6a9ec3ae49dfab6ea45e73634dafd30ed07c8e637722821a1aa699b0d3f4ce0b

Analysis

max time kernel
86s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
27-01-2024 16:28

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General

Target

7ab8a9ca2e3b444553a9d68efae8408c.exe
Size

34KB
MD5

7ab8a9ca2e3b444553a9d68efae8408c
SHA1

16d7c7cd93c62fbf1db63debabf301e3f6396a3d
SHA256

6a9ec3ae49dfab6ea45e73634dafd30ed07c8e637722821a1aa699b0d3f4ce0b
SHA512

c9ea4659d1d05c7155f84e35accbd32fde35788d20035d6ccb3426e451439f2167c9640689c31491a3483b4662890c3e085f015c921c0979a41a2cbbfcae0d92
SSDEEP

768:ZVd51InrypdFX6fxp8QVCd1YiiuzAD+/CGqcq45aJIZEinmQwJ7:VaoWNY1YixzgQ6IDF67

Score

8^/10

evasion 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
1996	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1996	rundll32.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1332-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/1332-10-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Drops file in System32 directory 8 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\YUmidimap.dll	7ab8a9ca2e3b444553a9d68efae8408c.exe
File created	C:\Windows\SysWOW64\midimap.dll	7ab8a9ca2e3b444553a9d68efae8408c.exe
File created	C:\Windows\SysWOW64\dllcache\midimap.dll	7ab8a9ca2e3b444553a9d68efae8408c.exe
File created	C:\Windows\SysWOW64\sysapp1.dll	7ab8a9ca2e3b444553a9d68efae8408c.exe
File created	C:\Windows\SysWOW64\YUksuser.dll	7ab8a9ca2e3b444553a9d68efae8408c.exe
File opened for modification	C:\Windows\SysWOW64\YUksuser.dll	7ab8a9ca2e3b444553a9d68efae8408c.exe
File created	C:\Windows\SysWOW64\ksuser.dll	7ab8a9ca2e3b444553a9d68efae8408c.exe
File created	C:\Windows\SysWOW64\dllcache\ksuser.dll	7ab8a9ca2e3b444553a9d68efae8408c.exe

Launches sc.exe 2 IoCs

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

pid	Process
2036	sc.exe
3360	sc.exe

Runs net.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1332	7ab8a9ca2e3b444553a9d68efae8408c.exe
1332	7ab8a9ca2e3b444553a9d68efae8408c.exe
1332	7ab8a9ca2e3b444553a9d68efae8408c.exe
1332	7ab8a9ca2e3b444553a9d68efae8408c.exe
1332	7ab8a9ca2e3b444553a9d68efae8408c.exe
1332	7ab8a9ca2e3b444553a9d68efae8408c.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1332	7ab8a9ca2e3b444553a9d68efae8408c.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1332 wrote to memory of 4240	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	84
PID 1332 wrote to memory of 4240	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	84
PID 1332 wrote to memory of 4240	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	84
PID 1332 wrote to memory of 2036	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	85
PID 1332 wrote to memory of 2036	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	85
PID 1332 wrote to memory of 2036	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	85
PID 1332 wrote to memory of 3360	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	86
PID 1332 wrote to memory of 3360	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	86
PID 1332 wrote to memory of 3360	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	86
PID 1332 wrote to memory of 1996	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	89
PID 1332 wrote to memory of 1996	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	89
PID 1332 wrote to memory of 1996	1332	7ab8a9ca2e3b444553a9d68efae8408c.exe	89
PID 4240 wrote to memory of 3572	4240	net.exe	91
PID 4240 wrote to memory of 3572	4240	net.exe	91
PID 4240 wrote to memory of 3572	4240	net.exe	91

C:\Users\Admin\AppData\Local\Temp\7ab8a9ca2e3b444553a9d68efae8408c.exe
"C:\Users\Admin\AppData\Local\Temp\7ab8a9ca2e3b444553a9d68efae8408c.exe"
1⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1332
- C:\Windows\SysWOW64\net.exe
  net stop cryptsvc
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4240
- - C:\Windows\SysWOW64\net1.exe
    C:\Windows\system32\net1 stop cryptsvc
    3⤵
    PID:3572
- C:\Windows\SysWOW64\sc.exe
  sc config cryptsvc start= disabled
  2⤵
  - Launches sc.exe
  PID:2036
- C:\Windows\SysWOW64\sc.exe
  sc delete cryptsvc
  2⤵
  - Launches sc.exe
  PID:3360
- C:\Windows\SysWOW64\rundll32.exe
  C:\Users\Admin\AppData\Local\Temp\1706372935.dat, ServerMain c:\users\admin\appdata\local\temp\7ab8a9ca2e3b444553a9d68efae8408c.exe
  2⤵
  - Deletes itself
  - Loads dropped DLL
  PID:1996

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

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

C:\Windows\SysWOW64\sysapp1.dll

Filesize
34KB

MD5
86053734fb9de74fd76415518e35623b

SHA1
910f83249debeda7b456d891c9ab85393f917163

SHA256
7f25278e38164beb60ae88017c211b9f04c03bc9ae894da03d44d404bb1209d9

SHA512
224f23ce6e4507ba84b3997be7e4ddd1f593975d18736822c6852a8f3c78f1f1ace1c0f1644f4f88fcd6d44fe327d23b72a3cc39292494f5f0c5c40ad1ebffc5

Download Submit
memory/1332-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1332-10-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download