formbook | 985bff9f5d8470baf0a3c5520eae6e8bb87a9761bd6c7ce41855c5c8cc0a58bc

General

Target

Invoice#5800371 pdf.exe
Size

837KB
MD5

328eaa1e53fdeba2a8d99f4a5f0385dd
SHA1

9da77711434bfe5eb4f26365513c7663da5e9885
SHA256

985bff9f5d8470baf0a3c5520eae6e8bb87a9761bd6c7ce41855c5c8cc0a58bc
SHA512

475be1e25abb8697952b5014ebfa6d5e26eb3f0d312739771f4f0f91819f55b3620dbeb76c3bb47a7febf17f8588232d4cecb25cc130f7437d1d810dd8b0586d

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

Xloader Payload 5 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/364-63-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral1/memory/364-64-0x00000000004202C0-mapping.dmp	xloader
behavioral1/memory/364-66-0x0000000000400000-0x000000000042D000-memory.dmp	xloader
behavioral1/memory/1008-73-0x0000000000070000-0x000000000009D000-memory.dmp	xloader
behavioral1/memory/1008-77-0x0000000000070000-0x000000000009D000-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:

cscript.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	cscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\HJSDOL18N = "C:\\Program Files (x86)\\Nhx58\\configpbc.exe"	cscript.exe

Blocklisted process makes network request 1 IoCs

Processes:

cscript.exe

flow pid process

8 1008 cscript.exe

flow	pid	process
8	1008	cscript.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:

Invoice#5800371 pdf.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Control Panel\International\Geo\Nation	Invoice#5800371 pdf.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

880 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

cscript.exe

pid process

1008 cscript.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

pid	process
880	cmd.exe

pid	process
1008	cscript.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Invoice#5800371 pdf.exeInvoice#5800371 pdf.execscript.exe

description	pid	process	target process
PID 1968 set thread context of 364	1968	Invoice#5800371 pdf.exe	Invoice#5800371 pdf.exe
PID 364 set thread context of 1188	364	Invoice#5800371 pdf.exe	Explorer.EXE
PID 1008 set thread context of 1188	1008	cscript.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

cscript.exe

description ioc process

File opened for modification C:\Program Files (x86)\Nhx58\configpbc.exe cscript.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Program Files (x86)\Nhx58\configpbc.exe	cscript.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cscript.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1083475884-596052423-1669053738-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cscript.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

Processes:

Invoice#5800371 pdf.execscript.exe

pid	process
364	Invoice#5800371 pdf.exe
364	Invoice#5800371 pdf.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe
1008	cscript.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

Invoice#5800371 pdf.execscript.exe

pid process

364 Invoice#5800371 pdf.exe
364 Invoice#5800371 pdf.exe
364 Invoice#5800371 pdf.exe
1008 cscript.exe
1008 cscript.exe
1008 cscript.exe
1008 cscript.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Invoice#5800371 pdf.execscript.exe

description pid process

Token: SeDebugPrivilege 364 Invoice#5800371 pdf.exe
Token: SeDebugPrivilege 1008 cscript.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1188 Explorer.EXE
1188 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1188 Explorer.EXE
1188 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	364	Invoice#5800371 pdf.exe
Token: SeDebugPrivilege	1008	cscript.exe

pid	process
1188	Explorer.EXE
1188	Explorer.EXE

pid	process
1188	Explorer.EXE
1188	Explorer.EXE

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

Invoice#5800371 pdf.exeExplorer.EXEcscript.exe

description	pid	process	target process
PID 1968 wrote to memory of 364	1968	Invoice#5800371 pdf.exe	Invoice#5800371 pdf.exe
PID 1968 wrote to memory of 364	1968	Invoice#5800371 pdf.exe	Invoice#5800371 pdf.exe
PID 1968 wrote to memory of 364	1968	Invoice#5800371 pdf.exe	Invoice#5800371 pdf.exe
PID 1968 wrote to memory of 364	1968	Invoice#5800371 pdf.exe	Invoice#5800371 pdf.exe
PID 1968 wrote to memory of 364	1968	Invoice#5800371 pdf.exe	Invoice#5800371 pdf.exe
PID 1968 wrote to memory of 364	1968	Invoice#5800371 pdf.exe	Invoice#5800371 pdf.exe
PID 1968 wrote to memory of 364	1968	Invoice#5800371 pdf.exe	Invoice#5800371 pdf.exe
PID 1188 wrote to memory of 1008	1188	Explorer.EXE	cscript.exe
PID 1188 wrote to memory of 1008	1188	Explorer.EXE	cscript.exe
PID 1188 wrote to memory of 1008	1188	Explorer.EXE	cscript.exe
PID 1188 wrote to memory of 1008	1188	Explorer.EXE	cscript.exe
PID 1008 wrote to memory of 880	1008	cscript.exe	cmd.exe
PID 1008 wrote to memory of 880	1008	cscript.exe	cmd.exe
PID 1008 wrote to memory of 880	1008	cscript.exe	cmd.exe
PID 1008 wrote to memory of 880	1008	cscript.exe	cmd.exe
PID 1008 wrote to memory of 1000	1008	cscript.exe	Firefox.exe
PID 1008 wrote to memory of 1000	1008	cscript.exe	Firefox.exe
PID 1008 wrote to memory of 1000	1008	cscript.exe	Firefox.exe
PID 1008 wrote to memory of 1000	1008	cscript.exe	Firefox.exe
PID 1008 wrote to memory of 1000	1008	cscript.exe	Firefox.exe
PID 1008 wrote to memory of 536	1008	cscript.exe	cmd.exe
PID 1008 wrote to memory of 536	1008	cscript.exe	cmd.exe
PID 1008 wrote to memory of 536	1008	cscript.exe	cmd.exe
PID 1008 wrote to memory of 536	1008	cscript.exe	cmd.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

cscript.exe

description ioc process

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

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1188

C:\Users\Admin\AppData\Local\Temp\Invoice#5800371 pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Invoice#5800371 pdf.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1968

C:\Users\Admin\AppData\Local\Temp\Invoice#5800371 pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Invoice#5800371 pdf.exe"
3⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:364

C:\Windows\SysWOW64\cscript.exe
"C:\Windows\SysWOW64\cscript.exe"
2⤵
- Adds policy Run key to start application
- Blocklisted process makes network request
- Loads dropped DLL
- 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:1008

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Invoice#5800371 pdf.exe"
3⤵
- Deletes itself
PID:880

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1000

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:536

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

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
\Users\Admin\AppData\Local\Temp\sqlite3.dll
Filesize
635KB

MD5
ee68b052a08fec0f574f2dae2003df27

SHA1
4fe217c85e91d3ae7c46acbc03b9ca6565a29a92

SHA256
cf5301c28275b1f04d5ebaecc7fc4ebd9ebc970e1c2c9512f5380e263bf9ddfd

SHA512
d39c9560380c8f8c0a8e15dd3c577bad6d1ffc479afb9dc81e67bc2510f61e8c9fca723c2b931065738b1f554bab73ff934e65fcf4334df1e1539ebd566dfab2

Download Submit
memory/364-68-0x0000000000200000-0x0000000000211000-memory.dmp

Filesize
68KB

Download
memory/364-64-0x00000000004202C0-mapping.dmp

Download
memory/364-67-0x0000000000960000-0x0000000000C63000-memory.dmp

Filesize
3.0MB

Download
memory/364-66-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/364-60-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/364-61-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/364-63-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/536-81-0x0000000000000000-mapping.dmp

Download
memory/880-71-0x0000000000000000-mapping.dmp

Download
memory/1008-73-0x0000000000070000-0x000000000009D000-memory.dmp

Filesize
180KB

Download
memory/1008-77-0x0000000000070000-0x000000000009D000-memory.dmp

Filesize
180KB

Download
memory/1008-74-0x0000000000B70000-0x0000000000E73000-memory.dmp

Filesize
3.0MB

Download
memory/1008-72-0x0000000000FF0000-0x0000000001012000-memory.dmp

Filesize
136KB

Download
memory/1008-75-0x00000000009E0000-0x0000000000A70000-memory.dmp

Filesize
576KB

Download
memory/1008-70-0x0000000000000000-mapping.dmp

Download
memory/1188-76-0x0000000004BF0000-0x0000000004CEA000-memory.dmp

Filesize
1000KB

Download
memory/1188-78-0x0000000004BF0000-0x0000000004CEA000-memory.dmp

Filesize
1000KB

Download
memory/1188-69-0x0000000004320000-0x00000000043EB000-memory.dmp

Filesize
812KB

Download
memory/1968-55-0x0000000075EF1000-0x0000000075EF3000-memory.dmp

Filesize
8KB

Download
memory/1968-58-0x0000000007EF0000-0x0000000007F66000-memory.dmp

Filesize
472KB

Download
memory/1968-57-0x0000000000440000-0x000000000044E000-memory.dmp

Filesize
56KB

Download
memory/1968-59-0x0000000002200000-0x0000000002232000-memory.dmp

Filesize
200KB

Download
memory/1968-56-0x00000000003D0000-0x00000000003F0000-memory.dmp

Filesize
128KB

Download
memory/1968-54-0x0000000000880000-0x0000000000958000-memory.dmp

Filesize
864KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads