a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731

Analysis

max time kernel
162s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2022 21:19

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General

Target

a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe
Size

492KB
MD5

eb6156427afa9287268637b8edb17fb8
SHA1

9ce951c3e6736ed1a631cf3f24b838c2976d7e93
SHA256

a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731
SHA512

2f4a9e4f48c2f31e8abc5041a7f7f79a1b7dfdcebcab09eb1ccabe8297390a7262e0bd48e5afb9f113ef0336c38fd890dab6e7da3aab0076a627fc1c3c7b0800
SSDEEP

6144:KX/b68WUSoB7e5Q+ZcGTo3vYZxDMWouc0WgyucpzUER0u+GIIIIIIIhIIIIIIIIV:4e8/B65ZbTgAjoWltynpjm5V

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

4196 steamwebhelper.exe

pid	process
4196	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:

a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.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:

a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exesteamwebhelper.exe

pid process

1500 a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe
4196 steamwebhelper.exe

pid	process
1500	a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe
4196	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	1500	a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe
Token: SeDebugPrivilege	4196	steamwebhelper.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe

description	pid	process	target process
PID 1500 wrote to memory of 4196	1500	a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe	steamwebhelper.exe
PID 1500 wrote to memory of 4196	1500	a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe
"C:\Users\Admin\AppData\Local\Temp\a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1500

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:4196

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

Replay Monitor

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Downloads

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

MD5
eb6156427afa9287268637b8edb17fb8

SHA1
9ce951c3e6736ed1a631cf3f24b838c2976d7e93

SHA256
a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731

SHA512
2f4a9e4f48c2f31e8abc5041a7f7f79a1b7dfdcebcab09eb1ccabe8297390a7262e0bd48e5afb9f113ef0336c38fd890dab6e7da3aab0076a627fc1c3c7b0800

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

MD5
eb6156427afa9287268637b8edb17fb8

SHA1
9ce951c3e6736ed1a631cf3f24b838c2976d7e93

SHA256
a3e7ae1dd7f07ce18b36a974f9f54d19467da29423bcb2741d8b18006437d731

SHA512
2f4a9e4f48c2f31e8abc5041a7f7f79a1b7dfdcebcab09eb1ccabe8297390a7262e0bd48e5afb9f113ef0336c38fd890dab6e7da3aab0076a627fc1c3c7b0800

Download Submit
memory/1500-132-0x0000000000200000-0x0000000000280000-memory.dmp

Filesize
512KB

Download
memory/1500-133-0x00007FFB80240000-0x00007FFB80D01000-memory.dmp

Filesize
10.8MB

Download
memory/1500-138-0x00007FFB80240000-0x00007FFB80D01000-memory.dmp

Filesize
10.8MB

Download
memory/1500-139-0x00007FFB80240000-0x00007FFB80D01000-memory.dmp

Filesize
10.8MB

Download
memory/4196-134-0x0000000000000000-mapping.dmp

Download
memory/4196-137-0x00007FFB80240000-0x00007FFB80D01000-memory.dmp

Filesize
10.8MB

Download
memory/4196-140-0x00007FFB80240000-0x00007FFB80D01000-memory.dmp

Filesize
10.8MB

Download