formbook | cabb105b68b42b80ce9e42a35fdc198b147068f34a9b637c4dfab7b71987f00c

General

Target

MT103_Advice.exe
Size

498KB
MD5

a0710a7b2266067d2761c2c00b3781c9
SHA1

838c7b45cfd7333c0681d6a3b5b17d486f8fb509
SHA256

cabb105b68b42b80ce9e42a35fdc198b147068f34a9b637c4dfab7b71987f00c
SHA512

38fd65030a2e2e7230c2469fd1816834d5d034848fa06cc8f63b6d31c998a6a6ba851e80c3134470e21c80f303b6bdce32bebba1092f1eb6abe5535df5651e0c

Score

10^/10

formbook xloader zzun loader persistence rat spyware stealer suricata trojan

Malware Config

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
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Xloader payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1692-62-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1692-63-0x000000000041F6F0-mapping.dmp	xloader
behavioral1/memory/1692-65-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1716-72-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader
behavioral1/memory/1716-76-0x0000000000080000-0x00000000000AC000-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:

MT103_Advice.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation	MT103_Advice.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1088 cmd.exe

pid	process
1088	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\K62XTZPHUB = "C:\\Program Files (x86)\\Gmnupd\\vgaebgx.exe"	chkdsk.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

MT103_Advice.exeMT103_Advice.exechkdsk.exe

description	pid	process	target process
PID 960 set thread context of 1692	960	MT103_Advice.exe	MT103_Advice.exe
PID 1692 set thread context of 1260	1692	MT103_Advice.exe	Explorer.EXE
PID 1716 set thread context of 1260	1716	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)\Gmnupd\vgaebgx.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)\Gmnupd\vgaebgx.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-1-5-21-2277218442-1199762539-2004043321-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

MT103_Advice.exechkdsk.exe

pid	process
1692	MT103_Advice.exe
1692	MT103_Advice.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe
1716	chkdsk.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

MT103_Advice.exechkdsk.exe

pid process

1692 MT103_Advice.exe
1692 MT103_Advice.exe
1692 MT103_Advice.exe
1716 chkdsk.exe
1716 chkdsk.exe
1716 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

MT103_Advice.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 1692 MT103_Advice.exe
Token: SeDebugPrivilege 1716 chkdsk.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1260 Explorer.EXE
1260 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1260 Explorer.EXE
1260 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	1692	MT103_Advice.exe
Token: SeDebugPrivilege	1716	chkdsk.exe

pid	process
1260	Explorer.EXE
1260	Explorer.EXE

pid	process
1260	Explorer.EXE
1260	Explorer.EXE

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

MT103_Advice.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 960 wrote to memory of 1692	960	MT103_Advice.exe	MT103_Advice.exe
PID 960 wrote to memory of 1692	960	MT103_Advice.exe	MT103_Advice.exe
PID 960 wrote to memory of 1692	960	MT103_Advice.exe	MT103_Advice.exe
PID 960 wrote to memory of 1692	960	MT103_Advice.exe	MT103_Advice.exe
PID 960 wrote to memory of 1692	960	MT103_Advice.exe	MT103_Advice.exe
PID 960 wrote to memory of 1692	960	MT103_Advice.exe	MT103_Advice.exe
PID 960 wrote to memory of 1692	960	MT103_Advice.exe	MT103_Advice.exe
PID 1260 wrote to memory of 1716	1260	Explorer.EXE	chkdsk.exe
PID 1260 wrote to memory of 1716	1260	Explorer.EXE	chkdsk.exe
PID 1260 wrote to memory of 1716	1260	Explorer.EXE	chkdsk.exe
PID 1260 wrote to memory of 1716	1260	Explorer.EXE	chkdsk.exe
PID 1716 wrote to memory of 1088	1716	chkdsk.exe	cmd.exe
PID 1716 wrote to memory of 1088	1716	chkdsk.exe	cmd.exe
PID 1716 wrote to memory of 1088	1716	chkdsk.exe	cmd.exe
PID 1716 wrote to memory of 1088	1716	chkdsk.exe	cmd.exe
PID 1716 wrote to memory of 1124	1716	chkdsk.exe	Firefox.exe
PID 1716 wrote to memory of 1124	1716	chkdsk.exe	Firefox.exe
PID 1716 wrote to memory of 1124	1716	chkdsk.exe	Firefox.exe
PID 1716 wrote to memory of 1124	1716	chkdsk.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1260

C:\Users\Admin\AppData\Local\Temp\MT103_Advice.exe
"C:\Users\Admin\AppData\Local\Temp\MT103_Advice.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:960

C:\Users\Admin\AppData\Local\Temp\MT103_Advice.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1692

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:1716

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\MT103_Advice.exe"
3⤵
- Deletes itself
PID:1088

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1124

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

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Downloads

memory/960-54-0x0000000000B80000-0x0000000000C02000-memory.dmp

Filesize
520KB

Download
memory/960-55-0x0000000075801000-0x0000000075803000-memory.dmp

Filesize
8KB

Download
memory/960-56-0x0000000000220000-0x000000000022A000-memory.dmp

Filesize
40KB

Download
memory/960-57-0x0000000005270000-0x00000000052F4000-memory.dmp

Filesize
528KB

Download
memory/960-58-0x0000000000730000-0x0000000000762000-memory.dmp

Filesize
200KB

Download
memory/1088-70-0x0000000000000000-mapping.dmp

Download
memory/1260-77-0x0000000008D00000-0x0000000008E6F000-memory.dmp

Filesize
1.4MB

Download
memory/1260-75-0x0000000008D00000-0x0000000008E6F000-memory.dmp

Filesize
1.4MB

Download
memory/1260-68-0x0000000006B50000-0x0000000006CAA000-memory.dmp

Filesize
1.4MB

Download
memory/1692-66-0x0000000000C10000-0x0000000000F13000-memory.dmp

Filesize
3.0MB

Download
memory/1692-65-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1692-67-0x0000000000170000-0x0000000000181000-memory.dmp

Filesize
68KB

Download
memory/1692-63-0x000000000041F6F0-mapping.dmp

Download
memory/1692-62-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1692-60-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1692-59-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1716-69-0x0000000000000000-mapping.dmp

Download
memory/1716-71-0x0000000000DF0000-0x0000000000DF7000-memory.dmp

Filesize
28KB

Download
memory/1716-72-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/1716-73-0x0000000002200000-0x0000000002503000-memory.dmp

Filesize
3.0MB

Download
memory/1716-74-0x0000000000950000-0x00000000009E0000-memory.dmp

Filesize
576KB

Download
memory/1716-76-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads