formbook | 152a48809e8fdbf56fdcd03fe152fd95cd73bb3d0a8e396b4366efe7e7d18314

General

Target

INVOICE.exe
Size

240KB
MD5

98901aff995d92677cf637b241ae9a9b
SHA1

6dac1968c4a9ae4bf26f7fd38efb721fcf7d05dc
SHA256

fb6e849cd3af7e8b0c8143397e62a595a42abbfbbac81f2cdd0b2cb4d18ea543
SHA512

e969e941f176c67d1be598ac56882048fb2fc401e5a582b9f2314f09738d6b8768522ba5f67d8c80c260f1169ac103b8972084611a23ea9467c513f03ca9d883
SSDEEP

6144:Ds9q5ND7xrAX/6ccjpGYZ/T12D2TLV47VVgLP3CATNTLzcocuk:ySD9rAXCccjN/T1TRXbtcuk

Score

10^/10

formbook uer0 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

uer0

Decoy

bonds101.com

lyotrust.com

can-amchainseurope.com

mysoulcure.com

hometownsmut.com

cxpzhy.site

hjklrmn.xyz

bsdminingservice.com

mockpacket.com

standwithkam.com

yxbdj.com

soulseedz.com

whxldjt.com

ruayhunhangseng.com

benefitcrystal.info

rahalake.com

cryptnex.com

comicslighthouse.com

ridenwithbiden.net

samsunbilsem.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
behavioral1/memory/2776-11-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/2776-13-0x0000000000400000-0x000000000042E000-memory.dmp	formbook
behavioral1/memory/2848-19-0x0000000000080000-0x00000000000AE000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
2768	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1420	INVOICE.exe
1420	INVOICE.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1420 set thread context of 2776	1420	INVOICE.exe	30
PID 2776 set thread context of 1196	2776	INVOICE.exe	21
PID 2848 set thread context of 1196	2848	explorer.exe	21

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

System Information Discovery
T1082

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	INVOICE.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 35 IoCs

pid	Process
1420	INVOICE.exe
1420	INVOICE.exe
1420	INVOICE.exe
1420	INVOICE.exe
2776	INVOICE.exe
2776	INVOICE.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe
2848	explorer.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
1420	INVOICE.exe
2776	INVOICE.exe
2776	INVOICE.exe
2776	INVOICE.exe
2848	explorer.exe
2848	explorer.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2776	INVOICE.exe
Token: SeDebugPrivilege	2848	explorer.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1420 wrote to memory of 2776	1420	INVOICE.exe	30
PID 1420 wrote to memory of 2776	1420	INVOICE.exe	30
PID 1420 wrote to memory of 2776	1420	INVOICE.exe	30
PID 1420 wrote to memory of 2776	1420	INVOICE.exe	30
PID 1420 wrote to memory of 2776	1420	INVOICE.exe	30
PID 1196 wrote to memory of 2848	1196	Explorer.EXE	31
PID 1196 wrote to memory of 2848	1196	Explorer.EXE	31
PID 1196 wrote to memory of 2848	1196	Explorer.EXE	31
PID 1196 wrote to memory of 2848	1196	Explorer.EXE	31
PID 2848 wrote to memory of 2768	2848	explorer.exe	32
PID 2848 wrote to memory of 2768	2848	explorer.exe	32
PID 2848 wrote to memory of 2768	2848	explorer.exe	32
PID 2848 wrote to memory of 2768	2848	explorer.exe	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1196
- C:\Users\Admin\AppData\Local\Temp\INVOICE.exe
  "C:\Users\Admin\AppData\Local\Temp\INVOICE.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:1420
- - C:\Users\Admin\AppData\Local\Temp\INVOICE.exe
    "C:\Users\Admin\AppData\Local\Temp\INVOICE.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2776
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\SysWOW64\explorer.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:2848
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\INVOICE.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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

\Users\Admin\AppData\Local\Temp\nsj7255.tmp\System.dll

Filesize
11KB

MD5
fccff8cb7a1067e23fd2e2b63971a8e1

SHA1
30e2a9e137c1223a78a0f7b0bf96a1c361976d91

SHA256
6fcea34c8666b06368379c6c402b5321202c11b00889401c743fb96c516c679e

SHA512
f4335e84e6f8d70e462a22f1c93d2998673a7616c868177cac3e8784a3be1d7d0bb96f2583fa0ed82f4f2b6b8f5d9b33521c279a42e055d80a94b4f3f1791e0c

Download Submit
memory/1196-14-0x0000000005150000-0x00000000052A0000-memory.dmp

Filesize
1.3MB

Download
memory/1196-20-0x0000000005150000-0x00000000052A0000-memory.dmp

Filesize
1.3MB

Download
memory/2776-11-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2776-13-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/2848-17-0x00000000005E0000-0x0000000000861000-memory.dmp

Filesize
2.5MB

Download
memory/2848-18-0x00000000005E0000-0x0000000000861000-memory.dmp

Filesize
2.5MB

Download
memory/2848-19-0x0000000000080000-0x00000000000AE000-memory.dmp

Filesize
184KB

Download

Analysis

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