7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99

Analysis

max time kernel
149s
max time network
153s
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 23:20

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General

Target

7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe
Size

492KB
MD5

b6086a21814f1626c574a729736ee182
SHA1

40168f043446673232927d25c012b3357497c454
SHA256

7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99
SHA512

0f2e24e1c1c72b03a51e833f99ebf3632d3caf38e21d5af67c07dc9007813632ddaeca2892cb1d6c37f26692437d0801d6b83e5578dc4370ece28ef7f8beaca5
SSDEEP

6144:1nNU7w80GPzNCsvKPCxpxz4MRVl7Myo15v5lPER0u+GIIIIIIIhIIIIIIIIIIIIq:5q7VdhO6xvR37MB5v5lsm5K

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

2536 steamwebhelper.exe

pid	process
2536	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:

7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\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:

7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exesteamwebhelper.exe

pid process

4812 7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe
2536 steamwebhelper.exe

pid	process
4812	7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe
2536	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	4812	7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe
Token: SeDebugPrivilege	2536	steamwebhelper.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe

description	pid	process	target process
PID 4812 wrote to memory of 2536	4812	7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe	steamwebhelper.exe
PID 4812 wrote to memory of 2536	4812	7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe
"C:\Users\Admin\AppData\Local\Temp\7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4812

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:2536

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
492KB

MD5
b6086a21814f1626c574a729736ee182

SHA1
40168f043446673232927d25c012b3357497c454

SHA256
7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99

SHA512
0f2e24e1c1c72b03a51e833f99ebf3632d3caf38e21d5af67c07dc9007813632ddaeca2892cb1d6c37f26692437d0801d6b83e5578dc4370ece28ef7f8beaca5

Download Submit
C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe
Filesize
492KB

MD5
b6086a21814f1626c574a729736ee182

SHA1
40168f043446673232927d25c012b3357497c454

SHA256
7c78a8e4972f6b93fc36408ec36787575d4c3e4db423ca3a275a1669dcdacc99

SHA512
0f2e24e1c1c72b03a51e833f99ebf3632d3caf38e21d5af67c07dc9007813632ddaeca2892cb1d6c37f26692437d0801d6b83e5578dc4370ece28ef7f8beaca5

Download Submit
memory/2536-134-0x0000000000000000-mapping.dmp

Download
memory/2536-138-0x00007FFE810B0000-0x00007FFE81B71000-memory.dmp

Filesize
10.8MB

Download
memory/2536-139-0x00007FFE810B0000-0x00007FFE81B71000-memory.dmp

Filesize
10.8MB

Download
memory/4812-132-0x0000000000250000-0x00000000002D0000-memory.dmp

Filesize
512KB

Download
memory/4812-133-0x00007FFE810B0000-0x00007FFE81B71000-memory.dmp

Filesize
10.8MB

Download
memory/4812-137-0x00007FFE810B0000-0x00007FFE81B71000-memory.dmp

Filesize
10.8MB

Download