formbook | efb10cca23c4ed132ed9e516dee40bb2906696b91983947507cd05cb9561f6b3

Analysis

max time kernel
149s
max time network
152s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
30-09-2022 10:30

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General

Target

7241c4a2af9e08ca229912f6c95c72fe.exe
Size

475KB
MD5

7241c4a2af9e08ca229912f6c95c72fe
SHA1

2cdc9f81881cb3bfb7a825bb7c8608922a5ee311
SHA256

efb10cca23c4ed132ed9e516dee40bb2906696b91983947507cd05cb9561f6b3
SHA512

b200d33df0abf7b1dd0462a6c1a6f26f70146cc50c0976c5734b3777290e5b36462cb59f903952f6d22ce22fecf85b64da2328b8f4d5d290cce49fe1834acf53
SSDEEP

6144:lTouKrWBEu3/Z2lpGDHU3ykJ1tC/vOpBjhttFujz1rp/nkQ060AtH15Wc0:lToPWBv/cpGrU3y8tGvo18X/XZn5X0

Score

10^/10

formbook xloader u8ow loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

u8ow

Decoy

j5a7vTwyeK/qHg==

M2qzs6QwZ5sVSqCc

7KoU1t9NdRnqZ8ML+cB8x38C

pgeKvdoqNNao7Cr94QiDuw==

/QZJhRORtafU/zeqK4o+

2JvqeTAGpQBYdqgXoA4=

5zJ7fa0A0PgCFA==

cnq44WjiBQ5VfKgXoA4=

oAp6hcdNVbr2NaHk4QiDuw==

Z/w2v4V/zV8aVoFnW0zzSt6hYjbD

WJ74K7ehJCNed6gXoA4=

hCRY0pmWSLhPzeTztw==

ZNhbVFvL8KKYyj2udtFXr3U8T6LZeQ==

ur75Bj2XjwVNhAGA

BlhiocrRF/kDFg==

aQY19Du631WFpEg=

yGCGEReSv1T1JVmWfHwp

cvso1tUbJeLrMlhjg4Z8x38C

XmTsffB+q25IYuOWfHwp

ry8fNm8E0PgCFA==

Extracted

Family

xloader

Version

3.5

Campaign

u8ow

Decoy

j5a7vTwyeK/qHg==

M2qzs6QwZ5sVSqCc

7KoU1t9NdRnqZ8ML+cB8x38C

pgeKvdoqNNao7Cr94QiDuw==

/QZJhRORtafU/zeqK4o+

2JvqeTAGpQBYdqgXoA4=

5zJ7fa0A0PgCFA==

cnq44WjiBQ5VfKgXoA4=

oAp6hcdNVbr2NaHk4QiDuw==

Z/w2v4V/zV8aVoFnW0zzSt6hYjbD

WJ74K7ehJCNed6gXoA4=

hCRY0pmWSLhPzeTztw==

ZNhbVFvL8KKYyj2udtFXr3U8T6LZeQ==

ur75Bj2XjwVNhAGA

BlhiocrRF/kDFg==

aQY19Du631WFpEg=

yGCGEReSv1T1JVmWfHwp

cvso1tUbJeLrMlhjg4Z8x38C

XmTsffB+q25IYuOWfHwp

ry8fNm8E0PgCFA==

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
Executes dropped EXE 1 IoCs

Processes:

fuwusylazeffuo.exe

pid process

1784 fuwusylazeffuo.exe

pid	process
1784	fuwusylazeffuo.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

Processes:

fuwusylazeffuo.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Control Panel\International\Geo\Nation	fuwusylazeffuo.exe

Loads dropped DLL 11 IoCs

Processes:

7241c4a2af9e08ca229912f6c95c72fe.exefuwusylazeffuo.exefuwusylazeffuo.exeWerFault.exe

pid	process
780	7241c4a2af9e08ca229912f6c95c72fe.exe
780	7241c4a2af9e08ca229912f6c95c72fe.exe
780	7241c4a2af9e08ca229912f6c95c72fe.exe
780	7241c4a2af9e08ca229912f6c95c72fe.exe
1784	fuwusylazeffuo.exe
2008	fuwusylazeffuo.exe
1772	WerFault.exe
1772	WerFault.exe
1772	WerFault.exe
1772	WerFault.exe
1772	WerFault.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

fuwusylazeffuo.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\dyhkboeiqg = "C:\\Users\\Admin\\AppData\\Roaming\\vhesmtdikvlglu\\avyvaajyo.exe"	fuwusylazeffuo.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

fuwusylazeffuo.exefuwusylazeffuo.exehelp.exe

description	pid	process	target process
PID 1784 set thread context of 2008	1784	fuwusylazeffuo.exe	fuwusylazeffuo.exe
PID 2008 set thread context of 1236	2008	fuwusylazeffuo.exe	Explorer.EXE
PID 868 set thread context of 1236	868	help.exe	Explorer.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1772 1784 WerFault.exe fuwusylazeffuo.exe

pid	pid_target	process	target process
1772	1784	WerFault.exe	fuwusylazeffuo.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

help.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-2292972927-2705560509-2768824231-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	help.exe

Suspicious behavior: EnumeratesProcesses 28 IoCs

Processes:

fuwusylazeffuo.exehelp.exe

pid	process
2008	fuwusylazeffuo.exe
2008	fuwusylazeffuo.exe
2008	fuwusylazeffuo.exe
2008	fuwusylazeffuo.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe
868	help.exe

Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

fuwusylazeffuo.exehelp.exe

pid process

2008 fuwusylazeffuo.exe
2008 fuwusylazeffuo.exe
2008 fuwusylazeffuo.exe
868 help.exe
868 help.exe
868 help.exe
868 help.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

fuwusylazeffuo.exehelp.exe

description pid process

Token: SeDebugPrivilege 2008 fuwusylazeffuo.exe
Token: SeDebugPrivilege 868 help.exe
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

Explorer.EXE

pid process

1236 Explorer.EXE
1236 Explorer.EXE

description	pid	process
Token: SeDebugPrivilege	2008	fuwusylazeffuo.exe
Token: SeDebugPrivilege	868	help.exe

pid	process
1236	Explorer.EXE
1236	Explorer.EXE

pid	process
1236	Explorer.EXE
1236	Explorer.EXE

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

7241c4a2af9e08ca229912f6c95c72fe.exefuwusylazeffuo.exeExplorer.EXEhelp.exe

description	pid	process	target process
PID 780 wrote to memory of 1784	780	7241c4a2af9e08ca229912f6c95c72fe.exe	fuwusylazeffuo.exe
PID 780 wrote to memory of 1784	780	7241c4a2af9e08ca229912f6c95c72fe.exe	fuwusylazeffuo.exe
PID 780 wrote to memory of 1784	780	7241c4a2af9e08ca229912f6c95c72fe.exe	fuwusylazeffuo.exe
PID 780 wrote to memory of 1784	780	7241c4a2af9e08ca229912f6c95c72fe.exe	fuwusylazeffuo.exe
PID 1784 wrote to memory of 2008	1784	fuwusylazeffuo.exe	fuwusylazeffuo.exe
PID 1784 wrote to memory of 2008	1784	fuwusylazeffuo.exe	fuwusylazeffuo.exe
PID 1784 wrote to memory of 2008	1784	fuwusylazeffuo.exe	fuwusylazeffuo.exe
PID 1784 wrote to memory of 2008	1784	fuwusylazeffuo.exe	fuwusylazeffuo.exe
PID 1784 wrote to memory of 2008	1784	fuwusylazeffuo.exe	fuwusylazeffuo.exe
PID 1784 wrote to memory of 1772	1784	fuwusylazeffuo.exe	WerFault.exe
PID 1784 wrote to memory of 1772	1784	fuwusylazeffuo.exe	WerFault.exe
PID 1784 wrote to memory of 1772	1784	fuwusylazeffuo.exe	WerFault.exe
PID 1784 wrote to memory of 1772	1784	fuwusylazeffuo.exe	WerFault.exe
PID 1236 wrote to memory of 868	1236	Explorer.EXE	help.exe
PID 1236 wrote to memory of 868	1236	Explorer.EXE	help.exe
PID 1236 wrote to memory of 868	1236	Explorer.EXE	help.exe
PID 1236 wrote to memory of 868	1236	Explorer.EXE	help.exe
PID 868 wrote to memory of 1808	868	help.exe	Firefox.exe
PID 868 wrote to memory of 1808	868	help.exe	Firefox.exe
PID 868 wrote to memory of 1808	868	help.exe	Firefox.exe
PID 868 wrote to memory of 1808	868	help.exe	Firefox.exe
PID 868 wrote to memory of 1808	868	help.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1236

C:\Users\Admin\AppData\Local\Temp\7241c4a2af9e08ca229912f6c95c72fe.exe
"C:\Users\Admin\AppData\Local\Temp\7241c4a2af9e08ca229912f6c95c72fe.exe"
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:780

C:\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
"C:\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1784

C:\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
"C:\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe"
4⤵
- Checks computer location settings
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:2008

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1784 -s 252
4⤵
- Loads dropped DLL
- Program crash
PID:1772

C:\Windows\SysWOW64\help.exe
"C:\Windows\SysWOW64\help.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:868

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1808

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
C:\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
C:\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
C:\Users\Admin\AppData\Local\Temp\quhlzrpp.f
Filesize
172KB

MD5
cb9dbd9ff987c69b17f57f621c313e52

SHA1
db0b62eb1c07a346ac161c4e6b086255f0c4b213

SHA256
58b23d9622d97157ddb9cf7c1f4b89f694a4647f22ff238cc6b4ccc32c4ad024

SHA512
582d261962572be24972239f692bc65cd69b410dafbae550858a6d87986e978fafaf95a183449cdf82c9a64ce90a32db0a0267580259e00dc751c676c3776884

Download Submit
C:\Users\Admin\AppData\Local\Temp\wwpwcbjhcxl.uwe
Filesize
6KB

MD5
62a9b361c89112dcb9e46476b5f12331

SHA1
8ea7603b6d6db984351684b08ff52ce28a50d3e3

SHA256
66b19f4ba0ef9307c5da82840f3d85856cc852c96912ae4cb29944d30ea57538

SHA512
a7fa474a4963111984e423138bae5652b0f8726eddcf2af1cbdae8ff6ea346904ca93879ae6a291b9928af6b29ca00a2a1523465890725f81c64d134c0970e5e

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
\Users\Admin\AppData\Local\Temp\fuwusylazeffuo.exe
Filesize
56KB

MD5
ce262c598fed05331ed24e0d44fab549

SHA1
855a97836d6c47e7a4f6e9d702ac75adec755ea9

SHA256
ff821e285da8c69105815df6e9f2bd04ad88ebcc6b881f59e9592e5bd62e25c1

SHA512
8cd7b56cce82c801263546421db71815e84d2cd7894124761c2ce1ec49be28fa47e6751896a3aef1b0e21f2c4fef5c88d230f0b7fb7b0b67abc49bc1a3a5440c

Download Submit
memory/780-54-0x0000000076321000-0x0000000076323000-memory.dmp

Filesize
8KB

Download
memory/868-81-0x00000000000C0000-0x00000000000EB000-memory.dmp

Filesize
172KB

Download
memory/868-80-0x0000000000830000-0x0000000000B33000-memory.dmp

Filesize
3.0MB

Download
memory/868-84-0x00000000000C0000-0x00000000000EB000-memory.dmp

Filesize
172KB

Download
memory/868-82-0x0000000000580000-0x000000000060F000-memory.dmp

Filesize
572KB

Download
memory/868-78-0x0000000000000000-mapping.dmp

Download
memory/868-79-0x0000000000820000-0x0000000000826000-memory.dmp

Filesize
24KB

Download
memory/1236-85-0x0000000006DA0000-0x0000000006F1A000-memory.dmp

Filesize
1.5MB

Download
memory/1236-83-0x0000000006DA0000-0x0000000006F1A000-memory.dmp

Filesize
1.5MB

Download
memory/1236-77-0x00000000063B0000-0x0000000006508000-memory.dmp

Filesize
1.3MB

Download
memory/1772-68-0x0000000000000000-mapping.dmp

Download
memory/1784-59-0x0000000000000000-mapping.dmp

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memory/2008-76-0x0000000000260000-0x0000000000270000-memory.dmp

Filesize
64KB

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memory/2008-75-0x0000000000400000-0x000000000042B000-memory.dmp

Filesize
172KB

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memory/2008-74-0x00000000008C0000-0x0000000000BC3000-memory.dmp

Filesize
3.0MB

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memory/2008-66-0x000000000041FEA0-mapping.dmp

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