formbook | 64a8c9065258f70f7567b5d52da2738c6e63580cc64a95273b454f45addf50f5

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
29-01-2023 03:18

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General

Target

tmp.exe
Size

228KB
MD5

8b37c8c2c2beefd373d98526c700109a
SHA1

e5acac1ffd8ced2e30313a0e93129524dd91c952
SHA256

64a8c9065258f70f7567b5d52da2738c6e63580cc64a95273b454f45addf50f5
SHA512

f41ff902b633f2119c584290f3089922a828d546b1a484659225d2426c70f961993e305c911896d1abf738d87bfcd31dc51d18b1d9e692099d74644e6b2963eb
SSDEEP

6144:/Ya6qkxtNGqZnjsvzTXRDK6wgQ7js0YXQzf8PWFJMNXYSZm3k:/YUkEqZQH9KJgis0uRYSYk

Score

10^/10

formbook xloader u8ow loader persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

u8ow

Decoy

uzhDDUNgg10rOh8rkUMGYiLuNnRWl9gwMQ==

bfkA4IUaSgYi7IA=

ezX5yHeR21O3h2RCgQ==

x3E4ntHeLMGQm0kdTi6PJtjOVS6Em8UaKA==

xJuAYwcZLAfqrVazWjvkirgFxDSf

qrGugLdannLYegX5dCtFMA==

i61nMddueAYi7IA=

RoNMKNhtdDWpeiYoaB37TPiHTLo=

RFj3UHHrDtAktSZhYku36opnsaMbNA==

lx0g+6RPl4jwwNPRPuTD

MyEQ4oGk6vXrMM4V

0IVWH0rfKe1J4nn6J9XB

SYVlN3Zrnq2OaWpDiQ==

fNa0jy3P8KQK25rpmwqd0t8=

UZuSZpW+9ffX9KXzmgqd0t8=

Vxf85YCWvYNZjkcDdCtFMA==

0gG1EzLP7/DrMM4V

WExRGVAEE6YS5tJkTxMhR636+A==

6Tv7U4QdURt1KUI+gw==

ooR7RXgsXPtaEutnaQ3efjIXmfJePavzIA==

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

Processes:

resource	yara_rule
behavioral2/memory/1132-139-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/1132-144-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/728-147-0x00000000006F0000-0x000000000071C000-memory.dmp	xloader
behavioral2/memory/728-151-0x00000000006F0000-0x000000000071C000-memory.dmp	xloader

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

NETSTAT.EXE

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\LNG4IR5XF0HT = "C:\\Program Files (x86)\\S2d0lwvo0\\hpiefj8pnzx.exe"	NETSTAT.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	NETSTAT.EXE

Executes dropped EXE 3 IoCs

Processes:

rlgffyq.exerlgffyq.exehpiefj8pnzx.exe

pid process

3408 rlgffyq.exe
1132 rlgffyq.exe
1452 hpiefj8pnzx.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:

rlgffyq.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation rlgffyq.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

pid	process
3408	rlgffyq.exe
1132	rlgffyq.exe
1452	hpiefj8pnzx.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	rlgffyq.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

rlgffyq.exerlgffyq.exeNETSTAT.EXE

description	pid	process	target process
PID 3408 set thread context of 1132	3408	rlgffyq.exe	rlgffyq.exe
PID 1132 set thread context of 2376	1132	rlgffyq.exe	Explorer.EXE
PID 728 set thread context of 2376	728	NETSTAT.EXE	Explorer.EXE

Drops file in Program Files directory 4 IoCs

Processes:

Explorer.EXENETSTAT.EXE

description	ioc	process
File opened for modification	C:\Program Files (x86)\S2d0lwvo0\hpiefj8pnzx.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\S2d0lwvo0\hpiefj8pnzx.exe	NETSTAT.EXE
File opened for modification	C:\Program Files (x86)\S2d0lwvo0	Explorer.EXE
File created	C:\Program Files (x86)\S2d0lwvo0\hpiefj8pnzx.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

4924 1452 WerFault.exe hpiefj8pnzx.exe
Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command-Line Interface
T1059

Processes:

NETSTAT.EXE

pid process

728 NETSTAT.EXE

pid	pid_target	process	target process
4924	1452	WerFault.exe	hpiefj8pnzx.exe

pid	process
728	NETSTAT.EXE

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

NETSTAT.EXE

description	ioc	process
Key created	\Registry\User\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	NETSTAT.EXE

Suspicious behavior: EnumeratesProcesses 58 IoCs

Processes:

rlgffyq.exeNETSTAT.EXE

pid	process
1132	rlgffyq.exe
1132	rlgffyq.exe
1132	rlgffyq.exe
1132	rlgffyq.exe
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2376 Explorer.EXE
Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

rlgffyq.exerlgffyq.exeNETSTAT.EXE

pid process

3408 rlgffyq.exe
1132 rlgffyq.exe
1132 rlgffyq.exe
1132 rlgffyq.exe
728 NETSTAT.EXE
728 NETSTAT.EXE
728 NETSTAT.EXE
728 NETSTAT.EXE

pid	process
2376	Explorer.EXE

pid	process
3408	rlgffyq.exe
1132	rlgffyq.exe
1132	rlgffyq.exe
1132	rlgffyq.exe
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE
728	NETSTAT.EXE

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

rlgffyq.exeNETSTAT.EXEExplorer.EXE

description	pid	process
Token: SeDebugPrivilege	1132	rlgffyq.exe
Token: SeDebugPrivilege	728	NETSTAT.EXE
Token: SeShutdownPrivilege	2376	Explorer.EXE
Token: SeCreatePagefilePrivilege	2376	Explorer.EXE

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

tmp.exerlgffyq.exeExplorer.EXENETSTAT.EXE

description	pid	process	target process
PID 2564 wrote to memory of 3408	2564	tmp.exe	rlgffyq.exe
PID 2564 wrote to memory of 3408	2564	tmp.exe	rlgffyq.exe
PID 2564 wrote to memory of 3408	2564	tmp.exe	rlgffyq.exe
PID 3408 wrote to memory of 1132	3408	rlgffyq.exe	rlgffyq.exe
PID 3408 wrote to memory of 1132	3408	rlgffyq.exe	rlgffyq.exe
PID 3408 wrote to memory of 1132	3408	rlgffyq.exe	rlgffyq.exe
PID 3408 wrote to memory of 1132	3408	rlgffyq.exe	rlgffyq.exe
PID 2376 wrote to memory of 728	2376	Explorer.EXE	NETSTAT.EXE
PID 2376 wrote to memory of 728	2376	Explorer.EXE	NETSTAT.EXE
PID 2376 wrote to memory of 728	2376	Explorer.EXE	NETSTAT.EXE
PID 728 wrote to memory of 2728	728	NETSTAT.EXE	cmd.exe
PID 728 wrote to memory of 2728	728	NETSTAT.EXE	cmd.exe
PID 728 wrote to memory of 2728	728	NETSTAT.EXE	cmd.exe
PID 728 wrote to memory of 4376	728	NETSTAT.EXE	cmd.exe
PID 728 wrote to memory of 4376	728	NETSTAT.EXE	cmd.exe
PID 728 wrote to memory of 4376	728	NETSTAT.EXE	cmd.exe
PID 728 wrote to memory of 4008	728	NETSTAT.EXE	cmd.exe
PID 728 wrote to memory of 4008	728	NETSTAT.EXE	cmd.exe
PID 728 wrote to memory of 4008	728	NETSTAT.EXE	cmd.exe
PID 728 wrote to memory of 764	728	NETSTAT.EXE	Firefox.exe
PID 728 wrote to memory of 764	728	NETSTAT.EXE	Firefox.exe
PID 728 wrote to memory of 764	728	NETSTAT.EXE	Firefox.exe
PID 2376 wrote to memory of 1452	2376	Explorer.EXE	hpiefj8pnzx.exe
PID 2376 wrote to memory of 1452	2376	Explorer.EXE	hpiefj8pnzx.exe
PID 2376 wrote to memory of 1452	2376	Explorer.EXE	hpiefj8pnzx.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Drops file in Program Files directory
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2376

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2564

C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
"C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe" C:\Users\Admin\AppData\Local\Temp\mewbf.gv
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3408

C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
"C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe"
4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:1132

C:\Windows\SysWOW64\NETSTAT.EXE
"C:\Windows\SysWOW64\NETSTAT.EXE"
2⤵
- Adds policy Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Gathers network information
- Modifies Internet Explorer settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:728

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe"
3⤵
PID:2728

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:4376

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:4008

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:764

C:\Program Files (x86)\S2d0lwvo0\hpiefj8pnzx.exe
"C:\Program Files (x86)\S2d0lwvo0\hpiefj8pnzx.exe"
2⤵
- Executes dropped EXE
PID:1452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1452 -s 340
3⤵
- Program crash
PID:4924

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1452 -ip 1452
1⤵
PID:1824

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Command-Line Interface

T1059

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

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\S2d0lwvo0\hpiefj8pnzx.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Program Files (x86)\S2d0lwvo0\hpiefj8pnzx.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
40KB

MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
Filesize
48KB

MD5
349e6eb110e34a08924d92f6b334801d

SHA1
bdfb289daff51890cc71697b6322aa4b35ec9169

SHA256
c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

SHA512
2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

Download Submit
C:\Users\Admin\AppData\Local\Temp\mewbf.gv
Filesize
5KB

MD5
3c244d8bf6174dbc41727abc9ece7acf

SHA1
797f05cbef6c579880841488a2ef85a8064db9fa

SHA256
fa3e5994908aed3ee28a15d4f45f396603fd9026db11a342a90c590f5d48a85b

SHA512
93030940192dcbe0e83895c89de7d57998199fdd6dc71d4dd76d62b2fbadff9aa2a43aea5797bc3d1b17afeda64104a202bde6255647f04a6cb42b8f5282b253

Download Submit
C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Users\Admin\AppData\Local\Temp\rlgffyq.exe
Filesize
6KB

MD5
44a7bf46a9c01d3e0486c93767b6cc0f

SHA1
3cc13566319f0d73f4931a101799862907cd361d

SHA256
b016acfefe7a25f43ec9f9e89bff4d03ea9470941e283b10599acb6769cf76b9

SHA512
e36053cba4c316a26a72857959c12db9813f1c1187c03d2ecfb545fb54fde6286302054b353a6aead3bb15429ffb6bc2d1bee68cb65cf8df7c0994ff3ffe0602

Download Submit
C:\Users\Admin\AppData\Local\Temp\zkoclolbinv.obd
Filesize
196KB

MD5
7ae7dcc7e63caee1fd3da08154fa103d

SHA1
c2c152ce21732ad9be3c06d28de2aa28340a095a

SHA256
5395f4b1e2cdd4ab2cc06957df8e8f4264cfea3fbd7e6970ab9e9a6f0ff2d58b

SHA512
c707b92084a8bde6c11bfa36519389c017cda33b8e1223a116e3055549d7c713f05d16113f739e466c9d3d03dbc8b32058eee43c3caace8e8a6ab4adfb6c232b

Download Submit
memory/728-146-0x0000000000230000-0x000000000023B000-memory.dmp

Filesize
44KB

Download
memory/728-151-0x00000000006F0000-0x000000000071C000-memory.dmp

Filesize
176KB

Download
memory/728-143-0x0000000000000000-mapping.dmp

Download
memory/728-149-0x0000000000D10000-0x0000000000DA0000-memory.dmp

Filesize
576KB

Download
memory/728-148-0x0000000000FE0000-0x000000000132A000-memory.dmp

Filesize
3.3MB

Download
memory/728-147-0x00000000006F0000-0x000000000071C000-memory.dmp

Filesize
176KB

Download
memory/1132-139-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1132-144-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1132-141-0x0000000000E70000-0x0000000000E81000-memory.dmp

Filesize
68KB

Download
memory/1132-140-0x00000000009B0000-0x0000000000CFA000-memory.dmp

Filesize
3.3MB

Download
memory/1132-137-0x0000000000000000-mapping.dmp

Download
memory/1452-157-0x0000000000000000-mapping.dmp

Download
memory/2376-150-0x0000000003240000-0x00000000032FC000-memory.dmp

Filesize
752KB

Download
memory/2376-142-0x00000000033C0000-0x00000000034EA000-memory.dmp

Filesize
1.2MB

Download
memory/2376-152-0x0000000003240000-0x00000000032FC000-memory.dmp

Filesize
752KB

Download
memory/2728-145-0x0000000000000000-mapping.dmp

Download
memory/3408-132-0x0000000000000000-mapping.dmp

Download
memory/4008-155-0x0000000000000000-mapping.dmp

Download
memory/4376-153-0x0000000000000000-mapping.dmp

Download