Malware Analysis Report

2025-04-13 10:38

Sample ID 221229-pf2ztada34
Target 8cb2f80304f1f188fb8769e9ba089a1f.exe
SHA256 f3a7d831c9fa8577a6dffae63ca18f8c05274b49a5a0f3a6091165fe1a212d85
Tags
nymaim trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

f3a7d831c9fa8577a6dffae63ca18f8c05274b49a5a0f3a6091165fe1a212d85

Threat Level: Known bad

The file 8cb2f80304f1f188fb8769e9ba089a1f.exe was found to be: Known bad.

Malicious Activity Summary

nymaim trojan

NyMaim

Checks computer location settings

Deletes itself

Program crash

Enumerates physical storage devices

Kills process with taskkill

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-12-29 12:17

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-12-29 12:17

Reported

2022-12-29 12:19

Platform

win7-20220812-en

Max time kernel

43s

Max time network

45s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe"

Signatures

NyMaim

trojan nymaim

Deletes itself

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

Enumerates physical storage devices

Kills process with taskkill

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

Suspicious use of AdjustPrivilegeToken

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

Processes

C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe

"C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "8cb2f80304f1f188fb8769e9ba089a1f.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "8cb2f80304f1f188fb8769e9ba089a1f.exe" /f

Network

N/A

Files

memory/1808-54-0x0000000076171000-0x0000000076173000-memory.dmp

memory/1996-55-0x0000000000000000-mapping.dmp

memory/1808-56-0x000000000064B000-0x0000000000672000-memory.dmp

memory/1808-57-0x0000000000220000-0x0000000000260000-memory.dmp

memory/1808-58-0x0000000000400000-0x0000000000473000-memory.dmp

memory/1780-59-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-12-29 12:17

Reported

2022-12-29 12:19

Platform

win10v2004-20221111-en

Max time kernel

90s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe"

Signatures

NyMaim

trojan nymaim

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe N/A

Enumerates physical storage devices

Kills process with taskkill

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

Suspicious use of AdjustPrivilegeToken

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

Processes

C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe

"C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 528 -ip 528

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 684

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 528 -ip 528

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 736

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 528 -ip 528

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 916

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 528 -ip 528

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 916

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 528 -ip 528

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 792

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 528 -ip 528

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 972

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "8cb2f80304f1f188fb8769e9ba089a1f.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\8cb2f80304f1f188fb8769e9ba089a1f.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 528 -ip 528

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "8cb2f80304f1f188fb8769e9ba089a1f.exe" /f

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 528 -s 1156

Network

Country Destination Domain Proto
N/A 104.80.225.205:443 tcp
N/A 52.168.117.170:443 tcp
N/A 8.238.21.126:80 tcp
N/A 8.238.21.126:80 tcp

Files

memory/528-132-0x00000000006D8000-0x00000000006FF000-memory.dmp

memory/528-133-0x0000000000610000-0x0000000000650000-memory.dmp

memory/528-134-0x0000000000400000-0x0000000000473000-memory.dmp

memory/4360-135-0x0000000000000000-mapping.dmp

memory/3588-136-0x0000000000000000-mapping.dmp

memory/528-137-0x00000000006D8000-0x00000000006FF000-memory.dmp

memory/528-138-0x0000000000610000-0x0000000000650000-memory.dmp

memory/528-139-0x0000000000400000-0x0000000000473000-memory.dmp