formbook | bf229f5e63a19ca8043605dc5bf8e34f1aee23edad8f172d9a563a73356264ae

General

Target

PO.exe
Size

640KB
MD5

8f48c27472b465189d4e230924656e86
SHA1

692cbead7f5fab1effda3d83fbe7311b62e63c58
SHA256

bf229f5e63a19ca8043605dc5bf8e34f1aee23edad8f172d9a563a73356264ae
SHA512

e09b2cbe2cb2ffbf8abf485c9a2004ebf8c3fc3bb201b2bfdcca7aef6a2bd6c5b1e4aef1eda6c1126df411568188b58f8ee9a4b28fffd1fdcce09e287e8966d5

Score

10^/10

formbook xloader zzun loader persistence rat spyware stealer 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

Xloader payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/940-62-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/940-63-0x000000000041F6F0-mapping.dmp	xloader
behavioral1/memory/940-65-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral1/memory/1288-71-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader
behavioral1/memory/1288-76-0x0000000000080000-0x00000000000AC000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

wininit.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	wininit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Z4NHMLUX7 = "C:\\Program Files (x86)\\Rllxdwht\\ms7nmxef.exe"	wininit.exe

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:

PO.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Control Panel\International\Geo\Nation PO.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1120 cmd.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3762437355-3468409815-1164039494-1000\Control Panel\International\Geo\Nation	PO.exe

pid	process
1120	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

PO.exePO.exewininit.exe

description	pid	process	target process
PID 960 set thread context of 940	960	PO.exe	PO.exe
PID 940 set thread context of 1204	940	PO.exe	Explorer.EXE
PID 1288 set thread context of 1204	1288	wininit.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

wininit.exe

description ioc process

File opened for modification C:\Program Files (x86)\Rllxdwht\ms7nmxef.exe wininit.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Rllxdwht\ms7nmxef.exe	wininit.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

wininit.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-3762437355-3468409815-1164039494-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wininit.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

PO.exePO.exewininit.exe

pid	process
960	PO.exe
940	PO.exe
940	PO.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

PO.exewininit.exe

pid process

940 PO.exe
940 PO.exe
940 PO.exe
1288 wininit.exe
1288 wininit.exe
1288 wininit.exe
1288 wininit.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

PO.exePO.exewininit.exe

description pid process

Token: SeDebugPrivilege 960 PO.exe
Token: SeDebugPrivilege 940 PO.exe
Token: SeDebugPrivilege 1288 wininit.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1204 Explorer.EXE
1204 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1204 Explorer.EXE
1204 Explorer.EXE

pid	process
940	PO.exe
940	PO.exe
940	PO.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe
1288	wininit.exe

description	pid	process
Token: SeDebugPrivilege	960	PO.exe
Token: SeDebugPrivilege	940	PO.exe
Token: SeDebugPrivilege	1288	wininit.exe

pid	process
1204	Explorer.EXE
1204	Explorer.EXE

pid	process
1204	Explorer.EXE
1204	Explorer.EXE

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

PO.exeExplorer.EXEwininit.exe

description	pid	process	target process
PID 960 wrote to memory of 940	960	PO.exe	PO.exe
PID 960 wrote to memory of 940	960	PO.exe	PO.exe
PID 960 wrote to memory of 940	960	PO.exe	PO.exe
PID 960 wrote to memory of 940	960	PO.exe	PO.exe
PID 960 wrote to memory of 940	960	PO.exe	PO.exe
PID 960 wrote to memory of 940	960	PO.exe	PO.exe
PID 960 wrote to memory of 940	960	PO.exe	PO.exe
PID 1204 wrote to memory of 1288	1204	Explorer.EXE	wininit.exe
PID 1204 wrote to memory of 1288	1204	Explorer.EXE	wininit.exe
PID 1204 wrote to memory of 1288	1204	Explorer.EXE	wininit.exe
PID 1204 wrote to memory of 1288	1204	Explorer.EXE	wininit.exe
PID 1288 wrote to memory of 1120	1288	wininit.exe	cmd.exe
PID 1288 wrote to memory of 1120	1288	wininit.exe	cmd.exe
PID 1288 wrote to memory of 1120	1288	wininit.exe	cmd.exe
PID 1288 wrote to memory of 1120	1288	wininit.exe	cmd.exe
PID 1288 wrote to memory of 1828	1288	wininit.exe	Firefox.exe
PID 1288 wrote to memory of 1828	1288	wininit.exe	Firefox.exe
PID 1288 wrote to memory of 1828	1288	wininit.exe	Firefox.exe
PID 1288 wrote to memory of 1828	1288	wininit.exe	Firefox.exe
PID 1288 wrote to memory of 1828	1288	wininit.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:1204

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

C:\Users\Admin\AppData\Local\Temp\PO.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:940

C:\Windows\SysWOW64\wininit.exe
"C:\Windows\SysWOW64\wininit.exe"
2⤵
- Adds policy Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1288

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\PO.exe"
3⤵
- Deletes itself
PID:1120

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1828

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/940-66-0x0000000000930000-0x0000000000C33000-memory.dmp

Filesize
3.0MB

Download
memory/940-62-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/940-67-0x0000000000240000-0x0000000000251000-memory.dmp

Filesize
68KB

Download
memory/940-63-0x000000000041F6F0-mapping.dmp

Download
memory/940-65-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/940-59-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/940-60-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/960-56-0x0000000000560000-0x000000000056A000-memory.dmp

Filesize
40KB

Download
memory/960-58-0x0000000000BC0000-0x0000000000BF2000-memory.dmp

Filesize
200KB

Download
memory/960-55-0x0000000076091000-0x0000000076093000-memory.dmp

Filesize
8KB

Download
memory/960-57-0x0000000000C40000-0x0000000000CC4000-memory.dmp

Filesize
528KB

Download
memory/960-54-0x0000000000FB0000-0x0000000001054000-memory.dmp

Filesize
656KB

Download
memory/1120-72-0x0000000000000000-mapping.dmp

Download
memory/1204-77-0x0000000004A50000-0x0000000004B0D000-memory.dmp

Filesize
756KB

Download
memory/1204-68-0x0000000004940000-0x0000000004A45000-memory.dmp

Filesize
1.0MB

Download
memory/1204-75-0x0000000004A50000-0x0000000004B0D000-memory.dmp

Filesize
756KB

Download
memory/1288-70-0x0000000000FC0000-0x0000000000FDA000-memory.dmp

Filesize
104KB

Download
memory/1288-73-0x0000000000A20000-0x0000000000D23000-memory.dmp

Filesize
3.0MB

Download
memory/1288-74-0x0000000000D30000-0x0000000000DC0000-memory.dmp

Filesize
576KB

Download
memory/1288-71-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/1288-76-0x0000000000080000-0x00000000000AC000-memory.dmp

Filesize
176KB

Download
memory/1288-69-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads