7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915

Analysis

max time kernel
167s
max time network
239s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
24-11-2022 23:13

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General

Target

7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe
Size

492KB
MD5

32273957edba2bee2df88f7c82f59f99
SHA1

105b5f37ea8d0a78b0e62700316bb5ff093ec2c5
SHA256

7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915
SHA512

0c74a6cd4d2395887571c016062f04943c59f63c70aa088c4a8beaff1b200ab5d3cedb7e5e8c9d8c262359269aeba5774d4f461100655cc97edff2b07572a83c
SSDEEP

6144:hATGEndMe79X6gQHsEqvBEddTzXQf44gaDINwmPER0u+GIIIIIIIhIIIIIIIIIIj:wGEndMQ6g0kKdTzXHnwmsm5T

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

3784 steamwebhelper.exe

pid	process
3784	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:

7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

steamwebhelper.exe7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.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"	7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.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:

7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exesteamwebhelper.exe

pid process

840 7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe
3784 steamwebhelper.exe

pid	process
840	7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe
3784	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	840	7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe
Token: SeDebugPrivilege	3784	steamwebhelper.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe

description	pid	process	target process
PID 840 wrote to memory of 3784	840	7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe	steamwebhelper.exe
PID 840 wrote to memory of 3784	840	7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe
"C:\Users\Admin\AppData\Local\Temp\7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:840

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:3784

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
32273957edba2bee2df88f7c82f59f99

SHA1
105b5f37ea8d0a78b0e62700316bb5ff093ec2c5

SHA256
7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915

SHA512
0c74a6cd4d2395887571c016062f04943c59f63c70aa088c4a8beaff1b200ab5d3cedb7e5e8c9d8c262359269aeba5774d4f461100655cc97edff2b07572a83c

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

MD5
32273957edba2bee2df88f7c82f59f99

SHA1
105b5f37ea8d0a78b0e62700316bb5ff093ec2c5

SHA256
7ec4019aea76b3486297c090a1e8dd83f96544f3ecb2ae32e152166817bc3915

SHA512
0c74a6cd4d2395887571c016062f04943c59f63c70aa088c4a8beaff1b200ab5d3cedb7e5e8c9d8c262359269aeba5774d4f461100655cc97edff2b07572a83c

Download Submit
memory/840-132-0x0000000000210000-0x0000000000290000-memory.dmp

Filesize
512KB

Download
memory/840-133-0x00007FFDF5150000-0x00007FFDF5C11000-memory.dmp

Filesize
10.8MB

Download
memory/840-137-0x00007FFDF5150000-0x00007FFDF5C11000-memory.dmp

Filesize
10.8MB

Download
memory/3784-134-0x0000000000000000-mapping.dmp

Download
memory/3784-138-0x00007FFDF5150000-0x00007FFDF5C11000-memory.dmp

Filesize
10.8MB

Download
memory/3784-139-0x00007FFDF5150000-0x00007FFDF5C11000-memory.dmp

Filesize
10.8MB

Download