formbook | da742afc42369db1320628ca59e4f30184b456dee53c32b1b18b6b76104a4405

General

Target

invoice Ceylan 49.600€.exe
Size

352KB
MD5

74f87a533471eaa7719df1d9b0593c2a
SHA1

77a20802e1e2db283ddf605a818372a72b0d8e26
SHA256

851b20d33b8210f3d20ab4694011a0858eeb745e248a768c1e4c214efb59464b
SHA512

a65587fa689531ff0d9da0c24ed9fb01adc986353491b6cb65773c66c7d5bf3773f8ae7c87ca4e2485da442c815722cdf5633e425693a8ace5f888744c868438

Score

10^/10

formbook cl8k rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

cl8k

C2

http://www.lightiroanwgt76.xyz/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 Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/648-125-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/648-126-0x000000000041F190-mapping.dmp	formbook
behavioral2/memory/1584-133-0x0000000004D40000-0x0000000004D6F000-memory.dmp	formbook
behavioral2/memory/1584-135-0x0000000005000000-0x00000000050AE000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

Processes:

invoice Ceylan 49.600€.exeinvoice Ceylan 49.600€.exechkdsk.exe

description	pid	process	target process
PID 1244 set thread context of 648	1244	invoice Ceylan 49.600€.exe	invoice Ceylan 49.600€.exe
PID 648 set thread context of 2920	648	invoice Ceylan 49.600€.exe	Explorer.EXE
PID 1584 set thread context of 2920	1584	chkdsk.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4068 schtasks.exe
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

pid	process
4068	schtasks.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 38 IoCs

Processes:

invoice Ceylan 49.600€.exechkdsk.exe

pid	process
648	invoice Ceylan 49.600€.exe
648	invoice Ceylan 49.600€.exe
648	invoice Ceylan 49.600€.exe
648	invoice Ceylan 49.600€.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe
1584	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2920 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

invoice Ceylan 49.600€.exechkdsk.exe

pid process

648 invoice Ceylan 49.600€.exe
648 invoice Ceylan 49.600€.exe
648 invoice Ceylan 49.600€.exe
1584 chkdsk.exe
1584 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

invoice Ceylan 49.600€.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 648 invoice Ceylan 49.600€.exe
Token: SeDebugPrivilege 1584 chkdsk.exe

pid	process
2920	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	648	invoice Ceylan 49.600€.exe
Token: SeDebugPrivilege	1584	chkdsk.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

invoice Ceylan 49.600€.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 1244 wrote to memory of 4068	1244	invoice Ceylan 49.600€.exe	schtasks.exe
PID 1244 wrote to memory of 4068	1244	invoice Ceylan 49.600€.exe	schtasks.exe
PID 1244 wrote to memory of 4068	1244	invoice Ceylan 49.600€.exe	schtasks.exe
PID 1244 wrote to memory of 648	1244	invoice Ceylan 49.600€.exe	invoice Ceylan 49.600€.exe
PID 1244 wrote to memory of 648	1244	invoice Ceylan 49.600€.exe	invoice Ceylan 49.600€.exe
PID 1244 wrote to memory of 648	1244	invoice Ceylan 49.600€.exe	invoice Ceylan 49.600€.exe
PID 1244 wrote to memory of 648	1244	invoice Ceylan 49.600€.exe	invoice Ceylan 49.600€.exe
PID 1244 wrote to memory of 648	1244	invoice Ceylan 49.600€.exe	invoice Ceylan 49.600€.exe
PID 1244 wrote to memory of 648	1244	invoice Ceylan 49.600€.exe	invoice Ceylan 49.600€.exe
PID 2920 wrote to memory of 1584	2920	Explorer.EXE	chkdsk.exe
PID 2920 wrote to memory of 1584	2920	Explorer.EXE	chkdsk.exe
PID 2920 wrote to memory of 1584	2920	Explorer.EXE	chkdsk.exe
PID 1584 wrote to memory of 3652	1584	chkdsk.exe	cmd.exe
PID 1584 wrote to memory of 3652	1584	chkdsk.exe	cmd.exe
PID 1584 wrote to memory of 3652	1584	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2920

C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.exe
"C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1244

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sIYfcmrdwEC" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA573.tmp"
3⤵
- Creates scheduled task(s)
PID:4068

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:648

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1584

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\invoice Ceylan 49.600€.exe"
3⤵
PID:3652

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/648-125-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/648-128-0x0000000001460000-0x0000000001780000-memory.dmp

Filesize
3.1MB

Download
memory/648-129-0x0000000001410000-0x0000000001424000-memory.dmp

Filesize
80KB

Download
memory/648-126-0x000000000041F190-mapping.dmp

Download
memory/1244-121-0x0000000007CE0000-0x0000000007CE5000-memory.dmp

Filesize
20KB

Download
memory/1244-122-0x0000000008010000-0x0000000008011000-memory.dmp

Filesize
4KB

Download
memory/1244-123-0x00000000080B0000-0x0000000008100000-memory.dmp

Filesize
320KB

Download
memory/1244-120-0x0000000005710000-0x0000000005711000-memory.dmp

Filesize
4KB

Download
memory/1244-119-0x0000000005730000-0x0000000005C2E000-memory.dmp

Filesize
5.0MB

Download
memory/1244-118-0x0000000005730000-0x0000000005731000-memory.dmp

Filesize
4KB

Download
memory/1244-117-0x0000000005C30000-0x0000000005C31000-memory.dmp

Filesize
4KB

Download
memory/1244-115-0x0000000000D50000-0x0000000000D51000-memory.dmp

Filesize
4KB

Download
memory/1584-135-0x0000000005000000-0x00000000050AE000-memory.dmp

Filesize
696KB

Download
memory/1584-136-0x0000000005440000-0x00000000054D3000-memory.dmp

Filesize
588KB

Download
memory/1584-131-0x0000000000000000-mapping.dmp

Download
memory/1584-133-0x0000000004D40000-0x0000000004D6F000-memory.dmp

Filesize
188KB

Download
memory/1584-132-0x00000000003E0000-0x00000000003EA000-memory.dmp

Filesize
40KB

Download
memory/2920-130-0x0000000004760000-0x00000000048DD000-memory.dmp

Filesize
1.5MB

Download
memory/2920-137-0x00000000048E0000-0x0000000004A4F000-memory.dmp

Filesize
1.4MB

Download
memory/3652-134-0x0000000000000000-mapping.dmp

Download
memory/4068-124-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads