b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b

General

Target

b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exe
Size

129KB
MD5

d77fe688327ca995e2fd98e557f67772
SHA1

12f451246e98e18418bbed8df55d847eb2d96222
SHA256

b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b
SHA512

47ccdc9d2375c40b6714d6a0aead86c5678e5dd00c2bb1484e1d7e0786126846a743ed51182d31133e2964bebf16bfa40f312761c1cfc26160e22e27fef26aea
SSDEEP

3072:B7RC+zd/EtzAAJ1rVAgCQXopj4B6SVqCgQfBUnPy8L66iiSM:B7JdEt8ATrdCQ4pj4B6SVqCgQfBUPy8S

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
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\b0cdbf53.exe explorer.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\b0cdbf53.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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*0cdbf5 = "C:\\b0cdbf53\\b0cdbf53.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\b0cdbf53 = "C:\\Users\\Admin\\AppData\\Roaming\\b0cdbf53.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\*0cdbf53 = "C:\\Users\\Admin\\AppData\\Roaming\\b0cdbf53.exe"	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\b0cdbf5 = "C:\\b0cdbf53\\b0cdbf53.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

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

1764 vssadmin.exe
Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exeexplorer.exe

pid process

1720 b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exe
1300 explorer.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1788 vssvc.exe
Token: SeRestorePrivilege 1788 vssvc.exe
Token: SeAuditPrivilege 1788 vssvc.exe

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

pid	process
1764	vssadmin.exe

pid	process
1720	b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exe
1300	explorer.exe

description	pid	process
Token: SeBackupPrivilege	1788	vssvc.exe
Token: SeRestorePrivilege	1788	vssvc.exe
Token: SeAuditPrivilege	1788	vssvc.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exeexplorer.exe

description	pid	process	target process
PID 1720 wrote to memory of 1300	1720	b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exe	explorer.exe
PID 1720 wrote to memory of 1300	1720	b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exe	explorer.exe
PID 1720 wrote to memory of 1300	1720	b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exe	explorer.exe
PID 1720 wrote to memory of 1300	1720	b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exe	explorer.exe
PID 1300 wrote to memory of 112	1300	explorer.exe	svchost.exe
PID 1300 wrote to memory of 112	1300	explorer.exe	svchost.exe
PID 1300 wrote to memory of 112	1300	explorer.exe	svchost.exe
PID 1300 wrote to memory of 112	1300	explorer.exe	svchost.exe
PID 1300 wrote to memory of 1764	1300	explorer.exe	vssadmin.exe
PID 1300 wrote to memory of 1764	1300	explorer.exe	vssadmin.exe
PID 1300 wrote to memory of 1764	1300	explorer.exe	vssadmin.exe
PID 1300 wrote to memory of 1764	1300	explorer.exe	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exe
"C:\Users\Admin\AppData\Local\Temp\b6555a8d62f03786498e06b1f673a3350fd83e374055cd91f3d99bf5873c594b.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1720

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:1300

C:\Windows\syswow64\svchost.exe
-k netsvcs
3⤵
PID:112

C:\Windows\syswow64\vssadmin.exe
vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:1764

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1788

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/112-58-0x0000000000000000-mapping.dmp

Download
memory/112-61-0x00000000000C0000-0x00000000000E5000-memory.dmp

Filesize
148KB

Download
memory/112-62-0x00000000000C0000-0x00000000000E5000-memory.dmp

Filesize
148KB

Download
memory/1300-54-0x0000000000000000-mapping.dmp

Download
memory/1300-55-0x00000000765B1000-0x00000000765B3000-memory.dmp

Filesize
8KB

Download
memory/1300-56-0x0000000074E81000-0x0000000074E83000-memory.dmp

Filesize
8KB

Download
memory/1300-57-0x00000000000C0000-0x00000000000E5000-memory.dmp

Filesize
148KB

Download
memory/1764-59-0x0000000000000000-mapping.dmp

Download

Analysis

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