Malware Analysis Report

2024-08-06 12:39

Sample ID 240705-b3qy6szalq
Target a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe
SHA256 a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302
Tags
stealerium stealer
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

a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302

Threat Level: Known bad

The file a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe was found to be: Known bad.

Malicious Activity Summary

stealerium stealer

Stealerium

Legitimate hosting services abused for malware hosting/C2

AutoIT Executable

Suspicious use of SetThreadContext

Drops file in Windows directory

Program crash

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: MapViewOfSection

Suspicious use of SendNotifyMessage

Suspicious behavior: EnumeratesProcesses

Delays execution with timeout.exe

Kills process with taskkill

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Web Service
T1102
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-07-05 01:40

Signatures

AutoIT Executable

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-05 01:40

Reported

2024-07-05 06:24

Platform

win7-20240221-en

Max time kernel

117s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe"

Signatures

Stealerium

stealer stealerium

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A discord.com N/A N/A
N/A discord.com N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2408 set thread context of 2360 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Microsoft.NET\Framework\v4.0.30319\ C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2408 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2408 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2408 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2408 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2408 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2408 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2408 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2408 wrote to memory of 2360 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2360 wrote to memory of 2804 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\cmd.exe
PID 2360 wrote to memory of 2804 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\cmd.exe
PID 2360 wrote to memory of 2804 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\cmd.exe
PID 2360 wrote to memory of 2804 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\SysWOW64\cmd.exe
PID 2804 wrote to memory of 2912 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2804 wrote to memory of 2912 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2804 wrote to memory of 2912 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2804 wrote to memory of 2912 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2804 wrote to memory of 2980 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2804 wrote to memory of 2980 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2804 wrote to memory of 2980 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2804 wrote to memory of 2980 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2804 wrote to memory of 2984 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2804 wrote to memory of 2984 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2804 wrote to memory of 2984 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2804 wrote to memory of 2984 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe

"C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

"C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp4C25.tmp.bat

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\taskkill.exe

TaskKill /F /IM 2360

C:\Windows\SysWOW64\timeout.exe

Timeout /T 2 /Nobreak

Network

Country Destination Domain Proto
US 8.8.8.8:53 discord.com udp
US 162.159.138.232:443 discord.com tcp

Files

C:\Users\Admin\AppData\Local\Temp\cerecloths

MD5 3903ada0ac31eadcf07abac457f50210
SHA1 be0a97cc0d5d7fbe85dca85afe57104a6723ea65
SHA256 7c98ea94b70e5c7dbc5018d4a88e6a66ac88bb9fd97a8c0afb2c40af5cf4975b
SHA512 5fc9fd928471de601f0c7e60b83306deaffe39727cd830db6ddf688e6ec27632c9fd1eeb411568c6fd39dac19efd92c065706d1265f0ce2cc78f31394f97a774

memory/2408-11-0x0000000000120000-0x0000000000124000-memory.dmp

memory/2360-12-0x0000000000090000-0x0000000000224000-memory.dmp

memory/2360-18-0x0000000000090000-0x0000000000224000-memory.dmp

memory/2360-14-0x0000000000090000-0x0000000000224000-memory.dmp

memory/2360-22-0x0000000073DCE000-0x0000000073DCF000-memory.dmp

memory/2360-21-0x0000000000090000-0x0000000000224000-memory.dmp

memory/2360-23-0x0000000073DC0000-0x00000000744AE000-memory.dmp

memory/2360-26-0x0000000000EA0000-0x0000000000F32000-memory.dmp

memory/2360-27-0x0000000000BF0000-0x0000000000C16000-memory.dmp

memory/2360-28-0x0000000000B20000-0x0000000000B28000-memory.dmp

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

C:\Users\Admin\AppData\Local\Temp\Tar45BE.tmp

MD5 4ea6026cf93ec6338144661bf1202cd1
SHA1 a1dec9044f750ad887935a01430bf49322fbdcb7
SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
SHA512 6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

C:\Users\Admin\AppData\Local\Temp\tmp4C25.tmp.bat

MD5 4223a1770a8fd1376f49e36b9ec70517
SHA1 e0964fa7ff5d9a361e54f95c286659214d752e31
SHA256 b2d07f7e84217a13983723468efa974d15640b4936c501b95d367516c8fa0e5f
SHA512 85adf38e6b77dee40cc332c7ba8eaa3c01ba498d17c2a86b6ed39e4f70bf32c16e88b32027fc90257222521e9d3bc8b94bcd500c1079c62c37d2652eb35d0f41

memory/2360-70-0x0000000073DC0000-0x00000000744AE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-05 01:40

Reported

2024-07-05 06:23

Platform

win10v2004-20240704-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe"

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 5112 wrote to memory of 3492 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 5112 wrote to memory of 3492 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 5112 wrote to memory of 3492 N/A C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe

"C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

"C:\Users\Admin\AppData\Local\Temp\a4fc6ef06617c607c0b4d532e7df102e1dbe7416b28402e214672cbae1188302.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 5112 -ip 5112

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 5112 -s 728

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

C:\Users\Admin\AppData\Local\Temp\aut9A5B.tmp

MD5 3903ada0ac31eadcf07abac457f50210
SHA1 be0a97cc0d5d7fbe85dca85afe57104a6723ea65
SHA256 7c98ea94b70e5c7dbc5018d4a88e6a66ac88bb9fd97a8c0afb2c40af5cf4975b
SHA512 5fc9fd928471de601f0c7e60b83306deaffe39727cd830db6ddf688e6ec27632c9fd1eeb411568c6fd39dac19efd92c065706d1265f0ce2cc78f31394f97a774

memory/5112-12-0x0000000001980000-0x0000000001984000-memory.dmp