formbook | d6cb94e803a570db4987655ae100b9dcca4ca11d45c7a0b9ab004f494855b1fb

General

Target

dekont.pdf.exe
Size

689KB
MD5

e5030819a8f2a25db1d44af66e00f397
SHA1

af2a32d408423b80f5bc659f708ff373947f633c
SHA256

d6cb94e803a570db4987655ae100b9dcca4ca11d45c7a0b9ab004f494855b1fb
SHA512

f7694edf91dbad898f73338eb9ce1166e3fec240f0bd700d97ad8cc9455c15805e36d73d607976185fa8559b5b158490fc82fd6fbd73cdf4ecccc5f80e9e2138
SSDEEP

12288:1bJbQWSL/h6HWSpws2t0dAWT9ymEtboOCJVMH:dJbQxLQHWSph2t0OWTgmENoOCJV

Score

10^/10

formbook m17o discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

m17o

Decoy

kzqh72.top

arket-obybqq.xyz

afechoice.click

ote-knplpa.xyz

aqgpie.xyz

orker-ornp.xyz

he-beds321.today

ut-nlvv.xyz

31231827.xyz

milymariephotography.net

wquqo.click

veu-where.xyz

mjcpo-pick.xyz

yself-lpnbdl.xyz

austoowagosha.net

ive-wgag.xyz

lay-drift-palace.xyz

old-vubgv.xyz

ideo-shooting-courses.today

ntendsisaiasjazmin.shop

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

resource	yara_rule
behavioral1/memory/2980-14-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2980-18-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2696-25-0x0000000000080000-0x00000000000AF000-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

pid	Process
2792	powershell.exe

Deletes itself 1 IoCs

pid	Process
2744	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2900 set thread context of 2980	2900	dekont.pdf.exe	33
PID 2980 set thread context of 1180	2980	dekont.pdf.exe	21
PID 2696 set thread context of 1180	2696	mstsc.exe	21

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 4 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mstsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dekont.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2900	dekont.pdf.exe
2900	dekont.pdf.exe
2980	dekont.pdf.exe
2980	dekont.pdf.exe
2792	powershell.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe
2696	mstsc.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2980	dekont.pdf.exe
2980	dekont.pdf.exe
2980	dekont.pdf.exe
2696	mstsc.exe
2696	mstsc.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2900	dekont.pdf.exe
Token: SeDebugPrivilege	2980	dekont.pdf.exe
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeDebugPrivilege	2696	mstsc.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 2792	2900	dekont.pdf.exe	30
PID 2900 wrote to memory of 2792	2900	dekont.pdf.exe	30
PID 2900 wrote to memory of 2792	2900	dekont.pdf.exe	30
PID 2900 wrote to memory of 2792	2900	dekont.pdf.exe	30
PID 2900 wrote to memory of 2892	2900	dekont.pdf.exe	32
PID 2900 wrote to memory of 2892	2900	dekont.pdf.exe	32
PID 2900 wrote to memory of 2892	2900	dekont.pdf.exe	32
PID 2900 wrote to memory of 2892	2900	dekont.pdf.exe	32
PID 2900 wrote to memory of 2980	2900	dekont.pdf.exe	33
PID 2900 wrote to memory of 2980	2900	dekont.pdf.exe	33
PID 2900 wrote to memory of 2980	2900	dekont.pdf.exe	33
PID 2900 wrote to memory of 2980	2900	dekont.pdf.exe	33
PID 2900 wrote to memory of 2980	2900	dekont.pdf.exe	33
PID 2900 wrote to memory of 2980	2900	dekont.pdf.exe	33
PID 2900 wrote to memory of 2980	2900	dekont.pdf.exe	33
PID 1180 wrote to memory of 2696	1180	Explorer.EXE	34
PID 1180 wrote to memory of 2696	1180	Explorer.EXE	34
PID 1180 wrote to memory of 2696	1180	Explorer.EXE	34
PID 1180 wrote to memory of 2696	1180	Explorer.EXE	34
PID 2696 wrote to memory of 2744	2696	mstsc.exe	35
PID 2696 wrote to memory of 2744	2696	mstsc.exe	35
PID 2696 wrote to memory of 2744	2696	mstsc.exe	35
PID 2696 wrote to memory of 2744	2696	mstsc.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1180
- C:\Users\Admin\AppData\Local\Temp\dekont.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\dekont.pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2900
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\dekont.pdf.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2792
- - C:\Users\Admin\AppData\Local\Temp\dekont.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\dekont.pdf.exe"
    3⤵
    PID:2892
- - C:\Users\Admin\AppData\Local\Temp\dekont.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\dekont.pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2980
- C:\Windows\SysWOW64\mstsc.exe
  "C:\Windows\SysWOW64\mstsc.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:2696
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\dekont.pdf.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1180-21-0x00000000043A0000-0x000000000450B000-memory.dmp

Filesize
1.4MB

Download
memory/1180-28-0x00000000043A0000-0x000000000450B000-memory.dmp

Filesize
1.4MB

Download
memory/1180-26-0x0000000003740000-0x0000000003840000-memory.dmp

Filesize
1024KB

Download
memory/2696-25-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/2696-24-0x0000000000A20000-0x0000000000B24000-memory.dmp

Filesize
1.0MB

Download
memory/2900-5-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2900-0-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

Filesize
4KB

Download
memory/2900-1-0x00000000013A0000-0x0000000001452000-memory.dmp

Filesize
712KB

Download
memory/2900-2-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2900-6-0x0000000005030000-0x00000000050AA000-memory.dmp

Filesize
488KB

Download
memory/2900-3-0x00000000008A0000-0x00000000008B2000-memory.dmp

Filesize
72KB

Download
memory/2900-15-0x0000000074B20000-0x000000007520E000-memory.dmp

Filesize
6.9MB

Download
memory/2900-4-0x0000000074B2E000-0x0000000074B2F000-memory.dmp

Filesize
4KB

Download
memory/2980-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2980-18-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2980-19-0x0000000000180000-0x0000000000195000-memory.dmp

Filesize
84KB

Download
memory/2980-16-0x0000000000A60000-0x0000000000D63000-memory.dmp

Filesize
3.0MB

Download
memory/2980-9-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2980-14-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2980-7-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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