formbook | ec66f68731b1c186ac1c87c2520106f85e2a25951303014b9163f51c476846be

Analysis

max time kernel
149s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-10-2024 12:31

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General

Target

z83obqahfw.exe
Size

636KB
MD5

946ddca6df1a4ad1bab2b6166dbd516d
SHA1

7362693e6ac7990c7456a47c09a1e7463d855e26
SHA256

ec66f68731b1c186ac1c87c2520106f85e2a25951303014b9163f51c476846be
SHA512

b8ebaa3b5aca238c4e7a4e2486b3d017d044fab1a3eb9e65c3e032751386909117b74a9e48bd5f7969c1fc39c5301d623617ca8d128a8e702163878dc738a43d
SSDEEP

12288:DzaDPw1Qk89Tmyx6Dz1Xy6ICOHdhWMTqJFl/UYp1pinxVy/56:DWLw9gTFg3MYsdhM1cYp1piw56

Score

10^/10

formbook dn13 discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

dn13

Decoy

5q53s.top

f9813.top

ysticsmoke.net

ignorysingeysquints.cfd

yncsignature.live

svp-their.xyz

outya.xyz

wlkflwef3sf2wf.top

etterjugfetkaril.cfd

p9eh2s99b5.top

400108iqlnnqi219.top

ynsu-condition.xyz

ndividual-bfiaen.xyz

anceibizamagazine.net

itrussips.live

orkcubefood.xyz

lindsandfurnishings.shop

ajwmid.top

pigramescentfeatous.shop

mbvcv56789.click

Signatures

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

Formbook payload 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1896-34-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/1896-41-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral2/memory/3664-75-0x0000000000830000-0x000000000085F000-memory.dmp	formbook

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

Processes:

powershell.exe

pid	Process
884	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

z83obqahfw.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	z83obqahfw.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

z83obqahfw.exez83obqahfw.exerundll32.exe

description	pid	Process	procid_target
PID 2040 set thread context of 1896	2040	z83obqahfw.exe	106
PID 1896 set thread context of 3472	1896	z83obqahfw.exe	56
PID 3664 set thread context of 3472	3664	rundll32.exe	56

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

z83obqahfw.exepowershell.exeschtasks.exerundll32.execmd.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	z83obqahfw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 2 IoCs

Processes:

Explorer.EXE

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	Explorer.EXE
Key created	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	Explorer.EXE

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exe

pid	Process
1528	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

z83obqahfw.exepowershell.exez83obqahfw.exerundll32.exe

pid	Process
2040	z83obqahfw.exe
2040	z83obqahfw.exe
2040	z83obqahfw.exe
2040	z83obqahfw.exe
884	powershell.exe
884	powershell.exe
2040	z83obqahfw.exe
2040	z83obqahfw.exe
2040	z83obqahfw.exe
2040	z83obqahfw.exe
1896	z83obqahfw.exe
1896	z83obqahfw.exe
884	powershell.exe
1896	z83obqahfw.exe
1896	z83obqahfw.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe
3664	rundll32.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

z83obqahfw.exerundll32.exe

pid	Process
1896	z83obqahfw.exe
1896	z83obqahfw.exe
1896	z83obqahfw.exe
3664	rundll32.exe
3664	rundll32.exe

Suspicious use of AdjustPrivilegeToken 18 IoCs

Processes:

z83obqahfw.exepowershell.exez83obqahfw.exerundll32.exeExplorer.EXE

description	pid	Process
Token: SeDebugPrivilege	2040	z83obqahfw.exe
Token: SeDebugPrivilege	884	powershell.exe
Token: SeDebugPrivilege	1896	z83obqahfw.exe
Token: SeDebugPrivilege	3664	rundll32.exe
Token: SeShutdownPrivilege	3472	Explorer.EXE
Token: SeCreatePagefilePrivilege	3472	Explorer.EXE
Token: SeShutdownPrivilege	3472	Explorer.EXE
Token: SeCreatePagefilePrivilege	3472	Explorer.EXE
Token: SeShutdownPrivilege	3472	Explorer.EXE
Token: SeCreatePagefilePrivilege	3472	Explorer.EXE
Token: SeShutdownPrivilege	3472	Explorer.EXE
Token: SeCreatePagefilePrivilege	3472	Explorer.EXE
Token: SeShutdownPrivilege	3472	Explorer.EXE
Token: SeCreatePagefilePrivilege	3472	Explorer.EXE
Token: SeShutdownPrivilege	3472	Explorer.EXE
Token: SeCreatePagefilePrivilege	3472	Explorer.EXE
Token: SeShutdownPrivilege	3472	Explorer.EXE
Token: SeCreatePagefilePrivilege	3472	Explorer.EXE

Suspicious use of UnmapMainImage 1 IoCs

Processes:

Explorer.EXE

pid	Process
3472	Explorer.EXE

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

z83obqahfw.exeExplorer.EXErundll32.exe

description	pid	Process	procid_target
PID 2040 wrote to memory of 884	2040	z83obqahfw.exe	101
PID 2040 wrote to memory of 884	2040	z83obqahfw.exe	101
PID 2040 wrote to memory of 884	2040	z83obqahfw.exe	101
PID 2040 wrote to memory of 1528	2040	z83obqahfw.exe	103
PID 2040 wrote to memory of 1528	2040	z83obqahfw.exe	103
PID 2040 wrote to memory of 1528	2040	z83obqahfw.exe	103
PID 2040 wrote to memory of 2364	2040	z83obqahfw.exe	105
PID 2040 wrote to memory of 2364	2040	z83obqahfw.exe	105
PID 2040 wrote to memory of 2364	2040	z83obqahfw.exe	105
PID 2040 wrote to memory of 1896	2040	z83obqahfw.exe	106
PID 2040 wrote to memory of 1896	2040	z83obqahfw.exe	106
PID 2040 wrote to memory of 1896	2040	z83obqahfw.exe	106
PID 2040 wrote to memory of 1896	2040	z83obqahfw.exe	106
PID 2040 wrote to memory of 1896	2040	z83obqahfw.exe	106
PID 2040 wrote to memory of 1896	2040	z83obqahfw.exe	106
PID 3472 wrote to memory of 3664	3472	Explorer.EXE	107
PID 3472 wrote to memory of 3664	3472	Explorer.EXE	107
PID 3472 wrote to memory of 3664	3472	Explorer.EXE	107
PID 3664 wrote to memory of 3528	3664	rundll32.exe	108
PID 3664 wrote to memory of 3528	3664	rundll32.exe	108
PID 3664 wrote to memory of 3528	3664	rundll32.exe	108

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3472
- C:\Users\Admin\AppData\Local\Temp\z83obqahfw.exe
  "C:\Users\Admin\AppData\Local\Temp\z83obqahfw.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2040
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ZXTRzzwt.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:884
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZXTRzzwt" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE34.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1528
- - C:\Users\Admin\AppData\Local\Temp\z83obqahfw.exe
    "C:\Users\Admin\AppData\Local\Temp\z83obqahfw.exe"
    3⤵
    PID:2364
- - C:\Users\Admin\AppData\Local\Temp\z83obqahfw.exe
    "C:\Users\Admin\AppData\Local\Temp\z83obqahfw.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1896
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\SysWOW64\rundll32.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3664
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\z83obqahfw.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5tw0rff3.oqv.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE34.tmp

Filesize
1KB

MD5
88fc226a24faf5b62bc5ba7dbbec497e

SHA1
4ce0aecc90e59ee29b66be5a2e9558077f31a052

SHA256
6747ebff220daf8629942fd7b12b559e94457064cf829ebf6e4ad6807a6ba50c

SHA512
df43d60153ca1377214eebb12f42ac8ad027164681e7daf8ede8a5f388ee48f8b9d21ad85328ddadaf082c0ad90ea949a6c933d58c7645e73cb6de7a40d6e6b7

Download Submit
memory/884-39-0x0000000006000000-0x000000000604C000-memory.dmp

Filesize
304KB

Download
memory/884-64-0x0000000007510000-0x0000000007521000-memory.dmp

Filesize
68KB

Download
memory/884-15-0x00000000026C0000-0x00000000026F6000-memory.dmp

Filesize
216KB

Download
memory/884-74-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/884-71-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/884-70-0x0000000007630000-0x0000000007638000-memory.dmp

Filesize
32KB

Download
memory/884-69-0x0000000007650000-0x000000000766A000-memory.dmp

Filesize
104KB

Download
memory/884-68-0x0000000007550000-0x0000000007564000-memory.dmp

Filesize
80KB

Download
memory/884-67-0x0000000007540000-0x000000000754E000-memory.dmp

Filesize
56KB

Download
memory/884-20-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/884-22-0x0000000005850000-0x00000000058B6000-memory.dmp

Filesize
408KB

Download
memory/884-16-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/884-23-0x00000000058C0000-0x0000000005926000-memory.dmp

Filesize
408KB

Download
memory/884-17-0x00000000051B0000-0x00000000057D8000-memory.dmp

Filesize
6.2MB

Download
memory/884-33-0x0000000005BE0000-0x0000000005F34000-memory.dmp

Filesize
3.3MB

Download
memory/884-45-0x00000000065B0000-0x00000000065E2000-memory.dmp

Filesize
200KB

Download
memory/884-63-0x0000000007590000-0x0000000007626000-memory.dmp

Filesize
600KB

Download
memory/884-62-0x0000000007380000-0x000000000738A000-memory.dmp

Filesize
40KB

Download
memory/884-61-0x0000000007310000-0x000000000732A000-memory.dmp

Filesize
104KB

Download
memory/884-60-0x0000000007950000-0x0000000007FCA000-memory.dmp

Filesize
6.5MB

Download
memory/884-58-0x00000000071D0000-0x0000000007273000-memory.dmp

Filesize
652KB

Download
memory/884-59-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/884-56-0x00000000071B0000-0x00000000071CE000-memory.dmp

Filesize
120KB

Download
memory/884-38-0x0000000005FC0000-0x0000000005FDE000-memory.dmp

Filesize
120KB

Download
memory/884-18-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/884-57-0x0000000004B70000-0x0000000004B80000-memory.dmp

Filesize
64KB

Download
memory/884-21-0x0000000005130000-0x0000000005152000-memory.dmp

Filesize
136KB

Download
memory/884-46-0x0000000075590000-0x00000000755DC000-memory.dmp

Filesize
304KB

Download
memory/884-44-0x000000007F170000-0x000000007F180000-memory.dmp

Filesize
64KB

Download
memory/1896-34-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1896-42-0x00000000015C0000-0x00000000015D4000-memory.dmp

Filesize
80KB

Download
memory/1896-41-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/1896-37-0x00000000016D0000-0x0000000001A1A000-memory.dmp

Filesize
3.3MB

Download
memory/2040-2-0x0000000005B40000-0x00000000060E4000-memory.dmp

Filesize
5.6MB

Download
memory/2040-5-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/2040-9-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/2040-8-0x0000000074D0E000-0x0000000074D0F000-memory.dmp

Filesize
4KB

Download
memory/2040-7-0x0000000006A10000-0x0000000006A2E000-memory.dmp

Filesize
120KB

Download
memory/2040-6-0x0000000005900000-0x000000000599C000-memory.dmp

Filesize
624KB

Download
memory/2040-36-0x0000000074D00000-0x00000000754B0000-memory.dmp

Filesize
7.7MB

Download
memory/2040-0-0x0000000074D0E000-0x0000000074D0F000-memory.dmp

Filesize
4KB

Download
memory/2040-1-0x0000000000B60000-0x0000000000C06000-memory.dmp

Filesize
664KB

Download
memory/2040-10-0x0000000002E80000-0x0000000002EF6000-memory.dmp

Filesize
472KB

Download
memory/2040-4-0x0000000005610000-0x000000000561A000-memory.dmp

Filesize
40KB

Download
memory/2040-3-0x0000000005630000-0x00000000056C2000-memory.dmp

Filesize
584KB

Download
memory/3472-43-0x00000000046B0000-0x0000000004823000-memory.dmp

Filesize
1.4MB

Download
memory/3472-79-0x0000000008A80000-0x0000000008BAD000-memory.dmp

Filesize
1.2MB

Download
memory/3664-66-0x0000000000EB0000-0x0000000000EC4000-memory.dmp

Filesize
80KB

Download
memory/3664-65-0x0000000000EB0000-0x0000000000EC4000-memory.dmp

Filesize
80KB

Download
memory/3664-75-0x0000000000830000-0x000000000085F000-memory.dmp

Filesize
188KB

Download