c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583

Analysis

max time kernel
144s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
13-02-2024 05:10

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General

Target

c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe
Size

4.4MB
MD5

9631809ff9e66cc5809e51e2929dfbe8
SHA1

4ee1085393d94978fc17b1453517f0aa7f40b8a3
SHA256

c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583
SHA512

3e350e41e7a86756438762c0a6772e5781757bb941e8c88c58238e1f19e15a3eb743301119050b30476d69bc68568a0bad1cdd4560f1ecac2cf4c0c72c9d77d1
SSDEEP

98304:k8sjkFhRWieWT0ywsagZ9VeXD3qJJXg2cMUGZWh:2jyhRPeWvnzwrivWh

Score

9^/10

upx

Malware Config

Signatures

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/files/0x00060000000231fc-6.dat	UPX
behavioral2/files/0x00060000000231fc-7.dat	UPX
behavioral2/memory/3116-8-0x0000000000400000-0x0000000000623000-memory.dmp	UPX
behavioral2/memory/3116-71-0x0000000000400000-0x0000000000623000-memory.dmp	UPX

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	WindowsLoader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	WindowsLoader.exe

Executes dropped EXE 1 IoCs

pid	Process
3116	WindowsLoader.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/files/0x00060000000231fc-6.dat	upx
behavioral2/files/0x00060000000231fc-7.dat	upx
behavioral2/memory/3116-8-0x0000000000400000-0x0000000000623000-memory.dmp	upx
behavioral2/memory/3116-71-0x0000000000400000-0x0000000000623000-memory.dmp	upx

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

System Information Discovery
T1082

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key created	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	WindowsLoader.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BaseBoardProduct	WindowsLoader.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3116	WindowsLoader.exe
3116	WindowsLoader.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: 33	3116	WindowsLoader.exe
Token: SeIncBasePriorityPrivilege	3116	WindowsLoader.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3116	WindowsLoader.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4860 wrote to memory of 3116	4860	c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe	84
PID 4860 wrote to memory of 3116	4860	c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe	84
PID 4860 wrote to memory of 3116	4860	c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe	84

C:\Users\Admin\AppData\Local\Temp\c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe
"C:\Users\Admin\AppData\Local\Temp\c88140bcf066a56fb1d067ab538f7f7a9b39190b955ba370ffdf91cbcbf02583.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4860
- C:\Users\Admin\AppData\Local\Temp\WindowsLoader.exe
  C:\Users\Admin\AppData\Local\Temp\WindowsLoader.exe
  2⤵
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Enumerates system info in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  PID:3116

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\WindowsLoader.exe

Filesize
2.0MB

MD5
8db3c73026eb0586a0c8ee56992a869f

SHA1
1f834087d0fecd20308c0af4552dd54c5751b885

SHA256
8fbd09b2ad9778b2e01c6db6e10451f1168649eba9f97c23d53006be6c6989ea

SHA512
229981071be4168c8e9e29acefffc0381dc1ccb6e961a0be64502ac52f2e337b1f83ee43c4c4f88ef18a6c0e50a91b06220885b0f0829dfce5846980d9cdfba6

Download Submit
C:\Users\Admin\AppData\Local\Temp\WindowsLoader.exe

Filesize
2.4MB

MD5
2edc5a0964c8422b094d0ef699327bd6

SHA1
6c1d1156939b21159bc5ad8cd4f7842d17c94ef9

SHA256
8ec0696b9ebb919373b010fa84183359b54e13ebbc33589ccf2577da99896e46

SHA512
e81884e6dd744986a62293e5f193ea81b375c7faa71b3399be99d83d2c2a5e27a12bc17ac021c3eebf1fbaf51325d413747e0997fc7c46204fce0f7958313aa3

Download Submit
memory/3116-8-0x0000000000400000-0x0000000000623000-memory.dmp

Filesize
2.1MB

Download
memory/3116-9-0x00000000025C0000-0x0000000002763000-memory.dmp

Filesize
1.6MB

Download
memory/3116-10-0x0000000002370000-0x0000000002383000-memory.dmp

Filesize
76KB

Download
memory/3116-23-0x0000000002390000-0x00000000023A2000-memory.dmp

Filesize
72KB

Download
memory/3116-18-0x0000000000760000-0x0000000000770000-memory.dmp

Filesize
64KB

Download
memory/3116-31-0x0000000010000000-0x0000000010021000-memory.dmp

Filesize
132KB

Download
memory/3116-39-0x0000000002E10000-0x0000000002E21000-memory.dmp

Filesize
68KB

Download
memory/3116-55-0x0000000002E30000-0x0000000002E40000-memory.dmp

Filesize
64KB

Download
memory/3116-47-0x00000000023B0000-0x00000000023C0000-memory.dmp

Filesize
64KB

Download
memory/3116-63-0x0000000002E40000-0x0000000002E60000-memory.dmp

Filesize
128KB

Download
memory/3116-71-0x0000000000400000-0x0000000000623000-memory.dmp

Filesize
2.1MB

Download