formbook | 0505d6f20405f635068b46f0adc82e65ea574da428e4b8fd256c64a9ecf237fe

Analysis

max time kernel
148s
max time network
140s
platform
windows7_x64
resource
win7v20210408
submitted
26/04/2021, 05:14

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General

Target
outstanding invoices pdf.exe
Size 770KB
Sample210426-jf8f4f34g2
SHA256 05b6ee8ad090962be89b9f9d1c604541bfc1914e94c245bad6f469988eed019c
MD5 07e0dbb2b8cb7247ed7419cc840c9f63
SHA1 41c74bec66a317817a62215828c0f31af2afe6d8
SHA512 5deaf52f565a1a1e6d56211e4e874f99c2830698363904447bd1f6b445a87f946c9550a7d3f18f0e4029c7522aa8fb94eb4017bd7c2aff4d1070875b2d0efb7d
MD5 SHA1 SHA512

Score

10^/10

formbook rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

http://w��5 �@q[*��S=��m

Signatures

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

Formbook Payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/556-66-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/556-67-0x000000000041EAC0-mapping.dmp	formbook
behavioral1/memory/316-75-0x00000000001C0000-0x00000000001EE000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
1564	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 736 set thread context of 556	736	outstanding invoices pdf.exe	33
PID 556 set thread context of 1204	556	outstanding invoices pdf.exe	14
PID 316 set thread context of 1204	316	cscript.exe	14

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.

persistence

Scheduled Task

T1053

pid	Process
580	schtasks.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
736	outstanding invoices pdf.exe
736	outstanding invoices pdf.exe
736	outstanding invoices pdf.exe
736	outstanding invoices pdf.exe
736	outstanding invoices pdf.exe
556	outstanding invoices pdf.exe
556	outstanding invoices pdf.exe
316	cscript.exe
316	cscript.exe
316	cscript.exe
316	cscript.exe
316	cscript.exe
316	cscript.exe
316	cscript.exe
316	cscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
556	outstanding invoices pdf.exe
556	outstanding invoices pdf.exe
556	outstanding invoices pdf.exe
316	cscript.exe
316	cscript.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	736	outstanding invoices pdf.exe
Token: SeDebugPrivilege	556	outstanding invoices pdf.exe
Token: SeDebugPrivilege	316	cscript.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 736 wrote to memory of 580	736	outstanding invoices pdf.exe	29
PID 736 wrote to memory of 580	736	outstanding invoices pdf.exe	29
PID 736 wrote to memory of 580	736	outstanding invoices pdf.exe	29
PID 736 wrote to memory of 580	736	outstanding invoices pdf.exe	29
PID 736 wrote to memory of 336	736	outstanding invoices pdf.exe	31
PID 736 wrote to memory of 336	736	outstanding invoices pdf.exe	31
PID 736 wrote to memory of 336	736	outstanding invoices pdf.exe	31
PID 736 wrote to memory of 336	736	outstanding invoices pdf.exe	31
PID 736 wrote to memory of 1660	736	outstanding invoices pdf.exe	32
PID 736 wrote to memory of 1660	736	outstanding invoices pdf.exe	32
PID 736 wrote to memory of 1660	736	outstanding invoices pdf.exe	32
PID 736 wrote to memory of 1660	736	outstanding invoices pdf.exe	32
PID 736 wrote to memory of 556	736	outstanding invoices pdf.exe	33
PID 736 wrote to memory of 556	736	outstanding invoices pdf.exe	33
PID 736 wrote to memory of 556	736	outstanding invoices pdf.exe	33
PID 736 wrote to memory of 556	736	outstanding invoices pdf.exe	33
PID 736 wrote to memory of 556	736	outstanding invoices pdf.exe	33
PID 736 wrote to memory of 556	736	outstanding invoices pdf.exe	33
PID 736 wrote to memory of 556	736	outstanding invoices pdf.exe	33
PID 1204 wrote to memory of 316	1204	Explorer.EXE	34
PID 1204 wrote to memory of 316	1204	Explorer.EXE	34
PID 1204 wrote to memory of 316	1204	Explorer.EXE	34
PID 1204 wrote to memory of 316	1204	Explorer.EXE	34
PID 316 wrote to memory of 1564	316	cscript.exe	35
PID 316 wrote to memory of 1564	316	cscript.exe	35
PID 316 wrote to memory of 1564	316	cscript.exe	35
PID 316 wrote to memory of 1564	316	cscript.exe	35

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1204
- C:\Users\Admin\AppData\Local\Temp\outstanding invoices pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\outstanding invoices pdf.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:736
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\akzhsTT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp13DE.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:580
- - C:\Users\Admin\AppData\Local\Temp\outstanding invoices pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\outstanding invoices pdf.exe"
    3⤵
    PID:336
- - C:\Users\Admin\AppData\Local\Temp\outstanding invoices pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\outstanding invoices pdf.exe"
    3⤵
    PID:1660
- - C:\Users\Admin\AppData\Local\Temp\outstanding invoices pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\outstanding invoices pdf.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:556
- C:\Windows\SysWOW64\cscript.exe
  "C:\Windows\SysWOW64\cscript.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:316
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\outstanding invoices pdf.exe"
    3⤵
    - Deletes itself
    PID:1564

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/316-77-0x0000000002360000-0x00000000023F3000-memory.dmp

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memory/316-76-0x0000000000B30000-0x0000000000E33000-memory.dmp

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memory/316-75-0x00000000001C0000-0x00000000001EE000-memory.dmp

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memory/316-74-0x0000000000E90000-0x0000000000EB2000-memory.dmp

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memory/556-66-0x0000000000400000-0x000000000042E000-memory.dmp

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memory/556-69-0x0000000000A30000-0x0000000000D33000-memory.dmp

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memory/556-70-0x0000000000210000-0x0000000000224000-memory.dmp

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memory/736-60-0x0000000075891000-0x0000000075893000-memory.dmp

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memory/736-63-0x000000007EF50000-0x000000007EF51000-memory.dmp

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memory/736-62-0x0000000002131000-0x0000000002132000-memory.dmp

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memory/736-61-0x0000000002130000-0x0000000002131000-memory.dmp

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memory/1204-71-0x00000000041D0000-0x0000000004314000-memory.dmp

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memory/1204-78-0x0000000004B00000-0x0000000004C3B000-memory.dmp

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