formbook | 2ec4c1f1ffef7845a945dc1ad00d3e3f866a719c2d876847f1d2956fdf0197b7

General

Target

tmp.exe
Size

832KB
MD5

9ceab445695962b97fc520ca612c9d7d
SHA1

86a4e71153fe818d34ac165923819f1277c115d9
SHA256

2ec4c1f1ffef7845a945dc1ad00d3e3f866a719c2d876847f1d2956fdf0197b7
SHA512

297035591f3690ff7327d49b6bb25523169427b02c9011654f7f904b9541573754342c0615e65971c04588ebb2a6e1fe42c0e2fd37ed6b1ae669fb78809cae74

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
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/3888-141-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral2/memory/3888-143-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral2/memory/2064-149-0x0000000000920000-0x000000000094D000-memory.dmp	xloader
behavioral2/memory/2064-154-0x0000000000920000-0x000000000094D000-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:

chkdsk.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	chkdsk.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\P6QLW4BPTPX = "C:\\Program Files (x86)\\W9r3dufw0\\userqfqlnv.exe"	chkdsk.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.exechkdsk.exe

description	pid	process	target process
PID 4876 set thread context of 3888	4876	tmp.exe	tmp.exe
PID 3888 set thread context of 8	3888	tmp.exe	Explorer.EXE
PID 2064 set thread context of 8	2064	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)\W9r3dufw0\userqfqlnv.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)\W9r3dufw0\userqfqlnv.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-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 44 IoCs

Processes:

tmp.exetmp.exechkdsk.exe

pid	process
4876	tmp.exe
4876	tmp.exe
4876	tmp.exe
4876	tmp.exe
4876	tmp.exe
4876	tmp.exe
4876	tmp.exe
4876	tmp.exe
3888	tmp.exe
3888	tmp.exe
3888	tmp.exe
3888	tmp.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

8 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

tmp.exechkdsk.exe

pid process

3888 tmp.exe
3888 tmp.exe
3888 tmp.exe
2064 chkdsk.exe
2064 chkdsk.exe
2064 chkdsk.exe
2064 chkdsk.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

tmp.exetmp.exechkdsk.exe

description pid process

Token: SeDebugPrivilege 4876 tmp.exe
Token: SeDebugPrivilege 3888 tmp.exe
Token: SeDebugPrivilege 2064 chkdsk.exe

pid	process
8	Explorer.EXE

pid	process
3888	tmp.exe
3888	tmp.exe
3888	tmp.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe
2064	chkdsk.exe

description	pid	process
Token: SeDebugPrivilege	4876	tmp.exe
Token: SeDebugPrivilege	3888	tmp.exe
Token: SeDebugPrivilege	2064	chkdsk.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

tmp.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 4876 wrote to memory of 228	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 228	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 228	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 1176	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 1176	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 1176	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 1188	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 1188	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 1188	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 4668	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 4668	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 4668	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 3888	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 3888	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 3888	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 3888	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 3888	4876	tmp.exe	tmp.exe
PID 4876 wrote to memory of 3888	4876	tmp.exe	tmp.exe
PID 8 wrote to memory of 2064	8	Explorer.EXE	chkdsk.exe
PID 8 wrote to memory of 2064	8	Explorer.EXE	chkdsk.exe
PID 8 wrote to memory of 2064	8	Explorer.EXE	chkdsk.exe
PID 2064 wrote to memory of 1628	2064	chkdsk.exe	cmd.exe
PID 2064 wrote to memory of 1628	2064	chkdsk.exe	cmd.exe
PID 2064 wrote to memory of 1628	2064	chkdsk.exe	cmd.exe
PID 2064 wrote to memory of 2772	2064	chkdsk.exe	cmd.exe
PID 2064 wrote to memory of 2772	2064	chkdsk.exe	cmd.exe
PID 2064 wrote to memory of 2772	2064	chkdsk.exe	cmd.exe
PID 2064 wrote to memory of 1504	2064	chkdsk.exe	cmd.exe
PID 2064 wrote to memory of 1504	2064	chkdsk.exe	cmd.exe
PID 2064 wrote to memory of 1504	2064	chkdsk.exe	cmd.exe
PID 2064 wrote to memory of 2280	2064	chkdsk.exe	Firefox.exe
PID 2064 wrote to memory of 2280	2064	chkdsk.exe	Firefox.exe
PID 2064 wrote to memory of 2280	2064	chkdsk.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:8

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:4876

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
PID:228

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
PID:1176

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
PID:1188

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
PID:4668

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:3888

C:\Windows\SysWOW64\autochk.exe
"C:\Windows\SysWOW64\autochk.exe"
2⤵
PID:1820

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Adds policy 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:2064

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
3⤵
PID:1628

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:2772

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:1504

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:2280

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

Credentials in Files

1

T1081

Discovery

Query Registry

2

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

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

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

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memory/8-146-0x0000000007D90000-0x0000000007EE6000-memory.dmp

Filesize
1.3MB

Download
memory/8-155-0x0000000002C10000-0x0000000002CDC000-memory.dmp

Filesize
816KB

Download
memory/8-153-0x0000000002C10000-0x0000000002CDC000-memory.dmp

Filesize
816KB

Download
memory/228-136-0x0000000000000000-mapping.dmp

Download
memory/1176-137-0x0000000000000000-mapping.dmp

Download
memory/1188-138-0x0000000000000000-mapping.dmp

Download
memory/1504-158-0x0000000000000000-mapping.dmp

Download
memory/1628-150-0x0000000000000000-mapping.dmp

Download
memory/2064-152-0x0000000001250000-0x00000000012E0000-memory.dmp

Filesize
576KB

Download
memory/2064-149-0x0000000000920000-0x000000000094D000-memory.dmp

Filesize
180KB

Download
memory/2064-154-0x0000000000920000-0x000000000094D000-memory.dmp

Filesize
180KB

Download
memory/2064-151-0x0000000001400000-0x000000000174A000-memory.dmp

Filesize
3.3MB

Download
memory/2064-148-0x00000000008F0000-0x00000000008FA000-memory.dmp

Filesize
40KB

Download
memory/2064-147-0x0000000000000000-mapping.dmp

Download
memory/2772-156-0x0000000000000000-mapping.dmp

Download
memory/3888-140-0x0000000000000000-mapping.dmp

Download
memory/3888-141-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/3888-145-0x00000000018A0000-0x00000000018B1000-memory.dmp

Filesize
68KB

Download
memory/3888-144-0x00000000013F0000-0x000000000173A000-memory.dmp

Filesize
3.3MB

Download
memory/3888-143-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/4668-139-0x0000000000000000-mapping.dmp

Download
memory/4876-130-0x0000000000D80000-0x0000000000E56000-memory.dmp

Filesize
856KB

Download
memory/4876-135-0x0000000009670000-0x00000000096D6000-memory.dmp

Filesize
408KB

Download
memory/4876-134-0x00000000095D0000-0x000000000966C000-memory.dmp

Filesize
624KB

Download
memory/4876-133-0x00000000057F0000-0x00000000057FA000-memory.dmp

Filesize
40KB

Download
memory/4876-132-0x0000000005880000-0x0000000005912000-memory.dmp

Filesize
584KB

Download
memory/4876-131-0x0000000005E30000-0x00000000063D4000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads