15f41151b5a4f29221663fbf264de3d7e2d894d4793ec7935f4123d11d596156

Analysis

max time kernel
133s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2024, 18:58

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General

Target

15f41151b5a4f29221663fbf264de3d7e2d894d4793ec7935f4123d11d596156.exe
Size

47KB
MD5

fe8c40e3ae404d1e63c27f375bfe72a3
SHA1

3d2719fcebece5f37cb3d03da37cfe3748cefbdc
SHA256

15f41151b5a4f29221663fbf264de3d7e2d894d4793ec7935f4123d11d596156
SHA512

4a8fbc47d513a3a85d57d3f24abc00cdab77dcb26ea50c3de8a712bcf5de80c6c5efa23d936434d3625e6a96cf544f7d4405c1ce720062bc65a27623d028f71b
SSDEEP

768:n8eRH+MlFh0pXrL4i6sh7iQroCHmmbk2NH5:n9l+Gi6sh7iQroCLr

Score

9^/10

upx

Malware Config

Signatures

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4888-0-0x0000000000400000-0x000000000040F000-memory.dmp	UPX
behavioral2/files/0x0008000000022f51-7.dat	UPX
behavioral2/memory/1248-11-0x0000000000400000-0x000000000040F000-memory.dmp	UPX
behavioral2/memory/1248-20-0x0000000000400000-0x000000000040F000-memory.dmp	UPX

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	15f41151b5a4f29221663fbf264de3d7e2d894d4793ec7935f4123d11d596156.exe

Executes dropped EXE 1 IoCs

pid	Process
1248	bkgrnd.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4888-0-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral2/files/0x0008000000022f51-7.dat	upx
behavioral2/memory/1248-11-0x0000000000400000-0x000000000040F000-memory.dmp	upx
behavioral2/memory/1248-20-0x0000000000400000-0x000000000040F000-memory.dmp	upx

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4888 wrote to memory of 1248	4888	15f41151b5a4f29221663fbf264de3d7e2d894d4793ec7935f4123d11d596156.exe	83
PID 4888 wrote to memory of 1248	4888	15f41151b5a4f29221663fbf264de3d7e2d894d4793ec7935f4123d11d596156.exe	83
PID 4888 wrote to memory of 1248	4888	15f41151b5a4f29221663fbf264de3d7e2d894d4793ec7935f4123d11d596156.exe	83

C:\Users\Admin\AppData\Local\Temp\15f41151b5a4f29221663fbf264de3d7e2d894d4793ec7935f4123d11d596156.exe
"C:\Users\Admin\AppData\Local\Temp\15f41151b5a4f29221663fbf264de3d7e2d894d4793ec7935f4123d11d596156.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4888
- C:\Users\Admin\AppData\Local\Temp\bkgrnd.exe
  "C:\Users\Admin\AppData\Local\Temp\bkgrnd.exe"
  2⤵
  - Executes dropped EXE
  PID:1248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\bkgrnd.exe

Filesize
47KB

MD5
2596003453b9437b9dc2d78fffed8303

SHA1
a8e6db6babf0f8fd5a393f97410cf737221c635d

SHA256
dc2350fbc2a577dcb59aa4fc33e7f87fd529585a82434cb7e2bde29d7a72a378

SHA512
550e48fbb4fe2143e4c32bed67f6d6abd15504ae27c68cad3d87518ed0fcc2e68f838b569343c3bc7ddcef14e79247aee002c5325ba258977491e8ed9486d424

Download Submit
memory/1248-11-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/1248-20-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/4888-0-0x0000000000400000-0x000000000040F000-memory.dmp

Filesize
60KB

Download
memory/4888-2-0x0000000004000000-0x0000000004006000-memory.dmp

Filesize
24KB

Download
memory/4888-1-0x0000000004000000-0x0000000004006000-memory.dmp

Filesize
24KB

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