formbook | 9696d3ec13f85ada39b140ae0096e765db0ff630f351ffa1e96484f6a4f2f030

General

Target

tmp.exe
Size

612KB
MD5

0229fa24ef686c20e6d50c5a75aa8c27
SHA1

07c4fa01089a3275f88ce4d7fa404040ac638c35
SHA256

9696d3ec13f85ada39b140ae0096e765db0ff630f351ffa1e96484f6a4f2f030
SHA512

bae11a5fa3b52c577f815dbda2aefca1a16475fd694cd62684dd31b6890731f14f1d1a3d147f5a159907b4e7e7dcc2cf5dff80b96a5e2076aa4c5cf7c2b56ca3

Score

10^/10

formbook xloader iewb loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

iewb

Decoy

n8FLlgIlb1rSEg5hJ9xMbw4hcmR38Q==

5vIAIY+pt81OtWs+FdIEdk7Y

LHIKc+oWGIQUUlfAAtEEdk7Y

ePM/cX2jvHrS

5hvPEw22+fdvmJz3C8FIVq0=

mb9EeX2jvHrS

Dx2zIYNvfjo8VUo5

6jVPnyJekv2RAc4gLKNwEqQ=

KWatHyjdE5Gj1Ng=

t9lk70gzUAZty4qjbVjF

6eUBeFPzKBWT125BFNIEdk7Y

dZUXOIyqTJGj1Ng=

iL3TVh2Jl5QVStnzxcAhIL8=

J1prtyklUfZGR/xDD71IbkWRd2yx

s9FgCOBRW9bU0Y6jbVjF

RYCbQDzcFBhcylgu

Fl0BV/8RJm6F9QRg8LXXTLo=

0dhumHzrCCZ3wdQg7nFF1AlL6Tk=

xvL+iL6wwX+/wH9K4lbZ/A==

N0lVceIFD5Gj1Ng=

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
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata

Xloader Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3200-137-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3200-139-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/4460-145-0x0000000000710000-0x000000000073C000-memory.dmp	xloader
behavioral2/memory/4460-150-0x0000000000710000-0x000000000073C000-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:

cmstp.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	cmstp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\UZ7TO6DH5N = "C:\\Program Files (x86)\\Kp0hda\\rvtpsvnbu0.exe"	cmstp.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:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation tmp.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-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	tmp.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

tmp.exetmp.execmstp.exe

description	pid	process	target process
PID 4208 set thread context of 3200	4208	tmp.exe	tmp.exe
PID 3200 set thread context of 2896	3200	tmp.exe	Explorer.EXE
PID 4460 set thread context of 2896	4460	cmstp.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

cmstp.exe

description ioc process

File opened for modification C:\Program Files (x86)\Kp0hda\rvtpsvnbu0.exe cmstp.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Kp0hda\rvtpsvnbu0.exe	cmstp.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

Processes:

tmp.execmstp.exe

pid	process
3200	tmp.exe
3200	tmp.exe
3200	tmp.exe
3200	tmp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe
4460	cmstp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2896 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

tmp.execmstp.exe

pid process

3200 tmp.exe
3200 tmp.exe
3200 tmp.exe
4460 cmstp.exe
4460 cmstp.exe
4460 cmstp.exe
4460 cmstp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.execmstp.exe

description pid process

Token: SeDebugPrivilege 3200 tmp.exe
Token: SeDebugPrivilege 4460 cmstp.exe

pid	process
2896	Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	3200	tmp.exe
Token: SeDebugPrivilege	4460	cmstp.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

tmp.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 4208 wrote to memory of 3200	4208	tmp.exe	tmp.exe
PID 4208 wrote to memory of 3200	4208	tmp.exe	tmp.exe
PID 4208 wrote to memory of 3200	4208	tmp.exe	tmp.exe
PID 4208 wrote to memory of 3200	4208	tmp.exe	tmp.exe
PID 4208 wrote to memory of 3200	4208	tmp.exe	tmp.exe
PID 4208 wrote to memory of 3200	4208	tmp.exe	tmp.exe
PID 2896 wrote to memory of 4460	2896	Explorer.EXE	cmstp.exe
PID 2896 wrote to memory of 4460	2896	Explorer.EXE	cmstp.exe
PID 2896 wrote to memory of 4460	2896	Explorer.EXE	cmstp.exe
PID 4460 wrote to memory of 3820	4460	cmstp.exe	cmd.exe
PID 4460 wrote to memory of 3820	4460	cmstp.exe	cmd.exe
PID 4460 wrote to memory of 3820	4460	cmstp.exe	cmd.exe
PID 4460 wrote to memory of 2652	4460	cmstp.exe	cmd.exe
PID 4460 wrote to memory of 2652	4460	cmstp.exe	cmd.exe
PID 4460 wrote to memory of 2652	4460	cmstp.exe	cmd.exe
PID 4460 wrote to memory of 4912	4460	cmstp.exe	cmd.exe
PID 4460 wrote to memory of 4912	4460	cmstp.exe	cmd.exe
PID 4460 wrote to memory of 4912	4460	cmstp.exe	cmd.exe
PID 4460 wrote to memory of 1056	4460	cmstp.exe	Firefox.exe
PID 4460 wrote to memory of 1056	4460	cmstp.exe	Firefox.exe
PID 4460 wrote to memory of 1056	4460	cmstp.exe	Firefox.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

cmstp.exe

description ioc process

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

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2896

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4208

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:3200

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.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
- System policy modification
PID:4460

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
PID:3820

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:2652

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:4912

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1056

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/2652-152-0x0000000000000000-mapping.dmp

Download
memory/2896-142-0x00000000080D0000-0x00000000081EC000-memory.dmp

Filesize
1.1MB

Download
memory/2896-151-0x0000000002AB0000-0x0000000002B8F000-memory.dmp

Filesize
892KB

Download
memory/2896-149-0x0000000002AB0000-0x0000000002B8F000-memory.dmp

Filesize
892KB

Download
memory/3200-136-0x0000000000000000-mapping.dmp

Download
memory/3200-139-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3200-140-0x00000000016E0000-0x0000000001A2A000-memory.dmp

Filesize
3.3MB

Download
memory/3200-141-0x0000000001260000-0x0000000001271000-memory.dmp

Filesize
68KB

Download
memory/3200-137-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/3820-146-0x0000000000000000-mapping.dmp

Download
memory/4208-130-0x0000000000AE0000-0x0000000000B7E000-memory.dmp

Filesize
632KB

Download
memory/4208-135-0x00000000010E0000-0x0000000001146000-memory.dmp

Filesize
408KB

Download
memory/4208-134-0x0000000009430000-0x00000000094CC000-memory.dmp

Filesize
624KB

Download
memory/4208-133-0x00000000055D0000-0x00000000055DA000-memory.dmp

Filesize
40KB

Download
memory/4208-132-0x0000000005510000-0x00000000055A2000-memory.dmp

Filesize
584KB

Download
memory/4208-131-0x0000000005BA0000-0x0000000006144000-memory.dmp

Filesize
5.6MB

Download
memory/4460-145-0x0000000000710000-0x000000000073C000-memory.dmp

Filesize
176KB

Download
memory/4460-144-0x00000000008D0000-0x00000000008E6000-memory.dmp

Filesize
88KB

Download
memory/4460-143-0x0000000000000000-mapping.dmp

Download
memory/4460-147-0x00000000029C0000-0x0000000002D0A000-memory.dmp

Filesize
3.3MB

Download
memory/4460-148-0x0000000002790000-0x0000000002820000-memory.dmp

Filesize
576KB

Download
memory/4460-150-0x0000000000710000-0x000000000073C000-memory.dmp

Filesize
176KB

Download
memory/4912-154-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads