Malware Analysis Report

2025-04-13 10:39

Sample ID 221228-3rns8abh99
Target c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551
SHA256 a665bf4ccc07a580616e0711253d11027d3d4815ad7e90b9eb2b5e95063c73c7
Tags
nymaim discovery 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

a665bf4ccc07a580616e0711253d11027d3d4815ad7e90b9eb2b5e95063c73c7

Threat Level: Known bad

The file c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551 was found to be: Known bad.

Malicious Activity Summary

nymaim discovery trojan

NyMaim

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Checks installed software on the system

Drops file in Program Files directory

Enumerates physical storage devices

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-12-28 23:45

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-12-28 23:45

Reported

2022-12-28 23:47

Platform

win7-20220812-en

Max time kernel

64s

Max time network

68s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe"

Signatures

NyMaim

trojan nymaim

Checks installed software on the system

discovery

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\Split Files\unins000.dat C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\is-4HTCC.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-VPALU.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-GADD2.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\is-MHL59.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\is-G28G8.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-FMHBU.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-AE15S.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-6FPVO.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\is-E5NSO.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-U1IDI.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-UHTBO.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\is-0C9DV.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-RM80V.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-QVPTQ.tmp C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
File opened for modification C:\Program Files (x86)\Split Files\unins000.dat C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp 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 behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe N/A
N/A N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe N/A
N/A N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1904 wrote to memory of 1220 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp
PID 1904 wrote to memory of 1220 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp
PID 1904 wrote to memory of 1220 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp
PID 1904 wrote to memory of 1220 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp
PID 1904 wrote to memory of 1220 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp
PID 1904 wrote to memory of 1220 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp
PID 1904 wrote to memory of 1220 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp
PID 1220 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1220 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1220 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1220 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1220 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1220 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1220 wrote to memory of 1124 N/A C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1124 wrote to memory of 1668 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe
PID 1124 wrote to memory of 1668 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe
PID 1124 wrote to memory of 1668 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe
PID 1124 wrote to memory of 1668 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe
PID 1124 wrote to memory of 1668 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe
PID 1124 wrote to memory of 1668 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe
PID 1124 wrote to memory of 1668 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe
PID 1124 wrote to memory of 1324 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1124 wrote to memory of 1324 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1124 wrote to memory of 1324 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1124 wrote to memory of 1324 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1124 wrote to memory of 1324 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1124 wrote to memory of 1324 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1124 wrote to memory of 1324 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1324 wrote to memory of 1416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1324 wrote to memory of 1416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1324 wrote to memory of 1416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1324 wrote to memory of 1416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1324 wrote to memory of 1416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1324 wrote to memory of 1416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 1324 wrote to memory of 1416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe

"C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe"

C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp

"C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp" /SL4 $60120 "C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe" 1794182 217600

C:\Program Files (x86)\Split Files\SplitFiles123.exe

"C:\Program Files (x86)\Split Files\SplitFiles123.exe"

C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles123.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles123.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "SplitFiles123.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/1904-54-0x0000000075351000-0x0000000075353000-memory.dmp

memory/1904-55-0x0000000000400000-0x000000000043B000-memory.dmp

\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp

MD5 4f3db9263ab998737f14cfb0cc7da686
SHA1 1f3947a6b5c900f28a93abb7a097aea5efa76f58
SHA256 f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa
SHA512 60d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d

memory/1220-58-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp

MD5 4f3db9263ab998737f14cfb0cc7da686
SHA1 1f3947a6b5c900f28a93abb7a097aea5efa76f58
SHA256 f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa
SHA512 60d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d

C:\Users\Admin\AppData\Local\Temp\is-HJMEQ.tmp\is-MS0L6.tmp

MD5 4f3db9263ab998737f14cfb0cc7da686
SHA1 1f3947a6b5c900f28a93abb7a097aea5efa76f58
SHA256 f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa
SHA512 60d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d

\Users\Admin\AppData\Local\Temp\is-ROSHE.tmp\_isetup\_shfoldr.dll

MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

\Users\Admin\AppData\Local\Temp\is-ROSHE.tmp\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

\Users\Admin\AppData\Local\Temp\is-ROSHE.tmp\_isetup\_shfoldr.dll

MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

memory/1904-65-0x0000000000400000-0x000000000043B000-memory.dmp

\Program Files (x86)\Split Files\SplitFiles123.exe

MD5 d0f0f4163552b63aed54081a28adf050
SHA1 fd67d697f41e714bc8ebec7364d78a012106242a
SHA256 da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40
SHA512 6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

C:\Program Files (x86)\Split Files\SplitFiles123.exe

MD5 d0f0f4163552b63aed54081a28adf050
SHA1 fd67d697f41e714bc8ebec7364d78a012106242a
SHA256 da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40
SHA512 6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

memory/1124-67-0x0000000000000000-mapping.dmp

\Program Files (x86)\Split Files\SplitFiles123.exe

MD5 d0f0f4163552b63aed54081a28adf050
SHA1 fd67d697f41e714bc8ebec7364d78a012106242a
SHA256 da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40
SHA512 6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

\Program Files (x86)\Split Files\SplitFiles123.exe

MD5 d0f0f4163552b63aed54081a28adf050
SHA1 fd67d697f41e714bc8ebec7364d78a012106242a
SHA256 da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40
SHA512 6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

C:\Program Files (x86)\Split Files\SplitFiles123.exe

MD5 d0f0f4163552b63aed54081a28adf050
SHA1 fd67d697f41e714bc8ebec7364d78a012106242a
SHA256 da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40
SHA512 6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

memory/1220-73-0x0000000003990000-0x0000000004AC8000-memory.dmp

memory/1124-74-0x0000000000400000-0x0000000001538000-memory.dmp

memory/1124-75-0x0000000001BA0000-0x0000000002CD8000-memory.dmp

memory/1124-76-0x0000000001BA0000-0x0000000002CD8000-memory.dmp

memory/1124-77-0x0000000000400000-0x0000000001538000-memory.dmp

memory/1124-78-0x0000000000400000-0x0000000001538000-memory.dmp

memory/1668-80-0x0000000000000000-mapping.dmp

\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

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

C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

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

\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

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

C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

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

\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\jNw55X.exe

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

memory/1124-86-0x0000000000400000-0x0000000001538000-memory.dmp

memory/1124-87-0x0000000010000000-0x000000001001B000-memory.dmp

memory/1124-91-0x0000000000400000-0x0000000001538000-memory.dmp

memory/1324-92-0x0000000000000000-mapping.dmp

memory/1416-94-0x0000000000000000-mapping.dmp

memory/1124-96-0x0000000000400000-0x0000000001538000-memory.dmp

memory/1904-97-0x0000000000400000-0x000000000043B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-12-28 23:45

Reported

2022-12-28 23:47

Platform

win10v2004-20220812-en

Max time kernel

70s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe"

Signatures

NyMaim

trojan nymaim

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation C:\Program Files (x86)\Split Files\SplitFiles123.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A

Checks installed software on the system

discovery

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\Split Files\language\is-MHG7T.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\is-1J8IE.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\is-5MIHE.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\is-RVUUT.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\unins000.dat C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-PHS02.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-U23RD.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-TSSDG.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-M9MCL.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File opened for modification C:\Program Files (x86)\Split Files\unins000.dat C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\is-K7LBI.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-DL5SH.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-4PB41.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-J18IE.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-I0G25.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp N/A
File created C:\Program Files (x86)\Split Files\is-59LQL.tmp C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp 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 4556 wrote to memory of 4360 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp
PID 4556 wrote to memory of 4360 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp
PID 4556 wrote to memory of 4360 N/A C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp
PID 4360 wrote to memory of 4204 N/A C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 4360 wrote to memory of 4204 N/A C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 4360 wrote to memory of 4204 N/A C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 4204 wrote to memory of 1340 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\2mULbF8.exe
PID 4204 wrote to memory of 1340 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\2mULbF8.exe
PID 4204 wrote to memory of 1340 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\2mULbF8.exe
PID 4204 wrote to memory of 3740 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 4204 wrote to memory of 3740 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 4204 wrote to memory of 3740 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 3740 wrote to memory of 2800 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 3740 wrote to memory of 2800 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 3740 wrote to memory of 2800 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe

Processes

C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe

"C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe"

C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp

"C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp" /SL4 $A004C "C:\Users\Admin\AppData\Local\Temp\c8858635f543ff33064fb6732e1ca79a99c226a46d48cc987673059cf0ea0551.exe" 1794182 217600

C:\Program Files (x86)\Split Files\SplitFiles123.exe

"C:\Program Files (x86)\Split Files\SplitFiles123.exe"

C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\2mULbF8.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles123.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles123.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "SplitFiles123.exe" /f

Network

Country Destination Domain Proto
N/A 93.184.220.29:80 tcp
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 13.89.179.8:443 tcp
N/A 8.238.20.126:80 tcp

Files

memory/4556-132-0x0000000000400000-0x000000000043B000-memory.dmp

memory/4556-134-0x0000000000400000-0x000000000043B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp

MD5 4f3db9263ab998737f14cfb0cc7da686
SHA1 1f3947a6b5c900f28a93abb7a097aea5efa76f58
SHA256 f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa
SHA512 60d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d

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

C:\Users\Admin\AppData\Local\Temp\is-2QJR1.tmp\is-P5UI2.tmp

MD5 4f3db9263ab998737f14cfb0cc7da686
SHA1 1f3947a6b5c900f28a93abb7a097aea5efa76f58
SHA256 f8ce6681396db8b8a95cdf7dbf02b68c847922aeacd0277a52a4e5ca399f87aa
SHA512 60d5207b7af2dadf63aeb6123ed466e779cc9b04ca15f303416b348b8e5ee9c147ee578d5e586df749d1facf460c84090436a0d4944fdebd334373f0f6c18f8d

C:\Users\Admin\AppData\Local\Temp\is-QGKH1.tmp\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

C:\Program Files (x86)\Split Files\SplitFiles123.exe

MD5 d0f0f4163552b63aed54081a28adf050
SHA1 fd67d697f41e714bc8ebec7364d78a012106242a
SHA256 da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40
SHA512 6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

memory/4204-139-0x0000000000000000-mapping.dmp

C:\Program Files (x86)\Split Files\SplitFiles123.exe

MD5 d0f0f4163552b63aed54081a28adf050
SHA1 fd67d697f41e714bc8ebec7364d78a012106242a
SHA256 da6e6ed6476e3e0a0528ccb94a0992eb3174a251fe68f21d17ecfe6fd0263c40
SHA512 6016e806cbbb62d4eca5b1103c8a3ec1d27ce87e4377f30d1087c6d0367c1d9ca90b5ad4ab11cb0f79a550825fb90e3fa19f24b3af2f6f6802bb4da38f3f579b

memory/4204-143-0x0000000000400000-0x0000000001538000-memory.dmp

memory/4204-142-0x0000000000400000-0x0000000001538000-memory.dmp

memory/4204-144-0x0000000000400000-0x0000000001538000-memory.dmp

memory/1340-145-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\2mULbF8.exe

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

C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\2mULbF8.exe

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

memory/4204-148-0x0000000010000000-0x000000001001B000-memory.dmp

memory/4204-152-0x0000000000400000-0x0000000001538000-memory.dmp

memory/3740-153-0x0000000000000000-mapping.dmp

memory/2800-154-0x0000000000000000-mapping.dmp

memory/4204-155-0x0000000000400000-0x0000000001538000-memory.dmp

memory/4556-156-0x0000000000400000-0x000000000043B000-memory.dmp