formbook | 8fc52ab78b091873ee351be8fed2c5026d9fdae75ddfe910ea2b179843ca0c3f

Analysis

max time kernel
146s
max time network
139s
platform
windows7_x64
resource
win7
submitted
08/10/2020, 12:18

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General

Target
4b645d82013cf24c3867952cd987bdcd.exe
Size 477KB
Sample201008-vr2c4kn2y6
SHA256 8fc52ab78b091873ee351be8fed2c5026d9fdae75ddfe910ea2b179843ca0c3f
MD5 4b645d82013cf24c3867952cd987bdcd
SHA1 3ea30ce676a15f8eeb3292af36203c909fb21117
SHA512 204fce7eba4ff125165dfea80c0f819ea65989a931501a0eda8714779fd4ef8e575f6fdbcfa2e5738cd0bf4201e60f4d9fd4939740e36a13cb87aa70964f678a
MD5 SHA1 SHA512

Score

10^/10

rat persistence trojan spyware stealer formbook

Malware Config

Signatures

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

Formbook Payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/2044-21-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/2044-22-0x000000000041ED20-mapping.dmp	formbook
behavioral1/memory/696-24-0x0000000000000000-mapping.dmp	formbook

Executes dropped EXE 2 IoCs

pid	Process
1936	jbsge.exe
2044	AddInProcess32.exe

Loads dropped DLL 5 IoCs

pid	Process
1044	4b645d82013cf24c3867952cd987bdcd.exe
1044	4b645d82013cf24c3867952cd987bdcd.exe
1936	jbsge.exe
1936	jbsge.exe
1936	jbsge.exe

Adds 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\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\nsgiyh = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\jbsge.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1936 set thread context of 2044	1936	jbsge.exe	32
PID 2044 set thread context of 1256	2044	AddInProcess32.exe	20
PID 696 set thread context of 1256	696	cmstp.exe	20

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
1044	4b645d82013cf24c3867952cd987bdcd.exe
1044	4b645d82013cf24c3867952cd987bdcd.exe
1936	jbsge.exe
2044	AddInProcess32.exe
2044	AddInProcess32.exe
696	cmstp.exe
696	cmstp.exe
696	cmstp.exe
696	cmstp.exe
696	cmstp.exe
696	cmstp.exe
696	cmstp.exe
696	cmstp.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2044	AddInProcess32.exe
2044	AddInProcess32.exe
2044	AddInProcess32.exe
696	cmstp.exe
696	cmstp.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1044	4b645d82013cf24c3867952cd987bdcd.exe
Token: SeDebugPrivilege	1936	jbsge.exe
Token: SeDebugPrivilege	2044	AddInProcess32.exe
Token: SeDebugPrivilege	696	cmstp.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1044 wrote to memory of 1856	1044	4b645d82013cf24c3867952cd987bdcd.exe	28
PID 1044 wrote to memory of 1856	1044	4b645d82013cf24c3867952cd987bdcd.exe	28
PID 1044 wrote to memory of 1856	1044	4b645d82013cf24c3867952cd987bdcd.exe	28
PID 1044 wrote to memory of 1856	1044	4b645d82013cf24c3867952cd987bdcd.exe	28
PID 1856 wrote to memory of 1848	1856	cmd.exe	30
PID 1856 wrote to memory of 1848	1856	cmd.exe	30
PID 1856 wrote to memory of 1848	1856	cmd.exe	30
PID 1856 wrote to memory of 1848	1856	cmd.exe	30
PID 1044 wrote to memory of 1936	1044	4b645d82013cf24c3867952cd987bdcd.exe	31
PID 1044 wrote to memory of 1936	1044	4b645d82013cf24c3867952cd987bdcd.exe	31
PID 1044 wrote to memory of 1936	1044	4b645d82013cf24c3867952cd987bdcd.exe	31
PID 1044 wrote to memory of 1936	1044	4b645d82013cf24c3867952cd987bdcd.exe	31
PID 1936 wrote to memory of 2044	1936	jbsge.exe	32
PID 1936 wrote to memory of 2044	1936	jbsge.exe	32
PID 1936 wrote to memory of 2044	1936	jbsge.exe	32
PID 1936 wrote to memory of 2044	1936	jbsge.exe	32
PID 1936 wrote to memory of 2044	1936	jbsge.exe	32
PID 1936 wrote to memory of 2044	1936	jbsge.exe	32
PID 1936 wrote to memory of 2044	1936	jbsge.exe	32
PID 1256 wrote to memory of 696	1256	Explorer.EXE	33
PID 1256 wrote to memory of 696	1256	Explorer.EXE	33
PID 1256 wrote to memory of 696	1256	Explorer.EXE	33
PID 1256 wrote to memory of 696	1256	Explorer.EXE	33
PID 1256 wrote to memory of 696	1256	Explorer.EXE	33
PID 1256 wrote to memory of 696	1256	Explorer.EXE	33
PID 1256 wrote to memory of 696	1256	Explorer.EXE	33
PID 696 wrote to memory of 576	696	cmstp.exe	34
PID 696 wrote to memory of 576	696	cmstp.exe	34
PID 696 wrote to memory of 576	696	cmstp.exe	34
PID 696 wrote to memory of 576	696	cmstp.exe	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1256
- C:\Users\Admin\AppData\Local\Temp\4b645d82013cf24c3867952cd987bdcd.exe
  "C:\Users\Admin\AppData\Local\Temp\4b645d82013cf24c3867952cd987bdcd.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1044
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v nsgiyh /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\jbsge.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1856
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v nsgiyh /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\jbsge.exe"
      4⤵
      Adds Run key to start application
      PID:1848
- - C:\Users\Admin\jbsge.exe
    "C:\Users\Admin\jbsge.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1936
  - - 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:2044
- C:\Windows\SysWOW64\cmstp.exe
  "C:\Windows\SysWOW64\cmstp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:696
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
    3⤵
    PID:576

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/696-27-0x0000000003120000-0x00000000032AA000-memory.dmp

Download

memory/696-25-0x00000000002D0000-0x00000000002E8000-memory.dmp

Download

memory/1044-1-0x0000000000DD0000-0x0000000000DD1000-memory.dmp

Download

memory/1044-0-0x0000000073A20000-0x000000007410E000-memory.dmp

Download

memory/1044-3-0x00000000009F0000-0x0000000000A27000-memory.dmp

Download

memory/1936-11-0x0000000073A20000-0x000000007410E000-memory.dmp

Download

memory/1936-17-0x0000000000690000-0x00000000006A6000-memory.dmp

Download

memory/1936-12-0x0000000000C30000-0x0000000000C31000-memory.dmp

Download

memory/2044-21-0x0000000000400000-0x000000000042E000-memory.dmp

Download