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 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/2164-136-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/2164-142-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3548-145-0x0000000000BB0000-0x0000000000BDC000-memory.dmp	xloader
behavioral2/memory/3548-149-0x0000000000BB0000-0x0000000000BDC000-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:

PO.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation PO.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation	PO.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

NETSTAT.EXE

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	NETSTAT.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\UPXTDXH0JL = "C:\\Program Files (x86)\\Earg\\rbrv0zxg.exe"	NETSTAT.EXE

Suspicious use of SetThreadContext 3 IoCs

Processes:

PO.exePO.exeNETSTAT.EXE

description	pid	process	target process
PID 4616 set thread context of 2164	4616	PO.exe	PO.exe
PID 2164 set thread context of 2624	2164	PO.exe	Explorer.EXE
PID 3548 set thread context of 2624	3548	NETSTAT.EXE	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

NETSTAT.EXE

description ioc process

File opened for modification C:\Program Files (x86)\Earg\rbrv0zxg.exe NETSTAT.EXE
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command-Line Interface
T1059

Processes:

NETSTAT.EXE

pid process

3548 NETSTAT.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\Earg\rbrv0zxg.exe	NETSTAT.EXE

pid	process
3548	NETSTAT.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

NETSTAT.EXE

description	ioc	process
Key created	\Registry\User\S-1-5-21-2660308776-3705150086-26593515-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 47 IoCs

Processes:

PO.exePO.exeNETSTAT.EXE

pid	process
4616	PO.exe
2164	PO.exe
2164	PO.exe
2164	PO.exe
2164	PO.exe
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2624 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

PO.exeNETSTAT.EXE

pid process

2164 PO.exe
2164 PO.exe
2164 PO.exe
3548 NETSTAT.EXE
3548 NETSTAT.EXE
3548 NETSTAT.EXE
3548 NETSTAT.EXE
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

PO.exePO.exeNETSTAT.EXE

description pid process

Token: SeDebugPrivilege 4616 PO.exe
Token: SeDebugPrivilege 2164 PO.exe
Token: SeDebugPrivilege 3548 NETSTAT.EXE

pid	process
2624	Explorer.EXE

pid	process
2164	PO.exe
2164	PO.exe
2164	PO.exe
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE
3548	NETSTAT.EXE

description	pid	process
Token: SeDebugPrivilege	4616	PO.exe
Token: SeDebugPrivilege	2164	PO.exe
Token: SeDebugPrivilege	3548	NETSTAT.EXE

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

PO.exeExplorer.EXENETSTAT.EXE

description	pid	process	target process
PID 4616 wrote to memory of 2164	4616	PO.exe	PO.exe
PID 4616 wrote to memory of 2164	4616	PO.exe	PO.exe
PID 4616 wrote to memory of 2164	4616	PO.exe	PO.exe
PID 4616 wrote to memory of 2164	4616	PO.exe	PO.exe
PID 4616 wrote to memory of 2164	4616	PO.exe	PO.exe
PID 4616 wrote to memory of 2164	4616	PO.exe	PO.exe
PID 2624 wrote to memory of 3548	2624	Explorer.EXE	NETSTAT.EXE
PID 2624 wrote to memory of 3548	2624	Explorer.EXE	NETSTAT.EXE
PID 2624 wrote to memory of 3548	2624	Explorer.EXE	NETSTAT.EXE
PID 3548 wrote to memory of 1136	3548	NETSTAT.EXE	cmd.exe
PID 3548 wrote to memory of 1136	3548	NETSTAT.EXE	cmd.exe
PID 3548 wrote to memory of 1136	3548	NETSTAT.EXE	cmd.exe
PID 3548 wrote to memory of 2576	3548	NETSTAT.EXE	cmd.exe
PID 3548 wrote to memory of 2576	3548	NETSTAT.EXE	cmd.exe
PID 3548 wrote to memory of 2576	3548	NETSTAT.EXE	cmd.exe
PID 3548 wrote to memory of 3568	3548	NETSTAT.EXE	cmd.exe
PID 3548 wrote to memory of 3568	3548	NETSTAT.EXE	cmd.exe
PID 3548 wrote to memory of 3568	3548	NETSTAT.EXE	cmd.exe
PID 3548 wrote to memory of 3816	3548	NETSTAT.EXE	Firefox.exe
PID 3548 wrote to memory of 3816	3548	NETSTAT.EXE	Firefox.exe
PID 3548 wrote to memory of 3816	3548	NETSTAT.EXE	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2624

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:4616

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:2164

C:\Windows\SysWOW64\NETSTAT.EXE
"C:\Windows\SysWOW64\NETSTAT.EXE"
2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Gathers network information
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3548

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\PO.exe"
3⤵
PID:1136

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:2576

C:\Windows\SysWOW64\cmd.exe
/c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
3⤵
PID:3568

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:3816

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Command-Line Interface

1

T1059

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
48KB

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

Download Submit
memory/1136-143-0x0000000000000000-mapping.dmp

Download
memory/2164-136-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2164-142-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2164-135-0x0000000000000000-mapping.dmp

Download
memory/2164-138-0x0000000001120000-0x000000000146A000-memory.dmp

Filesize
3.3MB

Download
memory/2164-139-0x0000000000C60000-0x0000000000C71000-memory.dmp

Filesize
68KB

Download
memory/2576-151-0x0000000000000000-mapping.dmp

Download
memory/2624-150-0x0000000007B20000-0x0000000007C62000-memory.dmp

Filesize
1.3MB

Download
memory/2624-148-0x0000000007B20000-0x0000000007C62000-memory.dmp

Filesize
1.3MB

Download
memory/2624-140-0x00000000079D0000-0x0000000007B1F000-memory.dmp

Filesize
1.3MB

Download
memory/3548-147-0x0000000001440000-0x00000000014D0000-memory.dmp

Filesize
576KB

Download
memory/3548-144-0x0000000000170000-0x000000000017B000-memory.dmp

Filesize
44KB

Download
memory/3548-145-0x0000000000BB0000-0x0000000000BDC000-memory.dmp

Filesize
176KB

Download
memory/3548-146-0x0000000001630000-0x000000000197A000-memory.dmp

Filesize
3.3MB

Download
memory/3548-141-0x0000000000000000-mapping.dmp

Download
memory/3548-149-0x0000000000BB0000-0x0000000000BDC000-memory.dmp

Filesize
176KB

Download
memory/3568-153-0x0000000000000000-mapping.dmp

Download
memory/4616-133-0x0000000005460000-0x00000000054FC000-memory.dmp

Filesize
624KB

Download
memory/4616-134-0x00000000053D0000-0x00000000053DA000-memory.dmp

Filesize
40KB

Download
memory/4616-130-0x0000000000880000-0x0000000000924000-memory.dmp

Filesize
656KB

Download
memory/4616-132-0x0000000005320000-0x00000000053B2000-memory.dmp

Filesize
584KB

Download
memory/4616-131-0x00000000058D0000-0x0000000005E74000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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