formbook | c36f38554da7bc44cfd05724102b03e721bbb40e379ebf31b8d63cf07ff8f9f6

General

Target

orden de compra.exe
Size

385KB
MD5

e496718a8033ca85b0a6ff3ea197828c
SHA1

6e150649bd44e3c8023589eaadd2633b09a14d81
SHA256

bc207dbe79daf9a2da67fd90beef3fbe5db670288fd9c1da72ccda9c65d3d028
SHA512

05b483ec56adef219d6e273d9b1882898121d1d3d0c3df1b87f384a2583cf4ff8189f07608f1ee4a3e6152a175dda6de1fc1bffd85071b91626ea9b2c00c6831

Score

10^/10

formbook kvsz persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

kvsz

Decoy

okashyns.com

sbsgamedaejeon-two.com

drb77.com

top5dating.com

websprings.online

voizers.com

zenith.site

lahistoriade.com

qv85.com

armandonieto.com

priestvedic.com

jessandjeff.net

magic-desktop.com

jitaji.com

ldmeili.com

yuwanqingmy.com

buzhouorg.com

chaiseloungereviews.com

m2g8way.com

freespin-support.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Formbook Payload 4 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/568-64-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/568-65-0x000000000041ECA0-mapping.dmp	formbook
behavioral1/memory/568-67-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1932-77-0x00000000000C0000-0x00000000000EE000-memory.dmp	formbook

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

cmmon32.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	cmmon32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\DRMPANTPOL = "C:\\Program Files (x86)\\Mmrwlrv_\\ThumbCachejpmxv4sh.exe"	cmmon32.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

orden de compra.exeRegSvcs.execmmon32.exe

description	pid	process	target process
PID 1392 set thread context of 568	1392	orden de compra.exe	RegSvcs.exe
PID 568 set thread context of 1312	568	RegSvcs.exe	Explorer.EXE
PID 568 set thread context of 1312	568	RegSvcs.exe	Explorer.EXE
PID 1932 set thread context of 1312	1932	cmmon32.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

cmmon32.exe

description ioc process

File opened for modification C:\Program Files (x86)\Mmrwlrv_\ThumbCachejpmxv4sh.exe cmmon32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

952 schtasks.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Mmrwlrv_\ThumbCachejpmxv4sh.exe	cmmon32.exe

pid	process
952	schtasks.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

cmmon32.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1083475884-596052423-1669053738-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmmon32.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

Processes:

orden de compra.exeRegSvcs.execmmon32.exe

pid	process
1392	orden de compra.exe
1392	orden de compra.exe
1392	orden de compra.exe
568	RegSvcs.exe
568	RegSvcs.exe
568	RegSvcs.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

RegSvcs.execmmon32.exe

pid process

568 RegSvcs.exe
568 RegSvcs.exe
568 RegSvcs.exe
568 RegSvcs.exe
1932 cmmon32.exe
1932 cmmon32.exe
1932 cmmon32.exe
1932 cmmon32.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

orden de compra.exeRegSvcs.execmmon32.exe

description pid process

Token: SeDebugPrivilege 1392 orden de compra.exe
Token: SeDebugPrivilege 568 RegSvcs.exe
Token: SeDebugPrivilege 1932 cmmon32.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1312 Explorer.EXE
1312 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1312 Explorer.EXE
1312 Explorer.EXE

pid	process
568	RegSvcs.exe
568	RegSvcs.exe
568	RegSvcs.exe
568	RegSvcs.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe
1932	cmmon32.exe

description	pid	process
Token: SeDebugPrivilege	1392	orden de compra.exe
Token: SeDebugPrivilege	568	RegSvcs.exe
Token: SeDebugPrivilege	1932	cmmon32.exe

pid	process
1312	Explorer.EXE
1312	Explorer.EXE

pid	process
1312	Explorer.EXE
1312	Explorer.EXE

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

orden de compra.exeExplorer.EXEcmmon32.exe

description	pid	process	target process
PID 1392 wrote to memory of 952	1392	orden de compra.exe	schtasks.exe
PID 1392 wrote to memory of 952	1392	orden de compra.exe	schtasks.exe
PID 1392 wrote to memory of 952	1392	orden de compra.exe	schtasks.exe
PID 1392 wrote to memory of 952	1392	orden de compra.exe	schtasks.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1392 wrote to memory of 568	1392	orden de compra.exe	RegSvcs.exe
PID 1312 wrote to memory of 1932	1312	Explorer.EXE	cmmon32.exe
PID 1312 wrote to memory of 1932	1312	Explorer.EXE	cmmon32.exe
PID 1312 wrote to memory of 1932	1312	Explorer.EXE	cmmon32.exe
PID 1312 wrote to memory of 1932	1312	Explorer.EXE	cmmon32.exe
PID 1932 wrote to memory of 1148	1932	cmmon32.exe	cmd.exe
PID 1932 wrote to memory of 1148	1932	cmmon32.exe	cmd.exe
PID 1932 wrote to memory of 1148	1932	cmmon32.exe	cmd.exe
PID 1932 wrote to memory of 1148	1932	cmmon32.exe	cmd.exe
PID 1932 wrote to memory of 916	1932	cmmon32.exe	Firefox.exe
PID 1932 wrote to memory of 916	1932	cmmon32.exe	Firefox.exe
PID 1932 wrote to memory of 916	1932	cmmon32.exe	Firefox.exe
PID 1932 wrote to memory of 916	1932	cmmon32.exe	Firefox.exe
PID 1932 wrote to memory of 916	1932	cmmon32.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1312

C:\Users\Admin\AppData\Local\Temp\orden de compra.exe
"C:\Users\Admin\AppData\Local\Temp\orden de compra.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1392

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\zDhkri" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEC82.tmp"
3⤵
- Creates scheduled task(s)
PID:952

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:568

C:\Windows\SysWOW64\cmmon32.exe
"C:\Windows\SysWOW64\cmmon32.exe"
2⤵
- Adds Run key to start application
- 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
PID:1932

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
3⤵
PID:1148

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:916

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpEC82.tmp
Filesize
1KB

MD5
78ceb1a128488195b028f6cec19d9d73

SHA1
85ca5e4311620e3656378214cd16138fd40c2389

SHA256
48aa41a07af7794fd8a2724ea4d94dedc78bb6957abcca3f8a22987ae9fcd61c

SHA512
f23b6221e393724efd0f74a3afd0b54646eb700a0e211c8299422f50229a16779308109d91d871ef246cd4894c8c242753cdc8373e4c9746aa6edf899e0600bc

Download Submit
memory/568-68-0x00000000008D0000-0x0000000000BD3000-memory.dmp

Filesize
3.0MB

Download
memory/568-65-0x000000000041ECA0-mapping.dmp

Download
memory/568-67-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/568-72-0x00000000001F0000-0x0000000000204000-memory.dmp

Filesize
80KB

Download
memory/568-61-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/568-62-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/568-64-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/568-69-0x0000000000190000-0x00000000001A4000-memory.dmp

Filesize
80KB

Download
memory/952-59-0x0000000000000000-mapping.dmp

Download
memory/1148-75-0x0000000000000000-mapping.dmp

Download
memory/1312-80-0x0000000003D60000-0x0000000003E20000-memory.dmp

Filesize
768KB

Download
memory/1312-70-0x0000000006210000-0x0000000006301000-memory.dmp

Filesize
964KB

Download
memory/1312-73-0x0000000006310000-0x0000000006402000-memory.dmp

Filesize
968KB

Download
memory/1392-56-0x0000000000310000-0x000000000031A000-memory.dmp

Filesize
40KB

Download
memory/1392-57-0x0000000000650000-0x00000000006A8000-memory.dmp

Filesize
352KB

Download
memory/1392-55-0x0000000075951000-0x0000000075953000-memory.dmp

Filesize
8KB

Download
memory/1392-58-0x0000000000420000-0x0000000000454000-memory.dmp

Filesize
208KB

Download
memory/1392-54-0x0000000000C10000-0x0000000000C76000-memory.dmp

Filesize
408KB

Download
memory/1932-74-0x0000000000000000-mapping.dmp

Download
memory/1932-77-0x00000000000C0000-0x00000000000EE000-memory.dmp

Filesize
184KB

Download
memory/1932-76-0x0000000000310000-0x000000000031D000-memory.dmp

Filesize
52KB

Download
memory/1932-78-0x0000000001FC0000-0x00000000022C3000-memory.dmp

Filesize
3.0MB

Download
memory/1932-79-0x0000000000880000-0x0000000000913000-memory.dmp

Filesize
588KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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