formbook | ffc80b59d812eb62c2a8534202477ac2d02cb5e1b6ee53939142e300e31cbb12

Analysis

max time kernel
102s
max time network
106s
platform
windows11-21h2_x64
resource
win11-20250619-en
resource tags

arch:x64arch:x86image:win11-20250619-enlocale:en-usos:windows11-21h2-x64system
submitted
08/10/2025, 16:41

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General

Target
KOREA SHIPPING - KLCSM.exe
Size 1.1MB
Sample251008-t7ee2sy1fs
SHA256 ffc80b59d812eb62c2a8534202477ac2d02cb5e1b6ee53939142e300e31cbb12
MD5 25520e709d159e15862be60146ce0281
SHA1 be25b94a51c352ba9470a6fdc4ed437cfd60e3d3
SHA512 23057bb9746075e16213c8e78f6bfbe859678189973c82e2207305f3d0ef33718a8912975bab785ab088d3083a43e6d10d5e82fffcced6f4de3e2e5c1c6b59da
SSDEEP 24576:utb20pkaCqT5TBWgNQ7athFizI+bEoDZBH1dVJi46A:bVg5tQ7athFx+QodB1d/5
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

discovery formbook rat spyware stealer trojan

Malware Config

Signatures

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

Formbook payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/3316-18-0x0000000000400000-0x0000000000448000-memory.dmp	family_formbook

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4736 set thread context of 3316	4736	KOREA SHIPPING - KLCSM.exe	78

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3572	4736	WerFault.exe	77

System Location Discovery: System Language Discovery 1 TTPs 1 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	KOREA SHIPPING - KLCSM.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4736	KOREA SHIPPING - KLCSM.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe
3316	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4736	KOREA SHIPPING - KLCSM.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4736	KOREA SHIPPING - KLCSM.exe
4736	KOREA SHIPPING - KLCSM.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4736	KOREA SHIPPING - KLCSM.exe
4736	KOREA SHIPPING - KLCSM.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4736 wrote to memory of 3316	4736	KOREA SHIPPING - KLCSM.exe	78
PID 4736 wrote to memory of 3316	4736	KOREA SHIPPING - KLCSM.exe	78
PID 4736 wrote to memory of 3316	4736	KOREA SHIPPING - KLCSM.exe	78
PID 4736 wrote to memory of 3316	4736	KOREA SHIPPING - KLCSM.exe	78

C:\Users\Admin\AppData\Local\Temp\KOREA SHIPPING - KLCSM.exe
"C:\Users\Admin\AppData\Local\Temp\KOREA SHIPPING - KLCSM.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4736
- C:\Windows\SysWOW64\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\KOREA SHIPPING - KLCSM.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3316
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4736 -s 784
  2⤵
  - Program crash
  PID:3572

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4736 -ip 4736
1⤵
PID:4108

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

aut57C6.tmp

Path C:\Users\Admin\AppData\Local\Temp\aut57C6.tmp
Size 287KB
SHA256 f98103ae842e37e95a64488feb93a06de14c12a2fa2ca66c784e445c773fb964
MD5 da1a7c5ddbaefcbc2f63a05564f5afc3
SHA1 d2504c6bae776ea4296741a0310d099dea8efc51
SHA512 ea5a28339f2886c37374944d67a34af2f248adbed4bd4bf932e84d4ddf5a2f330ba0275ee35849c15bde3c6122f2895a4fc6a4591c449bd3328e0c214d1ddaa4
SSDEEP 6144:yUg27DtTmE7/Og3xlRWJn9aEMiVPiC/RsdHS289mSGU6US:yU1z7xTo19RhiC/oLs6US
MD5 SHA1 SHA512 SSDEEP

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memory/3316-15-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/3316-16-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/3316-17-0x0000000001C00000-0x0000000001F56000-memory.dmp

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memory/3316-18-0x0000000000400000-0x0000000000448000-memory.dmp

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memory/4736-14-0x00000000012F0000-0x00000000016F0000-memory.dmp

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