formbook | 7fd0e394a9d74592a74d04b3dccf2dcf8457d0e894cadadbf999c327e9b3940e

General

Target

tmp.exe
Size

632KB
MD5

cb38d8143b2216edab036acee36f25b4
SHA1

1401d9123df44612f599865e9b2df8941779c687
SHA256

7fd0e394a9d74592a74d04b3dccf2dcf8457d0e894cadadbf999c327e9b3940e
SHA512

15315313dc0cc805771c7a3ccdf20851e39279a001272cdf71e1078fd7b907d83ffa6fc6292e83743963849ea1b2433036e746c8377edf8f6c9dcb2f76e2f010

Score

10^/10

formbook xloader loader persistence rat spyware stealer suricata trojan

Malware Config

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/2020-64-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/2020-65-0x00000000004201D0-mapping.dmp	xloader
behavioral1/memory/2020-67-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1036-73-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader
behavioral1/memory/1036-78-0x0000000000080000-0x00000000000AC000-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:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Control Panel\International\Geo\Nation tmp.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

572 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

chkdsk.exe

pid process

1036 chkdsk.exe

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

pid	process
572	cmd.exe

pid	process
1036	chkdsk.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\AZTPZLIX = "C:\\Program Files (x86)\\Jzv1h8\\mfc1bgxnno.exe"	chkdsk.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

tmp.exetmp.exechkdsk.exe

description	pid	process	target process
PID 384 set thread context of 2020	384	tmp.exe	tmp.exe
PID 2020 set thread context of 1236	2020	tmp.exe	Explorer.EXE
PID 1036 set thread context of 1236	1036	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)\Jzv1h8\mfc1bgxnno.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)\Jzv1h8\mfc1bgxnno.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 16 IoCs

Processes:

tmp.exetmp.exechkdsk.exe

pid	process
384	tmp.exe
2020	tmp.exe
2020	tmp.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

tmp.exechkdsk.exe

pid process

2020 tmp.exe
2020 tmp.exe
2020 tmp.exe
1036 chkdsk.exe
1036 chkdsk.exe
1036 chkdsk.exe
1036 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

tmp.exetmp.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 384 tmp.exe
Token: SeDebugPrivilege 2020 tmp.exe
Token: SeDebugPrivilege 1036 chkdsk.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE

pid	process
2020	tmp.exe
2020	tmp.exe
2020	tmp.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe
1036	chkdsk.exe

description	pid	process
Token: SeDebugPrivilege	384	tmp.exe
Token: SeDebugPrivilege	2020	tmp.exe
Token: SeDebugPrivilege	1036	chkdsk.exe

pid	process
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1236	Explorer.EXE
1236	Explorer.EXE

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

tmp.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 384 wrote to memory of 1996	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 1996	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 1996	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 1996	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 2020	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 2020	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 2020	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 2020	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 2020	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 2020	384	tmp.exe	tmp.exe
PID 384 wrote to memory of 2020	384	tmp.exe	tmp.exe
PID 1236 wrote to memory of 1036	1236	Explorer.EXE	chkdsk.exe
PID 1236 wrote to memory of 1036	1236	Explorer.EXE	chkdsk.exe
PID 1236 wrote to memory of 1036	1236	Explorer.EXE	chkdsk.exe
PID 1236 wrote to memory of 1036	1236	Explorer.EXE	chkdsk.exe
PID 1036 wrote to memory of 572	1036	chkdsk.exe	cmd.exe
PID 1036 wrote to memory of 572	1036	chkdsk.exe	cmd.exe
PID 1036 wrote to memory of 572	1036	chkdsk.exe	cmd.exe
PID 1036 wrote to memory of 572	1036	chkdsk.exe	cmd.exe
PID 1036 wrote to memory of 668	1036	chkdsk.exe	Firefox.exe
PID 1036 wrote to memory of 668	1036	chkdsk.exe	Firefox.exe
PID 1036 wrote to memory of 668	1036	chkdsk.exe	Firefox.exe
PID 1036 wrote to memory of 668	1036	chkdsk.exe	Firefox.exe
PID 1036 wrote to memory of 668	1036	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:1236

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:384

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
PID:1996

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2020

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Loads dropped DLL
- 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:1036

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
- Deletes itself
PID:572

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:668

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

Loading Replay Monitor...

Downloads

\Users\Admin\AppData\Local\Temp\sqlite3.dll
Filesize
628KB

MD5
e3b107beaf9eaab93d09738d7dcb0946

SHA1
e625eac28fad8d1ed8544a35b9e54e596313b266

SHA256
8dccdffda1babc90e9917e7927c7387e4ca8e556f0bb94aace207c998a289223

SHA512
c08038d6c7c527ae1e13540358c2a117e5aa6275643b2d88e19e1dc7dd0aa4191c74598e385c57d854866c2de31688fb3640bc7e3a2303b8291154375398305a

Download Submit
memory/384-54-0x0000000000C20000-0x0000000000CC4000-memory.dmp

Filesize
656KB

Download
memory/384-55-0x00000000763E1000-0x00000000763E3000-memory.dmp

Filesize
8KB

Download
memory/384-56-0x0000000002260000-0x00000000022E4000-memory.dmp

Filesize
528KB

Download
memory/384-57-0x0000000000290000-0x00000000002B0000-memory.dmp

Filesize
128KB

Download
memory/384-58-0x00000000004D0000-0x00000000004DE000-memory.dmp

Filesize
56KB

Download
memory/384-59-0x0000000007E70000-0x0000000007EE6000-memory.dmp

Filesize
472KB

Download
memory/384-60-0x0000000000BC0000-0x0000000000BF2000-memory.dmp

Filesize
200KB

Download
memory/572-74-0x0000000000000000-mapping.dmp

Download
memory/1036-75-0x0000000001F00000-0x0000000002203000-memory.dmp

Filesize
3.0MB

Download
memory/1036-76-0x0000000001DF0000-0x0000000001E80000-memory.dmp

Filesize
576KB

Download
memory/1036-78-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/1036-71-0x0000000000000000-mapping.dmp

Download
memory/1036-72-0x00000000002F0000-0x00000000002F7000-memory.dmp

Filesize
28KB

Download
memory/1036-73-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/1236-79-0x0000000006A70000-0x0000000006BB9000-memory.dmp

Filesize
1.3MB

Download
memory/1236-77-0x0000000006A70000-0x0000000006BB9000-memory.dmp

Filesize
1.3MB

Download
memory/1236-70-0x0000000004AC0000-0x0000000004C3B000-memory.dmp

Filesize
1.5MB

Download
memory/2020-69-0x0000000000140000-0x0000000000151000-memory.dmp

Filesize
68KB

Download
memory/2020-62-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2020-64-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2020-65-0x00000000004201D0-mapping.dmp

Download
memory/2020-68-0x0000000000CD0000-0x0000000000FD3000-memory.dmp

Filesize
3.0MB

Download
memory/2020-67-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2020-61-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads