formbook | aea480ebd5777e840f0b988267554fe1d35f70238bed009231b24475fdc0b0d9

General

Target

Purchase advice and details.exe
Size

663KB
MD5

8c49a740ef92731629ce744ca1fece7b
SHA1

db2d80f5deba46f40be9357c3576e72aaed73ce5
SHA256

aea480ebd5777e840f0b988267554fe1d35f70238bed009231b24475fdc0b0d9
SHA512

eb78fcea1a1e5ceb762f620f21cf9e86eac873f1f27a6337e4d41a37396e79bf8bdbe46830e032f899df7d97aeca940d16b70255a4bcfa94430c8b78056c8c35

Score

10^/10

trojan spyware stealer formbook persistence evasion

Malware Config

Signatures

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Cyjlh\chkdsk3fylz.exe	cmmon32.exe

Adds Run entry 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\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	cmmon32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\IZ7DANEXF0 = "C:\\Program Files (x86)\\Cyjlh\\chkdsk3fylz.exe"	cmmon32.exe

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 FindShellTrayWindow 5 IoCs

pid	Process
1308	Explorer.EXE
1308	Explorer.EXE
1308	Explorer.EXE
1308	Explorer.EXE
1308	Explorer.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

Deletes itself 1 IoCs

pid	Process
1420	cmd.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1116 wrote to memory of 1140	1116	Purchase advice and details.exe	24
PID 1116 wrote to memory of 1140	1116	Purchase advice and details.exe	24
PID 1116 wrote to memory of 1140	1116	Purchase advice and details.exe	24
PID 1116 wrote to memory of 1140	1116	Purchase advice and details.exe	24
PID 1308 wrote to memory of 1340	1308	Explorer.EXE	25
PID 1308 wrote to memory of 1340	1308	Explorer.EXE	25
PID 1308 wrote to memory of 1340	1308	Explorer.EXE	25
PID 1308 wrote to memory of 1340	1308	Explorer.EXE	25
PID 1340 wrote to memory of 1420	1340	cmmon32.exe	26
PID 1340 wrote to memory of 1420	1340	cmmon32.exe	26
PID 1340 wrote to memory of 1420	1340	cmmon32.exe	26
PID 1340 wrote to memory of 1420	1340	cmmon32.exe	26
PID 1340 wrote to memory of 1524	1340	cmmon32.exe	29
PID 1340 wrote to memory of 1524	1340	cmmon32.exe	29
PID 1340 wrote to memory of 1524	1340	cmmon32.exe	29
PID 1340 wrote to memory of 1524	1340	cmmon32.exe	29
PID 1340 wrote to memory of 1524	1340	cmmon32.exe	29

Suspicious behavior: MapViewOfSection 8 IoCs

pid	Process
1116	Purchase advice and details.exe
1140	Purchase advice and details.exe
1140	Purchase advice and details.exe
1140	Purchase advice and details.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1116 set thread context of 1140	1116	Purchase advice and details.exe	24
PID 1140 set thread context of 1308	1140	Purchase advice and details.exe	20
PID 1340 set thread context of 1308	1340	cmmon32.exe	20

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
1116	Purchase advice and details.exe
1140	Purchase advice and details.exe
1140	Purchase advice and details.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe
1340	cmmon32.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
1308	Explorer.EXE
1308	Explorer.EXE
1308	Explorer.EXE
1308	Explorer.EXE

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
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 use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1140	Purchase advice and details.exe
Token: SeDebugPrivilege	1340	cmmon32.exe
Token: SeShutdownPrivilege	1308	Explorer.EXE

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Checks whether UAC is enabled
- Suspicious use of WriteProcessMemory
- Suspicious use of SendNotifyMessage
- Suspicious use of AdjustPrivilegeToken
PID:1308
- C:\Users\Admin\AppData\Local\Temp\Purchase advice and details.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase advice and details.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  PID:1116
- - C:\Users\Admin\AppData\Local\Temp\Purchase advice and details.exe
    "C:\Users\Admin\AppData\Local\Temp\Purchase advice and details.exe"
    3⤵
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1140
- C:\Windows\SysWOW64\cmmon32.exe
  "C:\Windows\SysWOW64\cmmon32.exe"
  2⤵
  - Drops file in Program Files directory
  - Adds Run entry to start application
  - Modifies Internet Explorer settings
  - Suspicious use of WriteProcessMemory
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1340
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Purchase advice and details.exe"
    3⤵
    - Deletes itself
    PID:1420
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1524

Network

MITRE ATT&CK Enterprise 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

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/1140-0-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

Download
memory/1340-8-0x00000000768C0000-0x0000000076A1C000-memory.dmp

Filesize
1.4MB

Download
memory/1340-7-0x0000000075070000-0x000000007518D000-memory.dmp

Filesize
1.1MB

Download
memory/1340-6-0x0000000077410000-0x000000007741C000-memory.dmp

Filesize
48KB

Download
memory/1340-9-0x0000000003B00000-0x0000000003BE2000-memory.dmp

Filesize
904KB

Download
memory/1340-5-0x0000000002F10000-0x0000000003015000-memory.dmp

Filesize
1.0MB

Download
memory/1340-3-0x0000000000370000-0x000000000037D000-memory.dmp

Filesize
52KB

Download
memory/1524-11-0x000000013FDF0000-0x000000013FE83000-memory.dmp

Filesize
588KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads