formbook | ab12a111885480b3518449ff615d118b0ba908e4f3f0179c8da797c7c815cbfe

General

Target

Remittance advice.exe
Size

832KB
MD5

6b72bf98756a106ce4ffb0d7ef1be954
SHA1

2153b926fbb23eac4af1235f3dc3ff867cbaf174
SHA256

ab12a111885480b3518449ff615d118b0ba908e4f3f0179c8da797c7c815cbfe
SHA512

34e79cbde4f94b779af05677e04e8276bb303d2270c545e43a7ab31a54ab5fa4bafb875fa51c9e24d2de714b4e156bdf062df502d3d86ed2c6e61a0efe7d5e13

Score

10^/10

spyware evasion trojan stealer formbook persistence

Malware Config

Signatures

Suspicious behavior: EnumeratesProcesses 29 IoCs

Processes:

Remittance advice.exeRemittance advice.exehelp.exe

pid	process
1032	Remittance advice.exe
1052	Remittance advice.exe
1052	Remittance advice.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe

Drops file in Program Files directory 1 IoCs

Processes:

help.exe

description ioc process

File opened for modification C:\Program Files (x86)\Nsdv\gdirfgx.exe help.exe
System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

help.exe

description ioc process

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

description	ioc	process
File opened for modification	C:\Program Files (x86)\Nsdv\gdirfgx.exe	help.exe

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

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

Remittance advice.exeRemittance advice.exehelp.exe

pid	process
1032	Remittance advice.exe
1052	Remittance advice.exe
1052	Remittance advice.exe
1052	Remittance advice.exe
1492	help.exe
1492	help.exe
1492	help.exe
1492	help.exe

Suspicious use of FindShellTrayWindow 5 IoCs

Processes:

Explorer.EXE

pid process

1320 Explorer.EXE
1320 Explorer.EXE
1320 Explorer.EXE
1320 Explorer.EXE
1320 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1320 Explorer.EXE
1320 Explorer.EXE
1320 Explorer.EXE
1320 Explorer.EXE
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

Explorer.EXE

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA Explorer.EXE

pid	process
1320	Explorer.EXE
1320	Explorer.EXE
1320	Explorer.EXE
1320	Explorer.EXE
1320	Explorer.EXE

pid	process
1320	Explorer.EXE
1320	Explorer.EXE
1320	Explorer.EXE
1320	Explorer.EXE

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Explorer.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

help.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-910373003-3952921535-3480519689-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	help.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

Remittance advice.exeExplorer.EXEhelp.exe

description	pid	process	target process
PID 1032 wrote to memory of 732	1032	Remittance advice.exe	notepad.exe
PID 1032 wrote to memory of 732	1032	Remittance advice.exe	notepad.exe
PID 1032 wrote to memory of 732	1032	Remittance advice.exe	notepad.exe
PID 1032 wrote to memory of 732	1032	Remittance advice.exe	notepad.exe
PID 1032 wrote to memory of 732	1032	Remittance advice.exe	notepad.exe
PID 1032 wrote to memory of 732	1032	Remittance advice.exe	notepad.exe
PID 1032 wrote to memory of 1052	1032	Remittance advice.exe	Remittance advice.exe
PID 1032 wrote to memory of 1052	1032	Remittance advice.exe	Remittance advice.exe
PID 1032 wrote to memory of 1052	1032	Remittance advice.exe	Remittance advice.exe
PID 1032 wrote to memory of 1052	1032	Remittance advice.exe	Remittance advice.exe
PID 1320 wrote to memory of 1492	1320	Explorer.EXE	help.exe
PID 1320 wrote to memory of 1492	1320	Explorer.EXE	help.exe
PID 1320 wrote to memory of 1492	1320	Explorer.EXE	help.exe
PID 1320 wrote to memory of 1492	1320	Explorer.EXE	help.exe
PID 1492 wrote to memory of 1348	1492	help.exe	cmd.exe
PID 1492 wrote to memory of 1348	1492	help.exe	cmd.exe
PID 1492 wrote to memory of 1348	1492	help.exe	cmd.exe
PID 1492 wrote to memory of 1348	1492	help.exe	cmd.exe
PID 1492 wrote to memory of 560	1492	help.exe	Firefox.exe
PID 1492 wrote to memory of 560	1492	help.exe	Firefox.exe
PID 1492 wrote to memory of 560	1492	help.exe	Firefox.exe
PID 1492 wrote to memory of 560	1492	help.exe	Firefox.exe
PID 1492 wrote to memory of 560	1492	help.exe	Firefox.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1348 cmd.exe
Drops startup file 1 IoCs

Processes:

notepad.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Remittance advice.vbs notepad.exe
Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

pid	process
1348	cmd.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Remittance advice.vbs	notepad.exe

Adds Run entry to policy start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

help.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	help.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\HTODEFSHWLH0 = "C:\\Program Files (x86)\\Nsdv\\gdirfgx.exe"	help.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

Remittance advice.exeRemittance advice.exehelp.exe

description	pid	process	target process
PID 1032 set thread context of 1052	1032	Remittance advice.exe	Remittance advice.exe
PID 1052 set thread context of 1320	1052	Remittance advice.exe	Explorer.EXE
PID 1492 set thread context of 1320	1492	help.exe	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Remittance advice.exehelp.exe

description pid process

Token: SeDebugPrivilege 1052 Remittance advice.exe
Token: SeDebugPrivilege 1492 help.exe

description	pid	process
Token: SeDebugPrivilege	1052	Remittance advice.exe
Token: SeDebugPrivilege	1492	help.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Checks whether UAC is enabled
- Suspicious use of WriteProcessMemory
PID:1320

C:\Users\Admin\AppData\Local\Temp\Remittance advice.exe
"C:\Users\Admin\AppData\Local\Temp\Remittance advice.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:1032

C:\Windows\SysWOW64\notepad.exe
"C:\Windows\system32\notepad.exe"
3⤵
- Drops startup file
PID:732

C:\Users\Admin\AppData\Local\Temp\Remittance advice.exe
"C:\Users\Admin\AppData\Local\Temp\Remittance advice.exe"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
PID:1052

C:\Windows\SysWOW64\help.exe
"C:\Windows\SysWOW64\help.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Drops file in Program Files directory
- System policy modification
- Suspicious behavior: MapViewOfSection
- Modifies Internet Explorer settings
- Suspicious use of WriteProcessMemory
- Adds Run entry to policy start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
PID:1492

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Remittance advice.exe"
3⤵
- Deletes itself
PID:1348

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:560

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

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\Roaming\5L3Q2S75\5L3logim.jpeg

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C:\Users\Admin\AppData\Roaming\5L3Q2S75\5L3logrf.ini

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C:\Users\Admin\AppData\Roaming\5L3Q2S75\5L3logri.ini

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C:\Users\Admin\AppData\Roaming\5L3Q2S75\5L3logrv.ini

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memory/560-9-0x0000000000000000-mapping.dmp

Download
memory/560-10-0x000000013FB80000-0x000000013FC13000-memory.dmp

Filesize
588KB

Download
memory/732-1-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/732-0-0x0000000000000000-mapping.dmp

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memory/1052-3-0x000000000041E290-mapping.dmp

Download
memory/1052-2-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1348-6-0x0000000000000000-mapping.dmp

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memory/1492-8-0x00000000032C0000-0x000000000338E000-memory.dmp

Filesize
824KB

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memory/1492-7-0x0000000000730000-0x0000000000836000-memory.dmp

Filesize
1.0MB

Download
memory/1492-5-0x00000000002B0000-0x00000000002B6000-memory.dmp

Filesize
24KB

Download
memory/1492-4-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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