e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb

General

Target

e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe
Size

15KB
MD5

b525d4cdf2c87f49308c0ff102831385
SHA1

4f72728c2fc111be59fd8b1f2b6bd1bca0edd8ab
SHA256

e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb
SHA512

12f8407251641216131f4d05493a7e1e7c37cca245aef5169f9be05289bd776fc0a3c4d1c8dd8fc1ecb64ce0f7afda0d3f12233ca7e285a85ace9b2db2e867c0
SSDEEP

384:IO3qdXlIQV0YXd45xuYiMcRWnPbeVGWLp:IO3EVdV0YXd4DuicNV3F

Score

9^/10

evasion upx

Malware Config

Signatures

Detects Windows executables referencing non-Windows User-Agents 6 IoCs

resource	yara_rule
behavioral1/memory/2980-7-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2936-8-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2936-11-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2936-14-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2936-17-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2936-20-0x0000000000400000-0x0000000000414000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

UPX dump on OEP (original entry point) 9 IoCs

resource	yara_rule
behavioral1/memory/2980-0-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/files/0x000c00000001227b-3.dat	UPX
behavioral1/memory/2936-5-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/memory/2980-7-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/memory/2936-8-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/memory/2936-11-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/memory/2936-14-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/memory/2936-17-0x0000000000400000-0x0000000000414000-memory.dmp	UPX
behavioral1/memory/2936-20-0x0000000000400000-0x0000000000414000-memory.dmp	UPX

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
2852	attrib.exe

Deletes itself 1 IoCs

pid	Process
2604	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2936	ayahost.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2980-0-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/files/0x000c00000001227b-3.dat	upx
behavioral1/memory/2936-5-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2980-7-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2936-8-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2936-11-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2936-14-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2936-17-0x0000000000400000-0x0000000000414000-memory.dmp	upx
behavioral1/memory/2936-20-0x0000000000400000-0x0000000000414000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\ayahost.exe	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe
File opened for modification	C:\Windows\Debug\ayahost.exe	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.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	2980	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2980 wrote to memory of 2852	2980	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe	28
PID 2980 wrote to memory of 2852	2980	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe	28
PID 2980 wrote to memory of 2852	2980	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe	28
PID 2980 wrote to memory of 2852	2980	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe	28
PID 2980 wrote to memory of 2604	2980	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe	31
PID 2980 wrote to memory of 2604	2980	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe	31
PID 2980 wrote to memory of 2604	2980	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe	31
PID 2980 wrote to memory of 2604	2980	e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe	31

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2852	attrib.exe

C:\Users\Admin\AppData\Local\Temp\e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe
"C:\Users\Admin\AppData\Local\Temp\e9b52f3662e306cd55401b5e755e8eff28d185e9586207cb696299f0277f12fb.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2980
- 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:2852
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\E9B52F~1.EXE > nul
  2⤵
  - Deletes itself
  PID:2604

C:\Windows\Debug\ayahost.exe
C:\Windows\Debug\ayahost.exe
1⤵
- Executes dropped EXE
PID:2936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

2

T1564.001

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Debug\ayahost.exe

Filesize
15KB

MD5
35d67b57c0aa8f2f1b2d4e4776a7128c

SHA1
9c3b051175c03bc0b4136639edf6f25a9a501fc9

SHA256
6236c91fcf5639671e70325d410c5e92ef4cb816ce7ce469cf2a0ed0bdb2a873

SHA512
fb958154b0df5e90d8777f1ba8ee5b5451f1430e5d863c0a9e4ae4c42a7cb44a1ab633089d9d339dfcce33eed41f382ef57dfd069dcd4324eabd75f783af2804

Download Submit
memory/2936-5-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2936-8-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2936-11-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2936-14-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2936-17-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2936-20-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2980-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2980-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads