formbook | 554c0655405441fc527ba1d0393c1bb6fb4b3d1925b50821dee1c7810f402c71

General

Target

fJvwDbVyiI8EOEk.exe
Size

575KB
MD5

78fd3b99caf88ac2ece715e72c0eaf56
SHA1

f581b9bfec6e14a7e8e0fcfb399686dc556b50eb
SHA256

554c0655405441fc527ba1d0393c1bb6fb4b3d1925b50821dee1c7810f402c71
SHA512

f20033fe26630195c18c6d7e5514edf1afd559215605de7ed2111e00f110e786ec175e2833de32fb28d539ff4421a41138941fed3cd209d9a090defd5d9842f0

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/5020-136-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/5020-138-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/2284-144-0x0000000000990000-0x00000000009BC000-memory.dmp	xloader
behavioral2/memory/2284-149-0x0000000000990000-0x00000000009BC000-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:

cmd.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	cmd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Y0C8FTBP8 = "C:\\Program Files (x86)\\Uapp\\ptd4whdb8pdx.exe"	cmd.exe

Blocklisted process makes network request 3 IoCs

Processes:

cmd.exe

flow pid process

48 2284 cmd.exe
50 2284 cmd.exe
52 2284 cmd.exe

flow	pid	process
48	2284	cmd.exe
50	2284	cmd.exe
52	2284	cmd.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:

fJvwDbVyiI8EOEk.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	fJvwDbVyiI8EOEk.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

Suspicious use of SetThreadContext 3 IoCs

Processes:

fJvwDbVyiI8EOEk.exefJvwDbVyiI8EOEk.execmd.exe

description	pid	process	target process
PID 3428 set thread context of 5020	3428	fJvwDbVyiI8EOEk.exe	fJvwDbVyiI8EOEk.exe
PID 5020 set thread context of 2996	5020	fJvwDbVyiI8EOEk.exe	Explorer.EXE
PID 2284 set thread context of 2996	2284	cmd.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

cmd.exe

description ioc process

File opened for modification C:\Program Files (x86)\Uapp\ptd4whdb8pdx.exe cmd.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Uapp\ptd4whdb8pdx.exe	cmd.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmd.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1809750270-3141839489-3074374771-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmd.exe

Suspicious behavior: EnumeratesProcesses 48 IoCs

Processes:

fJvwDbVyiI8EOEk.execmd.exe

pid	process
5020	fJvwDbVyiI8EOEk.exe
5020	fJvwDbVyiI8EOEk.exe
5020	fJvwDbVyiI8EOEk.exe
5020	fJvwDbVyiI8EOEk.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe
2284	cmd.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2996 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

fJvwDbVyiI8EOEk.execmd.exe

pid process

5020 fJvwDbVyiI8EOEk.exe
5020 fJvwDbVyiI8EOEk.exe
5020 fJvwDbVyiI8EOEk.exe
2284 cmd.exe
2284 cmd.exe
2284 cmd.exe
2284 cmd.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

fJvwDbVyiI8EOEk.execmd.exe

description pid process

Token: SeDebugPrivilege 5020 fJvwDbVyiI8EOEk.exe
Token: SeDebugPrivilege 2284 cmd.exe

pid	process
2996	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	5020	fJvwDbVyiI8EOEk.exe
Token: SeDebugPrivilege	2284	cmd.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

fJvwDbVyiI8EOEk.exeExplorer.EXEcmd.exe

description	pid	process	target process
PID 3428 wrote to memory of 5020	3428	fJvwDbVyiI8EOEk.exe	fJvwDbVyiI8EOEk.exe
PID 3428 wrote to memory of 5020	3428	fJvwDbVyiI8EOEk.exe	fJvwDbVyiI8EOEk.exe
PID 3428 wrote to memory of 5020	3428	fJvwDbVyiI8EOEk.exe	fJvwDbVyiI8EOEk.exe
PID 3428 wrote to memory of 5020	3428	fJvwDbVyiI8EOEk.exe	fJvwDbVyiI8EOEk.exe
PID 3428 wrote to memory of 5020	3428	fJvwDbVyiI8EOEk.exe	fJvwDbVyiI8EOEk.exe
PID 3428 wrote to memory of 5020	3428	fJvwDbVyiI8EOEk.exe	fJvwDbVyiI8EOEk.exe
PID 2996 wrote to memory of 2284	2996	Explorer.EXE	cmd.exe
PID 2996 wrote to memory of 2284	2996	Explorer.EXE	cmd.exe
PID 2996 wrote to memory of 2284	2996	Explorer.EXE	cmd.exe
PID 2284 wrote to memory of 1764	2284	cmd.exe	cmd.exe
PID 2284 wrote to memory of 1764	2284	cmd.exe	cmd.exe
PID 2284 wrote to memory of 1764	2284	cmd.exe	cmd.exe
PID 2284 wrote to memory of 2784	2284	cmd.exe	cmd.exe
PID 2284 wrote to memory of 2784	2284	cmd.exe	cmd.exe
PID 2284 wrote to memory of 2784	2284	cmd.exe	cmd.exe
PID 2284 wrote to memory of 2116	2284	cmd.exe	cmd.exe
PID 2284 wrote to memory of 2116	2284	cmd.exe	cmd.exe
PID 2284 wrote to memory of 2116	2284	cmd.exe	cmd.exe
PID 2284 wrote to memory of 3024	2284	cmd.exe	Firefox.exe
PID 2284 wrote to memory of 3024	2284	cmd.exe	Firefox.exe
PID 2284 wrote to memory of 3024	2284	cmd.exe	Firefox.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

cmd.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer cmd.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2996

C:\Users\Admin\AppData\Local\Temp\fJvwDbVyiI8EOEk.exe
"C:\Users\Admin\AppData\Local\Temp\fJvwDbVyiI8EOEk.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3428

C:\Users\Admin\AppData\Local\Temp\fJvwDbVyiI8EOEk.exe
"{path}"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:5020

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\SysWOW64\cmd.exe"
2⤵
- Adds policy Run key to start application
- Blocklisted process makes network request
- 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
- System policy modification
PID:2284

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\fJvwDbVyiI8EOEk.exe"
3⤵
PID:1764

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:2784

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:2116

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:3024

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

3

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

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/1764-145-0x0000000000000000-mapping.dmp

Download
memory/2116-153-0x0000000000000000-mapping.dmp

Download
memory/2284-149-0x0000000000990000-0x00000000009BC000-memory.dmp

Filesize
176KB

Download
memory/2284-147-0x0000000001500000-0x0000000001590000-memory.dmp

Filesize
576KB

Download
memory/2284-146-0x00000000016C0000-0x0000000001A0A000-memory.dmp

Filesize
3.3MB

Download
memory/2284-144-0x0000000000990000-0x00000000009BC000-memory.dmp

Filesize
176KB

Download
memory/2284-143-0x00000000009E0000-0x0000000000A3A000-memory.dmp

Filesize
360KB

Download
memory/2284-142-0x0000000000000000-mapping.dmp

Download
memory/2784-151-0x0000000000000000-mapping.dmp

Download
memory/2996-150-0x0000000002BE0000-0x0000000002CA6000-memory.dmp

Filesize
792KB

Download
memory/2996-148-0x0000000002BE0000-0x0000000002CA6000-memory.dmp

Filesize
792KB

Download
memory/2996-141-0x0000000007BC0000-0x0000000007D10000-memory.dmp

Filesize
1.3MB

Download
memory/3428-134-0x0000000003170000-0x000000000317A000-memory.dmp

Filesize
40KB

Download
memory/3428-130-0x0000000000A90000-0x0000000000B26000-memory.dmp

Filesize
600KB

Download
memory/3428-133-0x00000000055C0000-0x000000000565C000-memory.dmp

Filesize
624KB

Download
memory/3428-132-0x0000000005520000-0x00000000055B2000-memory.dmp

Filesize
584KB

Download
memory/3428-131-0x0000000005AD0000-0x0000000006074000-memory.dmp

Filesize
5.6MB

Download
memory/5020-139-0x00000000014B0000-0x00000000017FA000-memory.dmp

Filesize
3.3MB

Download
memory/5020-138-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/5020-136-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/5020-135-0x0000000000000000-mapping.dmp

Download
memory/5020-140-0x0000000001990000-0x00000000019A1000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads