Malware Analysis Report

2024-08-06 13:12

Sample ID 240618-swwphszbjf
Target 935fa2bdf4a8b2b9d71c1e87dfda27ef.exe
SHA256 f7d1b2ecb7f47ed1311ed562bd1565f2e849d26e0c076e6ec6125d535bf17c11
Tags
asyncrat default rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

f7d1b2ecb7f47ed1311ed562bd1565f2e849d26e0c076e6ec6125d535bf17c11

Threat Level: Known bad

The file 935fa2bdf4a8b2b9d71c1e87dfda27ef.exe was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Async RAT payload

Checks computer location settings

Executes dropped EXE

Enumerates physical storage devices

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

Uses Task Scheduler COM API

Delays execution with timeout.exe

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Persistence
TA0003
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Privilege Escalation
TA0004
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
Query Registry
T1012
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-18 15:29

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-18 15:29

Reported

2024-06-18 15:31

Platform

win7-20240508-en

Max time kernel

119s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2400 wrote to memory of 2616 N/A C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe C:\Windows\system32\WerFault.exe
PID 2400 wrote to memory of 2616 N/A C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe C:\Windows\system32\WerFault.exe
PID 2400 wrote to memory of 2616 N/A C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe C:\Windows\system32\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe

"C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe"

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 2400 -s 776

Network

N/A

Files

memory/2400-0-0x000007FEF5BF3000-0x000007FEF5BF4000-memory.dmp

memory/2400-1-0x0000000000B70000-0x0000000000C90000-memory.dmp

memory/2400-2-0x000007FEF5BF0000-0x000007FEF65DC000-memory.dmp

memory/2400-3-0x000007FEF5BF0000-0x000007FEF65DC000-memory.dmp

memory/2400-4-0x000000001BE40000-0x000000001BF0C000-memory.dmp

memory/2400-5-0x000007FEF5BF0000-0x000007FEF65DC000-memory.dmp

memory/2400-6-0x000007FEF5BF0000-0x000007FEF65DC000-memory.dmp

memory/2400-7-0x000007FEF5BF3000-0x000007FEF5BF4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-18 15:29

Reported

2024-06-18 15:31

Platform

win10v2004-20240508-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe"

Signatures

AsyncRat

rat asyncrat

Async RAT payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\lulz.exe N/A

Enumerates physical storage devices

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\lulz.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\lulz.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1416 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe C:\Users\Admin\AppData\Local\Temp\Infected.exe
PID 1416 wrote to memory of 5112 N/A C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe C:\Users\Admin\AppData\Local\Temp\Infected.exe
PID 5112 wrote to memory of 3296 N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe C:\Windows\System32\cmd.exe
PID 5112 wrote to memory of 3296 N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe C:\Windows\System32\cmd.exe
PID 5112 wrote to memory of 4900 N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe C:\Windows\system32\cmd.exe
PID 5112 wrote to memory of 4900 N/A C:\Users\Admin\AppData\Local\Temp\Infected.exe C:\Windows\system32\cmd.exe
PID 3296 wrote to memory of 3328 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 3296 wrote to memory of 3328 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\schtasks.exe
PID 4900 wrote to memory of 3952 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 4900 wrote to memory of 3952 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 4900 wrote to memory of 3384 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Roaming\lulz.exe
PID 4900 wrote to memory of 3384 N/A C:\Windows\system32\cmd.exe C:\Users\Admin\AppData\Roaming\lulz.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe

"C:\Users\Admin\AppData\Local\Temp\935fa2bdf4a8b2b9d71c1e87dfda27ef.exe"

C:\Users\Admin\AppData\Local\Temp\Infected.exe

"C:\Users\Admin\AppData\Local\Temp\Infected.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "lulz" /tr '"C:\Users\Admin\AppData\Roaming\lulz.exe"' & exit

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5AA3.tmp.bat""

C:\Windows\system32\schtasks.exe

schtasks /create /f /sc onlogon /rl highest /tn "lulz" /tr '"C:\Users\Admin\AppData\Roaming\lulz.exe"'

C:\Windows\system32\timeout.exe

timeout 3

C:\Users\Admin\AppData\Roaming\lulz.exe

"C:\Users\Admin\AppData\Roaming\lulz.exe"

Network

Country Destination Domain Proto
N/A 127.0.0.1:7771 tcp
US 8.8.8.8:53 doffuovouvvufoz97964d-39377.portmap.host udp
N/A 127.0.0.1:7771 tcp
N/A 127.0.0.1:7771 tcp
US 8.8.8.8:53 doffuovouvvufoz97964d-39377.portmap.host udp
N/A 127.0.0.1:7771 tcp
US 8.8.8.8:53 doffuovouvvufoz97964d-39377.portmap.host udp
N/A 127.0.0.1:7771 tcp
N/A 127.0.0.1:7771 tcp
N/A 127.0.0.1:7771 tcp
US 8.8.8.8:53 doffuovouvvufoz97964d-39377.portmap.host udp
US 8.8.8.8:53 doffuovouvvufoz97964d-39377.portmap.host udp
US 8.8.8.8:53 doffuovouvvufoz97964d-39377.portmap.host udp
US 8.8.8.8:53 doffuovouvvufoz97964d-39377.portmap.host udp

Files

memory/1416-0-0x00007FFA4C3A3000-0x00007FFA4C3A5000-memory.dmp

memory/1416-1-0x000001A98D740000-0x000001A98D860000-memory.dmp

memory/1416-2-0x00007FFA4C3A0000-0x00007FFA4CE61000-memory.dmp

memory/1416-3-0x00007FFA4C3A0000-0x00007FFA4CE61000-memory.dmp

memory/1416-4-0x000001A9AABF0000-0x000001A9AACBC000-memory.dmp

memory/1416-6-0x00007FFA4C3A0000-0x00007FFA4CE61000-memory.dmp

memory/1416-7-0x00007FFA4C3A0000-0x00007FFA4CE61000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Infected.exe

MD5 b79066a5172f1508c1b9a8d02e9edd29
SHA1 08a74b0096e1df0043246e65bfe5861af4611515
SHA256 66eb0f1ec9845025074d4e91f6a9f5a1a91fca45f9a59bbdb5d718ba84948674
SHA512 033496e0033a0c359efbf2dbf61fa9c41804c26d3271b34b1b320598d9f3e9ea0b3276715eb99f77e50c62f3561f7fb4ad195f5b37c05430b66d0b6cb0489375

memory/5112-18-0x0000000000060000-0x0000000000076000-memory.dmp

memory/5112-19-0x00007FFA4C3A0000-0x00007FFA4CE61000-memory.dmp

memory/5112-20-0x00007FFA4C3A0000-0x00007FFA4CE61000-memory.dmp

memory/5112-25-0x00007FFA4C3A0000-0x00007FFA4CE61000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp5AA3.tmp.bat

MD5 3547ed306326dffc30b03d53b99f3966
SHA1 8de52fe225a836c5dcd19292d01dd693b79390dc
SHA256 3a318284b7978b3af09f140e6ad7a819f76b6a9eea0fceef2525463dc8d799c9
SHA512 d99a291cd4708bc4e7f6200aeff0a141935819628f38249adfa5213ef0ae562f297a702c0ebf7377fb0cc69e52ee1136cb10bec72c08e1470e7bf82aca8dfe9b

memory/1416-30-0x00007FFA4C3A3000-0x00007FFA4C3A5000-memory.dmp

memory/1416-31-0x00007FFA4C3A0000-0x00007FFA4CE61000-memory.dmp