formbook | 7c7d4f4bbfb59172de4bd6c478c510f5d87c4f28f9952c4edd543ce798fe14d2

General

Target

oujsjnpvzn.exe
Size

58KB
MD5

a53bf35dd3f2a0ece1babdf99d98ddb7
SHA1

866e4d1315486d4f792e03449def24bf48fba2f5
SHA256

f27f1c46335ed31550b8fd38781e85fd498edaf77ffc7fdea7b32f044c5cc26d
SHA512

f0ea778f032871260b891116e880c1814a7eeb512b4f649c8a3d355109aed9858128477a8d2c1d12dac5ace5be74879dfd590b9959c309ce67d1879828f679f2
SSDEEP

1536:s1ep1tOKxVeU01JVlG9NSstFdGxveJh7LY0GRRxfW:s10tOKinJlwN2ypGR/fW

Score

10^/10

formbook oy10 discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

oy10

Decoy

wzwanju.com

vaultnutrition.info

propane-gallon.site

balkanmetin2.com

costa-del-sol.email

kayodeokikiolu.com

singlesshirts.com

nearestfoods.com

trenddetail.com

yihaimaidan.net

dfdr3r.site

tuitionmatters.co.uk

benglas.online

coloraja.xyz

tianzicheng.com

lamkt.com

dileca.com

6698856.com

vishi.store

ablehair.com

Signatures

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

Formbook payload 2 IoCs

rat

resource	yara_rule
behavioral3/memory/2888-4-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral3/memory/2736-10-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Deletes itself 1 IoCs

pid	Process
2800	cmd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2372 set thread context of 2888	2372	oujsjnpvzn.exe	31
PID 2888 set thread context of 1196	2888	oujsjnpvzn.exe	21
PID 2736 set thread context of 1196	2736	NAPSTAT.EXE	21

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	oujsjnpvzn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NAPSTAT.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2888	oujsjnpvzn.exe
2888	oujsjnpvzn.exe
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2888	oujsjnpvzn.exe
2888	oujsjnpvzn.exe
2888	oujsjnpvzn.exe
2736	NAPSTAT.EXE
2736	NAPSTAT.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2888	oujsjnpvzn.exe
Token: SeDebugPrivilege	2736	NAPSTAT.EXE

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2888	2372	oujsjnpvzn.exe	31
PID 2372 wrote to memory of 2888	2372	oujsjnpvzn.exe	31
PID 2372 wrote to memory of 2888	2372	oujsjnpvzn.exe	31
PID 2372 wrote to memory of 2888	2372	oujsjnpvzn.exe	31
PID 2372 wrote to memory of 2888	2372	oujsjnpvzn.exe	31
PID 1196 wrote to memory of 2736	1196	Explorer.EXE	32
PID 1196 wrote to memory of 2736	1196	Explorer.EXE	32
PID 1196 wrote to memory of 2736	1196	Explorer.EXE	32
PID 1196 wrote to memory of 2736	1196	Explorer.EXE	32
PID 2736 wrote to memory of 2800	2736	NAPSTAT.EXE	33
PID 2736 wrote to memory of 2800	2736	NAPSTAT.EXE	33
PID 2736 wrote to memory of 2800	2736	NAPSTAT.EXE	33
PID 2736 wrote to memory of 2800	2736	NAPSTAT.EXE	33

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1196
- C:\Users\Admin\AppData\Local\Temp\oujsjnpvzn.exe
  "C:\Users\Admin\AppData\Local\Temp\oujsjnpvzn.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2372
- - C:\Users\Admin\AppData\Local\Temp\oujsjnpvzn.exe
    "C:\Users\Admin\AppData\Local\Temp\oujsjnpvzn.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:2888
- C:\Windows\SysWOW64\NAPSTAT.EXE
  "C:\Windows\SysWOW64\NAPSTAT.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:2736
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\oujsjnpvzn.exe"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:2800

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/1196-6-0x00000000063E0000-0x000000000654B000-memory.dmp

Filesize
1.4MB

Download
memory/1196-11-0x00000000063E0000-0x000000000654B000-memory.dmp

Filesize
1.4MB

Download
memory/1196-15-0x0000000006550000-0x00000000066B0000-memory.dmp

Filesize
1.4MB

Download
memory/1196-16-0x0000000006550000-0x00000000066B0000-memory.dmp

Filesize
1.4MB

Download
memory/1196-18-0x0000000006550000-0x00000000066B0000-memory.dmp

Filesize
1.4MB

Download
memory/2372-0-0x0000000000280000-0x0000000000282000-memory.dmp

Filesize
8KB

Download
memory/2736-9-0x0000000000580000-0x00000000005C6000-memory.dmp

Filesize
280KB

Download
memory/2736-8-0x0000000000580000-0x00000000005C6000-memory.dmp

Filesize
280KB

Download
memory/2736-10-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download
memory/2888-2-0x0000000000950000-0x0000000000C53000-memory.dmp

Filesize
3.0MB

Download
memory/2888-4-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2888-3-0x000000000041F000-0x0000000000420000-memory.dmp

Filesize
4KB

Download

Analysis

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