formbook | 031527224e74b82bf16e639c666134674ecc8a6e648fed2f68255617bd6a3b18 | Triage

Analysis

max time kernel
150s
max time network
137s
platform
windows10_x64
resource
win10v20210410
submitted
30-07-2021 15:25

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General

Target

????? ?????? ????#454326_PDF.exe
Size

899KB
MD5

8ffb5b1aba6759d623f20a9744de4dd0
SHA1

969a580a9e874f8e5a38d7fb4db664be1aa35ce5
SHA256

8674688f673421c41dd39734f690c3b1b0aa8aceb5adeb057cf8b21d8f2e41a6
SHA512

3713871db07036eca5846ca681432e63dbf1951a47186c1f8458a3395da57b53ab796f5b44025bb277cb6f281fecf401d090bc8618fa72b9ea20fce8991a538c

Score

10^/10

formbook rat spyware stealer suricata trojan

Malware Config

Extracted

Family

formbook

Version

4.1

C2

http://www.constructioncleanup.pro/vd9n/

Decoy

theunwrappedcollective.com

seckj-ic.com

tyresandover.com

thetrophyworld.com

fonggrconstruction.com

hopiproject.com

sktitle.com

charlotteobscurer.com

qjuhe.com

girlzglitter.com

createmylawn.com

hempcbgpill.com

zzdfdzkj.com

shreehariessential.com

226sm.com

getcupscall.com

neuralviolin.com

sanskaar.life

xn--fhqrm54yyukopc.com

togetherx4fantasy5star.today

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata

Formbook Payload 3 IoCs

resource	yara_rule
behavioral4/memory/2092-126-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral4/memory/2092-127-0x000000000041EBD0-mapping.dmp	formbook
behavioral4/memory/1040-135-0x00000000007C0000-0x00000000007EE000-memory.dmp	formbook

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3056 set thread context of 2092	3056	_____ ______ ____#454326_PDF.exe	80
PID 2092 set thread context of 3064	2092	RegSvcs.exe	47
PID 2092 set thread context of 3064	2092	RegSvcs.exe	47
PID 1040 set thread context of 3064	1040	control.exe	47

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

Scheduled Task

pid	Process
1328	schtasks.exe

Suspicious behavior: EnumeratesProcesses 41 IoCs

pid	Process
3056	_____ ______ ____#454326_PDF.exe
2092	RegSvcs.exe
2092	RegSvcs.exe
2092	RegSvcs.exe
2092	RegSvcs.exe
2092	RegSvcs.exe
2092	RegSvcs.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe
1040	control.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3064	Explorer.EXE

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2092	RegSvcs.exe
2092	RegSvcs.exe
2092	RegSvcs.exe
2092	RegSvcs.exe
1040	control.exe
1040	control.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	_____ ______ ____#454326_PDF.exe
Token: SeDebugPrivilege	2092	RegSvcs.exe
Token: SeShutdownPrivilege	3064	Explorer.EXE
Token: SeCreatePagefilePrivilege	3064	Explorer.EXE
Token: SeDebugPrivilege	1040	control.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
3064	Explorer.EXE

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 1328	3056	_____ ______ ____#454326_PDF.exe	78
PID 3056 wrote to memory of 1328	3056	_____ ______ ____#454326_PDF.exe	78
PID 3056 wrote to memory of 1328	3056	_____ ______ ____#454326_PDF.exe	78
PID 3056 wrote to memory of 2092	3056	_____ ______ ____#454326_PDF.exe	80
PID 3056 wrote to memory of 2092	3056	_____ ______ ____#454326_PDF.exe	80
PID 3056 wrote to memory of 2092	3056	_____ ______ ____#454326_PDF.exe	80
PID 3056 wrote to memory of 2092	3056	_____ ______ ____#454326_PDF.exe	80
PID 3056 wrote to memory of 2092	3056	_____ ______ ____#454326_PDF.exe	80
PID 3056 wrote to memory of 2092	3056	_____ ______ ____#454326_PDF.exe	80
PID 3064 wrote to memory of 1040	3064	Explorer.EXE	85
PID 3064 wrote to memory of 1040	3064	Explorer.EXE	85
PID 3064 wrote to memory of 1040	3064	Explorer.EXE	85
PID 1040 wrote to memory of 3824	1040	control.exe	86
PID 1040 wrote to memory of 3824	1040	control.exe	86
PID 1040 wrote to memory of 3824	1040	control.exe	86

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Users\Admin\AppData\Local\Temp\_____ ______ ____#454326_PDF.exe
  "C:\Users\Admin\AppData\Local\Temp\_____ ______ ____#454326_PDF.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3056
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tUlSEv" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF1F7.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1328
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2092
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:4052
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:3164
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:3916
- C:\Windows\SysWOW64\autoconv.exe
  "C:\Windows\SysWOW64\autoconv.exe"
  2⤵
  PID:3448
- C:\Windows\SysWOW64\control.exe
  "C:\Windows\SysWOW64\control.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1040
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
    3⤵
    PID:3824

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

Credential Access

Discovery

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1040-138-0x0000000000CD0000-0x0000000000D63000-memory.dmp

Filesize
588KB

Download
memory/1040-137-0x0000000000E70000-0x0000000001190000-memory.dmp

Filesize
3.1MB

Download
memory/1040-135-0x00000000007C0000-0x00000000007EE000-memory.dmp

Filesize
184KB

Download
memory/1040-134-0x0000000001250000-0x0000000001270000-memory.dmp

Filesize
128KB

Download
memory/2092-129-0x0000000001C10000-0x0000000001C24000-memory.dmp

Filesize
80KB

Download
memory/2092-131-0x0000000001C60000-0x0000000001C74000-memory.dmp

Filesize
80KB

Download
memory/2092-128-0x00000000018A0000-0x0000000001BC0000-memory.dmp

Filesize
3.1MB

Download
memory/2092-126-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/3056-118-0x00000000050F0000-0x0000000005182000-memory.dmp

Filesize
584KB

Download
memory/3056-114-0x0000000000850000-0x0000000000851000-memory.dmp

Filesize
4KB

Download
memory/3056-121-0x0000000005770000-0x000000000578B000-memory.dmp

Filesize
108KB

Download
memory/3056-122-0x0000000008860000-0x00000000088D8000-memory.dmp

Filesize
480KB

Download
memory/3056-120-0x00000000054B0000-0x00000000054B1000-memory.dmp

Filesize
4KB

Download
memory/3056-119-0x0000000005170000-0x0000000005171000-memory.dmp

Filesize
4KB

Download
memory/3056-123-0x00000000088F0000-0x0000000008923000-memory.dmp

Filesize
204KB

Download
memory/3056-117-0x0000000005190000-0x0000000005191000-memory.dmp

Filesize
4KB

Download
memory/3056-116-0x00000000057C0000-0x00000000057C1000-memory.dmp

Filesize
4KB

Download
memory/3064-130-0x0000000004DB0000-0x0000000004F53000-memory.dmp

Filesize
1.6MB

Download
memory/3064-132-0x00000000043C0000-0x00000000044C7000-memory.dmp

Filesize
1.0MB

Download
memory/3064-139-0x00000000025C0000-0x0000000002687000-memory.dmp

Filesize
796KB

Download