Malware Analysis Report

2025-08-05 13:23

Sample ID 221120-y67seseg6x
Target c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa
SHA256 c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa
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

c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa

Threat Level: Known bad

The file c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa was found to be: Known bad.

Malicious Activity Summary

nymaim trojan

NyMaim

Executes dropped EXE

Deletes itself

Loads dropped DLL

Checks computer location settings

Enumerates physical storage devices

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-11-20 20:24

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-11-20 20:24

Reported

2022-11-20 20:27

Platform

win7-20220812-en

Max time kernel

55s

Max time network

56s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe"

Signatures

NyMaim

trojan nymaim

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2wJfl.exe N/A

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1440 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2wJfl.exe
PID 1440 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2wJfl.exe
PID 1440 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2wJfl.exe
PID 1440 wrote to memory of 788 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2wJfl.exe
PID 1440 wrote to memory of 1964 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Windows\SysWOW64\cmd.exe
PID 1440 wrote to memory of 1964 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Windows\SysWOW64\cmd.exe
PID 1440 wrote to memory of 1964 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Windows\SysWOW64\cmd.exe
PID 1440 wrote to memory of 1964 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Windows\SysWOW64\cmd.exe
PID 1964 wrote to memory of 536 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1964 wrote to memory of 536 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1964 wrote to memory of 536 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1964 wrote to memory of 536 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe

"C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe"

C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2wJfl.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe" /f

Network

Country Destination Domain Proto
N/A 45.139.105.171:80 45.139.105.171 tcp
N/A 107.182.129.235:80 107.182.129.235 tcp
N/A 171.22.30.106:80 171.22.30.106 tcp

Files

memory/1440-54-0x0000000076181000-0x0000000076183000-memory.dmp

memory/1440-55-0x0000000000400000-0x0000000001532000-memory.dmp

memory/1440-56-0x0000000000400000-0x0000000001532000-memory.dmp

memory/1440-57-0x0000000000400000-0x0000000001532000-memory.dmp

\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2wJfl.exe

MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\2wJfl.exe

MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

memory/788-59-0x0000000000000000-mapping.dmp

memory/1440-61-0x0000000010000000-0x000000001001B000-memory.dmp

memory/1440-65-0x0000000000400000-0x0000000001532000-memory.dmp

memory/1964-66-0x0000000000000000-mapping.dmp

memory/536-67-0x0000000000000000-mapping.dmp

memory/1440-68-0x0000000000400000-0x0000000001532000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-11-20 20:24

Reported

2022-11-20 20:27

Platform

win10v2004-20221111-en

Max time kernel

78s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe"

Signatures

NyMaim

trojan nymaim

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4828 wrote to memory of 60 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe
PID 4828 wrote to memory of 60 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe
PID 4828 wrote to memory of 60 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe
PID 4828 wrote to memory of 4652 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Windows\SysWOW64\cmd.exe
PID 4828 wrote to memory of 4652 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Windows\SysWOW64\cmd.exe
PID 4828 wrote to memory of 4652 N/A C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe C:\Windows\SysWOW64\cmd.exe
PID 4652 wrote to memory of 3528 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4652 wrote to memory of 3528 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4652 wrote to memory of 3528 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe

"C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe"

C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "c02e40f2565478f5c2deb328f78819550dbbcee9b1c233129c22a6414b46cffa.exe" /f

Network

Country Destination Domain Proto
N/A 45.139.105.171:80 45.139.105.171 tcp
N/A 107.182.129.235:80 107.182.129.235 tcp
N/A 171.22.30.106:80 171.22.30.106 tcp
N/A 52.168.117.169:443 tcp
N/A 104.80.225.205:443 tcp
N/A 87.248.202.1:80 tcp
N/A 87.248.202.1:80 tcp
N/A 13.107.4.50:80 tcp

Files

memory/4828-133-0x0000000000400000-0x0000000001532000-memory.dmp

memory/4828-132-0x0000000000400000-0x0000000001532000-memory.dmp

memory/4828-134-0x0000000000400000-0x0000000001532000-memory.dmp

memory/60-135-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe

MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\pBbS5dk4.exe

MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

memory/4828-138-0x0000000010000000-0x000000001001B000-memory.dmp

memory/4828-142-0x0000000000400000-0x0000000001532000-memory.dmp

memory/4652-143-0x0000000000000000-mapping.dmp

memory/3528-144-0x0000000000000000-mapping.dmp

memory/4828-145-0x0000000000400000-0x0000000001532000-memory.dmp