formbook | 7d51363f1fc990710be0a463a7123a5c5cbe532e81164b1c43d4a159a89dadeb

General

Target

4500295678.exe
Size

763KB
MD5

0294badebae62dd7e03d329fb35b2395
SHA1

e44bae4b5c71c79a11c22fe97d45bb027822b4cd
SHA256

7d51363f1fc990710be0a463a7123a5c5cbe532e81164b1c43d4a159a89dadeb
SHA512

fd53e307148a44af3c03025591bfe7a5e6e95daf25dc3eb089f2c4ebdedf1357ce1c4f7970c56ceba3cacf04caea53acac242d21e296126316d98cdf369157e8
SSDEEP

12288:gTkSi8uZXy8E6AvHiCx62iNOIFDWfAK1LkD+4oGN/XgYOHK6+kLcz3hi3pm+P0/Q:x18uNy8UaC619FDWIXy4oGA3+eY3hkmi

Score

10^/10

formbook xloader zzun loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

zzun

Decoy

JnNtRHyNupy0GqRzAcasu7hb4rc=

Qv593NGLE7p9UNSaVkPXljAJm2QCNnc=

ePArIFWvjkkMgVEVhw4M4Jk=

26rqUwJ7dD0AiDI=

pBAxMHeK741QFw==

kHD7TPt5846pUMTX

56UnjFjHL1i0j659h3LymRnHpQj+SshC

4vKlKHflPqmWXRbrRwfPtrhb4rc=

6LBd4qButFAi

phMzGll8Ue7Fu+inq5cdnPaSugG3

NKswiQGCvZoG5FgsdHEI

rtTHnuUY8M1qVcXV

SOmECrlAt2oGAA==

L1ep9adutFAi

/UE+/AyvE6uEl28weFI=

IP+xMPQxJR4NE6TK

xvW5GN9/rqA5YUoOVt185Sf7Uw==

fRFNW9DhxL6VF7LA

KFYTfkaY741QFw==

W4JGvMBmt2oGAA==

Extracted

Family

xloader

Version

2.9

Campaign

zzun

Decoy

JnNtRHyNupy0GqRzAcasu7hb4rc=

Qv593NGLE7p9UNSaVkPXljAJm2QCNnc=

ePArIFWvjkkMgVEVhw4M4Jk=

26rqUwJ7dD0AiDI=

pBAxMHeK741QFw==

kHD7TPt5846pUMTX

56UnjFjHL1i0j659h3LymRnHpQj+SshC

4vKlKHflPqmWXRbrRwfPtrhb4rc=

6LBd4qButFAi

phMzGll8Ue7Fu+inq5cdnPaSugG3

NKswiQGCvZoG5FgsdHEI

rtTHnuUY8M1qVcXV

SOmECrlAt2oGAA==

L1ep9adutFAi

/UE+/AyvE6uEl28weFI=

IP+xMPQxJR4NE6TK

xvW5GN9/rqA5YUoOVt185Sf7Uw==

fRFNW9DhxL6VF7LA

KFYTfkaY741QFw==

W4JGvMBmt2oGAA==

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 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/2044-62-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/2044-63-0x000000000041F6F0-mapping.dmp	xloader
behavioral1/memory/2044-65-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/556-72-0x00000000000F0000-0x000000000011C000-memory.dmp	xloader
behavioral1/memory/556-76-0x00000000000F0000-0x000000000011C000-memory.dmp	xloader

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

Processes:

4500295678.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Control Panel\International\Geo\Nation	4500295678.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

760 cmd.exe

pid	process
760	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

chkdsk.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	chkdsk.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\HHM81NWHYZ = "C:\\Program Files (x86)\\Twptlwb\\vgaipbxn080.exe"	chkdsk.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

4500295678.exe4500295678.exechkdsk.exe

description	pid	process	target process
PID 964 set thread context of 2044	964	4500295678.exe	4500295678.exe
PID 2044 set thread context of 1376	2044	4500295678.exe	Explorer.EXE
PID 556 set thread context of 1376	556	chkdsk.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

chkdsk.exe

description ioc process

File opened for modification C:\Program Files (x86)\Twptlwb\vgaipbxn080.exe chkdsk.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
File opened for modification	C:\Program Files (x86)\Twptlwb\vgaipbxn080.exe	chkdsk.exe

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

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

chkdsk.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3385717845-2518323428-350143044-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

4500295678.exechkdsk.exe

pid	process
2044	4500295678.exe
2044	4500295678.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe
556	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

1376 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

4500295678.exechkdsk.exe

pid process

2044 4500295678.exe
2044 4500295678.exe
2044 4500295678.exe
556 chkdsk.exe
556 chkdsk.exe
556 chkdsk.exe
556 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

4500295678.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 2044 4500295678.exe
Token: SeDebugPrivilege 556 chkdsk.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1376 Explorer.EXE
1376 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1376 Explorer.EXE
1376 Explorer.EXE

pid	process
1376	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	2044	4500295678.exe
Token: SeDebugPrivilege	556	chkdsk.exe

pid	process
1376	Explorer.EXE
1376	Explorer.EXE

pid	process
1376	Explorer.EXE
1376	Explorer.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

4500295678.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 964 wrote to memory of 2044	964	4500295678.exe	4500295678.exe
PID 964 wrote to memory of 2044	964	4500295678.exe	4500295678.exe
PID 964 wrote to memory of 2044	964	4500295678.exe	4500295678.exe
PID 964 wrote to memory of 2044	964	4500295678.exe	4500295678.exe
PID 964 wrote to memory of 2044	964	4500295678.exe	4500295678.exe
PID 964 wrote to memory of 2044	964	4500295678.exe	4500295678.exe
PID 964 wrote to memory of 2044	964	4500295678.exe	4500295678.exe
PID 1376 wrote to memory of 556	1376	Explorer.EXE	chkdsk.exe
PID 1376 wrote to memory of 556	1376	Explorer.EXE	chkdsk.exe
PID 1376 wrote to memory of 556	1376	Explorer.EXE	chkdsk.exe
PID 1376 wrote to memory of 556	1376	Explorer.EXE	chkdsk.exe
PID 556 wrote to memory of 760	556	chkdsk.exe	cmd.exe
PID 556 wrote to memory of 760	556	chkdsk.exe	cmd.exe
PID 556 wrote to memory of 760	556	chkdsk.exe	cmd.exe
PID 556 wrote to memory of 760	556	chkdsk.exe	cmd.exe
PID 556 wrote to memory of 928	556	chkdsk.exe	Firefox.exe
PID 556 wrote to memory of 928	556	chkdsk.exe	Firefox.exe
PID 556 wrote to memory of 928	556	chkdsk.exe	Firefox.exe
PID 556 wrote to memory of 928	556	chkdsk.exe	Firefox.exe
PID 556 wrote to memory of 928	556	chkdsk.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1376

C:\Users\Admin\AppData\Local\Temp\4500295678.exe
"C:\Users\Admin\AppData\Local\Temp\4500295678.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:964

C:\Users\Admin\AppData\Local\Temp\4500295678.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2044

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:556

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\4500295678.exe"
3⤵
- Deletes itself
PID:760

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:928

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/556-69-0x0000000000000000-mapping.dmp

Download
memory/556-71-0x0000000000040000-0x0000000000047000-memory.dmp

Filesize
28KB

Download
memory/556-76-0x00000000000F0000-0x000000000011C000-memory.dmp

Filesize
176KB

Download
memory/556-74-0x00000000021F0000-0x0000000002280000-memory.dmp

Filesize
576KB

Download
memory/556-73-0x0000000001EE0000-0x00000000021E3000-memory.dmp

Filesize
3.0MB

Download
memory/556-72-0x00000000000F0000-0x000000000011C000-memory.dmp

Filesize
176KB

Download
memory/760-70-0x0000000000000000-mapping.dmp

Download
memory/964-55-0x0000000076411000-0x0000000076413000-memory.dmp

Filesize
8KB

Download
memory/964-56-0x00000000004C0000-0x00000000004D2000-memory.dmp

Filesize
72KB

Download
memory/964-57-0x0000000005020000-0x00000000050A2000-memory.dmp

Filesize
520KB

Download
memory/964-58-0x00000000020B0000-0x00000000020E2000-memory.dmp

Filesize
200KB

Download
memory/964-54-0x0000000000BC0000-0x0000000000C84000-memory.dmp

Filesize
784KB

Download
memory/1376-77-0x00000000061A0000-0x0000000006299000-memory.dmp

Filesize
996KB

Download
memory/1376-68-0x0000000007170000-0x0000000007314000-memory.dmp

Filesize
1.6MB

Download
memory/1376-75-0x00000000061A0000-0x0000000006299000-memory.dmp

Filesize
996KB

Download
memory/2044-59-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2044-67-0x0000000000290000-0x00000000002A1000-memory.dmp

Filesize
68KB

Download
memory/2044-66-0x0000000000C90000-0x0000000000F93000-memory.dmp

Filesize
3.0MB

Download
memory/2044-65-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2044-63-0x000000000041F6F0-mapping.dmp

Download
memory/2044-62-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2044-60-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads