39fe6cf655f0881af0b3ba2a02e7b2803ca195788279f177696dbc6c1be77eb8

Analysis

max time kernel
206s
max time network
233s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
25/12/2023, 13:46

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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
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
behavioral2/memory/4056-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/4056-5-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Drops file in System32 directory 11 IoCs

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

Launches sc.exe 2 IoCs

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

pid	Process
2292	sc.exe
1472	sc.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4056	22db929365b57752f6181d4b23016241.exe
4056	22db929365b57752f6181d4b23016241.exe
4056	22db929365b57752f6181d4b23016241.exe
4056	22db929365b57752f6181d4b23016241.exe
4056	22db929365b57752f6181d4b23016241.exe
4056	22db929365b57752f6181d4b23016241.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4056	22db929365b57752f6181d4b23016241.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4056 wrote to memory of 3612	4056	22db929365b57752f6181d4b23016241.exe	90
PID 4056 wrote to memory of 3612	4056	22db929365b57752f6181d4b23016241.exe	90
PID 4056 wrote to memory of 3612	4056	22db929365b57752f6181d4b23016241.exe	90
PID 4056 wrote to memory of 1472	4056	22db929365b57752f6181d4b23016241.exe	92
PID 4056 wrote to memory of 1472	4056	22db929365b57752f6181d4b23016241.exe	92
PID 4056 wrote to memory of 1472	4056	22db929365b57752f6181d4b23016241.exe	92
PID 4056 wrote to memory of 2292	4056	22db929365b57752f6181d4b23016241.exe	91
PID 4056 wrote to memory of 2292	4056	22db929365b57752f6181d4b23016241.exe	91
PID 4056 wrote to memory of 2292	4056	22db929365b57752f6181d4b23016241.exe	91
PID 3612 wrote to memory of 1520	3612	net.exe	97
PID 3612 wrote to memory of 1520	3612	net.exe	97
PID 3612 wrote to memory of 1520	3612	net.exe	97

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:4056
- C:\Windows\SysWOW64\net.exe
  net stop cryptsvc
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3612
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop cryptsvc
    3⤵
    PID:1520
- C:\Windows\SysWOW64\sc.exe
  sc delete cryptsvc
  2⤵
  - Launches sc.exe
  PID:2292
- C:\Windows\SysWOW64\sc.exe
  sc config cryptsvc start= disabled
  2⤵
  - Launches sc.exe
  PID:1472

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\1703764792.dat

Filesize
33KB

MD5
4b259bd0f139a6bb03a2a77ce1ae3981

SHA1
657503834c08ce18895fce88a312c38c496a4e58

SHA256
d154adb3e32f2c423ce6a96784eb41cbbcf245eade41ab4e9184d901c5e1684d

SHA512
b409c79ae9e3a657820385efcdd541057c05faeb4acb0936aeada93c29bf9ce08dd583357b1ed8b9e54d1306df887f6b46a9486312ca84a3a61b9c8896b63ca6

Download Submit
memory/4056-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4056-5-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download