d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0

Analysis

max time kernel
48s
max time network
202s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-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

580 steamwebhelper.exe

pid	process
580	steamwebhelper.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

2016 d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe
580 steamwebhelper.exe

pid	process
2016	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe
580	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	2016	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe
Token: SeDebugPrivilege	580	steamwebhelper.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe

description	pid	process	target process
PID 2016 wrote to memory of 580	2016	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe	steamwebhelper.exe
PID 2016 wrote to memory of 580	2016	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe	steamwebhelper.exe
PID 2016 wrote to memory of 580	2016	d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe
"C:\Users\Admin\AppData\Local\Temp\d646e3b682c21d47c02dd75d300368983fd6d12caae8c6282245f218f8e623d0.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2016

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:580

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
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/580-58-0x0000000000000000-mapping.dmp

Download
memory/580-62-0x00000000010C0000-0x0000000001108000-memory.dmp

Filesize
288KB

Download
memory/580-64-0x000000001B0A6000-0x000000001B0C5000-memory.dmp

Filesize
124KB

Download
memory/2016-54-0x00000000012A0000-0x00000000012E8000-memory.dmp

Filesize
288KB

Download
memory/2016-55-0x00000000003E0000-0x0000000000416000-memory.dmp

Filesize
216KB

Download
memory/2016-56-0x00000000003D0000-0x00000000003D6000-memory.dmp

Filesize
24KB

Download
memory/2016-57-0x000007FEFC211000-0x000007FEFC213000-memory.dmp

Filesize
8KB

Download
memory/2016-61-0x0000000000996000-0x00000000009B5000-memory.dmp

Filesize
124KB

Download