71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9

Analysis

max time kernel
141s
max time network
122s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
24/04/2024, 17:22

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General

Target

71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe
Size

72KB
MD5

27bb69db8b617fbf8e73d1353997f70b
SHA1

f2ed36842c9018a9570be7a6d7328fa07007539c
SHA256

71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9
SHA512

f360d797cf93219a5c745d7e0ae420104d40f9effa110963ee427cd3589012fa16ff57a695a3ad231575c248e592199ae5c0107c07cb0c974aaa0d87e9242d24
SSDEEP

1536:Or3Z5IfQmv81abyyXcZibfffsffffClllm:SJOfQm010yyXcZ6lllm

Score

9^/10

evasion

Malware Config

Signatures

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
behavioral1/files/0x000b0000000126ab-2.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
2408	attrib.exe

Deletes itself 1 IoCs

pid	Process
2168	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2816	ayahost.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\ayahost.exe	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe
File opened for modification	C:\Windows\Debug\ayahost.exe	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe
File opened for modification	C:\Windows\Debug\ayahost.exe	attrib.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2240	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 2408	2240	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe	28
PID 2240 wrote to memory of 2408	2240	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe	28
PID 2240 wrote to memory of 2408	2240	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe	28
PID 2240 wrote to memory of 2408	2240	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe	28
PID 2240 wrote to memory of 2168	2240	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe	31
PID 2240 wrote to memory of 2168	2240	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe	31
PID 2240 wrote to memory of 2168	2240	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe	31
PID 2240 wrote to memory of 2168	2240	71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe	31

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2408	attrib.exe

C:\Users\Admin\AppData\Local\Temp\71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe
"C:\Users\Admin\AppData\Local\Temp\71235077e308d9a0f328b4dd801f53e1a5270ff38a19239db56439144f617ca9.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\ayahost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - Views/modifies file attributes
  PID:2408
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\712350~1.EXE > nul
  2⤵
  - Deletes itself
  PID:2168

C:\Windows\Debug\ayahost.exe
C:\Windows\Debug\ayahost.exe
1⤵
- Executes dropped EXE
PID:2816

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Debug\ayahost.exe

Filesize
72KB

MD5
21e994fd7478d0d49bc273c5d5584aa4

SHA1
a43d5e8ef0151c43323d0edf94164e35a2dc69e3

SHA256
94d295d857a201eb4ad9575d0aca92843c870fcd3f7849b99ede7bc04b257f08

SHA512
8d57af7fd6a831325add4dead8ef9ff2133334225a45244a71f6082e1e751fe86095d2e66fd530223bf3262c4d8b624026b5ff2ada31c10e5fbc3927173b9c8e

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads