972c0c557aef3b8373ce28cd2c13d09091a30135263cf1af27901e49370ab4bd

General

Target

59af1666246388b5d5ab790612e0d43a.exe
Size

33KB
MD5

59af1666246388b5d5ab790612e0d43a
SHA1

c5ba046ad5978343dc87466c76df0a1b82a9a53f
SHA256

972c0c557aef3b8373ce28cd2c13d09091a30135263cf1af27901e49370ab4bd
SHA512

1dcad08f1640aa43d638962800b836cebe50ab39fe34294a02f09c28e663078845c8ff175c133aa2d1de2cb585667ace2652efabee101cc0e8ef9ae4e4d6317f
SSDEEP

768:RBD4C5u76tYBgNO7Q/XuL6C5sUB2Yys3/LaSr:nDdu77BgCWXO6hYys3/LaSr

Score

8^/10

evasion spyware stealer upx

Malware Config

Signatures

Stops running service(s) 3 TTPs
evasion

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Deletes itself 1 IoCs

pid	Process
1728	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1728	rundll32.exe

Reads user/profile data of web browsers 2 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

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2536-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/2536-9-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Drops file in System32 directory 8 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ksuser.dll	59af1666246388b5d5ab790612e0d43a.exe
File created	C:\Windows\SysWOW64\dllcache\ksuser.dll	59af1666246388b5d5ab790612e0d43a.exe
File created	C:\Windows\SysWOW64\YUmidimap.dll	59af1666246388b5d5ab790612e0d43a.exe
File created	C:\Windows\SysWOW64\midimap.dll	59af1666246388b5d5ab790612e0d43a.exe
File created	C:\Windows\SysWOW64\dllcache\midimap.dll	59af1666246388b5d5ab790612e0d43a.exe
File created	C:\Windows\SysWOW64\sysapp19.dll	59af1666246388b5d5ab790612e0d43a.exe
File created	C:\Windows\SysWOW64\YUksuser.dll	59af1666246388b5d5ab790612e0d43a.exe
File opened for modification	C:\Windows\SysWOW64\YUksuser.dll	59af1666246388b5d5ab790612e0d43a.exe

Launches sc.exe 2 IoCs

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

pid	Process
1968	sc.exe
1264	sc.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2536	59af1666246388b5d5ab790612e0d43a.exe
2536	59af1666246388b5d5ab790612e0d43a.exe
2536	59af1666246388b5d5ab790612e0d43a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2536	59af1666246388b5d5ab790612e0d43a.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 3012	2536	59af1666246388b5d5ab790612e0d43a.exe	28
PID 2536 wrote to memory of 3012	2536	59af1666246388b5d5ab790612e0d43a.exe	28
PID 2536 wrote to memory of 3012	2536	59af1666246388b5d5ab790612e0d43a.exe	28
PID 2536 wrote to memory of 3012	2536	59af1666246388b5d5ab790612e0d43a.exe	28
PID 2536 wrote to memory of 1968	2536	59af1666246388b5d5ab790612e0d43a.exe	30
PID 2536 wrote to memory of 1968	2536	59af1666246388b5d5ab790612e0d43a.exe	30
PID 2536 wrote to memory of 1968	2536	59af1666246388b5d5ab790612e0d43a.exe	30
PID 2536 wrote to memory of 1968	2536	59af1666246388b5d5ab790612e0d43a.exe	30
PID 2536 wrote to memory of 1264	2536	59af1666246388b5d5ab790612e0d43a.exe	31
PID 2536 wrote to memory of 1264	2536	59af1666246388b5d5ab790612e0d43a.exe	31
PID 2536 wrote to memory of 1264	2536	59af1666246388b5d5ab790612e0d43a.exe	31
PID 2536 wrote to memory of 1264	2536	59af1666246388b5d5ab790612e0d43a.exe	31
PID 2536 wrote to memory of 1728	2536	59af1666246388b5d5ab790612e0d43a.exe	34
PID 2536 wrote to memory of 1728	2536	59af1666246388b5d5ab790612e0d43a.exe	34
PID 2536 wrote to memory of 1728	2536	59af1666246388b5d5ab790612e0d43a.exe	34
PID 2536 wrote to memory of 1728	2536	59af1666246388b5d5ab790612e0d43a.exe	34
PID 2536 wrote to memory of 1728	2536	59af1666246388b5d5ab790612e0d43a.exe	34
PID 2536 wrote to memory of 1728	2536	59af1666246388b5d5ab790612e0d43a.exe	34
PID 2536 wrote to memory of 1728	2536	59af1666246388b5d5ab790612e0d43a.exe	34
PID 3012 wrote to memory of 2564	3012	net.exe	35
PID 3012 wrote to memory of 2564	3012	net.exe	35
PID 3012 wrote to memory of 2564	3012	net.exe	35
PID 3012 wrote to memory of 2564	3012	net.exe	35

C:\Users\Admin\AppData\Local\Temp\59af1666246388b5d5ab790612e0d43a.exe
"C:\Users\Admin\AppData\Local\Temp\59af1666246388b5d5ab790612e0d43a.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2536
- C:\Windows\SysWOW64\net.exe
  net stop cryptsvc
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3012
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop cryptsvc
    3⤵
    PID:2564
- C:\Windows\SysWOW64\sc.exe
  sc config cryptsvc start= disabled
  2⤵
  - Launches sc.exe
  PID:1968
- C:\Windows\SysWOW64\sc.exe
  sc delete cryptsvc
  2⤵
  - Launches sc.exe
  PID:1264
- C:\Windows\SysWOW64\rundll32.exe
  C:\Users\Admin\AppData\Local\Temp\1705188477.dat, ServerMain c:\users\admin\appdata\local\temp\59af1666246388b5d5ab790612e0d43a.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  PID:1728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Privilege Escalation

Create or Modify System Process

1

T1543

Windows Service

1

T1543.003

Defense Evasion

Impair Defenses

1

T1562

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Service Stop

1

T1489

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\1705188477.dat

Filesize
33KB

MD5
7cf98fc8422296a346bfe4eac9bf172a

SHA1
816d333f429eba90c94d780593b0461a1ddc6057

SHA256
ba75e448e0ad0201697e64c76dcf9e5755c7b3520f0033d97a3d86a73ed6613b

SHA512
cbd9853bb46c143bcb64efac2c1ef3c3ad3e6d698ab071ab19961a59ce035fde454dcb0415a7a2f2b6db740ad36b8cfc9e75b6d26fb79304149327d0717699b8

Download Submit
memory/2536-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2536-9-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

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