4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912

General

Target

4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe
Size

554KB
MD5

a4bb650a27719f16b8f659f330891663
SHA1

cc467e611100b7e6694136e1303aee0f402793b3
SHA256

4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912
SHA512

93bbfc43612aa47a73a1afe598c3a0b8373dddc94e9672582e13824bd5c446b73edbabb60dca0a98fea95786aa98ed595eb5058069338e7e073b229d68ae2e74
SSDEEP

12288:YQjLuRE4xKR72qKoe/ZWsYUxUKQzZZQZsqtOqJ:nLueaKR72qKoe/EhdKYavJ

Score

9^/10

evasion persistence ransomware trojan

Malware Config

Signatures

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	explorer.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ybignxkz = "\"C:\\Windows\\idywycih.exe\""	explorer.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 560 set thread context of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 1468 set thread context of 1520	1468	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	29

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\idywycih.exe	explorer.exe
File created	C:\Windows\idywycih.exe	explorer.exe

Interacts with shadow copies 2 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
1184	vssadmin.exe

Modifies Internet Explorer Phishing Filter 1 TTPs 3 IoCs

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\PhishingFilter	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV8 = "0"	explorer.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Internet Explorer\PhishingFilter\EnabledV9 = "0"	explorer.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2020	vssvc.exe
Token: SeRestorePrivilege	2020	vssvc.exe
Token: SeAuditPrivilege	2020	vssvc.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 560 wrote to memory of 1468	560	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	28
PID 1468 wrote to memory of 1520	1468	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	29
PID 1468 wrote to memory of 1520	1468	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	29
PID 1468 wrote to memory of 1520	1468	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	29
PID 1468 wrote to memory of 1520	1468	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	29
PID 1468 wrote to memory of 1520	1468	4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe	29
PID 1520 wrote to memory of 1184	1520	explorer.exe	30
PID 1520 wrote to memory of 1184	1520	explorer.exe	30
PID 1520 wrote to memory of 1184	1520	explorer.exe	30
PID 1520 wrote to memory of 1184	1520	explorer.exe	30

C:\Users\Admin\AppData\Local\Temp\4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe
"C:\Users\Admin\AppData\Local\Temp\4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:560
- C:\Users\Admin\AppData\Local\Temp\4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe
  "C:\Users\Admin\AppData\Local\Temp\4ddcb90086a6e2e9717a35af358fdb9e2cb7a4fdb861dd83b8e1bdff7d14b912.exe"
  2⤵
  - Checks whether UAC is enabled
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1468
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\system32\explorer.exe"
    3⤵
    - Adds Run key to start application
    - Drops file in Windows directory
    - Modifies Internet Explorer Phishing Filter
    - Suspicious use of WriteProcessMemory
    PID:1520
  - - C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      4⤵
      Interacts with shadow copies
      PID:1184

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2020

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File Deletion

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2

T1490

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Downloads

C:\ProgramData\ywynugoxasijikec\01000000

Filesize
554KB

MD5
36f188add4e890121ed9e3efe886f5c4

SHA1
c9325a3394e9ec421f9a9278b23b71de1d3f181d

SHA256
8c5b2bc9dc7e0df60f7a52e6d5022611785d22237636befdfd109e861679cd3d

SHA512
0ecf7ec5fbe807d785dbb8f11e5d1828930f4888006d6157490e34e3e8acef423cfa2d15728d319eb1f9da6fca87ae573f545719796559e4daf82da654d4adc1

Download Submit
memory/560-54-0x0000000076D71000-0x0000000076D73000-memory.dmp

Filesize
8KB

Download
memory/1468-69-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-78-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-62-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-64-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-66-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-68-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-60-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-55-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-58-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-79-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1468-61-0x0000000000400000-0x000000000043A000-memory.dmp

Filesize
232KB

Download
memory/1520-77-0x0000000000080000-0x00000000000BC000-memory.dmp

Filesize
240KB

Download
memory/1520-76-0x0000000075541000-0x0000000075543000-memory.dmp

Filesize
8KB

Download
memory/1520-72-0x0000000000080000-0x00000000000BC000-memory.dmp

Filesize
240KB

Download
memory/1520-81-0x0000000000080000-0x00000000000BC000-memory.dmp

Filesize
240KB

Download
memory/1520-70-0x0000000000080000-0x00000000000BC000-memory.dmp

Filesize
240KB

Download
memory/1520-83-0x0000000072FF1000-0x0000000072FF3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads