55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461

General

Target

55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exe
Size

302KB
MD5

83ea3ca1878c8b1015e7ac454fdaf71a
SHA1

39bf2b0da74ce2156dc6f9a5ae2db4a3ceefb441
SHA256

55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461
SHA512

0b29ebf361dfdaa95103944ebc98938480814d7862d7c41bc884aac2da48a9f6a079e406d09a90418121ded1f96b7ba661cb5ad73198d5f62e1a28e595067bc5

Score

10^/10

persistence ransomware suricata

Malware Config

Signatures

suricata: ET MALWARE CryptoWall Check-in
suricata: ET MALWARE CryptoWall Check-in
suricata
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490
Drops startup file 1 IoCs

Processes:

explorer.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\8cc03dc2.exe explorer.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\8cc03dc2.exe	explorer.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\8cc03dc = "C:\\8cc03dc2\\8cc03dc2.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*cc03dc = "C:\\8cc03dc2\\8cc03dc2.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\8cc03dc2 = "C:\\Users\\Admin\\AppData\\Roaming\\8cc03dc2.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*cc03dc2 = "C:\\Users\\Admin\\AppData\\Roaming\\8cc03dc2.exe"	explorer.exe

Looks up external IP address via web service 4 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

4 myexternalip.com
6 myexternalip.com
59 myexternalip.com
2 ip-addr.es
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

Processes:

vssadmin.exe

pid process

2004 vssadmin.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exeexplorer.exe

pid process

768 55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exe
740 explorer.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1920 vssvc.exe
Token: SeRestorePrivilege 1920 vssvc.exe
Token: SeAuditPrivilege 1920 vssvc.exe

flow	ioc
4	myexternalip.com
6	myexternalip.com
59	myexternalip.com
2	ip-addr.es

pid	process
2004	vssadmin.exe

pid	process
768	55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exe
740	explorer.exe

description	pid	process
Token: SeBackupPrivilege	1920	vssvc.exe
Token: SeRestorePrivilege	1920	vssvc.exe
Token: SeAuditPrivilege	1920	vssvc.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exeexplorer.exe

description	pid	process	target process
PID 768 wrote to memory of 740	768	55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exe	explorer.exe
PID 768 wrote to memory of 740	768	55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exe	explorer.exe
PID 768 wrote to memory of 740	768	55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exe	explorer.exe
PID 768 wrote to memory of 740	768	55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exe	explorer.exe
PID 740 wrote to memory of 1988	740	explorer.exe	svchost.exe
PID 740 wrote to memory of 1988	740	explorer.exe	svchost.exe
PID 740 wrote to memory of 1988	740	explorer.exe	svchost.exe
PID 740 wrote to memory of 1988	740	explorer.exe	svchost.exe
PID 740 wrote to memory of 2004	740	explorer.exe	vssadmin.exe
PID 740 wrote to memory of 2004	740	explorer.exe	vssadmin.exe
PID 740 wrote to memory of 2004	740	explorer.exe	vssadmin.exe
PID 740 wrote to memory of 2004	740	explorer.exe	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exe
"C:\Users\Admin\AppData\Local\Temp\55faad962e474c35ca96027ac438c8df73d6af4d46d4c32f20b587906c6e3461.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:768

C:\Windows\syswow64\explorer.exe
"C:\Windows\syswow64\explorer.exe"
2⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:740

C:\Windows\syswow64\svchost.exe
-k netsvcs
3⤵
PID:1988

C:\Windows\syswow64\vssadmin.exe
vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:2004

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1920

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

File Deletion

2

T1107

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Inhibit System Recovery

2

T1490

Replay Monitor

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Downloads

memory/740-55-0x0000000000000000-mapping.dmp

Download
memory/740-58-0x0000000075441000-0x0000000075443000-memory.dmp

Filesize
8KB

Download
memory/740-59-0x0000000000080000-0x00000000000A5000-memory.dmp

Filesize
148KB

Download
memory/768-54-0x0000000076AE1000-0x0000000076AE3000-memory.dmp

Filesize
8KB

Download
memory/768-56-0x0000000000400000-0x0000000000467000-memory.dmp

Filesize
412KB

Download
memory/1988-60-0x0000000000000000-mapping.dmp

Download
memory/1988-63-0x0000000000080000-0x00000000000A5000-memory.dmp

Filesize
148KB

Download
memory/1988-64-0x0000000000080000-0x00000000000A5000-memory.dmp

Filesize
148KB

Download
memory/2004-61-0x0000000000000000-mapping.dmp

Download

Analysis

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