formbook | 4562af450cbc44c9ddf59509c802f83abcc2dc66a2eccc0b734ea7ceded60522

General

Target

tmp.exe
Size

1.1MB
MD5

911b41caf07e1358460415fe7ddc9ba5
SHA1

2a2e2120055b91824166b4cbecb86b25cab7a6f1
SHA256

4562af450cbc44c9ddf59509c802f83abcc2dc66a2eccc0b734ea7ceded60522
SHA512

92f5410901ce62f81bd2d1e0e86cd3492b05fcf415a271e9784994239296b3001e1a53b5ff176d1c3cc09fa42ae1e0c379cada397c74d7e232590e048938b80d
SSDEEP

12288:imIFTT41hw4e/ehLrz9+maNmNR734hodpBXk8jB6rSDdrCsv6ySk1hw4e/:lIF/L4LJwNmNYqpBXXQCOsvu4

Score

10^/10

formbook nytc rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

nytc

Decoy

xxa3lYw6m81Pd//kzzAdG4U=

YXZAfGEJkwXABM5TR/E=

hUbaOQOt0DYguI9XS8pwJrEZWmU=

A/ygqm4Kfa0kUcnqnsJDp+zEWGM=

RORz56hFPHnrLO2iW0+9

iqg4UizXgbNRcvmiW0+9

VRTafWQvdNtipVkn5VtZyrF/+rnbCQ==

gQueRkb7G4Z/Jvu3qBQZNo8=

ePKbHxG8f76FOQesODERPA==

fHESMDnjE3MqK+7b

0k/peV8LzCGeqzU7ODERPA==

cTQPl24ePactS+KiW0+9

pjTaSRTKnctzqirmZx/oa3X0tg==

aAWYMRriqLzAA85TR/E=

tDgT5cRmmQqRpFrkpR+4

drFaFOGXywjGUxzL9wm++AOs

Okbd//qcDXIbai4QB7WKaH+p6bEPPfgV

ae/IhkTwKWcXT9mY6A+++AOs

eEbmHeuHEHk4xoclVxQZNo8=

C2I8W0/9c+jsDk/CmEn8Ng==

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer 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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	tmp.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4480 set thread context of 4120	4480	tmp.exe	99
PID 4120 set thread context of 2204	4120	tmp.exe	45
PID 4120 set thread context of 2204	4120	tmp.exe	45
PID 5104 set thread context of 2204	5104	wlanext.exe	45

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	wlanext.exe

Suspicious behavior: EnumeratesProcesses 44 IoCs

pid	Process
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2204	Explorer.EXE

Suspicious behavior: MapViewOfSection 8 IoCs

pid	Process
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
4120	tmp.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe
5104	wlanext.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4120	tmp.exe
Token: SeDebugPrivilege	5104	wlanext.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4480 wrote to memory of 4120	4480	tmp.exe	99
PID 4480 wrote to memory of 4120	4480	tmp.exe	99
PID 4480 wrote to memory of 4120	4480	tmp.exe	99
PID 4480 wrote to memory of 4120	4480	tmp.exe	99
PID 4480 wrote to memory of 4120	4480	tmp.exe	99
PID 4480 wrote to memory of 4120	4480	tmp.exe	99
PID 2204 wrote to memory of 5104	2204	Explorer.EXE	100
PID 2204 wrote to memory of 5104	2204	Explorer.EXE	100
PID 2204 wrote to memory of 5104	2204	Explorer.EXE	100
PID 5104 wrote to memory of 5016	5104	wlanext.exe	102
PID 5104 wrote to memory of 5016	5104	wlanext.exe	102
PID 5104 wrote to memory of 5016	5104	wlanext.exe	102

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:4480
- - C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    3⤵
    - Checks computer location settings
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:4120
- C:\Windows\SysWOW64\wlanext.exe
  "C:\Windows\SysWOW64\wlanext.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5104
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:5016

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2204-144-0x0000000003300000-0x00000000033C8000-memory.dmp

Filesize
800KB

Download
memory/2204-156-0x00000000033D0000-0x00000000034AA000-memory.dmp

Filesize
872KB

Download
memory/2204-154-0x00000000033D0000-0x00000000034AA000-memory.dmp

Filesize
872KB

Download
memory/2204-147-0x00000000085A0000-0x00000000086DB000-memory.dmp

Filesize
1.2MB

Download
memory/4120-149-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/4120-146-0x0000000002D10000-0x0000000002D20000-memory.dmp

Filesize
64KB

Download
memory/4120-139-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/4120-142-0x00000000010C0000-0x000000000140A000-memory.dmp

Filesize
3.3MB

Download
memory/4120-141-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

Download
memory/4120-143-0x00000000007F0000-0x0000000000800000-memory.dmp

Filesize
64KB

Download
memory/4480-135-0x0000000005770000-0x000000000577A000-memory.dmp

Filesize
40KB

Download
memory/4480-136-0x0000000009AA0000-0x0000000009B3C000-memory.dmp

Filesize
624KB

Download
memory/4480-137-0x0000000009B40000-0x0000000009BA6000-memory.dmp

Filesize
408KB

Download
memory/4480-132-0x0000000000B10000-0x0000000000C2A000-memory.dmp

Filesize
1.1MB

Download
memory/4480-134-0x00000000055E0000-0x0000000005672000-memory.dmp

Filesize
584KB

Download
memory/4480-133-0x0000000005AB0000-0x0000000006054000-memory.dmp

Filesize
5.6MB

Download
memory/5104-150-0x00000000011F0000-0x000000000153A000-memory.dmp

Filesize
3.3MB

Download
memory/5104-152-0x0000000000A00000-0x0000000000A2B000-memory.dmp

Filesize
172KB

Download
memory/5104-151-0x00000000006A0000-0x00000000006B7000-memory.dmp

Filesize
92KB

Download
memory/5104-153-0x0000000001050000-0x00000000010DF000-memory.dmp

Filesize
572KB

Download
memory/5104-155-0x0000000000A00000-0x0000000000A2B000-memory.dmp

Filesize
172KB

Download

Analysis

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