formbook | f58398d719869f9ce7478274ee24fe8c714184d37289efc2496c0ba52c64e0ce

General

Target

Orderfor july.xlsx
Size

14KB
MD5

d27eeb485092524e4b2080ec1260da80
SHA1

ea9031e9ffdefbcd760ca2dcc8f5c7015e113b51
SHA256

f58398d719869f9ce7478274ee24fe8c714184d37289efc2496c0ba52c64e0ce
SHA512

23f5b1089624c01804a7aec893c6a465f028347be52ff78d0505e38b847e2537a6ccebb65e01a1d9aa45cb4a1fbb60e06d34d182203dfd38169729e169f22a7f

Score

10^/10

trojan spyware stealer formbook persistence evasion

Malware Config

Signatures

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

Processes:

EQNEDT32.EXE

pid	Process
336	EQNEDT32.EXE

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

Explorer.EXE

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

Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

regasms.exeregasms.exeraserver.exe

pid	Process
1760	regasms.exe
1880	regasms.exe
1880	regasms.exe
1880	regasms.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

Processes:

raserver.exe

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

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

raserver.exe

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

Processes:

EXCEL.EXE

pid	Process
1492	EXCEL.EXE

Loads dropped DLL 2 IoCs

Processes:

EQNEDT32.EXE

pid	Process
336	EQNEDT32.EXE
336	EQNEDT32.EXE

Suspicious behavior: EnumeratesProcesses 29 IoCs

Processes:

regasms.exeregasms.exeraserver.exe

pid	Process
1760	regasms.exe
1880	regasms.exe
1880	regasms.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe
1920	raserver.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

regasms.exeregasms.exeraserver.exe

description	pid	Process	procid_target
PID 1760 set thread context of 1880	1760	regasms.exe	28
PID 1880 set thread context of 1228	1880	regasms.exe	20
PID 1920 set thread context of 1228	1920	raserver.exe	20

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

regasms.exeraserver.exe

description	pid	Process
Token: SeDebugPrivilege	1880	regasms.exe
Token: SeDebugPrivilege	1920	raserver.exe

Suspicious use of FindShellTrayWindow 8 IoCs

Processes:

Explorer.EXE

pid	Process
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

raserver.exe

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Dnnux\igfxefg8.exe	raserver.exe

Blacklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow	pid	Process
5	336	EQNEDT32.EXE

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

EQNEDT32.EXEregasms.exeExplorer.EXEraserver.exe

description	pid	Process	procid_target
PID 336 wrote to memory of 1760	336	EQNEDT32.EXE	27
PID 336 wrote to memory of 1760	336	EQNEDT32.EXE	27
PID 336 wrote to memory of 1760	336	EQNEDT32.EXE	27
PID 336 wrote to memory of 1760	336	EQNEDT32.EXE	27
PID 1760 wrote to memory of 1880	1760	regasms.exe	28
PID 1760 wrote to memory of 1880	1760	regasms.exe	28
PID 1760 wrote to memory of 1880	1760	regasms.exe	28
PID 1760 wrote to memory of 1880	1760	regasms.exe	28
PID 1228 wrote to memory of 1920	1228	Explorer.EXE	30
PID 1228 wrote to memory of 1920	1228	Explorer.EXE	30
PID 1228 wrote to memory of 1920	1228	Explorer.EXE	30
PID 1228 wrote to memory of 1920	1228	Explorer.EXE	30
PID 1920 wrote to memory of 1648	1920	raserver.exe	31
PID 1920 wrote to memory of 1648	1920	raserver.exe	31
PID 1920 wrote to memory of 1648	1920	raserver.exe	31
PID 1920 wrote to memory of 1648	1920	raserver.exe	31
PID 1920 wrote to memory of 2020	1920	raserver.exe	33
PID 1920 wrote to memory of 2020	1920	raserver.exe	33
PID 1920 wrote to memory of 2020	1920	raserver.exe	33
PID 1920 wrote to memory of 2020	1920	raserver.exe	33
PID 1920 wrote to memory of 2020	1920	raserver.exe	33

Executes dropped EXE 2 IoCs

Processes:

regasms.exeregasms.exe

pid	Process
1760	regasms.exe
1880	regasms.exe

Suspicious use of SendNotifyMessage 7 IoCs

Processes:

Explorer.EXE

pid	Process
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE
1228	Explorer.EXE

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

Adds Run entry to policy start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

raserver.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	raserver.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\8PBXNJQ8OLP = "C:\\Program Files (x86)\\Dnnux\\igfxefg8.exe"	raserver.exe

Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid	Process
1492	EXCEL.EXE
1492	EXCEL.EXE
1492	EXCEL.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:1228
- C:\Program Files\Microsoft Office\Office14\EXCEL.EXE
  "C:\Program Files\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Orderfor july.xlsx"
  2⤵
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:1492
- C:\Windows\SysWOW64\raserver.exe
  "C:\Windows\SysWOW64\raserver.exe"
  2⤵
  - Suspicious behavior: MapViewOfSection
  - System policy modification
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  - Adds Run entry to policy start application
  PID:1920
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Roaming\regasms.exe"
    3⤵
    PID:1648
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:2020

C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Launches Equation Editor
- Loads dropped DLL
- Blacklisted process makes network request
- Suspicious use of WriteProcessMemory
PID:336
- C:\Users\Admin\AppData\Roaming\regasms.exe
  C:\Users\Admin\AppData\Roaming\regasms.exe
  2⤵
  - Suspicious behavior: MapViewOfSection
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  - Executes dropped EXE
  PID:1760
- - C:\Users\Admin\AppData\Roaming\regasms.exe
    C:\Users\Admin\AppData\Roaming\regasms.exe
    3⤵
    - Suspicious behavior: MapViewOfSection
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Executes dropped EXE
    PID:1880

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

1

T1203

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

C:\Users\Admin\AppData\Roaming\2MAB93A4\2MAlogim.jpeg

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C:\Users\Admin\AppData\Roaming\2MAB93A4\2MAlogrf.ini

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C:\Users\Admin\AppData\Roaming\2MAB93A4\2MAlogri.ini

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C:\Users\Admin\AppData\Roaming\2MAB93A4\2MAlogrv.ini

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C:\Users\Admin\AppData\Roaming\regasms.exe

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C:\Users\Admin\AppData\Roaming\regasms.exe

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C:\Users\Admin\AppData\Roaming\regasms.exe

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\Users\Admin\AppData\Roaming\regasms.exe

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\Users\Admin\AppData\Roaming\regasms.exe

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memory/1648-10-0x0000000000000000-mapping.dmp

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memory/1760-2-0x0000000000000000-mapping.dmp

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memory/1880-5-0x0000000000400000-0x000000000042D000-memory.dmp

Filesize
180KB

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memory/1880-6-0x000000000041E2E0-mapping.dmp

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memory/1920-8-0x0000000000000000-mapping.dmp

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memory/1920-12-0x0000000003270000-0x0000000003308000-memory.dmp

Filesize
608KB

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memory/1920-11-0x0000000003000000-0x000000000316F000-memory.dmp

Filesize
1.4MB

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memory/1920-9-0x0000000000250000-0x000000000026C000-memory.dmp

Filesize
112KB

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memory/2020-14-0x000000013FC60000-0x000000013FCF3000-memory.dmp

Filesize
588KB

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memory/2020-13-0x0000000000000000-mapping.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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