Malware Analysis Report

2025-04-13 10:39

Sample ID 221229-pdqtrsgb31
Target 4f8aaa32c25c0df6e6d6b07147fe2210.exe
SHA256 3130ae5c7eb9359f37503eae4d9e163031db1cf5cf39b1cf353fefda5e037ed8
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

3130ae5c7eb9359f37503eae4d9e163031db1cf5cf39b1cf353fefda5e037ed8

Threat Level: Known bad

The file 4f8aaa32c25c0df6e6d6b07147fe2210.exe was found to be: Known bad.

Malicious Activity Summary

nymaim trojan

NyMaim

Deletes itself

Checks computer location settings

Enumerates physical storage devices

Program crash

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-12-29 12:13

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-12-29 12:13

Reported

2022-12-29 12:15

Platform

win7-20221111-en

Max time kernel

28s

Max time network

31s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.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\4f8aaa32c25c0df6e6d6b07147fe2210.exe

"C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "4f8aaa32c25c0df6e6d6b07147fe2210.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "4f8aaa32c25c0df6e6d6b07147fe2210.exe" /f

Network

Country Destination Domain Proto
N/A 45.139.105.171:80 45.139.105.171 tcp

Files

memory/1784-54-0x00000000767F1000-0x00000000767F3000-memory.dmp

memory/1784-55-0x000000000055A000-0x0000000000580000-memory.dmp

memory/1784-56-0x0000000000220000-0x0000000000260000-memory.dmp

memory/1784-57-0x0000000000400000-0x0000000000468000-memory.dmp

memory/592-58-0x0000000000000000-mapping.dmp

memory/1784-59-0x0000000000400000-0x0000000000468000-memory.dmp

memory/608-60-0x0000000000000000-mapping.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-12-29 12:13

Reported

2022-12-29 12:15

Platform

win10v2004-20220901-en

Max time kernel

90s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe"

Signatures

NyMaim

trojan nymaim

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.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\4f8aaa32c25c0df6e6d6b07147fe2210.exe

"C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3912 -ip 3912

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 452

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 3912 -ip 3912

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 772

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3912 -ip 3912

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 784

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3912 -ip 3912

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 772

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3912 -ip 3912

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 836

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 3912 -ip 3912

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 928

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 3912 -ip 3912

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 1008

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 3912 -ip 3912

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 1360

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "4f8aaa32c25c0df6e6d6b07147fe2210.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\4f8aaa32c25c0df6e6d6b07147fe2210.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 3912 -ip 3912

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3912 -s 1396

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "4f8aaa32c25c0df6e6d6b07147fe2210.exe" /f

Network

Country Destination Domain Proto
N/A 45.139.105.171:80 45.139.105.171 tcp
N/A 20.42.65.84:443 tcp
N/A 93.184.221.240:80 tcp
N/A 93.184.221.240:80 tcp
N/A 93.184.221.240:80 tcp
N/A 93.184.221.240:80 tcp
N/A 104.80.229.204:443 tcp

Files

memory/3912-132-0x00000000004C7000-0x00000000004EE000-memory.dmp

memory/3912-133-0x00000000008D0000-0x0000000000910000-memory.dmp

memory/3912-134-0x0000000000400000-0x0000000000468000-memory.dmp

memory/4216-135-0x0000000000000000-mapping.dmp

memory/4740-136-0x0000000000000000-mapping.dmp

memory/3912-137-0x00000000004C7000-0x00000000004EE000-memory.dmp

memory/3912-138-0x0000000000400000-0x0000000000468000-memory.dmp