af7f35abd13a1349b32395ed58b6c76569cd26c2924c42d840ec4c43949a03fe

General

Target

ViRuS/8.exe
Size

38KB
MD5

e4186d78db74715290e416a7ef0de2c7
SHA1

c9e195733b316fb796e11cfc543a15130e5e52fd
SHA256

9742ced602d1081aad4b63b45206591b70344eae1963c9d5eccbf65776cfb8f4
SHA512

e8bbfb6df2c4de2a576c022d768a5533ff59ecfac191c1ffb56b4b7b41d09ddaff1e659b37b12f254a402afd2518515c3122292c3029636bc71d955e7cc40b46
SSDEEP

768:2o1g8s6A481XR9wBzLkD6Re6JGnY8zrBAxAlYoC8UtDT0M9f6Ovh:2oud6XKRyBXkzdYqFMAlYNPT3h

Score

10^/10

discovery evasion execution spyware stealer upx

Malware Config

Signatures

Disables service(s) 3 TTPs
evasion execution

Windows Service
T1543.003

Service Stop
T1489

Service Execution
T1569.002
Stops running service(s) 4 TTPs
evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

Deletes itself 1 IoCs

pid	Process
3928	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3928	rundll32.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Drops file in System32 directory 11 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\dllcache\ksuser.dll	8.exe
File created	C:\Windows\SysWOW64\midimap.dll	8.exe
File created	C:\Windows\SysWOW64\dllcache\midimap.dll	8.exe
File created	C:\Windows\SysWOW64\yumsimg32.dll	8.exe
File created	C:\Windows\SysWOW64\sysapp10.dll	8.exe
File created	C:\Windows\SysWOW64\dllcache\msimg32.dll	8.exe
File created	C:\Windows\SysWOW64\yuksuser.dll	8.exe
File opened for modification	C:\Windows\SysWOW64\yuksuser.dll	8.exe
File created	C:\Windows\SysWOW64\ksuser.dll	8.exe
File created	C:\Windows\SysWOW64\yumidimap.dll	8.exe
File created	C:\Windows\SysWOW64\msimg32.dll	8.exe

UPX packed file 3 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3308-0-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/memory/3308-13-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral2/memory/3308-16-0x0000000000400000-0x0000000000418000-memory.dmp	upx

Launches sc.exe 2 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
1376	sc.exe
1392	sc.exe

System Location Discovery: System Language Discovery 1 TTPs 6 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	8.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3308	8.exe
3308	8.exe
3308	8.exe
3308	8.exe
3308	8.exe
3308	8.exe
3308	8.exe
3308	8.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3308	8.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3308 wrote to memory of 728	3308	8.exe	86
PID 3308 wrote to memory of 728	3308	8.exe	86
PID 3308 wrote to memory of 728	3308	8.exe	86
PID 3308 wrote to memory of 1392	3308	8.exe	87
PID 3308 wrote to memory of 1392	3308	8.exe	87
PID 3308 wrote to memory of 1392	3308	8.exe	87
PID 3308 wrote to memory of 1376	3308	8.exe	88
PID 3308 wrote to memory of 1376	3308	8.exe	88
PID 3308 wrote to memory of 1376	3308	8.exe	88
PID 728 wrote to memory of 4648	728	net.exe	92
PID 728 wrote to memory of 4648	728	net.exe	92
PID 728 wrote to memory of 4648	728	net.exe	92
PID 3308 wrote to memory of 3928	3308	8.exe	94
PID 3308 wrote to memory of 3928	3308	8.exe	94
PID 3308 wrote to memory of 3928	3308	8.exe	94

C:\Users\Admin\AppData\Local\Temp\ViRuS\8.exe
"C:\Users\Admin\AppData\Local\Temp\ViRuS\8.exe"
1⤵
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3308
- C:\Windows\SysWOW64\net.exe
  net stop cryptsvc
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:728
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop cryptsvc
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4648
- C:\Windows\SysWOW64\sc.exe
  sc config cryptsvc start= disabled
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1392
- C:\Windows\SysWOW64\sc.exe
  sc delete cryptsvc
  2⤵
  - Launches sc.exe
  - System Location Discovery: System Language Discovery
  PID:1376
- C:\Windows\SysWOW64\rundll32.exe
  C:\Users\Admin\AppData\Local\Temp\1729190030.dat, ServerMain c:\users\admin\appdata\local\temp\virus\8.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  PID:3928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

2

T1569

Service Execution

2

T1569.002

Persistence

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Service Stop

2

T1489

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\1729190030.dat

Filesize
41KB

MD5
e6a024bc739e28bbadb91c53fb719293

SHA1
b2dc213daa70e78500a92fec9a629fe65462430e

SHA256
ec9ed53a5168879dfb7b9360d60c09ca651cdba7724c779826333272c813f5cd

SHA512
19460689fc05e2a78318f6f0a35380edc9fc60ffa60f19d92a534d14cec7304e96d3fd128d3ca7da259598d6b7b1d96afc01f7413af3e5f7bf6d9c7cbf3040ca

Download Submit
memory/3308-0-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/3308-13-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/3308-16-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download

Analysis

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