ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af

Analysis

max time kernel
50s
max time network
200s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
23-11-2022 13:23

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General

Target

ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe
Size

195KB
MD5

7bbec57cf98fcb917ffe80d2de6c1c19
SHA1

901c9e69a6da069a32a1f2f467d9cd5610ac7142
SHA256

ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af
SHA512

ed5d65e5279565c177f3f49327916482d00f55c6ea0fe4d589cfc1ec31eddb2c673dc976c38e0520f991d79f25f167bc7a18d435c8c874d537ab6a780ec4d2eb
SSDEEP

6144:HDHyVG/j8MmXN6DV5sPYOI+oZCSaRpJ/miF:jSs/AMmXoD3uYOImSaRHuiF

Score

8^/10

persistence

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

steamwebhelper.exe

pid process

572 steamwebhelper.exe

pid	process
572	steamwebhelper.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exesteamwebhelper.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\steamwebhelper = "C:\\Users\\Admin\\AppData\\Roaming\\steamwebhelper2\\steamwebhelper.exe"	ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.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:

ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exesteamwebhelper.exe

pid process

1252 ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe
572 steamwebhelper.exe

pid	process
1252	ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe
572	steamwebhelper.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exesteamwebhelper.exe

description	pid	process
Token: SeDebugPrivilege	1252	ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe
Token: SeDebugPrivilege	572	steamwebhelper.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe

description	pid	process	target process
PID 1252 wrote to memory of 572	1252	ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe	steamwebhelper.exe
PID 1252 wrote to memory of 572	1252	ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe	steamwebhelper.exe
PID 1252 wrote to memory of 572	1252	ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe	steamwebhelper.exe

C:\Users\Admin\AppData\Local\Temp\ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe
"C:\Users\Admin\AppData\Local\Temp\ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af.exe"
1⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1252

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:572

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
195KB

MD5
7bbec57cf98fcb917ffe80d2de6c1c19

SHA1
901c9e69a6da069a32a1f2f467d9cd5610ac7142

SHA256
ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af

SHA512
ed5d65e5279565c177f3f49327916482d00f55c6ea0fe4d589cfc1ec31eddb2c673dc976c38e0520f991d79f25f167bc7a18d435c8c874d537ab6a780ec4d2eb

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

Filesize
195KB

MD5
7bbec57cf98fcb917ffe80d2de6c1c19

SHA1
901c9e69a6da069a32a1f2f467d9cd5610ac7142

SHA256
ad9a87e05f2af8be3be9f3922ec82714cc5fab527b4c8fde1a1d4cd628c9b2af

SHA512
ed5d65e5279565c177f3f49327916482d00f55c6ea0fe4d589cfc1ec31eddb2c673dc976c38e0520f991d79f25f167bc7a18d435c8c874d537ab6a780ec4d2eb

Download Submit
memory/572-58-0x0000000000000000-mapping.dmp

Download
memory/572-61-0x0000000000F60000-0x0000000000F96000-memory.dmp

Filesize
216KB

Download
memory/1252-54-0x0000000001390000-0x00000000013C6000-memory.dmp

Filesize
216KB

Download
memory/1252-55-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/1252-56-0x000007FEFBCC1000-0x000007FEFBCC3000-memory.dmp

Filesize
8KB

Download
memory/1252-57-0x000000001AEC6000-0x000000001AEE5000-memory.dmp

Filesize
124KB

Download