formbook | 8fe13da45a5732ae42c27687b9cf9105a3f2028857729bdfbe3ae31514a6b298

General

Target

winlog.exe
Size

931KB
MD5

b75247013200d602f98dc3801d2bde2f
SHA1

3327c5cd3ecd636b72c335166fe709b955a32285
SHA256

8fe13da45a5732ae42c27687b9cf9105a3f2028857729bdfbe3ae31514a6b298
SHA512

aa0b977c81b0e97433e61e21cc1e13cbc8821b5ff4d0b3e7554519051139dc661b4c9c0d8e99a6ff4148968d9f04653c85b411944f42fec29bdd4c70228229f9

Score

10^/10

formbook xloader loader rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.learnhour.net/eaud/

Decoy

modshiro.com

mademarketingoss.com

austinjourls.info

wayupteam.com

crossingfinger.com

interseptors.com

gigashit.com

livetigo.com

halamankuningindonesia.com

windhammills.com

aylinahmet.com

mbacexonan.website

shopboxbarcelona.com

youyeslive.com

coonlinesportsbooks.com

guorunme.com

putlocker2.site

pencueaidnetwork.com

likevector.com

vulcanudachi-proclub.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1676-8-0x0000000000400000-0x0000000000428000-memory.dmp	xloader
behavioral1/memory/1676-9-0x000000000041D030-mapping.dmp	xloader
behavioral1/memory/1020-16-0x0000000000080000-0x00000000000A8000-memory.dmp	xloader

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

772 cmd.exe

pid	process
772	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

winlog.exewinlog.exechkdsk.exe

description	pid	process	target process
PID 296 set thread context of 1676	296	winlog.exe	winlog.exe
PID 1676 set thread context of 1244	1676	winlog.exe	Explorer.EXE
PID 1020 set thread context of 1244	1020	chkdsk.exe	Explorer.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

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

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

winlog.exechkdsk.exe

pid	process
1676	winlog.exe
1676	winlog.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe
1020	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1244 Explorer.EXE
Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

winlog.exechkdsk.exe

pid process

1676 winlog.exe
1676 winlog.exe
1676 winlog.exe
1020 chkdsk.exe
1020 chkdsk.exe

pid	process
1244	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

winlog.exechkdsk.exeExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	1676	winlog.exe
Token: SeDebugPrivilege	1020	chkdsk.exe
Token: SeShutdownPrivilege	1244	Explorer.EXE
Token: SeShutdownPrivilege	1244	Explorer.EXE

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE

pid	process
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE

pid	process
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

winlog.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 296 wrote to memory of 1676	296	winlog.exe	winlog.exe
PID 296 wrote to memory of 1676	296	winlog.exe	winlog.exe
PID 296 wrote to memory of 1676	296	winlog.exe	winlog.exe
PID 296 wrote to memory of 1676	296	winlog.exe	winlog.exe
PID 296 wrote to memory of 1676	296	winlog.exe	winlog.exe
PID 296 wrote to memory of 1676	296	winlog.exe	winlog.exe
PID 296 wrote to memory of 1676	296	winlog.exe	winlog.exe
PID 1244 wrote to memory of 1020	1244	Explorer.EXE	chkdsk.exe
PID 1244 wrote to memory of 1020	1244	Explorer.EXE	chkdsk.exe
PID 1244 wrote to memory of 1020	1244	Explorer.EXE	chkdsk.exe
PID 1244 wrote to memory of 1020	1244	Explorer.EXE	chkdsk.exe
PID 1020 wrote to memory of 772	1020	chkdsk.exe	cmd.exe
PID 1020 wrote to memory of 772	1020	chkdsk.exe	cmd.exe
PID 1020 wrote to memory of 772	1020	chkdsk.exe	cmd.exe
PID 1020 wrote to memory of 772	1020	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1244

C:\Users\Admin\AppData\Local\Temp\winlog.exe
"C:\Users\Admin\AppData\Local\Temp\winlog.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:296

C:\Users\Admin\AppData\Local\Temp\winlog.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1676

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:1020

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\winlog.exe"
3⤵
- Deletes itself
PID:772

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/296-2-0x00000000748D0000-0x0000000074FBE000-memory.dmp

Filesize
6.9MB

Download
memory/296-3-0x0000000000B20000-0x0000000000B21000-memory.dmp

Filesize
4KB

Download
memory/296-5-0x00000000043C0000-0x00000000043C1000-memory.dmp

Filesize
4KB

Download
memory/296-6-0x0000000000640000-0x000000000064E000-memory.dmp

Filesize
56KB

Download
memory/296-7-0x0000000004B90000-0x0000000004BD8000-memory.dmp

Filesize
288KB

Download
memory/772-17-0x0000000000000000-mapping.dmp

Download
memory/1020-16-0x0000000000080000-0x00000000000A8000-memory.dmp

Filesize
160KB

Download
memory/1020-14-0x0000000000000000-mapping.dmp

Download
memory/1020-15-0x0000000000570000-0x0000000000577000-memory.dmp

Filesize
28KB

Download
memory/1020-18-0x00000000020B0000-0x00000000023B3000-memory.dmp

Filesize
3.0MB

Download
memory/1020-19-0x0000000000340000-0x00000000003CF000-memory.dmp

Filesize
572KB

Download
memory/1244-13-0x0000000006F90000-0x000000000710A000-memory.dmp

Filesize
1.5MB

Download
memory/1244-20-0x00000000074B0000-0x0000000007603000-memory.dmp

Filesize
1.3MB

Download
memory/1676-11-0x0000000000160000-0x0000000000170000-memory.dmp

Filesize
64KB

Download
memory/1676-12-0x0000000000C10000-0x0000000000F13000-memory.dmp

Filesize
3.0MB

Download
memory/1676-9-0x000000000041D030-mapping.dmp

Download
memory/1676-8-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads