deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641

Analysis

max time kernel
189s
max time network
193s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2022 22:53

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General

Target

deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe
Size

492KB
MD5

9d64619e820a50bf9d5306f23c9917fd
SHA1

ce3c3114b40664ce37e9c49954f35881e4cde3de
SHA256

deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641
SHA512

d282a3a7174c52284c2ffb6110e861221ba1b5cf612f25c8b8b3dcf543581c7d3d62de3ce77d33157dc2c8fe6ca60c7891453fa03e4f295a0735eee48dce7188
SSDEEP

6144:gyy/a3nmKmvI7HNaLYtOuRIdjWRvlntOT6fLL339xanER0u+GIIIIIIIhIIIIIIZ:gyy/aXm9AHGIIEltA6fLj3aEm5J

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

1924 steamwebhelper.exe

pid	process
1924	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:

deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.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:

deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exesteamwebhelper.exe

pid process

488 deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe
1924 steamwebhelper.exe

pid	process
488	deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe
1924	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	488	deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe
Token: SeDebugPrivilege	1924	steamwebhelper.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe

description	pid	process	target process
PID 488 wrote to memory of 1924	488	deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe	steamwebhelper.exe
PID 488 wrote to memory of 1924	488	deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe
"C:\Users\Admin\AppData\Local\Temp\deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:488

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:1924

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

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Downloads

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

MD5
9d64619e820a50bf9d5306f23c9917fd

SHA1
ce3c3114b40664ce37e9c49954f35881e4cde3de

SHA256
deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641

SHA512
d282a3a7174c52284c2ffb6110e861221ba1b5cf612f25c8b8b3dcf543581c7d3d62de3ce77d33157dc2c8fe6ca60c7891453fa03e4f295a0735eee48dce7188

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

MD5
9d64619e820a50bf9d5306f23c9917fd

SHA1
ce3c3114b40664ce37e9c49954f35881e4cde3de

SHA256
deae7d5278b00d654178242eb36e1453353458e12951015f8a39a9a16cfde641

SHA512
d282a3a7174c52284c2ffb6110e861221ba1b5cf612f25c8b8b3dcf543581c7d3d62de3ce77d33157dc2c8fe6ca60c7891453fa03e4f295a0735eee48dce7188

Download Submit
memory/488-132-0x0000000000CD0000-0x0000000000D50000-memory.dmp

Filesize
512KB

Download
memory/488-133-0x00007FF91EC30000-0x00007FF91F6F1000-memory.dmp

Filesize
10.8MB

Download
memory/488-137-0x00007FF91EC30000-0x00007FF91F6F1000-memory.dmp

Filesize
10.8MB

Download
memory/1924-134-0x0000000000000000-mapping.dmp

Download
memory/1924-138-0x00007FF91EC30000-0x00007FF91F6F1000-memory.dmp

Filesize
10.8MB

Download
memory/1924-139-0x00007FF91EC30000-0x00007FF91F6F1000-memory.dmp

Filesize
10.8MB

Download