297f90550fecab224d782ef73f1e2a777b70fcf2f90eb19460861a910e08b3b7

General

Target

Uninstalr_Portable.exe
Size

4.0MB
MD5

a35881a67ec38f9bb4e33a8dbe013061
SHA1

7e0c222a5429574b326e2fca275e9629f33e1801
SHA256

297f90550fecab224d782ef73f1e2a777b70fcf2f90eb19460861a910e08b3b7
SHA512

7f76e13addbcf381f32f634a61d560726812963aa374f2a5810d8f501168366f8c0d606e0200164654f821ca27bcc2ea80f3cc81393eb4c3868bfcd56fdb8133
SSDEEP

98304:cJFjFiafJBZhaWQDXiWGUiJBUOXRpg324zzU:UPxfJBZhaWqXHUDozo

Score

7^/10

discovery spyware stealer upx

Malware Config

Signatures

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2204-54-0x0000000000400000-0x00000000011C1000-memory.dmp	upx
behavioral1/memory/2204-65-0x0000000000400000-0x00000000011C1000-memory.dmp	upx
behavioral1/memory/2204-66-0x0000000000400000-0x00000000011C1000-memory.dmp	upx
behavioral1/memory/2204-69-0x0000000000400000-0x00000000011C1000-memory.dmp	upx
behavioral1/memory/2204-70-0x0000000000400000-0x00000000011C1000-memory.dmp	upx
behavioral1/memory/2204-71-0x0000000000400000-0x00000000011C1000-memory.dmp	upx

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	Uninstalr_Portable.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	Uninstalr_Portable.exe

Enumerates system info in registry 2 TTPs 4 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	Uninstalr_Portable.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	Uninstalr_Portable.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	Uninstalr_Portable.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion	Uninstalr_Portable.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2204	Uninstalr_Portable.exe
2204	Uninstalr_Portable.exe
2204	Uninstalr_Portable.exe
2204	Uninstalr_Portable.exe
2204	Uninstalr_Portable.exe
2004	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2004	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2204	Uninstalr_Portable.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2204	Uninstalr_Portable.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 1764	2204	Uninstalr_Portable.exe	28
PID 2204 wrote to memory of 1764	2204	Uninstalr_Portable.exe	28
PID 2204 wrote to memory of 1764	2204	Uninstalr_Portable.exe	28
PID 2204 wrote to memory of 1764	2204	Uninstalr_Portable.exe	28
PID 2204 wrote to memory of 2004	2204	Uninstalr_Portable.exe	30
PID 2204 wrote to memory of 2004	2204	Uninstalr_Portable.exe	30
PID 2204 wrote to memory of 2004	2204	Uninstalr_Portable.exe	30
PID 2204 wrote to memory of 2004	2204	Uninstalr_Portable.exe	30

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\Uninstalr_Portable.exe
"C:\Users\Admin\AppData\Local\Temp\Uninstalr_Portable.exe"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c winget list --accept-source-agreements > "C:\Users\Admin\AppData\Local\Temp\Uninstalr_can_delete_x2_259448804.tmp"
  2⤵
  PID:1764
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Get-AppxPackage -AllUsers | Out-File "C:\Users\Admin\AppData\Local\Temp\Uninstalr_can_delete_x1_259449069.tmp"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2004

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

3

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/2004-64-0x0000000074510000-0x0000000074ABB000-memory.dmp

Filesize
5.7MB

Download
memory/2004-62-0x0000000002740000-0x0000000002780000-memory.dmp

Filesize
256KB

Download
memory/2004-63-0x0000000002740000-0x0000000002780000-memory.dmp

Filesize
256KB

Download
memory/2004-59-0x0000000074510000-0x0000000074ABB000-memory.dmp

Filesize
5.7MB

Download
memory/2004-60-0x0000000074510000-0x0000000074ABB000-memory.dmp

Filesize
5.7MB

Download
memory/2004-61-0x0000000002740000-0x0000000002780000-memory.dmp

Filesize
256KB

Download
memory/2204-65-0x0000000000400000-0x00000000011C1000-memory.dmp

Filesize
13.8MB

Download
memory/2204-55-0x00000000003C0000-0x00000000003C1000-memory.dmp

Filesize
4KB

Download
memory/2204-54-0x0000000000400000-0x00000000011C1000-memory.dmp

Filesize
13.8MB

Download
memory/2204-56-0x0000000004F10000-0x0000000004F20000-memory.dmp

Filesize
64KB

Download
memory/2204-66-0x0000000000400000-0x00000000011C1000-memory.dmp

Filesize
13.8MB

Download
memory/2204-67-0x00000000003C0000-0x00000000003C1000-memory.dmp

Filesize
4KB

Download
memory/2204-68-0x0000000004F10000-0x0000000004F20000-memory.dmp

Filesize
64KB

Download
memory/2204-69-0x0000000000400000-0x00000000011C1000-memory.dmp

Filesize
13.8MB

Download
memory/2204-70-0x0000000000400000-0x00000000011C1000-memory.dmp

Filesize
13.8MB

Download
memory/2204-71-0x0000000000400000-0x00000000011C1000-memory.dmp

Filesize
13.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads