5bd781d69f61aefe65034c6602a9ddcfc8ca2d0b1e19c6e240126efe29994bdc

Analysis

max time kernel
141s
max time network
125s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
31-10-2023 08:40

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General

Target

NEAS.d33e60f3d729c3d76233258601398387.exe
Size

157KB
MD5

d33e60f3d729c3d76233258601398387
SHA1

ce407014f7b07cf54076f93cae7569330069a098
SHA256

5bd781d69f61aefe65034c6602a9ddcfc8ca2d0b1e19c6e240126efe29994bdc
SHA512

f6a4b02717916f5c86206ae36d8d02159c3cdb88d12ca44938c7537bbc0f060aab1f6040429b24339223155a13dd168382de329f286dcbae54d4289759f37bed
SSDEEP

384:+BdCJAKQDuuOFZyUVpULCgDb2prxVTw24I+6Al6zKyXxKDglgTlkgUH/a7wwwp:MdCyTDcZyUpULCgodM96eyXsOf4wwwp

Score

8^/10

evasion upx

Malware Config

Signatures

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
2236	attrib.exe

Deletes itself 1 IoCs

pid	Process
2728	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2696	iuyhost.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2232-0-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/files/0x00060000000120bd-3.dat	upx
behavioral1/files/0x00060000000120bd-4.dat	upx
behavioral1/memory/2232-5-0x0000000000400000-0x0000000000427000-memory.dmp	upx
behavioral1/memory/2696-6-0x0000000000400000-0x0000000000427000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\iuyhost.exe	NEAS.d33e60f3d729c3d76233258601398387.exe
File opened for modification	C:\Windows\Debug\iuyhost.exe	NEAS.d33e60f3d729c3d76233258601398387.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	2232	NEAS.d33e60f3d729c3d76233258601398387.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2236	2232	NEAS.d33e60f3d729c3d76233258601398387.exe	28
PID 2232 wrote to memory of 2236	2232	NEAS.d33e60f3d729c3d76233258601398387.exe	28
PID 2232 wrote to memory of 2236	2232	NEAS.d33e60f3d729c3d76233258601398387.exe	28
PID 2232 wrote to memory of 2236	2232	NEAS.d33e60f3d729c3d76233258601398387.exe	28
PID 2232 wrote to memory of 2728	2232	NEAS.d33e60f3d729c3d76233258601398387.exe	31
PID 2232 wrote to memory of 2728	2232	NEAS.d33e60f3d729c3d76233258601398387.exe	31
PID 2232 wrote to memory of 2728	2232	NEAS.d33e60f3d729c3d76233258601398387.exe	31
PID 2232 wrote to memory of 2728	2232	NEAS.d33e60f3d729c3d76233258601398387.exe	31

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2236	attrib.exe

C:\Users\Admin\AppData\Local\Temp\NEAS.d33e60f3d729c3d76233258601398387.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.d33e60f3d729c3d76233258601398387.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2232
- 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:2236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\NEASD3~1.EXE > nul
  2⤵
  - Deletes itself
  PID:2728

C:\Windows\Debug\iuyhost.exe
C:\Windows\Debug\iuyhost.exe
1⤵
- Executes dropped EXE
PID:2696

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

Replay Monitor

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Downloads

C:\Windows\Debug\iuyhost.exe

Filesize
157KB

MD5
5bbd57d50ceba73a3cb8e1c4626728cf

SHA1
877d5993568bc7c6da03d30dd106e59cc8a55337

SHA256
c7e61a5e031cf07d696255c200e8a8ce52056e697dcc53afb5f92b9376ccab20

SHA512
c6c951dc4100a79fa28cbaa1afac7aa7279e43e6594fbbbd6e41c5af35c09c0accde2c983cd5380832048ce0e5a18e6473f336e71da9d8bfed1353d605f336c9

Download Submit
C:\Windows\debug\iuyhost.exe

Filesize
157KB

MD5
5bbd57d50ceba73a3cb8e1c4626728cf

SHA1
877d5993568bc7c6da03d30dd106e59cc8a55337

SHA256
c7e61a5e031cf07d696255c200e8a8ce52056e697dcc53afb5f92b9376ccab20

SHA512
c6c951dc4100a79fa28cbaa1afac7aa7279e43e6594fbbbd6e41c5af35c09c0accde2c983cd5380832048ce0e5a18e6473f336e71da9d8bfed1353d605f336c9

Download Submit
memory/2232-0-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2232-5-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2696-6-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads