formbook | 6a02b032ec9f2ab8fd607270afb20b06143ad445d32fb2e3eb1ebf1fbccef951

General

Target

$PLUGINSDIR/cwhxmitph.dll
Size

178KB
MD5

e168e018ae7b50b12ccbf621f92a8d80
SHA1

f58c9aca0a2d1f9598fab015124ce3b7b90b973e
SHA256

b13b4eef285efc06e845504a1daec9949d4182c34a9a1737e65c87eba4b04a7a
SHA512

8e4e3b74f4ce9b2a4569d291c23763c3785f3582c199c3be75f462cc4cc01733b287161310733d5cf8c6301cfe25bbc28ebefacb4b944d6acb19fd2f04219111
SSDEEP

3072:L5qpSYH/rb0G1zCObTntqxM5p4mLZAR8fWzP:6HeOHntqxM5Sm/QP

Score

10^/10

formbook h2b0 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

h2b0

Decoy

coastmortgageloans.com

sejt.xyz

krisandmeigeni.com

personalbias.com

cubana-pablo.com

nipahvax.com

cxyzjsrc.com

trttanks.com

yoko-by.com

sbyidn.net

metainstagram.faith

katsuyatoken.com

trustminingfx.trade

xsightvideos.online

localemergencies.com

2ab0.com

idahofloat.com

ourdogdream.com

thebestmediaguy.com

forthesaltysouls.com

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
behavioral3/memory/2604-1-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral3/memory/2604-4-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral3/memory/3028-10-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2348 set thread context of 2604	2348	rundll32.exe	30
PID 2604 set thread context of 1264	2604	rundll32.exe	20
PID 3028 set thread context of 1264	3028	chkdsk.exe	20

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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	chkdsk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	chkdsk.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2604	rundll32.exe
2604	rundll32.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe
3028	chkdsk.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2604	rundll32.exe
2604	rundll32.exe
2604	rundll32.exe
3028	chkdsk.exe
3028	chkdsk.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2604	rundll32.exe
Token: SeDebugPrivilege	3028	chkdsk.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 2348	2200	rundll32.exe	29
PID 2200 wrote to memory of 2348	2200	rundll32.exe	29
PID 2200 wrote to memory of 2348	2200	rundll32.exe	29
PID 2200 wrote to memory of 2348	2200	rundll32.exe	29
PID 2200 wrote to memory of 2348	2200	rundll32.exe	29
PID 2200 wrote to memory of 2348	2200	rundll32.exe	29
PID 2200 wrote to memory of 2348	2200	rundll32.exe	29
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 2348 wrote to memory of 2604	2348	rundll32.exe	30
PID 1264 wrote to memory of 3028	1264	Explorer.EXE	31
PID 1264 wrote to memory of 3028	1264	Explorer.EXE	31
PID 1264 wrote to memory of 3028	1264	Explorer.EXE	31
PID 1264 wrote to memory of 3028	1264	Explorer.EXE	31
PID 3028 wrote to memory of 2236	3028	chkdsk.exe	32
PID 3028 wrote to memory of 2236	3028	chkdsk.exe	32
PID 3028 wrote to memory of 2236	3028	chkdsk.exe	32
PID 3028 wrote to memory of 2236	3028	chkdsk.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1264
- C:\Windows\system32\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\cwhxmitph.dll,#1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2200
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\cwhxmitph.dll,#1
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2348
  - - C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\cwhxmitph.dll,#1
      4⤵
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2604
- C:\Windows\SysWOW64\chkdsk.exe
  "C:\Windows\SysWOW64\chkdsk.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3028
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2236

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

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/1264-6-0x00000000003C0000-0x00000000004C0000-memory.dmp

Filesize
1024KB

Download
memory/1264-7-0x0000000005E50000-0x0000000005F13000-memory.dmp

Filesize
780KB

Download
memory/1264-11-0x0000000005E50000-0x0000000005F13000-memory.dmp

Filesize
780KB

Download
memory/1264-13-0x0000000000010000-0x0000000000020000-memory.dmp

Filesize
64KB

Download
memory/2348-0-0x0000000074F7A000-0x0000000074F7C000-memory.dmp

Filesize
8KB

Download
memory/2604-1-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2604-2-0x0000000000B90000-0x0000000000E93000-memory.dmp

Filesize
3.0MB

Download
memory/2604-5-0x00000000001D0000-0x00000000001E5000-memory.dmp

Filesize
84KB

Download
memory/2604-4-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3028-8-0x0000000000DF0000-0x0000000000DF7000-memory.dmp

Filesize
28KB

Download
memory/3028-9-0x0000000000DF0000-0x0000000000DF7000-memory.dmp

Filesize
28KB

Download
memory/3028-10-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download

Analysis

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