60d574055ae164cc32df9e5c9402deefa9d07e5034328d7b41457d35b7312a0e

General

Target

cryptowall.exe
Size

240KB
MD5

47363b94cee907e2b8926c1be61150c7
SHA1

ca963033b9a285b8cd0044df38146a932c838071
SHA256

45317968759d3e37282ceb75149f627d648534c5b4685f6da3966d8f6fca662d
SHA512

93dfaafc183360829448887a112dd49c90ec5fe50dcd7c7bbc06c1c8daa206eeea5577f726d906446322c731d0520e93700d5ff9cefd730fba347c72b7325068
SSDEEP

3072:xkeyloECBch6ZCGBGSmHJ0y5lj6jdojK7+MGOXpXx8z3Lp7Yoq:xGlnCIwMpj6ijKfxx8z3F0V

Score

9^/10

persistence ransomware

Malware Config

Signatures

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

File Deletion
T1070.004

Inhibit System Recovery
T1490

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5e55d717.exe	explorer.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2084844033-2744876406-2053742436-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*e55d717 = "C:\\Users\\Admin\\AppData\\Roaming\\5e55d717.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2084844033-2744876406-2053742436-1000\Software\Microsoft\Windows\CurrentVersion\Run\5e55d71 = "C:\\5e55d717\\5e55d717.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2084844033-2744876406-2053742436-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*e55d71 = "C:\\5e55d717\\5e55d717.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2084844033-2744876406-2053742436-1000\Software\Microsoft\Windows\CurrentVersion\Run\5e55d717 = "C:\\Users\\Admin\\AppData\\Roaming\\5e55d717.exe"	explorer.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	ip-addr.es
5	myexternalip.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1740 set thread context of 2276	1740	cryptowall.exe	27

Interacts with shadow copies 2 TTPs 1 IoCs

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

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
1684	vssadmin.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1740	cryptowall.exe
1740	cryptowall.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2276	cryptowall.exe
2664	explorer.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: 33	1740	cryptowall.exe
Token: SeIncBasePriorityPrivilege	1740	cryptowall.exe
Token: SeBackupPrivilege	3068	vssvc.exe
Token: SeRestorePrivilege	3068	vssvc.exe
Token: SeAuditPrivilege	3068	vssvc.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 1740 wrote to memory of 2276	1740	cryptowall.exe	27
PID 2276 wrote to memory of 2664	2276	cryptowall.exe	28
PID 2276 wrote to memory of 2664	2276	cryptowall.exe	28
PID 2276 wrote to memory of 2664	2276	cryptowall.exe	28
PID 2276 wrote to memory of 2664	2276	cryptowall.exe	28
PID 2664 wrote to memory of 1500	2664	explorer.exe	29
PID 2664 wrote to memory of 1500	2664	explorer.exe	29
PID 2664 wrote to memory of 1500	2664	explorer.exe	29
PID 2664 wrote to memory of 1500	2664	explorer.exe	29
PID 2664 wrote to memory of 1684	2664	explorer.exe	30
PID 2664 wrote to memory of 1684	2664	explorer.exe	30
PID 2664 wrote to memory of 1684	2664	explorer.exe	30
PID 2664 wrote to memory of 1684	2664	explorer.exe	30

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\cryptowall.exe
"C:\Users\Admin\AppData\Local\Temp\cryptowall.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Users\Admin\AppData\Local\Temp\cryptowall.exe
  "C:\Users\Admin\AppData\Local\Temp\cryptowall.exe"
  2⤵
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2276
- - C:\Windows\syswow64\explorer.exe
    "C:\Windows\syswow64\explorer.exe"
    3⤵
    - Drops startup file
    - Adds Run key to start application
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2664
  - - C:\Windows\syswow64\svchost.exe
      -k netsvcs
      4⤵
      PID:1500
  - - C:\Windows\syswow64\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      4⤵
      Interacts with shadow copies
      PID:1684

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3068

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Indicator Removal

2

T1070

File Deletion

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2

T1490

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1500-24-0x0000000000080000-0x00000000000A5000-memory.dmp

Filesize
148KB

Download
memory/1740-0-0x0000000000240000-0x0000000000256000-memory.dmp

Filesize
88KB

Download
memory/2276-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2276-5-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2276-7-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2276-9-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2276-3-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2276-13-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2276-14-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2276-16-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2276-1-0x0000000000400000-0x0000000000425000-memory.dmp

Filesize
148KB

Download
memory/2664-15-0x0000000000080000-0x00000000000A5000-memory.dmp

Filesize
148KB

Download
memory/2664-18-0x0000000000080000-0x00000000000A5000-memory.dmp

Filesize
148KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads