formbook | b220568343b62f6a4bb4abc001ddfd4a00b66c9debe0542c55f6f2a91cd832bf

General

Target

sof.exe
Size

262KB
MD5

512fcd3048ecc3311759e82e00c9888d
SHA1

be45965664140ed3a03236605f4b8c9ed7bfcc47
SHA256

b220568343b62f6a4bb4abc001ddfd4a00b66c9debe0542c55f6f2a91cd832bf
SHA512

1faac492c0a7fa1744c5a70b506d0b1d1e950c03b00e5a152bbe4a6ccb2237f6bb8ef6035839e1d976e1f228da2f0f1c1c4dec3d4f82bbc35659fe60e0625034
SSDEEP

6144:/Ya6Wa8RQeZcz5jHeU1NNWGYugdRUPmzDq9I+H:/YoaKcz5HeeNcGFgdRUGm95H

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 3 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/448-139-0x0000000000400000-0x000000000042C000-memory.dmp	xloader
behavioral2/memory/1048-145-0x00000000012E0000-0x000000000130C000-memory.dmp	xloader
behavioral2/memory/1048-150-0x00000000012E0000-0x000000000130C000-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:

raserver.exe

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\FPXHYH = "C:\\Program Files (x86)\\Fetn8\\chkdskinmllxix.exe"	raserver.exe

Executes dropped EXE 2 IoCs

Processes:

kmgzaumv.exekmgzaumv.exe

pid process

1176 kmgzaumv.exe
448 kmgzaumv.exe

pid	process
1176	kmgzaumv.exe
448	kmgzaumv.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:

kmgzaumv.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	kmgzaumv.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

Processes:

kmgzaumv.exekmgzaumv.exeraserver.exe

description	pid	process	target process
PID 1176 set thread context of 448	1176	kmgzaumv.exe	kmgzaumv.exe
PID 448 set thread context of 2664	448	kmgzaumv.exe	Explorer.EXE
PID 1048 set thread context of 2664	1048	raserver.exe	Explorer.EXE

Drops file in Program Files directory 1 IoCs

Processes:

raserver.exe

description ioc process

File opened for modification C:\Program Files (x86)\Fetn8\chkdskinmllxix.exe raserver.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Program Files (x86)\Fetn8\chkdskinmllxix.exe	raserver.exe

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

raserver.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	raserver.exe

Suspicious behavior: EnumeratesProcesses 58 IoCs

Processes:

kmgzaumv.exeraserver.exe

pid	process
448	kmgzaumv.exe
448	kmgzaumv.exe
448	kmgzaumv.exe
448	kmgzaumv.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2664 Explorer.EXE
Suspicious behavior: MapViewOfSection 8 IoCs

Processes:

kmgzaumv.exekmgzaumv.exeraserver.exe

pid process

1176 kmgzaumv.exe
448 kmgzaumv.exe
448 kmgzaumv.exe
448 kmgzaumv.exe
1048 raserver.exe
1048 raserver.exe
1048 raserver.exe
1048 raserver.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

kmgzaumv.exeraserver.exe

description pid process

Token: SeDebugPrivilege 448 kmgzaumv.exe
Token: SeDebugPrivilege 1048 raserver.exe

pid	process
2664	Explorer.EXE

pid	process
1176	kmgzaumv.exe
448	kmgzaumv.exe
448	kmgzaumv.exe
448	kmgzaumv.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe
1048	raserver.exe

description	pid	process
Token: SeDebugPrivilege	448	kmgzaumv.exe
Token: SeDebugPrivilege	1048	raserver.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

sof.exekmgzaumv.exeExplorer.EXEraserver.exe

description	pid	process	target process
PID 5004 wrote to memory of 1176	5004	sof.exe	kmgzaumv.exe
PID 5004 wrote to memory of 1176	5004	sof.exe	kmgzaumv.exe
PID 5004 wrote to memory of 1176	5004	sof.exe	kmgzaumv.exe
PID 1176 wrote to memory of 448	1176	kmgzaumv.exe	kmgzaumv.exe
PID 1176 wrote to memory of 448	1176	kmgzaumv.exe	kmgzaumv.exe
PID 1176 wrote to memory of 448	1176	kmgzaumv.exe	kmgzaumv.exe
PID 1176 wrote to memory of 448	1176	kmgzaumv.exe	kmgzaumv.exe
PID 2664 wrote to memory of 1048	2664	Explorer.EXE	raserver.exe
PID 2664 wrote to memory of 1048	2664	Explorer.EXE	raserver.exe
PID 2664 wrote to memory of 1048	2664	Explorer.EXE	raserver.exe
PID 1048 wrote to memory of 3920	1048	raserver.exe	cmd.exe
PID 1048 wrote to memory of 3920	1048	raserver.exe	cmd.exe
PID 1048 wrote to memory of 3920	1048	raserver.exe	cmd.exe
PID 1048 wrote to memory of 5052	1048	raserver.exe	cmd.exe
PID 1048 wrote to memory of 5052	1048	raserver.exe	cmd.exe
PID 1048 wrote to memory of 5052	1048	raserver.exe	cmd.exe
PID 1048 wrote to memory of 4512	1048	raserver.exe	cmd.exe
PID 1048 wrote to memory of 4512	1048	raserver.exe	cmd.exe
PID 1048 wrote to memory of 4512	1048	raserver.exe	cmd.exe
PID 1048 wrote to memory of 4272	1048	raserver.exe	Firefox.exe
PID 1048 wrote to memory of 4272	1048	raserver.exe	Firefox.exe
PID 1048 wrote to memory of 4272	1048	raserver.exe	Firefox.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2664

C:\Users\Admin\AppData\Local\Temp\sof.exe
"C:\Users\Admin\AppData\Local\Temp\sof.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:5004

C:\Users\Admin\AppData\Local\Temp\kmgzaumv.exe
"C:\Users\Admin\AppData\Local\Temp\kmgzaumv.exe" C:\Users\Admin\AppData\Local\Temp\yaekxhsbqrp.x
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1176

C:\Users\Admin\AppData\Local\Temp\kmgzaumv.exe
"C:\Users\Admin\AppData\Local\Temp\kmgzaumv.exe"
4⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:448

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:1048

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\kmgzaumv.exe"
3⤵
PID:3920

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:5052

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:4512

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:4272

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

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\jsgvegx.c
Filesize
196KB

MD5
20d6ca878760712ccae7ba6d652506f5

SHA1
32ff1d2ccb8dc3d02cc1556d0382dc25966c0b78

SHA256
730e5ed079f935a5bfae76720b726c0170acdb0ac0dcfef8385982b97dce7af3

SHA512
c6bdce70c57fd175c71b044bd03bcf0baca356069518386cc732f65061c7b7d876459002916dc93111d5686b9e9a715d25c4ef11586767fbec092a8df4ce1988

Download Submit
C:\Users\Admin\AppData\Local\Temp\kmgzaumv.exe
Filesize
75KB

MD5
8923600589c4af9654dc95922e6c5791

SHA1
f9d3edd089a01a4bec5700f7daa4d51d12f16981

SHA256
9adeae5c28c8b7de93fe94e3a34fe330d2c7c8c0160dc6aaf7ee6e2e917f1b03

SHA512
f68b413952bb3dca342f47ee291701f12a8617b6ef405eb40411af471ef621ed26d62378fa28055bbfcc9ac868a9220d9a9417791480a82a99d30b0299a24815

Download Submit
C:\Users\Admin\AppData\Local\Temp\kmgzaumv.exe
Filesize
75KB

MD5
8923600589c4af9654dc95922e6c5791

SHA1
f9d3edd089a01a4bec5700f7daa4d51d12f16981

SHA256
9adeae5c28c8b7de93fe94e3a34fe330d2c7c8c0160dc6aaf7ee6e2e917f1b03

SHA512
f68b413952bb3dca342f47ee291701f12a8617b6ef405eb40411af471ef621ed26d62378fa28055bbfcc9ac868a9220d9a9417791480a82a99d30b0299a24815

Download Submit
C:\Users\Admin\AppData\Local\Temp\kmgzaumv.exe
Filesize
75KB

MD5
8923600589c4af9654dc95922e6c5791

SHA1
f9d3edd089a01a4bec5700f7daa4d51d12f16981

SHA256
9adeae5c28c8b7de93fe94e3a34fe330d2c7c8c0160dc6aaf7ee6e2e917f1b03

SHA512
f68b413952bb3dca342f47ee291701f12a8617b6ef405eb40411af471ef621ed26d62378fa28055bbfcc9ac868a9220d9a9417791480a82a99d30b0299a24815

Download Submit
C:\Users\Admin\AppData\Local\Temp\yaekxhsbqrp.x
Filesize
5KB

MD5
5429138a957c0a88b28ff60b3a44167b

SHA1
55589112a809ccec8cd8a397dcdd5c8d25aaaf66

SHA256
30cc7eb96bb55d2d4337ce8676140f235a7657ddab0532d81a3916adbb6378f0

SHA512
15510bb15bc1980bd8468babefa596aa068fe0995db038a762533d0ceba2b18a1b64e3684b30d314efa2a9d9e4ea882b649d15681b0e1b0e69bcc7ee35628a70

Download Submit
memory/448-137-0x0000000000000000-mapping.dmp

Download
memory/448-139-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/448-140-0x0000000000A00000-0x0000000000D4A000-memory.dmp

Filesize
3.3MB

Download
memory/448-141-0x00000000009C0000-0x00000000009D1000-memory.dmp

Filesize
68KB

Download
memory/1048-144-0x0000000000590000-0x00000000005AF000-memory.dmp

Filesize
124KB

Download
memory/1048-145-0x00000000012E0000-0x000000000130C000-memory.dmp

Filesize
176KB

Download
memory/1048-146-0x0000000003180000-0x00000000034CA000-memory.dmp

Filesize
3.3MB

Download
memory/1048-148-0x0000000002FE0000-0x0000000003070000-memory.dmp

Filesize
576KB

Download
memory/1048-150-0x00000000012E0000-0x000000000130C000-memory.dmp

Filesize
176KB

Download
memory/1048-143-0x0000000000000000-mapping.dmp

Download
memory/1176-132-0x0000000000000000-mapping.dmp

Download
memory/2664-149-0x0000000002C70000-0x0000000002D3B000-memory.dmp

Filesize
812KB

Download
memory/2664-151-0x0000000002C70000-0x0000000002D3B000-memory.dmp

Filesize
812KB

Download
memory/2664-142-0x0000000007FB0000-0x00000000080CD000-memory.dmp

Filesize
1.1MB

Download
memory/3920-147-0x0000000000000000-mapping.dmp

Download
memory/4512-154-0x0000000000000000-mapping.dmp

Download
memory/5052-152-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads