formbook | 2c6f3126b960f02205390cf54a74de6e32d53cc1d6db64cc4744c9cca63ecca6

Analysis

max time kernel
152s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
28/06/2022, 19:20

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General

Target
tmp.exe
Size 533KB
Sample220628-x19jdsdfb3
SHA256 2c6f3126b960f02205390cf54a74de6e32d53cc1d6db64cc4744c9cca63ecca6
MD5 2ca4db9e581608faaacdd0533b4fd783
SHA1 78065a3d2fdc96c1c9de15a1ca7e39cd96be1137
SHA512 fcd201fd15e2133052b24b786131d0adb877ba979ce3aedfbb52596dd7636ceb7194df7f1acc5a6d8be1d6fd8e1faea152e2073495fbacadf38728dddbafc847
MD5 SHA1 SHA512

Score

10^/10

formbook xloader iewb loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

Campaign

iewb

Decoy

n8FLlgIlb1rSEg5hJ9xMbw4hcmR38Q==
5vIAIY+pt81OtWs+FdIEdk7Y
LHIKc+oWGIQUUlfAAtEEdk7Y
ePM/cX2jvHrS
5hvPEw22+fdvmJz3C8FIVq0=
mb9EeX2jvHrS
Dx2zIYNvfjo8VUo5
6jVPnyJekv2RAc4gLKNwEqQ=
KWatHyjdE5Gj1Ng=
t9lk70gzUAZty4qjbVjF
6eUBeFPzKBWT125BFNIEdk7Y
dZUXOIyqTJGj1Ng=
iL3TVh2Jl5QVStnzxcAhIL8=
J1prtyklUfZGR/xDD71IbkWRd2yx
s9FgCOBRW9bU0Y6jbVjF
RYCbQDzcFBhcylgu
Fl0BV/8RJm6F9QRg8LXXTLo=
0dhumHzrCCZ3wdQg7nFF1AlL6Tk=
xvL+iL6wwX+/wH9K4lbZ/A==
N0lVceIFD5Gj1Ng=
5/mnQbHhJ7IzcYjyQbXXTLo=
luHuIKrfNeUkJOfRV0dA8o3Ghkt95g==
yuh2thpBWtHl2ZV48rXXTLo=
ADcuaODkD5eytord4lbZ/A==
PIWRAgq8/zx4aipDyILc
TdUPJBksRZU=
NorCQjrrH5Gj1Ng=
WXUOku0EDZGj1Ng=
4w8mrX8lanCcoWZLU0SkkkSRd2yx
KIYkq/0QN5gPTFK37XszY0fa
s8lIykhdVZjlEA1g8LXXTLo=
AkBw4LE9RQNHkyRsMQ==
fLzVWEjyMarikyRsMQ==
6j1f2ZsFFRpcylgu
zu3YwbBReoIuUh1vdsGonTCDfw==
EGD0PEju53oDSuwu9765d/4KSkXU3Qxh
rc0aZhksRZU=
Un//ZcCsqyaNtEcnt6mLu7Lqdw==
V4Eqwh4FEHqIflW508EYzYSbOeC5
EiWpwJgAFRV5e1r60cAEdk7Y
VW8Pf9PN65HU1otP4lbZ/A==
FFdOyJcMGxpcylgu
KztLpY85vJkLFw==
yh8vtO4GRPQ2kyRsMQ==
qMfrSiqZvghLUyRy/7XXTLo=
eKTGPwmf3swEq2Y3
aoseYSTrlPsvGQ==
Z6tKw0RfgS5+1o6jbVjF
CyU0azDFBZGj1Ng=
7Cy+5co/ZZbhC8dW6eo=
LXmN0EJimQWHylwnbTS6afIlJZHj+Q==
2R2cFWiX1hlZYz2UKh4i12ikiTP55p5Bfg==
jqHcD+eAi5EYlVrJm0TN
cqO55WilyvQ9mG1P4lbZ/A==
BERqtpY6pZDbB8dW6eo=
VpzDHQBueZvY24qjbVjF
OWUELQ6s28NVxom7evrIPfCLfw==
5iO6Dg619fIVQz+Q3I+ZMdmwry4=
d6GiFh7QJaHO2Jxz8bXXTLo=
NlFh6bdVeihxxT1MH+A+TL3MaA==
0PWJHpPJ9zh3nasMO8FIVq0=
19Fom6FBSQ1QrMU=
aYWBmw6431DfHsdW6eo=
Jj7U++2X3M4Eq2Y3
mounscape.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
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
suricata

Xloader Payload 4 IoCs

rat

resource	yara_rule
behavioral2/memory/3692-136-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3692-142-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/3876-145-0x0000000000810000-0x000000000083C000-memory.dmp	xloader
behavioral2/memory/3876-149-0x0000000000810000-0x000000000083C000-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	raserver.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\TPX0VDUP = "C:\\Program Files (x86)\\P1b9\\Cookiesan5hz.exe"	raserver.exe

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-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	tmp.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 4196 set thread context of 3692	4196	tmp.exe	88
PID 3692 set thread context of 2940	3692	tmp.exe	50
PID 3876 set thread context of 2940	3876	raserver.exe	50

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\P1b9\Cookiesan5hz.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\P1b9\Cookiesan5hz.exe	raserver.exe
File opened for modification	C:\Program Files (x86)\P1b9	Explorer.EXE
File created	C:\Program Files (x86)\P1b9\Cookiesan5hz.exe	Explorer.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	raserver.exe

Suspicious behavior: EnumeratesProcesses 46 IoCs

pid	Process
3692	tmp.exe
3692	tmp.exe
3692	tmp.exe
3692	tmp.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2940	Explorer.EXE

Suspicious behavior: MapViewOfSection 7 IoCs

pid	Process
3692	tmp.exe
3692	tmp.exe
3692	tmp.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe
3876	raserver.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3692	tmp.exe
Token: SeDebugPrivilege	3876	raserver.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4196 wrote to memory of 3692	4196	tmp.exe	88
PID 4196 wrote to memory of 3692	4196	tmp.exe	88
PID 4196 wrote to memory of 3692	4196	tmp.exe	88
PID 4196 wrote to memory of 3692	4196	tmp.exe	88
PID 4196 wrote to memory of 3692	4196	tmp.exe	88
PID 4196 wrote to memory of 3692	4196	tmp.exe	88
PID 2940 wrote to memory of 3876	2940	Explorer.EXE	89
PID 2940 wrote to memory of 3876	2940	Explorer.EXE	89
PID 2940 wrote to memory of 3876	2940	Explorer.EXE	89
PID 3876 wrote to memory of 2036	3876	raserver.exe	90
PID 3876 wrote to memory of 2036	3876	raserver.exe	90
PID 3876 wrote to memory of 2036	3876	raserver.exe	90
PID 3876 wrote to memory of 3748	3876	raserver.exe	92
PID 3876 wrote to memory of 3748	3876	raserver.exe	92
PID 3876 wrote to memory of 3748	3876	raserver.exe	92
PID 3876 wrote to memory of 5108	3876	raserver.exe	94
PID 3876 wrote to memory of 5108	3876	raserver.exe	94
PID 3876 wrote to memory of 5108	3876	raserver.exe	94
PID 3876 wrote to memory of 2416	3876	raserver.exe	96
PID 3876 wrote to memory of 2416	3876	raserver.exe	96
PID 3876 wrote to memory of 2416	3876	raserver.exe	96
PID 2940 wrote to memory of 3920	2940	Explorer.EXE	97
PID 2940 wrote to memory of 3920	2940	Explorer.EXE	97
PID 2940 wrote to memory of 3920	2940	Explorer.EXE	97

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2940
- 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:4196
- - 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:3692
- C:\Windows\SysWOW64\raserver.exe
  "C:\Windows\SysWOW64\raserver.exe"
  2⤵
  - Adds policy Run key to start application
  - 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:3876
- - C:\Windows\SysWOW64\cmd.exe
    /c del "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    3⤵
    PID:2036
- - 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:3748
- - 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:5108
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:2416
- C:\Program Files (x86)\P1b9\Cookiesan5hz.exe
  "C:\Program Files (x86)\P1b9\Cookiesan5hz.exe"
  2⤵
  PID:3920

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

Query Registry

T1012

System Information Discovery

T1082

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/2940-140-0x0000000008C20000-0x0000000008D9F000-memory.dmp

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memory/2940-150-0x0000000008E70000-0x0000000008FA2000-memory.dmp

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memory/2940-148-0x0000000008E70000-0x0000000008FA2000-memory.dmp

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memory/3692-136-0x0000000000400000-0x000000000042C000-memory.dmp

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memory/3692-139-0x0000000001840000-0x0000000001851000-memory.dmp

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memory/3692-138-0x00000000014F0000-0x000000000183A000-memory.dmp

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memory/3692-142-0x0000000000400000-0x000000000042C000-memory.dmp

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memory/3876-146-0x0000000002700000-0x0000000002A4A000-memory.dmp

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memory/3876-145-0x0000000000810000-0x000000000083C000-memory.dmp

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memory/3876-144-0x0000000000360000-0x000000000037F000-memory.dmp

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memory/3876-147-0x0000000002620000-0x00000000026B0000-memory.dmp

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memory/3876-149-0x0000000000810000-0x000000000083C000-memory.dmp

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memory/4196-134-0x0000000007DE0000-0x0000000007E7C000-memory.dmp

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memory/4196-133-0x0000000005530000-0x000000000553A000-memory.dmp

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memory/4196-130-0x0000000000AE0000-0x0000000000B6C000-memory.dmp

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memory/4196-132-0x0000000005550000-0x00000000055E2000-memory.dmp

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memory/4196-131-0x0000000005A60000-0x0000000006004000-memory.dmp

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