Malware Analysis Report

2025-04-13 10:39

Sample ID 221229-a88kqsca93
Target file.exe
SHA256 929cc3fad89061f918ed1eef3efa1d61679223b0e1af0514ebff9fd6c713bc99
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

929cc3fad89061f918ed1eef3efa1d61679223b0e1af0514ebff9fd6c713bc99

Threat Level: Known bad

The file file.exe 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 behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-12-29 00:54

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-12-29 00:54

Reported

2022-12-29 00:56

Platform

win7-20221111-en

Max time kernel

55s

Max time network

57s

Command Line

"C:\Users\Admin\AppData\Local\Temp\file.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\language\is-QBL0D.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-MI7FO.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-QKJHN.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-LGRSF.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\is-S9IAI.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\is-8UAA6.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\is-0CSO2.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-PM0T6.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-BTBJI.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-DAPO7.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\is-J5H6M.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\unins000.dat C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-NOPRM.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File opened for modification C:\Program Files (x86)\Split Files\unins000.dat C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\is-2NOB2.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-AGCO6.tmp C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.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-07C94.tmp\is-914LO.tmp N/A
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1292 wrote to memory of 1096 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp
PID 1292 wrote to memory of 1096 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp
PID 1292 wrote to memory of 1096 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp
PID 1292 wrote to memory of 1096 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp
PID 1292 wrote to memory of 1096 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp
PID 1292 wrote to memory of 1096 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp
PID 1292 wrote to memory of 1096 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp
PID 1096 wrote to memory of 1164 N/A C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1096 wrote to memory of 1164 N/A C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1096 wrote to memory of 1164 N/A C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1096 wrote to memory of 1164 N/A C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1096 wrote to memory of 1164 N/A C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1096 wrote to memory of 1164 N/A C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1096 wrote to memory of 1164 N/A C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1164 wrote to memory of 980 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\dVfay.exe
PID 1164 wrote to memory of 980 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\dVfay.exe
PID 1164 wrote to memory of 980 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\dVfay.exe
PID 1164 wrote to memory of 980 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\dVfay.exe
PID 1164 wrote to memory of 980 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\dVfay.exe
PID 1164 wrote to memory of 980 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\dVfay.exe
PID 1164 wrote to memory of 980 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\dVfay.exe
PID 1164 wrote to memory of 808 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1164 wrote to memory of 808 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1164 wrote to memory of 808 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1164 wrote to memory of 808 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1164 wrote to memory of 808 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1164 wrote to memory of 808 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 1164 wrote to memory of 808 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 808 wrote to memory of 1348 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 808 wrote to memory of 1348 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 808 wrote to memory of 1348 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 808 wrote to memory of 1348 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 808 wrote to memory of 1348 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 808 wrote to memory of 1348 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 808 wrote to memory of 1348 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe

Processes

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

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

C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp

"C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp" /SL4 $70126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1537937 96768

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}\dVfay.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/1292-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

memory/1292-55-0x0000000000400000-0x000000000041E000-memory.dmp

\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp

MD5 807603f3a565337ee2ac3e819b25ee58
SHA1 5cc4e6c82fbdda6697a1117561f23731d51baacd
SHA256 682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423
SHA512 252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

memory/1096-58-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp

MD5 807603f3a565337ee2ac3e819b25ee58
SHA1 5cc4e6c82fbdda6697a1117561f23731d51baacd
SHA256 682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423
SHA512 252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

C:\Users\Admin\AppData\Local\Temp\is-07C94.tmp\is-914LO.tmp

MD5 807603f3a565337ee2ac3e819b25ee58
SHA1 5cc4e6c82fbdda6697a1117561f23731d51baacd
SHA256 682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423
SHA512 252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

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

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

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

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

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

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

MD5 2c4eb645fa6e9d780e5877cee6184b41
SHA1 664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53
SHA256 78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0
SHA512 5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

memory/1164-66-0x0000000000000000-mapping.dmp

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

MD5 2c4eb645fa6e9d780e5877cee6184b41
SHA1 664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53
SHA256 78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0
SHA512 5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

memory/1292-69-0x0000000000400000-0x000000000041E000-memory.dmp

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

MD5 2c4eb645fa6e9d780e5877cee6184b41
SHA1 664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53
SHA256 78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0
SHA512 5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

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

MD5 2c4eb645fa6e9d780e5877cee6184b41
SHA1 664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53
SHA256 78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0
SHA512 5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

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

MD5 2c4eb645fa6e9d780e5877cee6184b41
SHA1 664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53
SHA256 78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0
SHA512 5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

memory/1096-70-0x0000000003980000-0x0000000004A9A000-memory.dmp

memory/1164-74-0x0000000000400000-0x000000000151A000-memory.dmp

memory/1164-75-0x0000000001D10000-0x0000000002E2A000-memory.dmp

memory/1164-76-0x0000000001D10000-0x0000000002E2A000-memory.dmp

memory/1164-77-0x0000000000400000-0x000000000151A000-memory.dmp

memory/1164-78-0x0000000000400000-0x000000000151A000-memory.dmp

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

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

memory/980-80-0x0000000000000000-mapping.dmp

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

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

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

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

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

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

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

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

memory/1164-86-0x0000000000400000-0x000000000151A000-memory.dmp

memory/1164-87-0x0000000010000000-0x000000001001B000-memory.dmp

memory/1096-91-0x0000000003980000-0x0000000004A9A000-memory.dmp

memory/1164-92-0x0000000001D10000-0x0000000002E2A000-memory.dmp

memory/1164-93-0x0000000001D10000-0x0000000002E2A000-memory.dmp

memory/1164-94-0x0000000000400000-0x000000000151A000-memory.dmp

memory/808-95-0x0000000000000000-mapping.dmp

memory/1348-97-0x0000000000000000-mapping.dmp

memory/1164-99-0x0000000000400000-0x000000000151A000-memory.dmp

memory/1292-100-0x0000000000400000-0x000000000041E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-12-29 00:54

Reported

2022-12-29 00:56

Platform

win10v2004-20221111-en

Max time kernel

94s

Max time network

152s

Command Line

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

Signatures

NyMaim

trojan nymaim

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\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-D8A4H.tmp\is-7CN25.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-M1D5B.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-QDERN.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\is-65KCR.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File opened for modification C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-UACIA.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-309TE.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-JNQGI.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-40NU6.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-US1VP.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-25CH9.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\is-FQVR3.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\is-R417B.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\unins000.dat C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\is-B7N3N.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\language\is-F51TH.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File created C:\Program Files (x86)\Split Files\is-BCLHQ.tmp C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp N/A
File opened for modification C:\Program Files (x86)\Split Files\unins000.dat C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.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 4928 wrote to memory of 1072 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp
PID 4928 wrote to memory of 1072 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp
PID 4928 wrote to memory of 1072 N/A C:\Users\Admin\AppData\Local\Temp\file.exe C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp
PID 1072 wrote to memory of 4756 N/A C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1072 wrote to memory of 4756 N/A C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 1072 wrote to memory of 4756 N/A C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp C:\Program Files (x86)\Split Files\SplitFiles123.exe
PID 4756 wrote to memory of 972 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\E0Eed6piSGpN.exe
PID 4756 wrote to memory of 972 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\E0Eed6piSGpN.exe
PID 4756 wrote to memory of 972 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\E0Eed6piSGpN.exe
PID 4756 wrote to memory of 4000 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 4756 wrote to memory of 4000 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 4756 wrote to memory of 4000 N/A C:\Program Files (x86)\Split Files\SplitFiles123.exe C:\Windows\SysWOW64\cmd.exe
PID 4000 wrote to memory of 4856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4000 wrote to memory of 4856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4000 wrote to memory of 4856 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe

Processes

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

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

C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp

"C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp" /SL4 $80060 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1537937 96768

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

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

C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\E0Eed6piSGpN.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
N/A 20.189.173.4:443 tcp
N/A 96.16.53.137:80 tcp
N/A 67.27.154.126:80 tcp
N/A 104.80.225.205:443 tcp

Files

memory/4928-132-0x0000000000400000-0x000000000041E000-memory.dmp

memory/1072-134-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp

MD5 807603f3a565337ee2ac3e819b25ee58
SHA1 5cc4e6c82fbdda6697a1117561f23731d51baacd
SHA256 682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423
SHA512 252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

C:\Users\Admin\AppData\Local\Temp\is-D8A4H.tmp\is-7CN25.tmp

MD5 807603f3a565337ee2ac3e819b25ee58
SHA1 5cc4e6c82fbdda6697a1117561f23731d51baacd
SHA256 682dd0a4ea6b0d763a1adb14def8657518a4879e454c7ece43505910dd448423
SHA512 252831b5fe5869c0abd25f246fe161e5b8218e9c54231fa9c5c78d5ffe6ff0c8e3d1f9ea3316f74b47ce372f1f8f06edd8e147711633f4028acd0cf7d5cd946d

C:\Users\Admin\AppData\Local\Temp\is-L0EUI.tmp\_iscrypt.dll

MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

memory/4928-138-0x0000000000400000-0x000000000041E000-memory.dmp

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

MD5 2c4eb645fa6e9d780e5877cee6184b41
SHA1 664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53
SHA256 78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0
SHA512 5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

memory/4756-139-0x0000000000000000-mapping.dmp

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

MD5 2c4eb645fa6e9d780e5877cee6184b41
SHA1 664bfcb927a9d7e2c51d5ab0f46f8e4a584a2a53
SHA256 78130bbde3d251ee73c93293f201e98c6adf097c60b6666b980223b06f85d7e0
SHA512 5377230c82db99d260c04466166c4aabe8c8d81c324c738d11e574b3461f1e1b37e4258d136a9b1ceac7de0b5abbff79019fbc77f67241f181b3934e34c43072

memory/4756-142-0x0000000000400000-0x000000000151A000-memory.dmp

memory/4756-143-0x0000000000400000-0x000000000151A000-memory.dmp

memory/4756-144-0x0000000000400000-0x000000000151A000-memory.dmp

memory/972-145-0x0000000000000000-mapping.dmp

C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\E0Eed6piSGpN.exe

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

C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\E0Eed6piSGpN.exe

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

memory/4756-148-0x0000000010000000-0x000000001001B000-memory.dmp

memory/4756-152-0x0000000000400000-0x000000000151A000-memory.dmp

memory/4000-153-0x0000000000000000-mapping.dmp

memory/4856-154-0x0000000000000000-mapping.dmp

memory/4756-155-0x0000000000400000-0x000000000151A000-memory.dmp

memory/4928-156-0x0000000000400000-0x000000000041E000-memory.dmp