f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec

Analysis

max time kernel
149s
max time network
159s
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 17:08

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General

Target

f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe
Size

492KB
MD5

87684be9142decfc12aa4d596a930d04
SHA1

f55050ac6bbee10762fe3a9895da6424ea52b0a5
SHA256

f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec
SHA512

2fd74f2e0ec9b7eccace85f35736b9359aec2607e7fd100a488b83fac5c4516dbf91de98fefbc5b9150ffdb876540e0e2bcb22c7ebbd91b31cd1dd794903e931
SSDEEP

6144:3O1cMQw34hlljnJawGWtVaoi42UkBSSDER0u+GIIIIIIIhIIIIIIIIIIIIIIIU8:e2mTIt642d9gm58

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

880 steamwebhelper.exe

pid	process
880	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:

f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.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:

f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exesteamwebhelper.exe

pid process

2620 f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe
880 steamwebhelper.exe

pid	process
2620	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe
880	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	2620	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe
Token: SeDebugPrivilege	880	steamwebhelper.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe

description	pid	process	target process
PID 2620 wrote to memory of 880	2620	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe	steamwebhelper.exe
PID 2620 wrote to memory of 880	2620	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe
"C:\Users\Admin\AppData\Local\Temp\f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2620

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:880

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe

Filesize
492KB

MD5
87684be9142decfc12aa4d596a930d04

SHA1
f55050ac6bbee10762fe3a9895da6424ea52b0a5

SHA256
f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec

SHA512
2fd74f2e0ec9b7eccace85f35736b9359aec2607e7fd100a488b83fac5c4516dbf91de98fefbc5b9150ffdb876540e0e2bcb22c7ebbd91b31cd1dd794903e931

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

Filesize
492KB

MD5
87684be9142decfc12aa4d596a930d04

SHA1
f55050ac6bbee10762fe3a9895da6424ea52b0a5

SHA256
f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec

SHA512
2fd74f2e0ec9b7eccace85f35736b9359aec2607e7fd100a488b83fac5c4516dbf91de98fefbc5b9150ffdb876540e0e2bcb22c7ebbd91b31cd1dd794903e931

Download Submit
memory/880-134-0x0000000000000000-mapping.dmp

Download
memory/880-138-0x00007FFE4F090000-0x00007FFE4FB51000-memory.dmp

Filesize
10.8MB

Download
memory/880-139-0x00007FFE4F090000-0x00007FFE4FB51000-memory.dmp

Filesize
10.8MB

Download
memory/2620-132-0x0000000000F90000-0x0000000001010000-memory.dmp

Filesize
512KB

Download
memory/2620-133-0x00007FFE4F090000-0x00007FFE4FB51000-memory.dmp

Filesize
10.8MB

Download
memory/2620-137-0x00007FFE4F090000-0x00007FFE4FB51000-memory.dmp

Filesize
10.8MB

Download