formbook | 5749af95d51ba8e5d08b5724c8806a4e9fdd137ad4424ca2dd6f025a2662b421

General

Target

Memorandum.exe
Size

654KB
MD5

6ee086f9280e9b6dd55baeb5d247b8fc
SHA1

5492172488c392f929acb9b7cd775f940841eff0
SHA256

5749af95d51ba8e5d08b5724c8806a4e9fdd137ad4424ca2dd6f025a2662b421
SHA512

922be9587b623bae08f20eda65cc0ef7ce2960c3ebfee6a22709bf3976b0a1a553bcfd72fa7304b59bb1ba680d219537fe1c8bdd47c6833c039f3c09cd20b6e5

Score

10^/10

persistence spyware evasion trojan stealer formbook

Malware Config

Signatures

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Memorandum.execmstp.exeExplorer.EXE

description pid process

Token: SeDebugPrivilege 744 Memorandum.exe
Token: SeDebugPrivilege 1624 cmstp.exe
Token: SeShutdownPrivilege 1228 Explorer.EXE
Drops file in Program Files directory 1 IoCs

Processes:

cmstp.exe

description ioc process

File opened for modification C:\Program Files (x86)\Ovfylpl\helpcbc.exe cmstp.exe

description	pid	process
Token: SeDebugPrivilege	744	Memorandum.exe
Token: SeDebugPrivilege	1624	cmstp.exe
Token: SeShutdownPrivilege	1228	Explorer.EXE

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

Adds Run entry to policy 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\GBCPJFP0 = "C:\\Program Files (x86)\\Ovfylpl\\helpcbc.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-1-5-21-1131729243-447456001-3632642222-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.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
Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Suspicious behavior: MapViewOfSection 9 IoCs

Processes:

Memorandum.exeMemorandum.execmstp.exe

pid process

1544 Memorandum.exe
744 Memorandum.exe
744 Memorandum.exe
744 Memorandum.exe
744 Memorandum.exe
1624 cmstp.exe
1624 cmstp.exe
1624 cmstp.exe
1624 cmstp.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

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

Memorandum.exeExplorer.EXEcmstp.exe

description	pid	process	target process
PID 1544 wrote to memory of 744	1544	Memorandum.exe	Memorandum.exe
PID 1544 wrote to memory of 744	1544	Memorandum.exe	Memorandum.exe
PID 1544 wrote to memory of 744	1544	Memorandum.exe	Memorandum.exe
PID 1544 wrote to memory of 744	1544	Memorandum.exe	Memorandum.exe
PID 1228 wrote to memory of 1624	1228	Explorer.EXE	cmstp.exe
PID 1228 wrote to memory of 1624	1228	Explorer.EXE	cmstp.exe
PID 1228 wrote to memory of 1624	1228	Explorer.EXE	cmstp.exe
PID 1228 wrote to memory of 1624	1228	Explorer.EXE	cmstp.exe
PID 1228 wrote to memory of 1624	1228	Explorer.EXE	cmstp.exe
PID 1228 wrote to memory of 1624	1228	Explorer.EXE	cmstp.exe
PID 1228 wrote to memory of 1624	1228	Explorer.EXE	cmstp.exe
PID 1624 wrote to memory of 1036	1624	cmstp.exe	cmd.exe
PID 1624 wrote to memory of 1036	1624	cmstp.exe	cmd.exe
PID 1624 wrote to memory of 1036	1624	cmstp.exe	cmd.exe
PID 1624 wrote to memory of 1036	1624	cmstp.exe	cmd.exe
PID 1624 wrote to memory of 1988	1624	cmstp.exe	Firefox.exe
PID 1624 wrote to memory of 1988	1624	cmstp.exe	Firefox.exe
PID 1624 wrote to memory of 1988	1624	cmstp.exe	Firefox.exe
PID 1624 wrote to memory of 1988	1624	cmstp.exe	Firefox.exe
PID 1624 wrote to memory of 1988	1624	cmstp.exe	Firefox.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

Memorandum.exeMemorandum.execmstp.exe

description	pid	process	target process
PID 1544 set thread context of 744	1544	Memorandum.exe	Memorandum.exe
PID 744 set thread context of 1228	744	Memorandum.exe	Explorer.EXE
PID 744 set thread context of 1228	744	Memorandum.exe	Explorer.EXE
PID 1624 set thread context of 1228	1624	cmstp.exe	Explorer.EXE

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1036 cmd.exe
Suspicious use of FindShellTrayWindow 5 IoCs

Processes:

Explorer.EXE

pid process

1228 Explorer.EXE
1228 Explorer.EXE
1228 Explorer.EXE
1228 Explorer.EXE
1228 Explorer.EXE

pid	process
1036	cmd.exe

pid	process
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 30 IoCs

Processes:

Memorandum.exeMemorandum.execmstp.exe

pid	process
1544	Memorandum.exe
744	Memorandum.exe
744	Memorandum.exe
744	Memorandum.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe
1624	cmstp.exe

Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1228 Explorer.EXE
1228 Explorer.EXE
1228 Explorer.EXE
1228 Explorer.EXE
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
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE

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

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Checks whether UAC is enabled
PID:1228

C:\Users\Admin\AppData\Local\Temp\Memorandum.exe
"C:\Users\Admin\AppData\Local\Temp\Memorandum.exe"
2⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
PID:1544

C:\Users\Admin\AppData\Local\Temp\Memorandum.exe
"C:\Users\Admin\AppData\Local\Temp\Memorandum.exe"
3⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
PID:744

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:792

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:272

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:752

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:556

C:\Windows\SysWOW64\autofmt.exe
"C:\Windows\SysWOW64\autofmt.exe"
2⤵
PID:1108

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Drops file in Program Files directory
- Adds Run entry to policy start application
- Modifies Internet Explorer settings
- Suspicious behavior: MapViewOfSection
- System policy modification
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
PID:1624

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\Memorandum.exe"
3⤵
- Deletes itself
PID:1036

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1988

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\79OQ87VU\79Ologim.jpeg

Download Submit
C:\Users\Admin\AppData\Roaming\79OQ87VU\79Ologrf.ini

Download Submit
C:\Users\Admin\AppData\Roaming\79OQ87VU\79Ologri.ini

Download Submit
C:\Users\Admin\AppData\Roaming\79OQ87VU\79Ologrv.ini

Download Submit
memory/744-1-0x000000000041E350-mapping.dmp

Download
memory/744-0-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1036-5-0x0000000000000000-mapping.dmp

Download
memory/1228-2-0x0000000007810000-0x000000000790D000-memory.dmp

Filesize
1012KB

Download
memory/1624-4-0x0000000000390000-0x00000000003A8000-memory.dmp

Filesize
96KB

Download
memory/1624-9-0x0000000003B80000-0x0000000003CBB000-memory.dmp

Filesize
1.2MB

Download
memory/1624-8-0x0000000074BB0000-0x0000000074CCD000-memory.dmp

Filesize
1.1MB

Download
memory/1624-7-0x00000000750B0000-0x00000000750BC000-memory.dmp

Filesize
48KB

Download
memory/1624-6-0x00000000007F0000-0x00000000008AC000-memory.dmp

Filesize
752KB

Download
memory/1624-3-0x0000000000000000-mapping.dmp

Download
memory/1988-10-0x0000000000000000-mapping.dmp

Download
memory/1988-11-0x000000013FE20000-0x000000013FEB3000-memory.dmp

Filesize
588KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads