exe
2128	invoice Ceylan 49.600€.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe
1688	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2128	invoice Ceylan 49.600€.exe
2128	invoice Ceylan 49.600€.exe
2128	invoice Ceylan 49.600€.exe
1688	chkdsk.exe
1688	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2588	invoice Ceylan 49.600€.exe
Token: SeDebugPrivilege	2128	invoice Ceylan 49.600€.exe
Token: SeShutdownPrivilege	3484	Explorer.EXE
Token: SeCreatePagefilePrivilege	3484	Explorer.EXE
Token: SeDebugPrivilege	1688	chkdsk.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2588 wrote to memory of 4856	2588	invoice Ceylan 49.600€.exe	99
PID 2588 wrote to memory of 4856	2588	invoice Ceylan 49.600€.exe	99
PID 2588 wrote to memory of 4856	2588	invoice Ceylan 49.600€.exe	99
PID 2588 wrote to memory of 388	2588	invoice Ceylan 49.600€.exe	101
PID 2588 wrote to memory of 388	2588	invoice Ceylan 49.600€.exe	101
PID 2588 wrote to memory of 388	2588	invoice Ceylan 49.600€.exe	101
PID 2588 wrote to memory of 2128	2588	invoice Ceylan 49.600€.exe	102
PID 2588 wrote to memory of 2128	2588	invoice Ceylan 49.600€.exe	102
PID 2588 wrote to memory of 2128	2588	invoice Ceylan 49.600€.exe	102
PID 2588 wrote to memory of 2128	2588	invoice Ceylan 49.600€.exe	102
PID 2588 wrote to memory of 2128	2588	invoice Ceylan 49.600€.exe	102
PID 2588 wrote to memory of 2128	2588	invoice Ceylan 49.600€.exe	102
PID 3484 wrote to memory of 1688	3484	Explorer.EXE	103
PID 3484 wrote to memory of 1688	3484	Explorer.EXE	103
PID 3484 wrote to memory of 1688	3484	Explorer.EXE	103
PID 1688 wrote to memory of 3232	1688	chkdsk.exe	104
PID 1688 wrote to memory of 3232	1688	chkdsk.exe	104
PID 1688 wrote to memory of 3232	1688	chkdsk.exe	104

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3484
- C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.exe
  "C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.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:2588
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sIYfcmrdwEC" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFAFA.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4856
- - C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.exe
    "C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.exe"
    3⤵
    PID:388
- - C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.exe
    "C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2128
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1688
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3232

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

2

T1012

System Information Discovery

3

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

memory/1688-26-0x0000000000D20000-0x0000000000D4F000-memory.dmp

Filesize
188KB

Download
memory/1688-25-0x0000000000350000-0x000000000035A000-memory.dmp

Filesize
40KB

Download
memory/1688-24-0x0000000000350000-0x000000000035A000-memory.dmp

Filesize
40KB

Download
memory/2128-16-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2128-21-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2128-22-0x0000000001110000-0x0000000001124000-memory.dmp

Filesize
80KB

Download
memory/2128-19-0x00000000015B0000-0x00000000018FA000-memory.dmp

Filesize
3.3MB

Download
memory/2588-6-0x0000000005120000-0x000000000512A000-memory.dmp

Filesize
40KB

Download
memory/2588-4-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/2588-9-0x0000000006810000-0x00000000068AC000-memory.dmp

Filesize
624KB

Download
memory/2588-10-0x00000000068B0000-0x0000000006908000-memory.dmp

Filesize
352KB

Download
memory/2588-7-0x0000000074FBE000-0x0000000074FBF000-memory.dmp

Filesize
4KB

Download
memory/2588-18-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/2588-0-0x0000000074FBE000-0x0000000074FBF000-memory.dmp

Filesize
4KB

Download
memory/2588-1-0x0000000000550000-0x00000000005AE000-memory.dmp

Filesize
376KB

Download
memory/2588-5-0x0000000005000000-0x000000000500A000-memory.dmp

Filesize
40KB

Download
memory/2588-8-0x0000000074FB0000-0x0000000075760000-memory.dmp

Filesize
7.7MB

Download
memory/2588-3-0x0000000004F60000-0x0000000004FF2000-memory.dmp

Filesize
584KB

Download
memory/2588-2-0x00000000055E0000-0x0000000005B84000-memory.dmp

Filesize
5.6MB

Download
memory/3484-23-0x0000000002800000-0x000000000299F000-memory.dmp

Filesize
1.6MB

Download
memory/3484-27-0x0000000002800000-0x000000000299F000-memory.dmp

Filesize
1.6MB

Download
memory/3484-31-0x0000000007E60000-0x0000000007FA8000-memory.dmp

Filesize
1.3MB

Download
memory/3484-32-0x0000000007E60000-0x0000000007FA8000-memory.dmp

Filesize
1.3MB

Download
memory/3484-34-0x0000000007E60000-0x0000000007FA8000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads