4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d

Analysis

max time kernel
122s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
25-11-2022 01:42

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General

Target

4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe
Size

492KB
MD5

d4996ead0844d2d4cd214d32518bbb97
SHA1

892132e499f0b8c06a4bc7db6beb00e7e0bf5c50
SHA256

4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d
SHA512

72b457ed4b5e3d12d0aa54b9864a630b338f1b154e23a9559c1731ac0ea195ff5802de693742731bb5dc1df12aaa761bb3320531af033549d61f449e048a2e7d
SSDEEP

6144:QcABECAClP2k2BkehhmsVyh/bTzng0m8rPK8jER0u+GIIIIIIIhIIIIIIIIIIIIM:QyCA+P2ktaNVQ/bTrgaNAm5s

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

3508 steamwebhelper.exe

pid	process
3508	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:

4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.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:

4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exesteamwebhelper.exe

pid process

3068 4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe
3508 steamwebhelper.exe

pid	process
3068	4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe
3508	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	3068	4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe
Token: SeDebugPrivilege	3508	steamwebhelper.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe

description	pid	process	target process
PID 3068 wrote to memory of 3508	3068	4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe	steamwebhelper.exe
PID 3068 wrote to memory of 3508	3068	4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe
"C:\Users\Admin\AppData\Local\Temp\4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3068

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:3508

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
d4996ead0844d2d4cd214d32518bbb97

SHA1
892132e499f0b8c06a4bc7db6beb00e7e0bf5c50

SHA256
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d

SHA512
72b457ed4b5e3d12d0aa54b9864a630b338f1b154e23a9559c1731ac0ea195ff5802de693742731bb5dc1df12aaa761bb3320531af033549d61f449e048a2e7d

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

MD5
d4996ead0844d2d4cd214d32518bbb97

SHA1
892132e499f0b8c06a4bc7db6beb00e7e0bf5c50

SHA256
4ef9006d67d7cb1e61bc7e09d0c9d52ef1442ac10a5a5c3c1d70a4d9ecbfac7d

SHA512
72b457ed4b5e3d12d0aa54b9864a630b338f1b154e23a9559c1731ac0ea195ff5802de693742731bb5dc1df12aaa761bb3320531af033549d61f449e048a2e7d

Download Submit
memory/3068-132-0x0000000000D40000-0x0000000000DC0000-memory.dmp

Filesize
512KB

Download
memory/3068-133-0x00007FF9C7460000-0x00007FF9C7F21000-memory.dmp

Filesize
10.8MB

Download
memory/3068-138-0x00007FF9C7460000-0x00007FF9C7F21000-memory.dmp

Filesize
10.8MB

Download
memory/3508-134-0x0000000000000000-mapping.dmp

Download
memory/3508-137-0x00007FF9C7460000-0x00007FF9C7F21000-memory.dmp

Filesize
10.8MB

Download
memory/3508-139-0x00007FF9C7460000-0x00007FF9C7F21000-memory.dmp

Filesize
10.8MB

Download