formbook | 5f3775f376c0ba2a894657f291b45e3d9a0a9ecd6a93162141dda0b9e9bc6e04

General

Target

PAIEMENT1.exe
Size

424KB
MD5

4a40bc732ce463e10ae463ee7b890242
SHA1

090fea71d8bc7abe48ea0d36d91a38ecf49f83d8
SHA256

1ac69ae85debbb73ec8b2bc1252374eb717b757b61819a012a8eedbac1148cd5
SHA512

d0efc801cb42571030a7e4381004eb1f1e3ee2c560726d1be48b8e17c23a5a5604a2e6e142b7354219957bd37cdb2e5eb5d1c1d5748018d88e5733594e4435df

Score

10^/10

formbook xloader u9xn loader persistence rat spyware stealer suricata trojan

Malware Config

Extracted

Family

xloader

Version

2.5

Campaign

u9xn

C2

http://www.crisisinterventionadvocates.com/u9xn/

Decoy

lifeguardingcoursenearme.com

bolsaspapelcdmx.com

parsleypkllqu.xyz

68134.online

shopthatlookboutique.com

canlibahisportal.com

oligopoly.city

srchwithus.online

151motors.com

17yue.info

auntmarysnj.com

hanansalman.com

heyunshangcheng.info

doorslamersplus.com

sfcn-dng.com

highvizpeople.com

seoexpertinbangladesh.com

christinegagnonjewellery.com

artifactorie.biz

mre3.net

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

Processes:

resource	yara_rule
behavioral2/memory/3944-119-0x0000000000400000-0x0000000000429000-memory.dmp	xloader
behavioral2/memory/3944-120-0x000000000041D4F0-mapping.dmp	xloader
behavioral2/memory/4072-128-0x0000000000870000-0x0000000000899000-memory.dmp	xloader
behavioral2/memory/876-138-0x000000000041D4F0-mapping.dmp	xloader

Executes dropped EXE 2 IoCs

Processes:

edj8kzix2d9.exeedj8kzix2d9.exe

pid process

820 edj8kzix2d9.exe
876 edj8kzix2d9.exe
Loads dropped DLL 2 IoCs

Processes:

PAIEMENT1.exeedj8kzix2d9.exe

pid process

2020 PAIEMENT1.exe
820 edj8kzix2d9.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
820	edj8kzix2d9.exe
876	edj8kzix2d9.exe

pid	process
2020	PAIEMENT1.exe
820	edj8kzix2d9.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Key created	\Registry\Machine\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ZLHLS4BPN = "C:\\Program Files (x86)\\K7nrxv4\\edj8kzix2d9.exe"	explorer.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

PAIEMENT1.exePAIEMENT1.exeexplorer.exeedj8kzix2d9.exe

description	pid	process	target process
PID 2020 set thread context of 3944	2020	PAIEMENT1.exe	PAIEMENT1.exe
PID 3944 set thread context of 2416	3944	PAIEMENT1.exe	Explorer.EXE
PID 4072 set thread context of 2416	4072	explorer.exe	Explorer.EXE
PID 820 set thread context of 876	820	edj8kzix2d9.exe	edj8kzix2d9.exe

Drops file in Program Files directory 4 IoCs

Processes:

Explorer.EXEexplorer.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\K7nrxv4	Explorer.EXE
File created	C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe	Explorer.EXE
File opened for modification	C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.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

NSIS installer 6 IoCs

installer

Processes:

resource	yara_rule
C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe	nsis_installer_1
C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe	nsis_installer_2
C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe	nsis_installer_1
C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe	nsis_installer_2
C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe	nsis_installer_1
C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe	nsis_installer_2

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Key created	\Registry\User\S-1-5-21-1042495040-510797905-2613508344-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	explorer.exe

Suspicious behavior: EnumeratesProcesses 56 IoCs

Processes:

PAIEMENT1.exeexplorer.exeedj8kzix2d9.exe

pid	process
3944	PAIEMENT1.exe
3944	PAIEMENT1.exe
3944	PAIEMENT1.exe
3944	PAIEMENT1.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
876	edj8kzix2d9.exe
876	edj8kzix2d9.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe
4072	explorer.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Explorer.EXE

pid process

2416 Explorer.EXE
Suspicious behavior: MapViewOfSection 7 IoCs

Processes:

PAIEMENT1.exeexplorer.exe

pid process

3944 PAIEMENT1.exe
3944 PAIEMENT1.exe
3944 PAIEMENT1.exe
4072 explorer.exe
4072 explorer.exe
4072 explorer.exe
4072 explorer.exe

pid	process
2416	Explorer.EXE

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

PAIEMENT1.exeexplorer.exeExplorer.EXEedj8kzix2d9.exe

description	pid	process
Token: SeDebugPrivilege	3944	PAIEMENT1.exe
Token: SeDebugPrivilege	4072	explorer.exe
Token: SeShutdownPrivilege	2416	Explorer.EXE
Token: SeCreatePagefilePrivilege	2416	Explorer.EXE
Token: SeDebugPrivilege	876	edj8kzix2d9.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

PAIEMENT1.exeExplorer.EXEexplorer.exeedj8kzix2d9.exe

description	pid	process	target process
PID 2020 wrote to memory of 3944	2020	PAIEMENT1.exe	PAIEMENT1.exe
PID 2020 wrote to memory of 3944	2020	PAIEMENT1.exe	PAIEMENT1.exe
PID 2020 wrote to memory of 3944	2020	PAIEMENT1.exe	PAIEMENT1.exe
PID 2020 wrote to memory of 3944	2020	PAIEMENT1.exe	PAIEMENT1.exe
PID 2020 wrote to memory of 3944	2020	PAIEMENT1.exe	PAIEMENT1.exe
PID 2020 wrote to memory of 3944	2020	PAIEMENT1.exe	PAIEMENT1.exe
PID 2416 wrote to memory of 4072	2416	Explorer.EXE	explorer.exe
PID 2416 wrote to memory of 4072	2416	Explorer.EXE	explorer.exe
PID 2416 wrote to memory of 4072	2416	Explorer.EXE	explorer.exe
PID 4072 wrote to memory of 4156	4072	explorer.exe	cmd.exe
PID 4072 wrote to memory of 4156	4072	explorer.exe	cmd.exe
PID 4072 wrote to memory of 4156	4072	explorer.exe	cmd.exe
PID 2416 wrote to memory of 820	2416	Explorer.EXE	edj8kzix2d9.exe
PID 2416 wrote to memory of 820	2416	Explorer.EXE	edj8kzix2d9.exe
PID 2416 wrote to memory of 820	2416	Explorer.EXE	edj8kzix2d9.exe
PID 820 wrote to memory of 876	820	edj8kzix2d9.exe	edj8kzix2d9.exe
PID 820 wrote to memory of 876	820	edj8kzix2d9.exe	edj8kzix2d9.exe
PID 820 wrote to memory of 876	820	edj8kzix2d9.exe	edj8kzix2d9.exe
PID 820 wrote to memory of 876	820	edj8kzix2d9.exe	edj8kzix2d9.exe
PID 820 wrote to memory of 876	820	edj8kzix2d9.exe	edj8kzix2d9.exe
PID 820 wrote to memory of 876	820	edj8kzix2d9.exe	edj8kzix2d9.exe
PID 4072 wrote to memory of 1140	4072	explorer.exe	cmd.exe
PID 4072 wrote to memory of 1140	4072	explorer.exe	cmd.exe
PID 4072 wrote to memory of 1140	4072	explorer.exe	cmd.exe
PID 4072 wrote to memory of 1520	4072	explorer.exe	Firefox.exe
PID 4072 wrote to memory of 1520	4072	explorer.exe	Firefox.exe
PID 4072 wrote to memory of 1520	4072	explorer.exe	Firefox.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:2416

C:\Users\Admin\AppData\Local\Temp\PAIEMENT1.exe
"C:\Users\Admin\AppData\Local\Temp\PAIEMENT1.exe"
2⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2020

C:\Users\Admin\AppData\Local\Temp\PAIEMENT1.exe
"C:\Users\Admin\AppData\Local\Temp\PAIEMENT1.exe"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:3944

C:\Windows\SysWOW64\explorer.exe
"C:\Windows\SysWOW64\explorer.exe"
2⤵
- Adds 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:4072

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Users\Admin\AppData\Local\Temp\PAIEMENT1.exe"
3⤵
PID:4156

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:1140

C:\Program Files\Mozilla Firefox\Firefox.exe
"C:\Program Files\Mozilla Firefox\Firefox.exe"
3⤵
PID:1520

C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe
"C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:820

C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe
"C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:876

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe
MD5
4a40bc732ce463e10ae463ee7b890242

SHA1
090fea71d8bc7abe48ea0d36d91a38ecf49f83d8

SHA256
1ac69ae85debbb73ec8b2bc1252374eb717b757b61819a012a8eedbac1148cd5

SHA512
d0efc801cb42571030a7e4381004eb1f1e3ee2c560726d1be48b8e17c23a5a5604a2e6e142b7354219957bd37cdb2e5eb5d1c1d5748018d88e5733594e4435df

Download Submit
C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe
MD5
4a40bc732ce463e10ae463ee7b890242

SHA1
090fea71d8bc7abe48ea0d36d91a38ecf49f83d8

SHA256
1ac69ae85debbb73ec8b2bc1252374eb717b757b61819a012a8eedbac1148cd5

SHA512
d0efc801cb42571030a7e4381004eb1f1e3ee2c560726d1be48b8e17c23a5a5604a2e6e142b7354219957bd37cdb2e5eb5d1c1d5748018d88e5733594e4435df

Download Submit
C:\Program Files (x86)\K7nrxv4\edj8kzix2d9.exe
MD5
4a40bc732ce463e10ae463ee7b890242

SHA1
090fea71d8bc7abe48ea0d36d91a38ecf49f83d8

SHA256
1ac69ae85debbb73ec8b2bc1252374eb717b757b61819a012a8eedbac1148cd5

SHA512
d0efc801cb42571030a7e4381004eb1f1e3ee2c560726d1be48b8e17c23a5a5604a2e6e142b7354219957bd37cdb2e5eb5d1c1d5748018d88e5733594e4435df

Download Submit
C:\Users\Admin\AppData\Local\Temp\DB1
MD5
b608d407fc15adea97c26936bc6f03f6

SHA1
953e7420801c76393902c0d6bb56148947e41571

SHA256
b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

SHA512
cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\azz06zcwvuaf88bqq7ar
MD5
3f94f73321346d0f83de179e10d6c262

SHA1
b5d4789d9403cd2d0a130b6f3031b9c43472d975

SHA256
4bf655ce5574a046778bcff5d2cd71694bfd8ccde68307de8042559dd69747a4

SHA512
01ae3be2eb77c46c447e841209fb517e3436f2271f2812c13f95b8eff1b41a89074cf719b37548ed06a673cfb08478cee4c312b597bc8823f58c9072a0aa2be7

Download Submit
\Users\Admin\AppData\Local\Temp\nsiC0A2.tmp\mjcxbw.dll
MD5
e75fad4954d3cea12f4bbb5bf11fca90

SHA1
7ac1e5a5e1276a07660a954c8a4cf90508237bb6

SHA256
5e00724748d8300e54d0e9066d3c4bdb867609d9684f9558354f20ac65d7307b

SHA512
2a2234a864b299a8315042917840e84cf30695d5f2f54b4820dcbd08a80fe2ca8a0a8fa1b0ebd1691974ac1667d4b550d0b8911f780d967f273f48d79689ff1d

Download Submit
\Users\Admin\AppData\Local\Temp\nsr9CF4.tmp\mjcxbw.dll
MD5
e75fad4954d3cea12f4bbb5bf11fca90

SHA1
7ac1e5a5e1276a07660a954c8a4cf90508237bb6

SHA256
5e00724748d8300e54d0e9066d3c4bdb867609d9684f9558354f20ac65d7307b

SHA512
2a2234a864b299a8315042917840e84cf30695d5f2f54b4820dcbd08a80fe2ca8a0a8fa1b0ebd1691974ac1667d4b550d0b8911f780d967f273f48d79689ff1d

Download Submit
memory/820-132-0x0000000000000000-mapping.dmp

Download
memory/876-138-0x000000000041D4F0-mapping.dmp

Download
memory/876-142-0x0000000000BA0000-0x0000000000EC0000-memory.dmp

Filesize
3.1MB

Download
memory/1140-140-0x0000000000000000-mapping.dmp

Download
memory/2416-124-0x0000000004F80000-0x00000000050D0000-memory.dmp

Filesize
1.3MB

Download
memory/2416-131-0x0000000002440000-0x000000000250F000-memory.dmp

Filesize
828KB

Download
memory/3944-123-0x00000000009E0000-0x00000000009F1000-memory.dmp

Filesize
68KB

Download
memory/3944-122-0x0000000000B20000-0x0000000000E40000-memory.dmp

Filesize
3.1MB

Download
memory/3944-120-0x000000000041D4F0-mapping.dmp

Download
memory/3944-119-0x0000000000400000-0x0000000000429000-memory.dmp

Filesize
164KB

Download
memory/4072-130-0x0000000001220000-0x00000000012B0000-memory.dmp

Filesize
576KB

Download
memory/4072-129-0x0000000004E90000-0x00000000051B0000-memory.dmp

Filesize
3.1MB

Download
memory/4072-127-0x0000000001310000-0x000000000174F000-memory.dmp

Filesize
4.2MB

Download
memory/4072-128-0x0000000000870000-0x0000000000899000-memory.dmp

Filesize
164KB

Download
memory/4072-125-0x0000000000000000-mapping.dmp

Download
memory/4156-126-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads