f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208

General

Target

f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe
Size

469KB
MD5

362479f2bf81adb0231c5d608ddae80d
SHA1

efc926d62a7350349a62d85bb45d206054497be7
SHA256

f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208
SHA512

df5f14976ba3fb0d40ed8cfdc96f0b9f0520f1138f9143f12af275607f16b4b42e51108aff01fad234615fdf949c1c548b2813e39e4cc06634ee68e9eb8a7b5d
SSDEEP

6144:bi0LrqaFy7EZK2P1QTcyPa8v1v36WuRty0B/pBcbrWu:b3v3I78DMVB6VxhSPWu

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yprparun = "C:\\Windows\\evynixyf.exe"	explorer.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	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	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1604 set thread context of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 996 set thread context of 1724	996	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	29

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\evynixyf.exe	explorer.exe
File created	C:\Windows\evynixyf.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
1944	vssadmin.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	268	vssvc.exe
Token: SeRestorePrivilege	268	vssvc.exe
Token: SeAuditPrivilege	268	vssvc.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 1604 wrote to memory of 996	1604	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	28
PID 996 wrote to memory of 1724	996	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	29
PID 996 wrote to memory of 1724	996	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	29
PID 996 wrote to memory of 1724	996	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	29
PID 996 wrote to memory of 1724	996	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	29
PID 996 wrote to memory of 1724	996	f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe	29
PID 1724 wrote to memory of 1944	1724	explorer.exe	30
PID 1724 wrote to memory of 1944	1724	explorer.exe	30
PID 1724 wrote to memory of 1944	1724	explorer.exe	30
PID 1724 wrote to memory of 1944	1724	explorer.exe	30

C:\Users\Admin\AppData\Local\Temp\f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe
"C:\Users\Admin\AppData\Local\Temp\f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1604
- C:\Users\Admin\AppData\Local\Temp\f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe
  "C:\Users\Admin\AppData\Local\Temp\f3611eb6f213a168855a0d8cfd0711920b3c643e054b6b0c9779bdd229412208.exe"
  2⤵
  - Checks whether UAC is enabled
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:996
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\system32\explorer.exe"
    3⤵
    - Adds Run key to start application
    - Drops file in Windows directory
    - Suspicious use of WriteProcessMemory
    PID:1724
  - - C:\Windows\SysWOW64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      4⤵
      Interacts with shadow copies
      PID:1944

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:268

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

Replay Monitor

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Downloads

C:\ProgramData\exasugosujahikov\01000000

Filesize
469KB

MD5
ecb344be61a94f203c51dc86a4cf673b

SHA1
53d9f879889693e4f2d182a5e047d25be8444716

SHA256
3bd865c71516ba04f6e583cf8e8aa35911a083e4ff39a0f769f78c156d5893d3

SHA512
ca2cc0120706c9264e2dede65c77720374b06ff9e037a97ec15baeaf85b6e9f930f8a6370108e91b16c79245be105597fd7817c3fd706230b1b8f8742cbb9bfc

Download Submit
memory/996-66-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/996-60-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/996-68-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/996-55-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/996-62-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/996-65-0x000000000040A7BE-mapping.dmp

Download
memory/996-64-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/996-77-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/996-61-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/996-58-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1604-54-0x0000000076DC1000-0x0000000076DC3000-memory.dmp

Filesize
8KB

Download
memory/1724-80-0x00000000000D0000-0x000000000010B000-memory.dmp

Filesize
236KB

Download
memory/1724-73-0x00000000000E9C80-mapping.dmp

Download
memory/1724-75-0x0000000075591000-0x0000000075593000-memory.dmp

Filesize
8KB

Download
memory/1724-71-0x00000000000D0000-0x000000000010B000-memory.dmp

Filesize
236KB

Download
memory/1724-79-0x0000000073041000-0x0000000073043000-memory.dmp

Filesize
8KB

Download
memory/1724-69-0x00000000000D0000-0x000000000010B000-memory.dmp

Filesize
236KB

Download
memory/1944-78-0x0000000000000000-mapping.dmp

Download

Analysis

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