7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399

Analysis

max time kernel
96s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27/09/2024, 22:04

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General

Target

7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe
Size

155KB
MD5

49b4df23ce8749679e5230568a2228ed
SHA1

cf86b8d0b086977844e778cbc3f6a346b7277242
SHA256

7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399
SHA512

15ea2aa410a011dc19fa36d854b93de9116f63874513f9990fd67512295c97b9c12a581107821ebd71ec863d38a8dfa018981c36c829404e51d46c2186933ca7
SSDEEP

3072:NCEHxQlNClEMCnIx1rMrFS+KX6lKhGPL6bcxgqW9yloQF4mjtdtM:NCEHx5Qn+14rF/KXGVPLZxgF9jQF1jtY

Score

8^/10

bootkit discovery persistence upx

Malware Config

Signatures

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
2892	upsupx3.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	werfault.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	\??\c:\windows\system32\Mylog.log	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4380-0-0x00007FF772FE0000-0x00007FF773041000-memory.dmp	upx
behavioral2/memory/2892-19-0x0000000000CD0000-0x0000000000D5A000-memory.dmp	upx
behavioral2/memory/4380-20-0x00007FF772FE0000-0x00007FF773041000-memory.dmp	upx
behavioral2/files/0x000700000002347e-17.dat	upx
behavioral2/memory/2892-22-0x0000000000CD0000-0x0000000000D5A000-memory.dmp	upx

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\windows\inf\ups.ini	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	upsupx3.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4380	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe
4380	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4380 wrote to memory of 3192	4380	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe	82
PID 4380 wrote to memory of 3192	4380	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe	82
PID 4380 wrote to memory of 3192	4380	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe	82
PID 4380 wrote to memory of 2892	4380	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe	83
PID 4380 wrote to memory of 2892	4380	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe	83
PID 4380 wrote to memory of 2892	4380	7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe	83

C:\Users\Admin\AppData\Local\Temp\7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe
"C:\Users\Admin\AppData\Local\Temp\7fc7b92b79ffb753ee1057e950e295852ebfebced20b06475151763a902b2399.exe"
1⤵
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4380
- C:\Windows\System32\werfault.exe
  "C:\Windows\System32\werfault.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  PID:3192
- C:\windows\temp\upsupx3.exe
  C:\windows\temp\upsupx3.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Temp\upsupx3.exe

Filesize
238KB

MD5
219ad549c4d74baaf85871c1eb484b2f

SHA1
37bc156ef7c53e371314d020a551fd4ae1edc041

SHA256
6c33432c658be9c33e8475cdf8c771ad96def493d7f8efcb69ba8d251ccd4332

SHA512
a3df8aeb2778a16b50fde313c040f6cb1919ac4c4461f1cd892f15e6a27984ff6b970e8228f04581453dabf053f6d1372542a291cd0f980d966b9bcd87b3ea70

Download Submit
memory/2892-19-0x0000000000CD0000-0x0000000000D5A000-memory.dmp

Filesize
552KB

Download
memory/2892-22-0x0000000000CD0000-0x0000000000D5A000-memory.dmp

Filesize
552KB

Download
memory/3192-4-0x00000254E05C0000-0x00000254E05C1000-memory.dmp

Filesize
4KB

Download
memory/3192-11-0x00000254E3830000-0x00000254E3861000-memory.dmp

Filesize
196KB

Download
memory/3192-12-0x00000254E3830000-0x00000254E3861000-memory.dmp

Filesize
196KB

Download
memory/4380-0-0x00007FF772FE0000-0x00007FF773041000-memory.dmp

Filesize
388KB

Download
memory/4380-20-0x00007FF772FE0000-0x00007FF773041000-memory.dmp

Filesize
388KB

Download