formbook | aa7ab4157c0ea04bfff754a8427eddf57cc270d8cb7b01752cc070c71ac7bdd8

General

Target

37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585.exe
Size

225KB
MD5

3359916b838254bede2336070d99b6e5
SHA1

ae40ca0d6b91624cd8d9ef1b30e1ce2338c3309f
SHA256

37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585
SHA512

989e405e72f4be4abcca21e8b8cb84b37165e00a88a13f3186801f0f64be8c6a7e70d069e69dfb58f71622a6b41b5c9a93d20279e4a3c580f3e2f488d59a7406
SSDEEP

3072:qUJoFfWzzl+cSM2wPddXssJXKAI95ibwrhlikpXbeK3eMmR6M3vcJLSmKqcHKrF+:qweEp2KjV5IDiErh7bNmv0JLlcHKrF+T

Score

10^/10

formbook f4ca discovery rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

f4ca

Decoy

omFHB5ajfJi1UEIEV9XcoRw=

UBjJkmQPyprdhcFF/bdCWQ==

evGKkBUj1je+otcfpw==

KgvGVeOATSt3nug0BIOm2JvOQycB

Lv6o3K0r9aSjI0lr9fg1txw=

LH1jJb/HieQpsEdqWCQTvX2PmsDVIeg=

99dte0XauJfk6Xv+uQxJFgA1gMktBA==

21FkkGB9gMniDQw2ffu6

r4lKBM/q6TZwVZfS

F+14qHeVWi56KdQ=

BgWXRsVoICMvvQ==

I+EozFl0Uy56KdQ=

xoXCgEllKEbWfjFCCLo=

qo9G1lXvvGt5GkxrLQWw

ORNlYic0PJ2ip4geEFSv

Yj+GFpvFxy0uVYx1fLI/XQ==

XL+veIKPjOTe4fjvFs+n

D2JKVAfuakXCAyoEvw==

voWJU81tH56wvt/vImbCcgVd

dVEcwFrmb8bZ4vXvFs+n

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Control Panel\International\Geo\Nation	xxrkypy.exe

Executes dropped EXE 2 IoCs

pid	Process
2276	xxrkypy.exe
2564	xxrkypy.exe

Loads dropped DLL 2 IoCs

pid	Process
2476	37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585.exe
2276	xxrkypy.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2276 set thread context of 2564	2276	xxrkypy.exe	31
PID 2564 set thread context of 1200	2564	xxrkypy.exe	21
PID 1924 set thread context of 1200	1924	rundll32.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	xxrkypy.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585.exe

Suspicious behavior: EnumeratesProcesses 33 IoCs

pid	Process
2564	xxrkypy.exe
2564	xxrkypy.exe
2564	xxrkypy.exe
2564	xxrkypy.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe
1924	rundll32.exe

Suspicious behavior: MapViewOfSection 6 IoCs

pid	Process
2276	xxrkypy.exe
2564	xxrkypy.exe
2564	xxrkypy.exe
2564	xxrkypy.exe
1924	rundll32.exe
1924	rundll32.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2564	xxrkypy.exe
Token: SeDebugPrivilege	1924	rundll32.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2476 wrote to memory of 2276	2476	37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585.exe	30
PID 2476 wrote to memory of 2276	2476	37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585.exe	30
PID 2476 wrote to memory of 2276	2476	37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585.exe	30
PID 2476 wrote to memory of 2276	2476	37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585.exe	30
PID 2276 wrote to memory of 2564	2276	xxrkypy.exe	31
PID 2276 wrote to memory of 2564	2276	xxrkypy.exe	31
PID 2276 wrote to memory of 2564	2276	xxrkypy.exe	31
PID 2276 wrote to memory of 2564	2276	xxrkypy.exe	31
PID 2276 wrote to memory of 2564	2276	xxrkypy.exe	31
PID 1200 wrote to memory of 1924	1200	Explorer.EXE	32
PID 1200 wrote to memory of 1924	1200	Explorer.EXE	32
PID 1200 wrote to memory of 1924	1200	Explorer.EXE	32
PID 1200 wrote to memory of 1924	1200	Explorer.EXE	32
PID 1200 wrote to memory of 1924	1200	Explorer.EXE	32
PID 1200 wrote to memory of 1924	1200	Explorer.EXE	32
PID 1200 wrote to memory of 1924	1200	Explorer.EXE	32

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:1200
- C:\Users\Admin\AppData\Local\Temp\37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585.exe
  "C:\Users\Admin\AppData\Local\Temp\37fc27ae593c57c90608af9929d7ade4fc5924ec4e795c445c4bf8a5a1bf8585.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2476
- - C:\Users\Admin\AppData\Local\Temp\xxrkypy.exe
    "C:\Users\Admin\AppData\Local\Temp\xxrkypy.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2276
  - - C:\Users\Admin\AppData\Local\Temp\xxrkypy.exe
      "C:\Users\Admin\AppData\Local\Temp\xxrkypy.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:2564
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\SysWOW64\rundll32.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  PID:1924

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

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\uygpu.qh

Filesize
5KB

MD5
8e97c83dc389c1fa5dc9cdceacf4d4b5

SHA1
4c143609bfea2efba4aedcdc7e31fc53e1ecd94c

SHA256
008753e08eb498464a40205664506c9f18098b67fbcabafd873aeded7ad44425

SHA512
fe99141853e49ef0a1d893667770f26ea13c344dc6b7a43cbc23cd441a8fdbdd704a25dcfe7533c65792c8a1bc93f792a460490fbf79fe465dd528244f59e415

Download Submit
C:\Users\Admin\AppData\Local\Temp\uzqdeuvsss.y

Filesize
185KB

MD5
000956d9b032dd95819bf1da8acdfa35

SHA1
cc84b73cbca09be962fc20203017706459f757a3

SHA256
eb97119a88606e5e8cdae66a53b8fe44c3143b0f629ea54e4ca0103aeb121535

SHA512
d6dedd8852bd63f8eef55c7070fbd851c58d647be359a005bf801dc702c34abafc2275e9c28371431967763d948b95328a1cee94fb7652bf832cea2a2651aebd

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

Filesize
5KB

MD5
818e4839cf473064fde652fb001fcce6

SHA1
b051185eddc6992bd0b4092e338ed067487af57a

SHA256
72eefcdcbb8c9510a83e9ce80810d84688416ede5d4041aee4944f04b7cb903b

SHA512
9b8aa6a9ef6d125f80ef555429d45e970f873440d95ac8f687a2ff782d46fdf71c8b66d351010346b989fbeb74f815e96b774a6c463aa9e974399e9a67e50c06

Download Submit
memory/1200-20-0x0000000006DD0000-0x0000000006F35000-memory.dmp

Filesize
1.4MB

Download
memory/1200-28-0x0000000006DD0000-0x0000000006F35000-memory.dmp

Filesize
1.4MB

Download
memory/1924-23-0x0000000000720000-0x000000000072E000-memory.dmp

Filesize
56KB

Download
memory/1924-24-0x0000000000720000-0x000000000072E000-memory.dmp

Filesize
56KB

Download
memory/1924-26-0x0000000000720000-0x000000000072E000-memory.dmp

Filesize
56KB

Download
memory/1924-27-0x0000000000090000-0x00000000000BD000-memory.dmp

Filesize
180KB

Download
memory/2276-8-0x0000000000230000-0x0000000000232000-memory.dmp

Filesize
8KB

Download
memory/2564-15-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2564-18-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2564-16-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2564-12-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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