formbook | dd2338c1c8e798e8428bbd62513e3ca5aafb8d238a01e67e32330c7e383f2c1f

General

Target

IMG_5391.EXE
Size

985KB
MD5

7d89ba5fdb75f333becfd437de73f6d4
SHA1

5c7c02592bfae2711c7f82647e426e06a8bc453d
SHA256

dd2338c1c8e798e8428bbd62513e3ca5aafb8d238a01e67e32330c7e383f2c1f
SHA512

c613e89d6e5015448e3db9be5162d345a7d01ecd9d86a2385787695d31a2619ea171091aae06ab199450bd22ddfb910a6158e36eaa87821c79c1c01ba8a45404

Score

10^/10

formbook persistence ransomware rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

C2

http://www.unitedfootballcamps.com/bf3/

Decoy

ecatcom.com

what3emoji.com

primbathandbody.com

yt-itclub.com

newbieeer.com

getyoursofa.com

mexicanitems.info

catalogcardgames.net

leagueofwomengolfers.com

gvanmp.com

midnightsunhi.com

cnluma.com

sunsetcherrydesigns.com

cosmoproturkey.com

inifinityapps.net

making50masks.com

battalionice.com

uk-calculation.net

frosteatlove.com

bs-mag.com

Signatures

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

Formbook Payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/1612-26-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/1612-27-0x000000000041EBE0-mapping.dmp	formbook
behavioral1/memory/572-38-0x0000000000080000-0x00000000000AE000-memory.dmp	formbook

Executes dropped EXE 2 IoCs

Processes:

nsou.exeAddInProcess32.exe

pid process

1640 nsou.exe
1612 AddInProcess32.exe
Loads dropped DLL 2 IoCs

Processes:

IMG_5391.EXEnsou.exe

pid process

1832 IMG_5391.EXE
1640 nsou.exe

pid	process
1640	nsou.exe
1612	AddInProcess32.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\naets = "C:\\Users\\Admin\\AppData\\Roaming\\nsou.exe"	reg.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
ransomware

System Information Discovery
T1082

Suspicious use of SetThreadContext 4 IoCs

Processes:

nsou.exeAddInProcess32.exechkdsk.exe

description	pid	process	target process
PID 1640 set thread context of 1612	1640	nsou.exe	AddInProcess32.exe
PID 1612 set thread context of 1244	1612	AddInProcess32.exe	Explorer.EXE
PID 1612 set thread context of 1244	1612	AddInProcess32.exe	Explorer.EXE
PID 572 set thread context of 1244	572	chkdsk.exe	Explorer.EXE

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

chkdsk.exe

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier chkdsk.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 34 IoCs

Processes:

IMG_5391.EXEnsou.exeAddInProcess32.exechkdsk.exe

pid	process
1832	IMG_5391.EXE
1832	IMG_5391.EXE
1832	IMG_5391.EXE
1832	IMG_5391.EXE
1832	IMG_5391.EXE
1640	nsou.exe
1640	nsou.exe
1612	AddInProcess32.exe
1612	AddInProcess32.exe
1612	AddInProcess32.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe
572	chkdsk.exe

Suspicious behavior: MapViewOfSection 6 IoCs

Processes:

AddInProcess32.exechkdsk.exe

pid process

1612 AddInProcess32.exe
1612 AddInProcess32.exe
1612 AddInProcess32.exe
1612 AddInProcess32.exe
572 chkdsk.exe
572 chkdsk.exe

pid	process
1612	AddInProcess32.exe
1612	AddInProcess32.exe
1612	AddInProcess32.exe
1612	AddInProcess32.exe
572	chkdsk.exe
572	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

IMG_5391.EXEnsou.exeAddInProcess32.exechkdsk.exe

description	pid	process
Token: SeDebugPrivilege	1832	IMG_5391.EXE
Token: SeDebugPrivilege	1640	nsou.exe
Token: SeDebugPrivilege	1612	AddInProcess32.exe
Token: SeDebugPrivilege	572	chkdsk.exe

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

Explorer.EXE

pid process

1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
Suspicious use of SendNotifyMessage 4 IoCs

Processes:

Explorer.EXE

pid process

1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE
1244 Explorer.EXE

pid	process
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE

pid	process
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE
1244	Explorer.EXE

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

IMG_5391.EXEcmd.exensou.exeExplorer.EXEchkdsk.exe

description	pid	process	target process
PID 1832 wrote to memory of 1724	1832	IMG_5391.EXE	cmd.exe
PID 1832 wrote to memory of 1724	1832	IMG_5391.EXE	cmd.exe
PID 1832 wrote to memory of 1724	1832	IMG_5391.EXE	cmd.exe
PID 1832 wrote to memory of 1724	1832	IMG_5391.EXE	cmd.exe
PID 1724 wrote to memory of 1616	1724	cmd.exe	reg.exe
PID 1724 wrote to memory of 1616	1724	cmd.exe	reg.exe
PID 1724 wrote to memory of 1616	1724	cmd.exe	reg.exe
PID 1724 wrote to memory of 1616	1724	cmd.exe	reg.exe
PID 1832 wrote to memory of 1640	1832	IMG_5391.EXE	nsou.exe
PID 1832 wrote to memory of 1640	1832	IMG_5391.EXE	nsou.exe
PID 1832 wrote to memory of 1640	1832	IMG_5391.EXE	nsou.exe
PID 1832 wrote to memory of 1640	1832	IMG_5391.EXE	nsou.exe
PID 1640 wrote to memory of 1612	1640	nsou.exe	AddInProcess32.exe
PID 1640 wrote to memory of 1612	1640	nsou.exe	AddInProcess32.exe
PID 1640 wrote to memory of 1612	1640	nsou.exe	AddInProcess32.exe
PID 1640 wrote to memory of 1612	1640	nsou.exe	AddInProcess32.exe
PID 1640 wrote to memory of 1612	1640	nsou.exe	AddInProcess32.exe
PID 1640 wrote to memory of 1612	1640	nsou.exe	AddInProcess32.exe
PID 1640 wrote to memory of 1612	1640	nsou.exe	AddInProcess32.exe
PID 1244 wrote to memory of 572	1244	Explorer.EXE	chkdsk.exe
PID 1244 wrote to memory of 572	1244	Explorer.EXE	chkdsk.exe
PID 1244 wrote to memory of 572	1244	Explorer.EXE	chkdsk.exe
PID 1244 wrote to memory of 572	1244	Explorer.EXE	chkdsk.exe
PID 572 wrote to memory of 736	572	chkdsk.exe	cmd.exe
PID 572 wrote to memory of 736	572	chkdsk.exe	cmd.exe
PID 572 wrote to memory of 736	572	chkdsk.exe	cmd.exe
PID 572 wrote to memory of 736	572	chkdsk.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1244

C:\Users\Admin\AppData\Local\Temp\IMG_5391.EXE
"C:\Users\Admin\AppData\Local\Temp\IMG_5391.EXE"
2⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1832

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "naets" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\nsou.exe"
3⤵
- Suspicious use of WriteProcessMemory
PID:1724

C:\Windows\SysWOW64\reg.exe
REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "naets" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\nsou.exe"
4⤵
- Adds Run key to start application
PID:1616

C:\Users\Admin\AppData\Roaming\nsou.exe
"C:\Users\Admin\AppData\Roaming\nsou.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1640

C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
"C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1612

C:\Windows\SysWOW64\chkdsk.exe
"C:\Windows\SysWOW64\chkdsk.exe"
2⤵
- Suspicious use of SetThreadContext
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:572

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
3⤵
PID:736

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

1

T1112

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
C:\Users\Admin\AppData\Roaming\nsou.exe
MD5
7d89ba5fdb75f333becfd437de73f6d4

SHA1
5c7c02592bfae2711c7f82647e426e06a8bc453d

SHA256
dd2338c1c8e798e8428bbd62513e3ca5aafb8d238a01e67e32330c7e383f2c1f

SHA512
c613e89d6e5015448e3db9be5162d345a7d01ecd9d86a2385787695d31a2619ea171091aae06ab199450bd22ddfb910a6158e36eaa87821c79c1c01ba8a45404

Download Submit
C:\Users\Admin\AppData\Roaming\nsou.exe
MD5
7d89ba5fdb75f333becfd437de73f6d4

SHA1
5c7c02592bfae2711c7f82647e426e06a8bc453d

SHA256
dd2338c1c8e798e8428bbd62513e3ca5aafb8d238a01e67e32330c7e383f2c1f

SHA512
c613e89d6e5015448e3db9be5162d345a7d01ecd9d86a2385787695d31a2619ea171091aae06ab199450bd22ddfb910a6158e36eaa87821c79c1c01ba8a45404

Download Submit
\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
\Users\Admin\AppData\Roaming\nsou.exe
MD5
7d89ba5fdb75f333becfd437de73f6d4

SHA1
5c7c02592bfae2711c7f82647e426e06a8bc453d

SHA256
dd2338c1c8e798e8428bbd62513e3ca5aafb8d238a01e67e32330c7e383f2c1f

SHA512
c613e89d6e5015448e3db9be5162d345a7d01ecd9d86a2385787695d31a2619ea171091aae06ab199450bd22ddfb910a6158e36eaa87821c79c1c01ba8a45404

Download Submit
memory/572-40-0x0000000001EE0000-0x0000000001F73000-memory.dmp

Filesize
588KB

Download
memory/572-39-0x0000000002000000-0x0000000002303000-memory.dmp

Filesize
3.0MB

Download
memory/572-38-0x0000000000080000-0x00000000000AE000-memory.dmp

Filesize
184KB

Download
memory/572-37-0x0000000000A60000-0x0000000000A67000-memory.dmp

Filesize
28KB

Download
memory/572-35-0x0000000000000000-mapping.dmp

Download
memory/736-36-0x0000000000000000-mapping.dmp

Download
memory/1244-32-0x0000000006B10000-0x0000000006C9F000-memory.dmp

Filesize
1.6MB

Download
memory/1244-34-0x0000000006CA0000-0x0000000006DC7000-memory.dmp

Filesize
1.2MB

Download
memory/1244-41-0x0000000006FC0000-0x000000000713B000-memory.dmp

Filesize
1.5MB

Download
memory/1612-31-0x0000000000210000-0x0000000000224000-memory.dmp

Filesize
80KB

Download
memory/1612-27-0x000000000041EBE0-mapping.dmp

Download
memory/1612-33-0x0000000000250000-0x0000000000264000-memory.dmp

Filesize
80KB

Download
memory/1612-30-0x0000000000880000-0x0000000000B83000-memory.dmp

Filesize
3.0MB

Download
memory/1612-26-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1616-9-0x0000000000000000-mapping.dmp

Download
memory/1640-16-0x0000000000B30000-0x0000000000B31000-memory.dmp

Filesize
4KB

Download
memory/1640-25-0x00000000049F1000-0x00000000049F2000-memory.dmp

Filesize
4KB

Download
memory/1640-20-0x00000000049F0000-0x00000000049F1000-memory.dmp

Filesize
4KB

Download
memory/1640-22-0x0000000000A30000-0x0000000000A31000-memory.dmp

Filesize
4KB

Download
memory/1640-15-0x0000000073980000-0x000000007406E000-memory.dmp

Filesize
6.9MB

Download
memory/1640-21-0x0000000000840000-0x000000000084B000-memory.dmp

Filesize
44KB

Download
memory/1640-12-0x0000000000000000-mapping.dmp

Download
memory/1724-8-0x0000000000000000-mapping.dmp

Download
memory/1832-2-0x0000000073980000-0x000000007406E000-memory.dmp

Filesize
6.9MB

Download
memory/1832-10-0x00000000049E1000-0x00000000049E2000-memory.dmp

Filesize
4KB

Download
memory/1832-7-0x00000000049E0000-0x00000000049E1000-memory.dmp

Filesize
4KB

Download
memory/1832-6-0x0000000000330000-0x0000000000331000-memory.dmp

Filesize
4KB

Download
memory/1832-5-0x0000000000300000-0x000000000031E000-memory.dmp

Filesize
120KB

Download
memory/1832-3-0x00000000000C0000-0x00000000000C1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads