88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c

Analysis

max time kernel
182s
max time network
197s
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 22:42

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General

Target

88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe
Size

492KB
MD5

29f0e092ac238e84c4ee793fabb3dd26
SHA1

93def642abf5a3626078cbe29ee4f7aec0de584c
SHA256

88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c
SHA512

46c439aa9536d2bc469317e4731d3bb88760cfa13f93684e6e963dfdab690fd7fdda4fb0d72d8faee911324b134852bdebe613f9ad335399f807c06c2c5f567c
SSDEEP

6144:Q0fjkYulXxWzHim5afHBKJnEyzkqVMhIIAkER0u+GIIIIIIIhIIIIIIIIIIIIIId:QSjkYIhCHiBKJnExqVM9gm5t

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

4392 steamwebhelper.exe

pid	process
4392	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:

88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4060001867-1434967833-2212371794-1000\Control Panel\International\Geo\Nation	88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.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:

88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exesteamwebhelper.exe

pid process

5024 88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe
4392 steamwebhelper.exe

pid	process
5024	88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe
4392	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	5024	88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe
Token: SeDebugPrivilege	4392	steamwebhelper.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe

description	pid	process	target process
PID 5024 wrote to memory of 4392	5024	88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe	steamwebhelper.exe
PID 5024 wrote to memory of 4392	5024	88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe
"C:\Users\Admin\AppData\Local\Temp\88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5024

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:4392

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
29f0e092ac238e84c4ee793fabb3dd26

SHA1
93def642abf5a3626078cbe29ee4f7aec0de584c

SHA256
88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c

SHA512
46c439aa9536d2bc469317e4731d3bb88760cfa13f93684e6e963dfdab690fd7fdda4fb0d72d8faee911324b134852bdebe613f9ad335399f807c06c2c5f567c

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

MD5
29f0e092ac238e84c4ee793fabb3dd26

SHA1
93def642abf5a3626078cbe29ee4f7aec0de584c

SHA256
88e38751dd7cb128b3eae4f55cc43c29cb2d0eafdb54b981831242114708cb2c

SHA512
46c439aa9536d2bc469317e4731d3bb88760cfa13f93684e6e963dfdab690fd7fdda4fb0d72d8faee911324b134852bdebe613f9ad335399f807c06c2c5f567c

Download Submit
memory/4392-135-0x0000000000000000-mapping.dmp

Download
memory/4392-139-0x00007FFEDA810000-0x00007FFEDB2D1000-memory.dmp

Filesize
10.8MB

Download
memory/4392-140-0x00007FFEDA810000-0x00007FFEDB2D1000-memory.dmp

Filesize
10.8MB

Download
memory/5024-132-0x0000000000380000-0x0000000000400000-memory.dmp

Filesize
512KB

Download
memory/5024-133-0x00007FFEDA810000-0x00007FFEDB2D1000-memory.dmp

Filesize
10.8MB

Download
memory/5024-134-0x00007FFEDA810000-0x00007FFEDB2D1000-memory.dmp

Filesize
10.8MB

Download
memory/5024-138-0x00007FFEDA810000-0x00007FFEDB2D1000-memory.dmp

Filesize
10.8MB

Download