52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50

Analysis

max time kernel
141s
max time network
127s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
13-03-2024 01:57

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General

Target

52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe
Size

196KB
MD5

490c3a845ffaf7f3e9f2e16c8f5fd181
SHA1

a42c7294c5b56be51c38a1e393ec7daff0dbccf5
SHA256

52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50
SHA512

90f1042a6b68efd68b8102c0e0f2c4f19a4f2d4d218228897f7eb3870f7bdf847bb31b7b9af8a92251812b5e077c4a2d525e71682e0c8dd5ce6b3826e7c73d5e
SSDEEP

6144:rBs27MMLyX5HXXXDTXXXOGqIII+pXXX5AYjKXXXDoXXXG6XXXxXXXLIIIEAkOCOu:rK20HXXX/XXXFqIIIcXXX5j2XXXcXXXf

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
1796	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
1320	ayahost.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Debug\ayahost.exe	52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe
File opened for modification	C:\Windows\Debug\ayahost.exe	52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	ayahost.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ayahost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	1112	52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1112 wrote to memory of 1796	1112	52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe	29
PID 1112 wrote to memory of 1796	1112	52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe	29
PID 1112 wrote to memory of 1796	1112	52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe	29
PID 1112 wrote to memory of 1796	1112	52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe	29

C:\Users\Admin\AppData\Local\Temp\52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe
"C:\Users\Admin\AppData\Local\Temp\52efa59aa3e7d3a36f02caff4d88fdfe9da3739bf04e3a0771765931bc7d4c50.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1112
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\52EFA5~1.EXE > nul
  2⤵
  - Deletes itself
  PID:1796

C:\Windows\Debug\ayahost.exe
C:\Windows\Debug\ayahost.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:1320

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:\Windows\debug\ayahost.exe

Filesize
196KB

MD5
e75d5d600bbe44b6d8f028c54ba186da

SHA1
4ca0bf30fe552f82585433fae7ae16b488f04776

SHA256
8c83fcff1a58a9a5feafd8ae4bf1d564f3ac5b6b7b5db41dabdacff51e1970ea

SHA512
60524a8cd50f51dddf6248a4c28447cd80939da64975b5d38fb13b86949be4394a59b3de6522c47391fa195d1a83c00f64d07732e6330d90bca1e5ca3673223b

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