5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e

General

Target

5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe
Size

46KB
MD5

a00b5601e51ee9a9fb60fc7cd16e7086
SHA1

451b11966d4beec2bf09992895e1aa1e711b46bf
SHA256

5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e
SHA512

4d1347a577be4292e634a59741a8a790544fee153eb015365be380363dcc0d6ccfd58432b4892424f9e0218631deb681696bf5cf75be9f2c275d64232ececbc1
SSDEEP

768:hX0gWvCzuw6Uj9uGi45XOPxV5HNWnnnl000e999vddddIyyyOOtttb2222rRRRRL:6vCzuw6UD9Az5HNWnnn622222rRRRR6W

Score

9^/10

evasion upx

Malware Config

Signatures

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

resource	yara_rule
behavioral1/memory/2112-5-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2932-7-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2112-8-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2112-14-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2112-17-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2112-20-0x0000000000400000-0x0000000000416000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

UPX dump on OEP (original entry point) 8 IoCs

resource	yara_rule
behavioral1/memory/2932-0-0x0000000000400000-0x0000000000416000-memory.dmp	UPX
behavioral1/files/0x000b0000000160cc-3.dat	UPX
behavioral1/memory/2112-5-0x0000000000400000-0x0000000000416000-memory.dmp	UPX
behavioral1/memory/2932-7-0x0000000000400000-0x0000000000416000-memory.dmp	UPX
behavioral1/memory/2112-8-0x0000000000400000-0x0000000000416000-memory.dmp	UPX
behavioral1/memory/2112-14-0x0000000000400000-0x0000000000416000-memory.dmp	UPX
behavioral1/memory/2112-17-0x0000000000400000-0x0000000000416000-memory.dmp	UPX
behavioral1/memory/2112-20-0x0000000000400000-0x0000000000416000-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
3032	attrib.exe

Deletes itself 1 IoCs

pid	Process
1232	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
2112	ayahost.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2932-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/files/0x000b0000000160cc-3.dat	upx
behavioral1/memory/2112-5-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2932-7-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2112-8-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2112-14-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2112-17-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2112-20-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\ayahost.exe	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe
File opened for modification	C:\Windows\Debug\ayahost.exe	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.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

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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2932	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2932 wrote to memory of 3032	2932	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe	28
PID 2932 wrote to memory of 3032	2932	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe	28
PID 2932 wrote to memory of 3032	2932	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe	28
PID 2932 wrote to memory of 3032	2932	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe	28
PID 2932 wrote to memory of 1232	2932	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe	31
PID 2932 wrote to memory of 1232	2932	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe	31
PID 2932 wrote to memory of 1232	2932	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe	31
PID 2932 wrote to memory of 1232	2932	5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe	31

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3032	attrib.exe

C:\Users\Admin\AppData\Local\Temp\5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe
"C:\Users\Admin\AppData\Local\Temp\5b77f781b1b78549d568b288d5ad237fefc0f26160da1c25f06d611c0f89de4e.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2932
- 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:3032
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\5B77F7~1.EXE > nul
  2⤵
  - Deletes itself
  PID:1232

C:\Windows\Debug\ayahost.exe
C:\Windows\Debug\ayahost.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:2112

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\Debug\ayahost.exe

Filesize
47KB

MD5
7b8f5fb95736308b2aae3a41fbcc6e56

SHA1
2499320bba12f149050ddc4f88aae8628365833d

SHA256
30e665617f4fda64f7849da349fb7b182941cbba8e7d8c2be4b0ff0e23c9097b

SHA512
ea7de25b491e123dcafbf5b343fe7ea72f50ae260adc9f4e9c9c6f6552d496e26e18f812a7534e99df8026597fb05fec4c50d6e02b33809548f290a1aba44c40

Download Submit
memory/2112-5-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2112-8-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2112-14-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2112-17-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2112-20-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2932-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2932-7-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads