f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec

Analysis

max time kernel
36s
max time network
162s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-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

848 steamwebhelper.exe

pid	process
848	steamwebhelper.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

980 f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe
848 steamwebhelper.exe

pid	process
980	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe
848	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	980	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe
Token: SeDebugPrivilege	848	steamwebhelper.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe

description	pid	process	target process
PID 980 wrote to memory of 848	980	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe	steamwebhelper.exe
PID 980 wrote to memory of 848	980	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe	steamwebhelper.exe
PID 980 wrote to memory of 848	980	f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe
"C:\Users\Admin\AppData\Local\Temp\f15fb297fe10b72d5ffb922cdc6763294d159d4738b560a16412202637553dec.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:980

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:848

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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/848-58-0x0000000000000000-mapping.dmp

Download
memory/848-61-0x00000000010B0000-0x0000000001130000-memory.dmp

Filesize
512KB

Download
memory/980-54-0x0000000000080000-0x0000000000100000-memory.dmp

Filesize
512KB

Download
memory/980-55-0x00000000002C0000-0x00000000002F6000-memory.dmp

Filesize
216KB

Download
memory/980-56-0x0000000000300000-0x0000000000306000-memory.dmp

Filesize
24KB

Download
memory/980-57-0x000007FEFB931000-0x000007FEFB933000-memory.dmp

Filesize
8KB

Download