39fe6cf655f0881af0b3ba2a02e7b2803ca195788279f177696dbc6c1be77eb8

General

Target

22db929365b57752f6181d4b23016241.exe
Size

33KB
MD5

22db929365b57752f6181d4b23016241
SHA1

30efa866aea90cf92998826c113d08b4e9f66d2f
SHA256

39fe6cf655f0881af0b3ba2a02e7b2803ca195788279f177696dbc6c1be77eb8
SHA512

d1ae032f4c41668709cc0630c35e80325443155319d4a4c4044ab595d6cd729660f5c40c160d5cddd0892ac937af5a0351b059b4b5603a979de000f2e0b358c2
SSDEEP

768:UnykwyDKF0Pw95DDaxq56pv4tZiR+T0vjFfbM:Unyk9ojmpp8a+T0Fb

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
2636	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
2636	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/1904-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1904-11-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Drops file in System32 directory 11 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\yuksuser.dll	22db929365b57752f6181d4b23016241.exe
File created	C:\Windows\SysWOW64\ksuser.dll	22db929365b57752f6181d4b23016241.exe
File created	C:\Windows\SysWOW64\yumidimap.dll	22db929365b57752f6181d4b23016241.exe
File created	C:\Windows\SysWOW64\midimap.dll	22db929365b57752f6181d4b23016241.exe
File created	C:\Windows\SysWOW64\dllcache\msimg32.dll	22db929365b57752f6181d4b23016241.exe
File opened for modification	C:\Windows\SysWOW64\yuksuser.dll	22db929365b57752f6181d4b23016241.exe
File created	C:\Windows\SysWOW64\dllcache\ksuser.dll	22db929365b57752f6181d4b23016241.exe
File created	C:\Windows\SysWOW64\dllcache\midimap.dll	22db929365b57752f6181d4b23016241.exe
File created	C:\Windows\SysWOW64\yumsimg32.dll	22db929365b57752f6181d4b23016241.exe
File created	C:\Windows\SysWOW64\msimg32.dll	22db929365b57752f6181d4b23016241.exe
File created	C:\Windows\SysWOW64\gggapp23.dll	22db929365b57752f6181d4b23016241.exe

Launches sc.exe 2 IoCs

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

pid	Process
2516	sc.exe
1932	sc.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1904	22db929365b57752f6181d4b23016241.exe
1904	22db929365b57752f6181d4b23016241.exe
1904	22db929365b57752f6181d4b23016241.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1904	22db929365b57752f6181d4b23016241.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1904 wrote to memory of 2392	1904	22db929365b57752f6181d4b23016241.exe	16
PID 1904 wrote to memory of 2392	1904	22db929365b57752f6181d4b23016241.exe	16
PID 1904 wrote to memory of 2392	1904	22db929365b57752f6181d4b23016241.exe	16
PID 1904 wrote to memory of 2392	1904	22db929365b57752f6181d4b23016241.exe	16
PID 1904 wrote to memory of 1932	1904	22db929365b57752f6181d4b23016241.exe	21
PID 1904 wrote to memory of 1932	1904	22db929365b57752f6181d4b23016241.exe	21
PID 1904 wrote to memory of 1932	1904	22db929365b57752f6181d4b23016241.exe	21
PID 1904 wrote to memory of 1932	1904	22db929365b57752f6181d4b23016241.exe	21
PID 1904 wrote to memory of 2516	1904	22db929365b57752f6181d4b23016241.exe	20
PID 1904 wrote to memory of 2516	1904	22db929365b57752f6181d4b23016241.exe	20
PID 1904 wrote to memory of 2516	1904	22db929365b57752f6181d4b23016241.exe	20
PID 1904 wrote to memory of 2516	1904	22db929365b57752f6181d4b23016241.exe	20
PID 2392 wrote to memory of 3044	2392	net.exe	17
PID 2392 wrote to memory of 3044	2392	net.exe	17
PID 2392 wrote to memory of 3044	2392	net.exe	17
PID 2392 wrote to memory of 3044	2392	net.exe	17
PID 1904 wrote to memory of 2636	1904	22db929365b57752f6181d4b23016241.exe	35
PID 1904 wrote to memory of 2636	1904	22db929365b57752f6181d4b23016241.exe	35
PID 1904 wrote to memory of 2636	1904	22db929365b57752f6181d4b23016241.exe	35
PID 1904 wrote to memory of 2636	1904	22db929365b57752f6181d4b23016241.exe	35
PID 1904 wrote to memory of 2636	1904	22db929365b57752f6181d4b23016241.exe	35
PID 1904 wrote to memory of 2636	1904	22db929365b57752f6181d4b23016241.exe	35
PID 1904 wrote to memory of 2636	1904	22db929365b57752f6181d4b23016241.exe	35

C:\Windows\SysWOW64\net.exe
net stop cryptsvc
1⤵
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Windows\SysWOW64\net1.exe
  C:\Windows\system32\net1 stop cryptsvc
  2⤵
  PID:3044

C:\Windows\SysWOW64\sc.exe
sc delete cryptsvc
1⤵
- Launches sc.exe
PID:2516

C:\Windows\SysWOW64\sc.exe
sc config cryptsvc start= disabled
1⤵
- Launches sc.exe
PID:1932

C:\Users\Admin\AppData\Local\Temp\22db929365b57752f6181d4b23016241.exe
"C:\Users\Admin\AppData\Local\Temp\22db929365b57752f6181d4b23016241.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1904
- C:\Windows\SysWOW64\rundll32.exe
  C:\Users\Admin\AppData\Local\Temp\1703764730.dat, ServerMain c:\users\admin\appdata\local\temp\22db929365b57752f6181d4b23016241.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  PID:2636

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\1703764730.dat

Filesize
33KB

MD5
6a40e894109842465daee6a885c9c63b

SHA1
a1920cd29e08ca0f582b885d2287d78a22da3650

SHA256
7a52ffaa9a745615b5b613cab93253ad7f44c64eed8c03c91cbfd0575998b429

SHA512
7ba8452bb78813ac757b41ace66e6dbd7e2a5a1fff6dab1bfd873709dc538f1b5e43342745b76828d56be27dad0d61c9ae91e2494c9cf8b6e8e35915c5aaad1e

Download Submit
memory/1904-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1904-11-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

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