Malware Analysis Report

2024-09-09 19:13

Sample ID 240613-xd8zcasaqn
Target 052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e
SHA256 052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e
Tags
upx evasion
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e

Threat Level: Known bad

The file 052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e was found to be: Known bad.

Malicious Activity Summary

upx evasion

Detects Windows executables referencing non-Windows User-Agents

UPX dump on OEP (original entry point)

UPX dump on OEP (original entry point)

Detects Windows executables referencing non-Windows User-Agents

Sets file to hidden

Executes dropped EXE

Checks computer location settings

UPX packed file

Deletes itself

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Views/modifies file attributes

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-13 18:45

Signatures

Detects Windows executables referencing non-Windows User-Agents

Description Indicator Process Target
N/A N/A N/A N/A

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-13 18:45

Reported

2024-06-13 18:47

Platform

win7-20240508-en

Max time kernel

143s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe"

Signatures

Detects Windows executables referencing non-Windows User-Agents

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Sets file to hidden

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\ayahost.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Debug\ayahost.exe C:\Windows\SysWOW64\attrib.exe N/A
File created C:\Windows\Debug\ayahost.exe C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe N/A
File opened for modification C:\Windows\Debug\ayahost.exe C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe

"C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\ayahost.exe

C:\Windows\Debug\ayahost.exe

C:\Windows\Debug\ayahost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\052CDF~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.baidu.com udp
US 8.8.8.8:53 iwPV5m9Y4.nnnn.eu.org udp
US 8.8.8.8:53 vtrs6X9ETN.nnnn.eu.org udp
US 8.8.8.8:53 8qWpg0Wmug.nnnn.eu.org udp
US 8.8.8.8:53 LJmkTtqKz.nnnn.eu.org udp

Files

memory/2932-0-0x0000000000400000-0x0000000000417000-memory.dmp

C:\Windows\Debug\ayahost.exe

MD5 3ad5d86e45a45b881531d586fa14893b
SHA1 cedbf3c1cbff795d0c1c9b51662626e68199c4c8
SHA256 95589526408887c58c2c3149ff9555ba0db87de02916a749a8cd78585fa556f7
SHA512 094127cbaef89f7eb0b31821d750edbb39ce9534743c19b520e6e606dee3f025b73efbd92d1383df60a3d630c6f8abd802651ecffd3c597d10696b70c128fd5e

memory/2072-5-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2932-7-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2072-8-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2072-9-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2072-13-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2072-18-0x0000000000400000-0x0000000000417000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-13 18:45

Reported

2024-06-13 18:47

Platform

win10v2004-20240508-en

Max time kernel

143s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe"

Signatures

Detects Windows executables referencing non-Windows User-Agents

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

UPX dump on OEP (original entry point)

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Sets file to hidden

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\uauhost.exe N/A

UPX packed file

upx
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\uauhost.exe C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe N/A
File opened for modification C:\Windows\Debug\uauhost.exe C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe N/A
File opened for modification C:\Windows\Debug\uauhost.exe C:\Windows\SysWOW64\attrib.exe N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe

"C:\Users\Admin\AppData\Local\Temp\052cdfd178c797de657b148d8573510ccff06607c4d87d7efa0a903f8406930e.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\uauhost.exe

C:\Windows\Debug\uauhost.exe

C:\Windows\Debug\uauhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\052CDF~1.EXE > nul

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4316,i,4686244434963378549,11462511444150484980,262144 --variations-seed-version --mojo-platform-channel-handle=3656 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.baidu.com udp
US 8.8.8.8:53 bjRCIvNaRs.nnnn.eu.org udp
NL 52.142.223.178:80 tcp
US 8.8.8.8:53 og69sOk8M.nnnn.eu.org udp
US 8.8.8.8:53 SjQw0gQ3PF.nnnn.eu.org udp
US 8.8.8.8:53 fg5ta9n7qY.nnnn.eu.org udp

Files

memory/1060-0-0x0000000000400000-0x0000000000417000-memory.dmp

C:\Windows\debug\uauhost.exe

MD5 f637baaa5e0c674e777f130e6e9cc7fd
SHA1 8bc11c143146cb7b8091d2be7017df0df7bca7a0
SHA256 e153c529175a6eec386327900f95aa677e1c06c7f5345f779170b9f859964853
SHA512 d591c8f5b971934da395f38b2090decc8bc7998b9179d12ed786cba6db218deaa72adc04601b1d88c2bbd3b39948c5e8e89aa29610749da8b14c3ef9a3b33199

memory/2668-5-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2668-7-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2668-8-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2668-12-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2668-15-0x0000000000400000-0x0000000000417000-memory.dmp

memory/2668-19-0x0000000000400000-0x0000000000417000-memory.dmp