formbook | 10e4c6cbdc4b4d8e42c0d3eda61cf3a64283bd00bf83193303587c202590bec5

General

Target

bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204.exe
Size

241KB
MD5

cb7d4c1dc8b01bf82bb52937e5deeac4
SHA1

458dba8f4563cd030afb237d69293208d71149ad
SHA256

bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204
SHA512

3565215740241e089565892b74108c0cd408433803d4fd435fc8f5ca878b23ced260732ffb59d617bdb91bf7429af630464bb6718469d35ffa10f2aaab8cb633
SSDEEP

6144:HNeZmj7TSnqxNkECqXi2g8mKtIQgfCHaK2r1:HNljvbxNVCqXiJ8zIQ7aKE1

Score

10^/10

formbook nk6l discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Version

4.1

Campaign

nk6l

Decoy

cbnextra.com

entitysystemsinc.com

55midwoodave.com

ebelizzi.com

khojcity.com

1527brokenoakdrive.site

housinghproperties.com

ratiousa.com

lrcrepresentacoes.net

tocoec.net

khadamatdemnate.com

davidkastner.xyz

gardeniaresort.com

qiantangguoji.com

visaprepaidprocessinq.com

cristinamadara.com

semapisus.xyz

mpwebagency.net

alibabasdeli.com

gigasupplies.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/2016-14-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2016-16-0x0000000000400000-0x000000000042F000-memory.dmp	formbook
behavioral1/memory/2476-22-0x0000000000080000-0x00000000000AF000-memory.dmp	formbook

Executes dropped EXE 2 IoCs

pid	Process
2024	uyzzokhns.exe
2016	uyzzokhns.exe

Loads dropped DLL 2 IoCs

pid	Process
2356	bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204.exe
2024	uyzzokhns.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2024 set thread context of 2016	2024	uyzzokhns.exe	32
PID 2016 set thread context of 1408	2016	uyzzokhns.exe	21
PID 2476 set thread context of 1408	2476	NETSTAT.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 4 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	uyzzokhns.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	NETSTAT.EXE

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2476	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2016	uyzzokhns.exe
2016	uyzzokhns.exe
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE
2476	NETSTAT.EXE

Suspicious behavior: MapViewOfSection 5 IoCs

pid	Process
2016	uyzzokhns.exe
2016	uyzzokhns.exe
2016	uyzzokhns.exe
2476	NETSTAT.EXE
2476	NETSTAT.EXE

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2016	uyzzokhns.exe
Token: SeDebugPrivilege	2476	NETSTAT.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2356 wrote to memory of 2024	2356	bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204.exe	31
PID 2356 wrote to memory of 2024	2356	bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204.exe	31
PID 2356 wrote to memory of 2024	2356	bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204.exe	31
PID 2356 wrote to memory of 2024	2356	bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204.exe	31
PID 2024 wrote to memory of 2016	2024	uyzzokhns.exe	32
PID 2024 wrote to memory of 2016	2024	uyzzokhns.exe	32
PID 2024 wrote to memory of 2016	2024	uyzzokhns.exe	32
PID 2024 wrote to memory of 2016	2024	uyzzokhns.exe	32
PID 2024 wrote to memory of 2016	2024	uyzzokhns.exe	32
PID 2024 wrote to memory of 2016	2024	uyzzokhns.exe	32
PID 2024 wrote to memory of 2016	2024	uyzzokhns.exe	32
PID 1408 wrote to memory of 2476	1408	Explorer.EXE	33
PID 1408 wrote to memory of 2476	1408	Explorer.EXE	33
PID 1408 wrote to memory of 2476	1408	Explorer.EXE	33
PID 1408 wrote to memory of 2476	1408	Explorer.EXE	33
PID 2476 wrote to memory of 2844	2476	NETSTAT.EXE	34
PID 2476 wrote to memory of 2844	2476	NETSTAT.EXE	34
PID 2476 wrote to memory of 2844	2476	NETSTAT.EXE	34
PID 2476 wrote to memory of 2844	2476	NETSTAT.EXE	34

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1408
- C:\Users\Admin\AppData\Local\Temp\bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204.exe
  "C:\Users\Admin\AppData\Local\Temp\bb4c6c01b5e866d18d6d6559242b42e79ca9980cd9dfa0db7b4331395a6b5204.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2356
- - C:\Users\Admin\AppData\Local\Temp\uyzzokhns.exe
    C:\Users\Admin\AppData\Local\Temp\uyzzokhns.exe C:\Users\Admin\AppData\Local\Temp\exhfalpw
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2024
  - - C:\Users\Admin\AppData\Local\Temp\uyzzokhns.exe
      C:\Users\Admin\AppData\Local\Temp\uyzzokhns.exe C:\Users\Admin\AppData\Local\Temp\exhfalpw
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2016
- C:\Windows\SysWOW64\NETSTAT.EXE
  "C:\Windows\SysWOW64\NETSTAT.EXE"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Gathers network information
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2476
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\uyzzokhns.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

2

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

C:\Users\Admin\AppData\Local\Temp\exhfalpw

Filesize
4KB

MD5
0822c633a0ac58fd25ce73eeb959f4c1

SHA1
e5bf5daf96e475ee50796a051b4ca9749b6d7a8f

SHA256
087f688071a1e7081b435756668883d393546bafd81270a16f61870ac9eda3a8

SHA512
f8869b97ecb992b4727efd652a7b835907a86db39712257e9ebee2c3469c6f5a0e1380bbaf077e66f338f5f22c569a3d05a9a2e21eef26d3b6e1a90e1b59573a

Download Submit
C:\Users\Admin\AppData\Local\Temp\zq3jossht9qtwr9qc

Filesize
212KB

MD5
5860d5089dab44b3cff2e069f272e2ad

SHA1
7ee5a2e6702c5e18637d98a7abe4c7e7645451b6

SHA256
d10e73800fbba7998a4f8a7a6bf57b1f343f447864080e196e966e6a3b22e435

SHA512
214da883c24bb31d1452953fdb73ac991276b15c9800356eeb6b2138fbb4909cc758fd9b3aa5eced847062cb3a5ae623bf92486c995242a53e19b411f65c8aab

Download Submit
\Users\Admin\AppData\Local\Temp\uyzzokhns.exe

Filesize
5KB

MD5
78bbf1cff4144ac88fb2fa7a53196d91

SHA1
c7daf19ac7143a2e02173d03223a9bcbcb6e44b9

SHA256
2a46132c92ba642674b00ea5df006856498d67b30f64ca5c74061303b056ec0f

SHA512
5eb68cdaaeec7990b1358853a7a2c2b01ff81c24d1cdf2e931a20475bcb1957ac4a42f723e51b2c1a51bf837d0af784d0681027634d6260d04f400d618e9a4a6

Download Submit
memory/1408-17-0x0000000006E90000-0x0000000006FF3000-memory.dmp

Filesize
1.4MB

Download
memory/1408-23-0x0000000006E90000-0x0000000006FF3000-memory.dmp

Filesize
1.4MB

Download
memory/2016-14-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2016-16-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2024-11-0x00000000001C0000-0x00000000001C2000-memory.dmp

Filesize
8KB

Download
memory/2476-18-0x00000000009F0000-0x00000000009F9000-memory.dmp

Filesize
36KB

Download
memory/2476-21-0x00000000009F0000-0x00000000009F9000-memory.dmp

Filesize
36KB

Download
memory/2476-22-0x0000000000080000-0x00000000000AF000-memory.dmp

Filesize
188KB

Download

Analysis

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