21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981

Analysis

max time kernel
65s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
01-12-2022 10:30

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General

Target

21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe
Size

723KB
MD5

a8fc35182eb14e4eb60a296acdbe2304
SHA1

76812d9eb58503a65feaa4d4cce64e34c935672d
SHA256

21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981
SHA512

af6ef6d5106a707b957646a400fa49cb4b1cbf6bff1fc05a43f6beba139599c449a18ac4b21e76c2e25c036c8ec89db01825540ef690a2d8d851d8a9d70fd98a
SSDEEP

12288:Pv9PkFUW0AHFe/v00KxdZoZundbyp8bWx5sXUFFrTKn6XSKMDGUC4i2JX:XeUW0kg38dbddWx7rTWLbPCdOX

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4976	EcomService.tao.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x0004000000022de7-136.dat	upx
behavioral2/files/0x0004000000022de7-137.dat	upx
behavioral2/memory/4976-138-0x0000000000400000-0x0000000000467000-memory.dmp	upx

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Pastf4N3a.sys	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 4 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Internet Explorer\IESettingSync	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe

Modifies Internet Explorer start page 1 TTPs 1 IoCs

stealer

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Start Page = "http://www.wz123.com/?nuli"	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe

Suspicious behavior: LoadsDriver 2 IoCs

pid	Process
640	Process not Found
640	Process not Found

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4964	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe
4964	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe
4964	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe
4964	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4964 wrote to memory of 4976	4964	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe	81
PID 4964 wrote to memory of 4976	4964	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe	81
PID 4964 wrote to memory of 4976	4964	21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe	81

C:\Users\Admin\AppData\Local\Temp\21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe
"C:\Users\Admin\AppData\Local\Temp\21a9f2104839b5efc46fec3f9b68f64d9c48981bd35c0e72a77e03de34062981.exe"
1⤵
- Drops file in System32 directory
- Modifies Internet Explorer settings
- Modifies Internet Explorer start page
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4964
- C:\Windows\Temp\EcomService.tao.exe
  C:\Windows\Temp\EcomService.tao.exe wujtaocommand
  2⤵
  - Executes dropped EXE
  PID:4976

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Temp\EcomService.tao.exe

Filesize
155KB

MD5
1951f1414879ee951708fecd93f9af67

SHA1
98c36524ffd9cc9c133e01438025c4a064338474

SHA256
0c31d184a8ca4d4d4ed087c9fadac877ee324462ed253fc5d12a0afac83eb07c

SHA512
e96a2b25300480d9c6068bf9acd267a02459d20b6bb659f49bec829b0ba3b03f546641b4aeb39fa412b42d985c1bbe88e10b781f1051e13e47d290f2c3711aaf

Download Submit
C:\Windows\Temp\EcomService.tao.exe

Filesize
155KB

MD5
1951f1414879ee951708fecd93f9af67

SHA1
98c36524ffd9cc9c133e01438025c4a064338474

SHA256
0c31d184a8ca4d4d4ed087c9fadac877ee324462ed253fc5d12a0afac83eb07c

SHA512
e96a2b25300480d9c6068bf9acd267a02459d20b6bb659f49bec829b0ba3b03f546641b4aeb39fa412b42d985c1bbe88e10b781f1051e13e47d290f2c3711aaf

Download Submit
memory/4976-138-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads