formbook | a8ee338d80b7be8f4e1bc7b6fa10890a9f5575ea4ea8fa3db547f9f0abc22c64

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220721-en
resource tags

arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system
submitted
26/07/2022, 16:08

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General

Target
676703938dcc35c7ff494355bc00d067.exe
Size 2.1MB
Sample220726-tk8qdabdcr
SHA256 a8ee338d80b7be8f4e1bc7b6fa10890a9f5575ea4ea8fa3db547f9f0abc22c64
MD5 676703938dcc35c7ff494355bc00d067
SHA1 70156cc2b5d2b93045c0efe6511557cd00ae373a
SHA512 6c06d9ee5483ac4134db3df7c4ada9312eefe57968d52aea4b78a10c15dfb066d681c3ed8a451e3a9815ee30ff652f388d4530a89b462ad9b3bfa3b5884d2901
MD5 SHA1 SHA512

Score

10^/10

formbook xloader mt88 loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xloader

Version

Campaign

mt88

Decoy

syzbf32.xyz
pertlines.com
vybaveniprocyklostezky.com
elianmsalas.tech
a-snag-tokei-kaitori.com
tuvistaing.com
whoyoucall.net
l8e9gr.xyz
sophrologuemontevrain77.com
ciclean.com
the-roel.com
campgreencove.com
foremostbookkeeping.com
zamanscorner.com
efeturozemniyet.com
penelope.team
murata.life
solfuls.com
tradefitinvesting.com
skinbid.pro
hongyanwulei.com
aifconference.com
happinesssangha.com
microw0rker.com
agcompanion.com
renovacg.com
sisterfuckers.info
bigrockhuntingpreserve.com
loudbodies.info
hcr.store
000006138.com
ganitvigyan.com
libmananforum.xyz
bastianrob.xyz
leafybooster.com
65ratubh3j5fi.xyz
8id9pl8944ktb.xyz
designerinfotech.com
prmainey.com
5092377.com
mayascleanservices.com
selectendeavor.com
qxu0l1pgl9jm1.xyz
yanpoake.com
constructiongst.com
wwwfreemovies2021.com
norsgaard.net
raytan5.com
electricsemiloans.com
modernworklabs.com
sodapins.com
scwsav.com
ihrorg.com
vvv223.com
sofanemphuyen.com
zaqv40.xyz
verdure720.com
mysitetutorial.com
tur-advocates.com
vistadocs.com
kosodate-tiger.com
micahlinacero.com
nusires.com
ardtalscase.com
mariafonsecafreitas.com

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook
Xloader
Xloader is a rebranded version of Formbook malware.
loader xloader

Xloader payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/4584-139-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/4584-142-0x0000000000400000-0x000000000042B000-memory.dmp	xloader
behavioral2/memory/4636-148-0x0000000000380000-0x00000000003AB000-memory.dmp	xloader
behavioral2/memory/4636-152-0x0000000000380000-0x00000000003AB000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	msiexec.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Z8TPP4O83FM = "C:\\Program Files (x86)\\Byn_hbhix\\Cookiesulf.exe"	msiexec.exe

Blocklisted process makes network request 2 IoCs

flow	pid	Process
31	4636	msiexec.exe
60	4636	msiexec.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4064 set thread context of 4584	4064	676703938dcc35c7ff494355bc00d067.exe	81
PID 4584 set thread context of 764	4584	InstallUtil.exe	37
PID 4636 set thread context of 764	4636	msiexec.exe	37

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Byn_hbhix\Cookiesulf.exe	msiexec.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1101907861-274115917-2188613224-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	msiexec.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4064	676703938dcc35c7ff494355bc00d067.exe
4064	676703938dcc35c7ff494355bc00d067.exe
4064	676703938dcc35c7ff494355bc00d067.exe
4064	676703938dcc35c7ff494355bc00d067.exe
4064	676703938dcc35c7ff494355bc00d067.exe
4064	676703938dcc35c7ff494355bc00d067.exe
4064	676703938dcc35c7ff494355bc00d067.exe
4064	676703938dcc35c7ff494355bc00d067.exe
4064	676703938dcc35c7ff494355bc00d067.exe
4064	676703938dcc35c7ff494355bc00d067.exe
4584	InstallUtil.exe
4584	InstallUtil.exe
4584	InstallUtil.exe
4584	InstallUtil.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
764	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
4584	InstallUtil.exe
4584	InstallUtil.exe
4584	InstallUtil.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe
4636	msiexec.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4584	InstallUtil.exe
Token: SeDebugPrivilege	4636	msiexec.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 2512	4064	676703938dcc35c7ff494355bc00d067.exe	80
PID 4064 wrote to memory of 2512	4064	676703938dcc35c7ff494355bc00d067.exe	80
PID 4064 wrote to memory of 2512	4064	676703938dcc35c7ff494355bc00d067.exe	80
PID 4064 wrote to memory of 4584	4064	676703938dcc35c7ff494355bc00d067.exe	81
PID 4064 wrote to memory of 4584	4064	676703938dcc35c7ff494355bc00d067.exe	81
PID 4064 wrote to memory of 4584	4064	676703938dcc35c7ff494355bc00d067.exe	81
PID 4064 wrote to memory of 4584	4064	676703938dcc35c7ff494355bc00d067.exe	81
PID 4064 wrote to memory of 4584	4064	676703938dcc35c7ff494355bc00d067.exe	81
PID 764 wrote to memory of 4636	764	Explorer.EXE	82
PID 764 wrote to memory of 4636	764	Explorer.EXE	82
PID 764 wrote to memory of 4636	764	Explorer.EXE	82
PID 4636 wrote to memory of 4532	4636	msiexec.exe	83
PID 4636 wrote to memory of 4532	4636	msiexec.exe	83
PID 4636 wrote to memory of 4532	4636	msiexec.exe	83
PID 4636 wrote to memory of 3392	4636	msiexec.exe	87
PID 4636 wrote to memory of 3392	4636	msiexec.exe	87
PID 4636 wrote to memory of 3392	4636	msiexec.exe	87
PID 4636 wrote to memory of 392	4636	msiexec.exe	89
PID 4636 wrote to memory of 392	4636	msiexec.exe	89
PID 4636 wrote to memory of 392	4636	msiexec.exe	89
PID 4636 wrote to memory of 4320	4636	msiexec.exe	91
PID 4636 wrote to memory of 4320	4636	msiexec.exe	91
PID 4636 wrote to memory of 4320	4636	msiexec.exe	91

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:764
- C:\Users\Admin\AppData\Local\Temp\676703938dcc35c7ff494355bc00d067.exe
  "C:\Users\Admin\AppData\Local\Temp\676703938dcc35c7ff494355bc00d067.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4064
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
    3⤵
    PID:2512
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of AdjustPrivilegeToken
    PID:4584
- C:\Windows\SysWOW64\msiexec.exe
  "C:\Windows\SysWOW64\msiexec.exe"
  2⤵
  - Adds policy Run key to start application
  - Blocklisted process makes network request
  - Suspicious use of SetThreadContext
  - Drops file in Program Files directory
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4636
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
    3⤵
    PID:4532
- - C:\Windows\SysWOW64\cmd.exe
    /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
    3⤵
    PID:3392
- - C:\Windows\SysWOW64\cmd.exe
    /c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
    3⤵
    PID:392
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:4320

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

DB1

Path C:\Users\Admin\AppData\Local\Temp\DB1
Size 40KB
SHA256 b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf
MD5 b608d407fc15adea97c26936bc6f03f6
SHA1 953e7420801c76393902c0d6bb56148947e41571
SHA512 cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4
SSDEEP 48:2j3WBA+IIYICVEq8MX0D0HSFlNUK6lGNxGt7KLk8s8LKvUf9KVyJ7hU:u2FCn8MZyFlulGNxGt7KLyeymw
MD5 SHA1 SHA512 SSDEEP

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DB1

Path C:\Users\Admin\AppData\Local\Temp\DB1
Size 48KB
SHA256 c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a
MD5 349e6eb110e34a08924d92f6b334801d
SHA1 bdfb289daff51890cc71697b6322aa4b35ec9169
SHA512 2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574
SSDEEP 96:uRMKLyeymwxCn8MZyFlSynlbiXyKwt8hG:uRkxGOXnlbibhG
MD5 SHA1 SHA512 SSDEEP

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memory/764-153-0x0000000007F20000-0x000000000801C000-memory.dmp

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memory/764-145-0x0000000007DD0000-0x0000000007F1E000-memory.dmp

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memory/764-154-0x0000000007F20000-0x000000000801C000-memory.dmp

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memory/4064-133-0x000000000DC80000-0x000000000DECB000-memory.dmp

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memory/4064-140-0x00000000028D9000-0x0000000002ACD000-memory.dmp

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memory/4064-135-0x00000000022DA000-0x00000000028C6000-memory.dmp

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memory/4064-130-0x00000000022DA000-0x00000000028C6000-memory.dmp

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memory/4064-132-0x00000000028D9000-0x0000000002ACD000-memory.dmp

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memory/4064-131-0x000000000DC80000-0x000000000DECB000-memory.dmp

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memory/4584-144-0x0000000001500000-0x0000000001511000-memory.dmp

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memory/4584-143-0x0000000001540000-0x000000000188A000-memory.dmp

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memory/4584-142-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/4584-139-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/4584-137-0x0000000000400000-0x000000000042B000-memory.dmp

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memory/4636-148-0x0000000000380000-0x00000000003AB000-memory.dmp

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memory/4636-147-0x00000000006E0000-0x00000000006F2000-memory.dmp

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memory/4636-150-0x0000000002440000-0x000000000278A000-memory.dmp

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memory/4636-151-0x00000000022D0000-0x0000000002360000-memory.dmp

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memory/4636-152-0x0000000000380000-0x00000000003AB000-memory.dmp

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