e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5

Analysis

max time kernel
146s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2022 17:34

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General

Target

e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe
Size

202KB
MD5

acc5cc302ef1db44090ff734b6467e53
SHA1

f539e077325e8df0da44fd7caaae7755a8fc2b67
SHA256

e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5
SHA512

5d9ad2526638c1e65c7236a94189634e77c84dd010a7776acf64e9f02a693fc398f5f2d0112b0825b70118e3bc5e2f1a61653936deab2993dc012031b0906442
SSDEEP

3072:NK4pAKaF0+xVf/qLkmpZ+rjmuHLBKeAYs5FT0nvvgJZdsVNwoCv:NlaF0uV6LkmLgmbws5FT0ngJZ6Nwoc

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

4936 steamwebhelper.exe

pid	process
4936	steamwebhelper.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:

e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	steamwebhelper.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exesteamwebhelper.exe

pid process

4892 e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe
4936 steamwebhelper.exe

pid	process
4892	e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe
4936	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	4892	e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe
Token: SeDebugPrivilege	4936	steamwebhelper.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe

description	pid	process	target process
PID 4892 wrote to memory of 4936	4892	e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe	steamwebhelper.exe
PID 4892 wrote to memory of 4936	4892	e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe	steamwebhelper.exe
PID 4892 wrote to memory of 4936	4892	e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe
"C:\Users\Admin\AppData\Local\Temp\e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4892

C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe
"C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4936

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

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Downloads

C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe
Filesize
202KB

MD5
acc5cc302ef1db44090ff734b6467e53

SHA1
f539e077325e8df0da44fd7caaae7755a8fc2b67

SHA256
e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5

SHA512
5d9ad2526638c1e65c7236a94189634e77c84dd010a7776acf64e9f02a693fc398f5f2d0112b0825b70118e3bc5e2f1a61653936deab2993dc012031b0906442

Download Submit
C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe
Filesize
202KB

MD5
acc5cc302ef1db44090ff734b6467e53

SHA1
f539e077325e8df0da44fd7caaae7755a8fc2b67

SHA256
e8861345662885f0b056f5046ed701ba0f5b1db3875464ec86da5bb1244a02a5

SHA512
5d9ad2526638c1e65c7236a94189634e77c84dd010a7776acf64e9f02a693fc398f5f2d0112b0825b70118e3bc5e2f1a61653936deab2993dc012031b0906442

Download Submit
memory/4892-132-0x0000000000F40000-0x0000000000F78000-memory.dmp

Filesize
224KB

Download
memory/4892-133-0x0000000006130000-0x00000000066D4000-memory.dmp

Filesize
5.6MB

Download
memory/4892-134-0x00000000059D0000-0x0000000005A62000-memory.dmp

Filesize
584KB

Download
memory/4892-135-0x0000000005960000-0x000000000596A000-memory.dmp

Filesize
40KB

Download
memory/4936-136-0x0000000000000000-mapping.dmp

Download