formbook | 29fe01db6dea93e7ea23988d78444e838ff8ca2b56f406844cb0aa2d31b2563d

General

Target

PROJECT FEJ-1601.exe
Size

394KB
MD5

212f0a0a7237ab09c82f6153361ac1b0
SHA1

1b84fff6041a1700f34c80a6e737e8e8c80d5770
SHA256

40bec545f9b01c4438a75cb03d902cc70c65ce8ecf90ecb1fb88aeb00b2c92cc
SHA512

232d6573a5801af940f13f97adae7f6d7a7cd38a3b61b190437f666387508db5668df77db980de3b911e2dab806587f9a486ccab5887a50f27efabb538ade348
SSDEEP

12288:U1zgVlrWHFZED24Ug/Q50b4Qhw+hjcnUgtICxs3IEeC:U1zgVlrWHwi4+5Y4WzhjcnUgXpE

Score

10^/10

formbook ykj discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

ykj

Decoy

polovnitelefoni.net

cateless.com

newbeginnings.club

quanghoagroup.com

pcbet0.com

normal.computer

yoinkyoink.com

lahorekabob.com

charnal-voices.com

hotsleepspot.com

thekashmirfabrics.com

upholsteryormondbeach.com

caramel-lefilm.com

pkitales.com

truancyclub.com

susanmathason.com

sweetlimenail.com

vaaudiotechnic.site

edem-agency.com

rakkonoteineinakurashi.com

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/4536-12-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral2/memory/4536-17-0x0000000000400000-0x000000000042E000-memory.dmp	formbook

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4428 set thread context of 4536	4428	PROJECT FEJ-1601.exe	99
PID 4536 set thread context of 3472	4536	PROJECT FEJ-1601.exe	56
PID 1172 set thread context of 3472	1172	cmmon32.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	PROJECT FEJ-1601.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmmon32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	Explorer.EXE
Key created	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	Explorer.EXE

Suspicious behavior: EnumeratesProcesses 39 IoCs

pid	Process
4428	PROJECT FEJ-1601.exe
4428	PROJECT FEJ-1601.exe
4428	PROJECT FEJ-1601.exe
4536	PROJECT FEJ-1601.exe
4536	PROJECT FEJ-1601.exe
4536	PROJECT FEJ-1601.exe
4536	PROJECT FEJ-1601.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe
1172	cmmon32.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
4536	PROJECT FEJ-1601.exe
4536	PROJECT FEJ-1601.exe
4536	PROJECT FEJ-1601.exe
1172	cmmon32.exe
1172	cmmon32.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4428	PROJECT FEJ-1601.exe
Token: SeDebugPrivilege	4536	PROJECT FEJ-1601.exe
Token: SeDebugPrivilege	1172	cmmon32.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

pid	Process
3472	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4428 wrote to memory of 4500	4428	PROJECT FEJ-1601.exe	98
PID 4428 wrote to memory of 4500	4428	PROJECT FEJ-1601.exe	98
PID 4428 wrote to memory of 4500	4428	PROJECT FEJ-1601.exe	98
PID 4428 wrote to memory of 4536	4428	PROJECT FEJ-1601.exe	99
PID 4428 wrote to memory of 4536	4428	PROJECT FEJ-1601.exe	99
PID 4428 wrote to memory of 4536	4428	PROJECT FEJ-1601.exe	99
PID 4428 wrote to memory of 4536	4428	PROJECT FEJ-1601.exe	99
PID 4428 wrote to memory of 4536	4428	PROJECT FEJ-1601.exe	99
PID 4428 wrote to memory of 4536	4428	PROJECT FEJ-1601.exe	99
PID 3472 wrote to memory of 1172	3472	Explorer.EXE	100
PID 3472 wrote to memory of 1172	3472	Explorer.EXE	100
PID 3472 wrote to memory of 1172	3472	Explorer.EXE	100
PID 1172 wrote to memory of 3760	1172	cmmon32.exe	101
PID 1172 wrote to memory of 3760	1172	cmmon32.exe	101
PID 1172 wrote to memory of 3760	1172	cmmon32.exe	101

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\PROJECT FEJ-1601.exe
  "C:\Users\Admin\AppData\Local\Temp\PROJECT FEJ-1601.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4428
- - C:\Users\Admin\AppData\Local\Temp\PROJECT FEJ-1601.exe
    "C:\Users\Admin\AppData\Local\Temp\PROJECT FEJ-1601.exe"
    3⤵
    PID:4500
- - C:\Users\Admin\AppData\Local\Temp\PROJECT FEJ-1601.exe
    "C:\Users\Admin\AppData\Local\Temp\PROJECT FEJ-1601.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:4536
- C:\Windows\SysWOW64\cmmon32.exe
  "C:\Windows\SysWOW64\cmmon32.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:1172
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\PROJECT FEJ-1601.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3760

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/1172-20-0x0000000000740000-0x000000000074C000-memory.dmp

Filesize
48KB

Download
memory/1172-21-0x0000000000740000-0x000000000074C000-memory.dmp

Filesize
48KB

Download
memory/3472-19-0x0000000008A00000-0x0000000008B94000-memory.dmp

Filesize
1.6MB

Download
memory/3472-29-0x0000000008BA0000-0x0000000008CDA000-memory.dmp

Filesize
1.2MB

Download
memory/3472-27-0x0000000008BA0000-0x0000000008CDA000-memory.dmp

Filesize
1.2MB

Download
memory/3472-26-0x0000000008BA0000-0x0000000008CDA000-memory.dmp

Filesize
1.2MB

Download
memory/3472-22-0x0000000008A00000-0x0000000008B94000-memory.dmp

Filesize
1.6MB

Download
memory/4428-6-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/4428-4-0x0000000005180000-0x0000000005212000-memory.dmp

Filesize
584KB

Download
memory/4428-9-0x000000007531E000-0x000000007531F000-memory.dmp

Filesize
4KB

Download
memory/4428-10-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/4428-11-0x0000000000FC0000-0x0000000001022000-memory.dmp

Filesize
392KB

Download
memory/4428-8-0x00000000055E0000-0x00000000055EA000-memory.dmp

Filesize
40KB

Download
memory/4428-14-0x0000000075310000-0x0000000075AC0000-memory.dmp

Filesize
7.7MB

Download
memory/4428-1-0x00000000006B0000-0x0000000000718000-memory.dmp

Filesize
416KB

Download
memory/4428-2-0x00000000050E0000-0x000000000517C000-memory.dmp

Filesize
624KB

Download
memory/4428-3-0x0000000005730000-0x0000000005CD4000-memory.dmp

Filesize
5.6MB

Download
memory/4428-7-0x00000000053A0000-0x00000000053F6000-memory.dmp

Filesize
344KB

Download
memory/4428-0-0x000000007531E000-0x000000007531F000-memory.dmp

Filesize
4KB

Download
memory/4428-5-0x00000000050C0000-0x00000000050CA000-memory.dmp

Filesize
40KB

Download
memory/4536-12-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/4536-17-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/4536-18-0x00000000012E0000-0x00000000012F4000-memory.dmp

Filesize
80KB

Download
memory/4536-15-0x0000000001340000-0x000000000168A000-memory.dmp

Filesize
3.3MB

Download

Analysis

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