5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424

Analysis

max time kernel
141s
max time network
123s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
15/06/2024, 21:56

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General

Target

5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe
Size

73KB
MD5

874771f4c79ed239611683ad905ec306
SHA1

2c438876e4d264242f842bbd6aeb9025936e3b90
SHA256

5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424
SHA512

858e7b428e149ed07e8c53e4a132e055844e084d1dcefdcf9fe242680da4fd84a12af5f51bdd7c5e7eb9e92a9173e9aaeedb6df927810e74316e0a505df66f38
SSDEEP

768:OrItKyw5WHXfQmjIiIk9ecAakMb96ZyXuDLdibfffsffff2ZZZZnAAAV:Or3Z5IfQmv81abyyXcZibfffsffffN

Score

9^/10

evasion

Malware Config

Signatures

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

resource	yara_rule
behavioral1/files/0x000b00000001472f-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
3040	attrib.exe

Deletes itself 1 IoCs

pid	Process
2624	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2496	iuyhost.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\iuyhost.exe	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe
File opened for modification	C:\Windows\Debug\iuyhost.exe	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe
File opened for modification	C:\Windows\Debug\iuyhost.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	2552	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 3040	2552	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe	28
PID 2552 wrote to memory of 3040	2552	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe	28
PID 2552 wrote to memory of 3040	2552	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe	28
PID 2552 wrote to memory of 3040	2552	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe	28
PID 2552 wrote to memory of 2624	2552	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe	31
PID 2552 wrote to memory of 2624	2552	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe	31
PID 2552 wrote to memory of 2624	2552	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe	31
PID 2552 wrote to memory of 2624	2552	5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe	31

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3040	attrib.exe

C:\Users\Admin\AppData\Local\Temp\5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe
"C:\Users\Admin\AppData\Local\Temp\5a4f32974704b46ce37792fe359f0730715c4b6e92ac34ccf61f3b5bf5641424.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\iuyhost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - Views/modifies file attributes
  PID:3040
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\5A4F32~1.EXE > nul
  2⤵
  - Deletes itself
  PID:2624

C:\Windows\Debug\iuyhost.exe
C:\Windows\Debug\iuyhost.exe
1⤵
- Executes dropped EXE
PID:2496

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\iuyhost.exe

Filesize
73KB

MD5
2f65a9c007b8ec58a75460e74ace47ba

SHA1
6d13bc7f94384dc1fd4cc437559bf9f61bc1e393

SHA256
da3c1df88402c34b4bbabf3be246dd696f73dd38dc4b843431146378616cd397

SHA512
0f795b1c68599c17a9881feb4797f34a5f8b7c377a1f85119ca9ee03925f2beb1ab898b88b5b260291f5854bdefd11ba21b205db498a891e3e948711a3216b41

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads