formbook | 668ee3482b147021e6ad219fd296158a49855238d0faf3a937a59fcc3e991a2b

General

Target

Halkbank.exe
Size

732KB
MD5

8e6067fd802c5cac596f7bf91bd7e255
SHA1

d25e4cb1263bf84e46851c819886393a645cb1a6
SHA256

761a2e999afac422bbf2879ffdbd2aea8f9adc8ced10e640d7ff0e295e5ccd97
SHA512

cb4e0e838b83fb38fbdd3665b042a03c215ba6f02bf06e7a530195b482b7baf70ea8c14b06b92e9a5ef5fdf604b1fd5f3f8681f9b42afa9531b51e464afbc519
SSDEEP

12288:AujjPHHwHmUvKBkYdLvqniPB9YXo/7hGrlzV8Pb0EDzbrDcPYD1PehJOE0H9PuZ/:AMPwHTvHYdLyMMXojhGxUb0EXw+WhJOq

Score

10^/10

formbook dlwk discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

dlwk

Decoy

universitypinesseniorliving.com

mtcy0852.com

abslevha.com

breedersbatch.com

longlivegenx.com

yibaogy.com

sex8e.com

luxsot.com

arizonafinevioins.com

lalabusha.xyz

everycases.net

unhealthyisunweathly.com

anchorphonemounts.com

teachuswell.com

theshadedco.com

wallopchain.com

balitourexplore.com

resctub.com

freshlyfadedapparel.com

betamartgroceries.com

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/1388-12-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/1388-17-0x0000000000400000-0x000000000042E000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 5112 set thread context of 1388	5112	Halkbank.exe	102
PID 1388 set thread context of 3516	1388	Halkbank.exe	56
PID 3456 set thread context of 3516	3456	rundll32.exe	56

System Location Discovery: System Language Discovery 1 TTPs 3 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Halkbank.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious behavior: EnumeratesProcesses 36 IoCs

pid	Process
1388	Halkbank.exe
1388	Halkbank.exe
1388	Halkbank.exe
1388	Halkbank.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe
3456	rundll32.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
1388	Halkbank.exe
1388	Halkbank.exe
1388	Halkbank.exe
3456	rundll32.exe
3456	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1388	Halkbank.exe
Token: SeDebugPrivilege	3456	rundll32.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5112 wrote to memory of 1388	5112	Halkbank.exe	102
PID 5112 wrote to memory of 1388	5112	Halkbank.exe	102
PID 5112 wrote to memory of 1388	5112	Halkbank.exe	102
PID 5112 wrote to memory of 1388	5112	Halkbank.exe	102
PID 5112 wrote to memory of 1388	5112	Halkbank.exe	102
PID 5112 wrote to memory of 1388	5112	Halkbank.exe	102
PID 3516 wrote to memory of 3456	3516	Explorer.EXE	103
PID 3516 wrote to memory of 3456	3516	Explorer.EXE	103
PID 3516 wrote to memory of 3456	3516	Explorer.EXE	103
PID 3456 wrote to memory of 3996	3456	rundll32.exe	104
PID 3456 wrote to memory of 3996	3456	rundll32.exe	104
PID 3456 wrote to memory of 3996	3456	rundll32.exe	104

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3516
- C:\Users\Admin\AppData\Local\Temp\Halkbank.exe
  "C:\Users\Admin\AppData\Local\Temp\Halkbank.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5112
- - C:\Users\Admin\AppData\Local\Temp\Halkbank.exe
    "C:\Users\Admin\AppData\Local\Temp\Halkbank.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:1388
- 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:3456
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\Halkbank.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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/1388-12-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1388-17-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1388-18-0x0000000001610000-0x0000000001624000-memory.dmp

Filesize
80KB

Download
memory/1388-15-0x00000000016A0000-0x00000000019EA000-memory.dmp

Filesize
3.3MB

Download
memory/3456-20-0x0000000000BF0000-0x0000000000C04000-memory.dmp

Filesize
80KB

Download
memory/3456-22-0x0000000000BF0000-0x0000000000C04000-memory.dmp

Filesize
80KB

Download
memory/3516-19-0x00000000085E0000-0x000000000871E000-memory.dmp

Filesize
1.2MB

Download
memory/3516-30-0x0000000002CC0000-0x0000000002D59000-memory.dmp

Filesize
612KB

Download
memory/3516-28-0x0000000002CC0000-0x0000000002D59000-memory.dmp

Filesize
612KB

Download
memory/3516-27-0x0000000002CC0000-0x0000000002D59000-memory.dmp

Filesize
612KB

Download
memory/3516-23-0x00000000085E0000-0x000000000871E000-memory.dmp

Filesize
1.2MB

Download
memory/5112-9-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/5112-4-0x0000000004F40000-0x0000000004FDC000-memory.dmp

Filesize
624KB

Download
memory/5112-14-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/5112-3-0x0000000004DB0000-0x0000000004E42000-memory.dmp

Filesize
584KB

Download
memory/5112-2-0x0000000005450000-0x00000000059F4000-memory.dmp

Filesize
5.6MB

Download
memory/5112-1-0x0000000000310000-0x00000000003CC000-memory.dmp

Filesize
752KB

Download
memory/5112-11-0x0000000006940000-0x00000000069A4000-memory.dmp

Filesize
400KB

Download
memory/5112-0-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/5112-10-0x00000000067A0000-0x000000000683C000-memory.dmp

Filesize
624KB

Download
memory/5112-5-0x0000000074770000-0x0000000074F20000-memory.dmp

Filesize
7.7MB

Download
memory/5112-8-0x000000007477E000-0x000000007477F000-memory.dmp

Filesize
4KB

Download
memory/5112-7-0x0000000005000000-0x0000000005016000-memory.dmp

Filesize
88KB

Download
memory/5112-6-0x0000000004E50000-0x0000000004E5A000-memory.dmp

Filesize
40KB

Download

Analysis

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