formbook | 61ce5023167c9a25d41656e8bd12b05769fac072fc6edf6024641ae2c77c8ece

Analysis

max time kernel
148s
max time network
105s
platform
windows7_x64
resource
win7
submitted
03/08/2020, 09:26

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General

Target
BL COPY.exe
Size 392KB
Sample200803-pyz2thze76
SHA256 61ce5023167c9a25d41656e8bd12b05769fac072fc6edf6024641ae2c77c8ece
MD5 8fffb7619b8621a8e71a5f4c0337db89
SHA1 e63c00b12ce68c4492b8251df3a249fd5c3c826e
SHA512 ec03755201b5aac0ecfdf5b526f2e1d53ffab0cd8967397fb26950464d19dbd957284ef17757c36bce63b17c1134f17cce1636b189862a4123afa9d7c6fb9df6
MD5 SHA1 SHA512

Score

10^/10

rat trojan spyware stealer formbook evasion

Malware Config

Signatures

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1088 wrote to memory of 836	1088	BL COPY.exe	24
PID 1088 wrote to memory of 836	1088	BL COPY.exe	24
PID 1088 wrote to memory of 836	1088	BL COPY.exe	24
PID 1088 wrote to memory of 836	1088	BL COPY.exe	24
PID 1088 wrote to memory of 836	1088	BL COPY.exe	24
PID 1088 wrote to memory of 836	1088	BL COPY.exe	24
PID 1088 wrote to memory of 836	1088	BL COPY.exe	24
PID 1088 wrote to memory of 1284	1088	BL COPY.exe	25
PID 1088 wrote to memory of 1284	1088	BL COPY.exe	25
PID 1088 wrote to memory of 1284	1088	BL COPY.exe	25
PID 1088 wrote to memory of 1284	1088	BL COPY.exe	25
PID 1088 wrote to memory of 644	1088	BL COPY.exe	27
PID 1088 wrote to memory of 644	1088	BL COPY.exe	27
PID 1088 wrote to memory of 644	1088	BL COPY.exe	27
PID 1088 wrote to memory of 644	1088	BL COPY.exe	27
PID 644 wrote to memory of 792	644	cmd.exe	29
PID 644 wrote to memory of 792	644	cmd.exe	29
PID 644 wrote to memory of 792	644	cmd.exe	29
PID 644 wrote to memory of 792	644	cmd.exe	29
PID 1276 wrote to memory of 744	1276	Explorer.EXE	30
PID 1276 wrote to memory of 744	1276	Explorer.EXE	30
PID 1276 wrote to memory of 744	1276	Explorer.EXE	30
PID 1276 wrote to memory of 744	1276	Explorer.EXE	30
PID 1088 wrote to memory of 324	1088	BL COPY.exe	31
PID 1088 wrote to memory of 324	1088	BL COPY.exe	31
PID 1088 wrote to memory of 324	1088	BL COPY.exe	31
PID 1088 wrote to memory of 324	1088	BL COPY.exe	31
PID 744 wrote to memory of 1340	744	cscript.exe	34
PID 744 wrote to memory of 1340	744	cscript.exe	34
PID 744 wrote to memory of 1340	744	cscript.exe	34
PID 744 wrote to memory of 1340	744	cscript.exe	34
PID 744 wrote to memory of 1340	744	cscript.exe	34

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
836	BL COPY.exe
836	BL COPY.exe
836	BL COPY.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.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

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

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1088	BL COPY.exe
Token: SeDebugPrivilege	836	BL COPY.exe
Token: SeDebugPrivilege	744	cscript.exe
Token: SeShutdownPrivilege	1276	Explorer.EXE

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1088 set thread context of 836	1088	BL COPY.exe	24
PID 836 set thread context of 1276	836	BL COPY.exe	20
PID 744 set thread context of 1276	744	cscript.exe	20

NTFS ADS 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\FolderN\name.exe:Zone.Identifier	cmd.exe

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

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
1276	Explorer.EXE
1276	Explorer.EXE
1276	Explorer.EXE
1276	Explorer.EXE
1276	Explorer.EXE

Formbook Payload 4 IoCs

rat

resource	yara_rule
behavioral1/memory/836-0-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/836-0-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/836-1-0x000000000041ED30-mapping.dmp	formbook
behavioral1/memory/744-8-0x0000000000000000-mapping.dmp	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	cscript.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
1088	BL COPY.exe
836	BL COPY.exe
836	BL COPY.exe
1088	BL COPY.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe
744	cscript.exe

Loads dropped DLL 1 IoCs

pid	Process
1088	BL COPY.exe

Blacklisted process makes network request 1 IoCs

flow	pid	Process
15	744	cscript.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
1276	Explorer.EXE
1276	Explorer.EXE
1276	Explorer.EXE
1276	Explorer.EXE

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
- Checks whether UAC is enabled
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1276
- C:\Users\Admin\AppData\Local\Temp\BL COPY.exe
  "C:\Users\Admin\AppData\Local\Temp\BL COPY.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Loads dropped DLL
  PID:1088
- - C:\Users\Admin\AppData\Local\Temp\BL COPY.exe
    "C:/Users/Admin/AppData/Local/Temp/BL COPY.exe"
    3⤵
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    PID:836
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c copy "C:/Users/Admin/AppData/Local/Temp/BL COPY.exe" "%temp%\FolderN\name.exe" /Y
    3⤵
    PID:1284
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "%temp%\FolderN\name.exe.lnk" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:644
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\FolderN\name.exe.lnk" /f
      4⤵
      PID:792
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c echo [zoneTransfer]ZoneID = 2 > %temp%\FolderN\name.exe:Zone.Identifier
    3⤵
    - NTFS ADS
    PID:324
- C:\Windows\SysWOW64\cscript.exe
  "C:\Windows\SysWOW64\cscript.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetThreadContext
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Blacklisted process makes network request
  PID:744
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:1340

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/744-9-0x0000000000590000-0x00000000005B2000-memory.dmp

Download

memory/744-10-0x0000000003440000-0x000000000353C000-memory.dmp

Download

memory/744-11-0x0000000004270000-0x000000000439E000-memory.dmp

Download

memory/836-0-0x0000000000400000-0x000000000042E000-memory.dmp

Download

memory/1340-13-0x000000013FD30000-0x000000013FDC3000-memory.dmp

Download