d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0

Analysis

max time kernel
147s
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
23-11-2022 15:48

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General

Target

d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe
Size

266KB
MD5

1c6165c4a1cfaf07843012625da9a115
SHA1

9214b7ac738d6912ab93594e86148b0a1e709ef3
SHA256

d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0
SHA512

70f9fd6c5af679a3c45c3162228ee1d5a8fe0f304948ed5ea03a2dcd30c44ea7b6776d0a186f7fa1e6273c0d6573fc390f543f249c9ccde1fb0c73518791e0d3
SSDEEP

6144:3TrcQBtCsuVw9rfzajo83zUgPDebJrTEqmyNrODp3kwj11TFFFFFFTFAFFFFTrZL:Drz2aGlIrTEsiGf

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

616 steamwebhelper.exe

pid	process
616	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:

d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.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:

d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exesteamwebhelper.exe

pid process

4004 d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe
616 steamwebhelper.exe

pid	process
4004	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe
616	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	4004	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe
Token: SeDebugPrivilege	616	steamwebhelper.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe

description	pid	process	target process
PID 4004 wrote to memory of 616	4004	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe	steamwebhelper.exe
PID 4004 wrote to memory of 616	4004	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe
"C:\Users\Admin\AppData\Local\Temp\d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4004

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:616

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
266KB

MD5
1c6165c4a1cfaf07843012625da9a115

SHA1
9214b7ac738d6912ab93594e86148b0a1e709ef3

SHA256
d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0

SHA512
70f9fd6c5af679a3c45c3162228ee1d5a8fe0f304948ed5ea03a2dcd30c44ea7b6776d0a186f7fa1e6273c0d6573fc390f543f249c9ccde1fb0c73518791e0d3

Download Submit
C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe
Filesize
266KB

MD5
1c6165c4a1cfaf07843012625da9a115

SHA1
9214b7ac738d6912ab93594e86148b0a1e709ef3

SHA256
d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0

SHA512
70f9fd6c5af679a3c45c3162228ee1d5a8fe0f304948ed5ea03a2dcd30c44ea7b6776d0a186f7fa1e6273c0d6573fc390f543f249c9ccde1fb0c73518791e0d3

Download Submit
memory/616-134-0x0000000000000000-mapping.dmp

Download
memory/616-138-0x00007FF857620000-0x00007FF8580E1000-memory.dmp

Filesize
10.8MB

Download
memory/616-139-0x00007FF857620000-0x00007FF8580E1000-memory.dmp

Filesize
10.8MB

Download
memory/4004-132-0x0000000000FB0000-0x0000000000FF8000-memory.dmp

Filesize
288KB

Download
memory/4004-133-0x00007FF857620000-0x00007FF8580E1000-memory.dmp

Filesize
10.8MB

Download
memory/4004-137-0x00007FF857620000-0x00007FF8580E1000-memory.dmp

Filesize
10.8MB

Download