formbook | 0cd1ca47d2e04de65562e1ba4d8ce4545ee486999f8f0eb7adc880c7fb7fc9b8

General

Target

Confirmation voucher.exe
Size

1.1MB
MD5

7c239ebd95edce558af5ab4ba444a20e
SHA1

72b95da770016af3be66101db42c191d60685d7f
SHA256

0cd1ca47d2e04de65562e1ba4d8ce4545ee486999f8f0eb7adc880c7fb7fc9b8
SHA512

bf4ad36a62ef6583dc82674767fcadffa23d5667d664e08c36cc3e05a3368ac269463dfd446be5f00db07e2918c8705190398a97a4b538ab4c61705262d5542d

Score

10^/10

rat spyware trojan stealer formbook persistence

Malware Config

Signatures

Executes dropped EXE 3 IoCs

Processes:

okxjgnm.pifRegSvcs.exeRegSvcs.exe

pid process

1692 okxjgnm.pif
628 RegSvcs.exe
552 RegSvcs.exe

pid	process
1692	okxjgnm.pif
628	RegSvcs.exe
552	RegSvcs.exe

Suspicious use of AdjustPrivilegeToken 16 IoCs

Processes:

RegSvcs.exeExplorer.EXEcmstp.exe

description	pid	process
Token: SeDebugPrivilege	628	RegSvcs.exe
Token: SeShutdownPrivilege	3000	Explorer.EXE
Token: SeCreatePagefilePrivilege	3000	Explorer.EXE
Token: SeShutdownPrivilege	3000	Explorer.EXE
Token: SeCreatePagefilePrivilege	3000	Explorer.EXE
Token: SeDebugPrivilege	860	cmstp.exe
Token: SeShutdownPrivilege	3000	Explorer.EXE
Token: SeCreatePagefilePrivilege	3000	Explorer.EXE
Token: SeShutdownPrivilege	3000	Explorer.EXE
Token: SeCreatePagefilePrivilege	3000	Explorer.EXE
Token: SeShutdownPrivilege	3000	Explorer.EXE
Token: SeCreatePagefilePrivilege	3000	Explorer.EXE
Token: SeShutdownPrivilege	3000	Explorer.EXE
Token: SeCreatePagefilePrivilege	3000	Explorer.EXE
Token: SeShutdownPrivilege	3000	Explorer.EXE
Token: SeCreatePagefilePrivilege	3000	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

RegSvcs.execmstp.exe

pid process

628 RegSvcs.exe
628 RegSvcs.exe
628 RegSvcs.exe
860 cmstp.exe
860 cmstp.exe
860 cmstp.exe
860 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
Drops file in Program Files directory 1 IoCs

Processes:

cmstp.exe

description ioc process

File opened for modification C:\Program Files (x86)\Tid-hdx6p\ujop_rp8yvy4dbt.exe cmstp.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Tid-hdx6p\ujop_rp8yvy4dbt.exe	cmstp.exe

Adds 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\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	cmstp.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ZB_LG8L0VF = "C:\\Program Files (x86)\\Tid-hdx6p\\ujop_rp8yvy4dbt.exe"	cmstp.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

Confirmation voucher.exeokxjgnm.pifExplorer.EXEcmstp.exe

description	pid	process	target process
PID 3020 wrote to memory of 1692	3020	Confirmation voucher.exe	okxjgnm.pif
PID 3020 wrote to memory of 1692	3020	Confirmation voucher.exe	okxjgnm.pif
PID 3020 wrote to memory of 1692	3020	Confirmation voucher.exe	okxjgnm.pif
PID 1692 wrote to memory of 552	1692	okxjgnm.pif	RegSvcs.exe
PID 1692 wrote to memory of 552	1692	okxjgnm.pif	RegSvcs.exe
PID 1692 wrote to memory of 552	1692	okxjgnm.pif	RegSvcs.exe
PID 1692 wrote to memory of 628	1692	okxjgnm.pif	RegSvcs.exe
PID 1692 wrote to memory of 628	1692	okxjgnm.pif	RegSvcs.exe
PID 1692 wrote to memory of 628	1692	okxjgnm.pif	RegSvcs.exe
PID 1692 wrote to memory of 628	1692	okxjgnm.pif	RegSvcs.exe
PID 1692 wrote to memory of 628	1692	okxjgnm.pif	RegSvcs.exe
PID 1692 wrote to memory of 628	1692	okxjgnm.pif	RegSvcs.exe
PID 3000 wrote to memory of 860	3000	Explorer.EXE	cmstp.exe
PID 3000 wrote to memory of 860	3000	Explorer.EXE	cmstp.exe
PID 3000 wrote to memory of 860	3000	Explorer.EXE	cmstp.exe
PID 860 wrote to memory of 472	860	cmstp.exe	cmd.exe
PID 860 wrote to memory of 472	860	cmstp.exe	cmd.exe
PID 860 wrote to memory of 472	860	cmstp.exe	cmd.exe
PID 860 wrote to memory of 3904	860	cmstp.exe	cmd.exe
PID 860 wrote to memory of 3904	860	cmstp.exe	cmd.exe
PID 860 wrote to memory of 3904	860	cmstp.exe	cmd.exe
PID 860 wrote to memory of 3828	860	cmstp.exe	Firefox.exe
PID 860 wrote to memory of 3828	860	cmstp.exe	Firefox.exe
PID 860 wrote to memory of 3828	860	cmstp.exe	Firefox.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

okxjgnm.pifRegSvcs.execmstp.exe

description	pid	process	target process
PID 1692 set thread context of 628	1692	okxjgnm.pif	RegSvcs.exe
PID 628 set thread context of 3000	628	RegSvcs.exe	Explorer.EXE
PID 860 set thread context of 3000	860	cmstp.exe	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 48 IoCs

Processes:

RegSvcs.execmstp.exe

pid	process
628	RegSvcs.exe
628	RegSvcs.exe
628	RegSvcs.exe
628	RegSvcs.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe
860	cmstp.exe

Formbook Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/628-5-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/628-5-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/628-6-0x000000000041E300-mapping.dmp	formbook
behavioral2/memory/860-11-0x0000000000000000-mapping.dmp	formbook

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmstp.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2066881839-3229799743-3576549721-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmstp.exe

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3000

C:\Users\Admin\AppData\Local\Temp\Confirmation voucher.exe
"C:\Users\Admin\AppData\Local\Temp\Confirmation voucher.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3020

C:\Users\Admin\AppData\Roaming\52828230\okxjgnm.pif
"C:\Users\Admin\AppData\Roaming\52828230\okxjgnm.pif" xllpdbhw.ifs
3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:1692

C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
"C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
4⤵
- Executes dropped EXE
PID:552

C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
"C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
PID:628

C:\Windows\SysWOW64\cmstp.exe
"C:\Windows\SysWOW64\cmstp.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: MapViewOfSection
- Drops file in Program Files directory
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Modifies Internet Explorer settings
PID:860

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
3⤵
PID:472

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:3904

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:3828

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

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

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C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe

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C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe

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C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe

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C:\Users\Admin\AppData\Roaming\52828230\bbdkgohw.ico

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C:\Users\Admin\AppData\Roaming\52828230\okxjgnm.pif

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C:\Users\Admin\AppData\Roaming\52828230\okxjgnm.pif

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C:\Users\Admin\AppData\Roaming\52828230\xllpdbhw.ifs

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memory/472-14-0x0000000000000000-mapping.dmp

Download
memory/628-5-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

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memory/628-6-0x000000000041E300-mapping.dmp

Download
memory/860-11-0x0000000000000000-mapping.dmp

Download
memory/860-13-0x00000000003F0000-0x0000000000406000-memory.dmp

Filesize
88KB

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memory/860-12-0x00000000003F0000-0x0000000000406000-memory.dmp

Filesize
88KB

Download
memory/860-15-0x00000000055E0000-0x00000000056D3000-memory.dmp

Filesize
972KB

Download
memory/860-18-0x0000000003230000-0x000000000330A000-memory.dmp

Filesize
872KB

Download
memory/1692-0-0x0000000000000000-mapping.dmp

Download
memory/3828-19-0x0000000000000000-mapping.dmp

Download
memory/3828-21-0x00007FF78E720000-0x00007FF78E7B3000-memory.dmp

Filesize
588KB

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memory/3828-20-0x00007FF78E720000-0x00007FF78E7B3000-memory.dmp

Filesize
588KB

Download
memory/3828-22-0x00007FF78E720000-0x00007FF78E7B3000-memory.dmp

Filesize
588KB

Download
memory/3904-16-0x0000000000000000-mapping.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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