966aa9010dcd3fdd35f00b995066013f1a686c4b8364cd5037b5eaed6f1140df

General

Target

desserpcx.exe
Size

2.0MB
MD5

728df519e8cfe0d692a8f85ac238436f
SHA1

55cd413c2bdfe8803b3a4a6abca2f3b8e0b606f0
SHA256

966aa9010dcd3fdd35f00b995066013f1a686c4b8364cd5037b5eaed6f1140df
SHA512

dd2a7842a7489256d939e7f7ba67d14dd3f02d53fe19c515550905f26c4899881333d793dec7160275217564f637823ae456399beb4763b357822c3c6d6a77eb

Score

6^/10

Malware Config

Signatures

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3848 wrote to memory of 2132	3848	desserpcx.exe	72
PID 3848 wrote to memory of 2132	3848	desserpcx.exe	72
PID 3848 wrote to memory of 2132	3848	desserpcx.exe	72
PID 3848 wrote to memory of 2132	3848	desserpcx.exe	72
PID 2132 wrote to memory of 2484	2132	InstallUtil.exe	73
PID 2132 wrote to memory of 2484	2132	InstallUtil.exe	73
PID 2132 wrote to memory of 2484	2132	InstallUtil.exe	73
PID 2484 wrote to memory of 3504	2484	csc.exe	75
PID 2484 wrote to memory of 3504	2484	csc.exe	75
PID 2484 wrote to memory of 3504	2484	csc.exe	75

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3848	desserpcx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3848 set thread context of 2132	3848	desserpcx.exe	72

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2132	InstallUtil.exe

JavaScript code in executable 1 IoCs

resource	yara_rule
behavioral2/files/0x000100000001ad5c-4.dat	js

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	InstallUtil.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	InstallUtil.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1231583446-2617009595-2137880041-1000\Software\Microsoft\Windows\CurrentVersion\Run\omXGi = "C:\\OWZMOTQA\\omXGiI\\omXGiIsRb.vbs"	desserpcx.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	InstallUtil.exe
File created	C:\Windows\assembly\Desktop.ini	InstallUtil.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\desserpcx.exe
"C:\Users\Admin\AppData\Local\Temp\desserpcx.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
- Adds Run key to start application
PID:3848
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
  "C:\Windows\\Microsoft.NET\\Framework\\v2.0.50727\\InstallUtil.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  - Suspicious use of AdjustPrivilegeToken
  - Drops desktop.ini file(s)
  - Drops file in Windows directory
  PID:2132
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe
    "C:\Windows\Microsoft.NET\Framework\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\trziem3q.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2484
  - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
      C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES7585.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC7584.tmp"
      4⤵
      PID:3504

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2132-0-0x0000000000400000-0x000000000053E000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing