1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef

Analysis

max time kernel
143s
max time network
151s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
25-11-2022 04:25

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General

Target

1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe
Size

194KB
MD5

c4e9f3a491245e724403df57c11aad84
SHA1

b8dd9be808b8381949f2bc70f9f03342445b981e
SHA256

1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef
SHA512

e269af0eb2113c0b3858227f1923176d808f6698b77d6d7c5eec89deb070f4e441fbc26740671602d45566b9418cc7420a785e7c2f041f52d9a05fa3f6db485e
SSDEEP

6144:HDHyVG/j8MmXN6DV5sPYOI+oZCSaRpJ/mig:jSs/AMmXoD3uYOImSaRHuig

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

480 steamwebhelper.exe

pid	process
480	steamwebhelper.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.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:

1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exesteamwebhelper.exe

pid process

1356 1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe
480 steamwebhelper.exe

pid	process
1356	1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe
480	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	1356	1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe
Token: SeDebugPrivilege	480	steamwebhelper.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe

description	pid	process	target process
PID 1356 wrote to memory of 480	1356	1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe	steamwebhelper.exe
PID 1356 wrote to memory of 480	1356	1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe	steamwebhelper.exe
PID 1356 wrote to memory of 480	1356	1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe
"C:\Users\Admin\AppData\Local\Temp\1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1356

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:480

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
194KB

MD5
c4e9f3a491245e724403df57c11aad84

SHA1
b8dd9be808b8381949f2bc70f9f03342445b981e

SHA256
1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef

SHA512
e269af0eb2113c0b3858227f1923176d808f6698b77d6d7c5eec89deb070f4e441fbc26740671602d45566b9418cc7420a785e7c2f041f52d9a05fa3f6db485e

Download Submit
C:\Users\Admin\AppData\Roaming\steamwebhelper2\steamwebhelper.exe
Filesize
194KB

MD5
c4e9f3a491245e724403df57c11aad84

SHA1
b8dd9be808b8381949f2bc70f9f03342445b981e

SHA256
1996f3a3651f87fa34498cfae77b89da8ce9e584b6bfd6abbdc95e5e54a59eef

SHA512
e269af0eb2113c0b3858227f1923176d808f6698b77d6d7c5eec89deb070f4e441fbc26740671602d45566b9418cc7420a785e7c2f041f52d9a05fa3f6db485e

Download Submit
memory/480-57-0x0000000000000000-mapping.dmp

Download
memory/480-60-0x00000000002D0000-0x0000000000306000-memory.dmp

Filesize
216KB

Download
memory/1356-54-0x00000000010E0000-0x0000000001116000-memory.dmp

Filesize
216KB

Download
memory/1356-55-0x0000000000460000-0x0000000000466000-memory.dmp

Filesize
24KB

Download
memory/1356-56-0x000007FEFBF21000-0x000007FEFBF23000-memory.dmp

Filesize
8KB

Download
memory/1356-61-0x000000001AD66000-0x000000001AD85000-memory.dmp

Filesize
124KB

Download