formbook | 16c13e9c3a49e89d047f1b589596d24bc332af9d28ea6235aedd930e00b51281

General

Target
SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
Size 750KB
Sample200721-ax4ycfb91e
SHA256 16c13e9c3a49e89d047f1b589596d24bc332af9d28ea6235aedd930e00b51281
MD5 f5f99bf4a581180e9b7c0b2a0c31af27
SHA1 d1d911710a427b0c13ea4ca9ebeceec950267597
SHA512 97c99ace413423b45114601b2c14f56bc3fe9b3a18471ffc7e5979647af82bac9600ede62ceec7bf54125d1bdfa6868bfd91f839d11ac5b67d8a3c0ca60d7d24
MD5 SHA1 SHA512

Score

10^/10

evasion trojan spyware stealer formbook persistence

Malware Config

Signatures

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1144 set thread context of 840	1144	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe	24
PID 840 set thread context of 1264	840	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe	20
PID 1324 set thread context of 1264	1324	cmmon32.exe	20

Deletes itself 1 IoCs

pid	Process
1412	cmd.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

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

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer	cmmon32.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

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
1144	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
840	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
840	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	cmmon32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\_BGXTX2 = "C:\\Program Files (x86)\\Myz8tkzix\\userz4atqpah.exe"	cmmon32.exe

Suspicious behavior: MapViewOfSection 8 IoCs

pid	Process
1144	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
840	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
840	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
840	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe
1324	cmmon32.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Myz8tkzix\userz4atqpah.exe	cmmon32.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1144 wrote to memory of 840	1144	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe	24
PID 1144 wrote to memory of 840	1144	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe	24
PID 1144 wrote to memory of 840	1144	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe	24
PID 1144 wrote to memory of 840	1144	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe	24
PID 1264 wrote to memory of 1324	1264	Explorer.EXE	25
PID 1264 wrote to memory of 1324	1264	Explorer.EXE	25
PID 1264 wrote to memory of 1324	1264	Explorer.EXE	25
PID 1264 wrote to memory of 1324	1264	Explorer.EXE	25
PID 1324 wrote to memory of 1412	1324	cmmon32.exe	26
PID 1324 wrote to memory of 1412	1324	cmmon32.exe	26
PID 1324 wrote to memory of 1412	1324	cmmon32.exe	26
PID 1324 wrote to memory of 1412	1324	cmmon32.exe	26
PID 1324 wrote to memory of 1792	1324	cmmon32.exe	29
PID 1324 wrote to memory of 1792	1324	cmmon32.exe	29
PID 1324 wrote to memory of 1792	1324	cmmon32.exe	29
PID 1324 wrote to memory of 1792	1324	cmmon32.exe	29
PID 1324 wrote to memory of 1792	1324	cmmon32.exe	29

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE
1264	Explorer.EXE

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

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1131729243-447456001-3632642222-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	cmmon32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	840	SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
Token: SeDebugPrivilege	1324	cmmon32.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Checks whether UAC is enabled
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
- Suspicious use of SendNotifyMessage
PID:1264
- C:\Users\Admin\AppData\Local\Temp\SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1144
- - C:\Users\Admin\AppData\Local\Temp\SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:840
- C:\Windows\SysWOW64\cmmon32.exe
  "C:\Windows\SysWOW64\cmmon32.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System policy modification
  - Suspicious behavior: EnumeratesProcesses
  - Adds policy Run key to start application
  - Suspicious behavior: MapViewOfSection
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  - Modifies Internet Explorer settings
  - Suspicious use of AdjustPrivilegeToken
  PID:1324
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\SHIPPING_DOC_MV MAERSK HANGZHOU_V.698E_pdf.exe"
    3⤵
    - Deletes itself
    PID:1412
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1792

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

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Downloads

memory/840-0-0x0000000000400000-0x000000000042D000-memory.dmp

Download

memory/1324-8-0x00000000764F0000-0x000000007664C000-memory.dmp

Download

memory/1324-7-0x00000000761D0000-0x00000000762ED000-memory.dmp

Download

memory/1324-6-0x0000000075000000-0x000000007500C000-memory.dmp

Download

memory/1324-9-0x0000000003B60000-0x0000000003C71000-memory.dmp

Download

memory/1324-5-0x0000000003090000-0x00000000031BD000-memory.dmp

Download

memory/1324-3-0x00000000003B0000-0x00000000003BD000-memory.dmp

Download

memory/1792-11-0x000000013F9B0000-0x000000013FA43000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads