b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1

General

Target

b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe
Size

3.7MB
MD5

b5ac76d2d304e0d65a1645791c6294f0
SHA1

c12a3f2710f724d2e7a5b7d9ba21772650c7befa
SHA256

b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1
SHA512

28fe3dababfb157b785db98d1f1f23c1fc1e21cb4a5bdd1f9885f0a946e590681ecc0e0ad8c3eecc6a2fa6425847c283b22b0f8f97e59c7318d71f84b16430ca
SSDEEP

98304:k4wc3evzvh7phFW/Qwk8khbNqk9mgHdk6K1bDZ:PwcipFW/Qw7ob0gH6F/Z

Score

8^/10

defense_evasion discovery evasion

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
4000	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe

Executes dropped EXE 1 IoCs

pid	Process
404	riyhost.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\riyhost.exe	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe
File opened for modification	C:\Windows\Debug\riyhost.exe	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe
File opened for modification	C:\Windows\Debug\riyhost.exe	attrib.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	riyhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

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

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	436	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 436 wrote to memory of 4000	436	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe	82
PID 436 wrote to memory of 4000	436	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe	82
PID 436 wrote to memory of 4000	436	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe	82
PID 436 wrote to memory of 2032	436	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe	85
PID 436 wrote to memory of 2032	436	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe	85
PID 436 wrote to memory of 2032	436	b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe	85

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4000	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe
"C:\Users\Admin\AppData\Local\Temp\b86ff85d1f572275909416bb9f3bb7539a91ab5e1a43ea1c9fbf2a89492357c1N.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:436
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\riyhost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Views/modifies file attributes
  PID:4000
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\B86FF8~1.EXE > nul
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2032

C:\Windows\Debug\riyhost.exe
C:\Windows\Debug\riyhost.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Checks processor information in registry
PID:404

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

Indicator Removal

1

T1070

File Deletion

1

T1070.004

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\debug\riyhost.exe

Filesize
3.7MB

MD5
1daf12b6d53246997e72b03323ccc33f

SHA1
23176c762a7266dc5e1b96b46f45d1a279c3ae71

SHA256
d560237dbe75606738b3671b26c2d495498e6b502440774af6c16b479c184ce8

SHA512
b97dbc45d0ac417a58eca6552d1a6a5b2f200d45c0e952f852bdee8a8a2305ce09194ee243b9f660820d553239e310808ffef9d5ca58c923491f2afa2384482f

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads