989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36

Analysis

max time kernel
93s
max time network
215s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
24-11-2022 21:52

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General

Target

989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe
Size

492KB
MD5

7b975db0eab44098894af51289d1de3e
SHA1

e50cb9e8158d0cfdb1e548408c2429b2bb58e441
SHA256

989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36
SHA512

996144a67a882505f96d64dec4690d074d420e9103f3a42eceb0bacdd96439254f9eaa38f6d9d3e54c2470ff33e26cb0274e419028c7d5dcb0ab0b204cf36caa
SSDEEP

6144:1xrODPXAkZEOp3iDvrpyd//9SAr5dbCRmywzc/wFnXKER0u+GIIIIIIIhIIIIIIA:1xrZ7pOTldbCRCikm5Q

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

1640 steamwebhelper.exe

pid	process
1640	steamwebhelper.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

steamwebhelper.exe989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	steamwebhelper.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.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:

989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exesteamwebhelper.exe

pid process

1248 989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe
1640 steamwebhelper.exe

pid	process
1248	989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe
1640	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	1248	989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe
Token: SeDebugPrivilege	1640	steamwebhelper.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe

description	pid	process	target process
PID 1248 wrote to memory of 1640	1248	989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe	steamwebhelper.exe
PID 1248 wrote to memory of 1640	1248	989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe	steamwebhelper.exe
PID 1248 wrote to memory of 1640	1248	989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe
"C:\Users\Admin\AppData\Local\Temp\989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1248

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:1640

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

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
7b975db0eab44098894af51289d1de3e

SHA1
e50cb9e8158d0cfdb1e548408c2429b2bb58e441

SHA256
989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36

SHA512
996144a67a882505f96d64dec4690d074d420e9103f3a42eceb0bacdd96439254f9eaa38f6d9d3e54c2470ff33e26cb0274e419028c7d5dcb0ab0b204cf36caa

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

MD5
7b975db0eab44098894af51289d1de3e

SHA1
e50cb9e8158d0cfdb1e548408c2429b2bb58e441

SHA256
989d185b44a90c517cb91880b18ececd8c9f4391245f5572d7cb32b95dd11d36

SHA512
996144a67a882505f96d64dec4690d074d420e9103f3a42eceb0bacdd96439254f9eaa38f6d9d3e54c2470ff33e26cb0274e419028c7d5dcb0ab0b204cf36caa

Download Submit
memory/1248-54-0x0000000000C50000-0x0000000000CD0000-memory.dmp

Filesize
512KB

Download
memory/1248-55-0x0000000000BC0000-0x0000000000BF6000-memory.dmp

Filesize
216KB

Download
memory/1248-56-0x00000000001E0000-0x00000000001E6000-memory.dmp

Filesize
24KB

Download
memory/1248-57-0x000007FEFC461000-0x000007FEFC463000-memory.dmp

Filesize
8KB

Download
memory/1640-58-0x0000000000000000-mapping.dmp

Download
memory/1640-61-0x0000000000CF0000-0x0000000000D70000-memory.dmp

Filesize
512KB

Download