nymaim | 45071210ca5f2d5660db489b8d47da31259edff657fca879f832cad03c40ef0b

Analysis

max time kernel
91s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
14/12/2022, 17:03

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General

Target
file.exe
Size 2.5MB
Sample221214-vknwmsae84
SHA256 45071210ca5f2d5660db489b8d47da31259edff657fca879f832cad03c40ef0b
MD5 028320ee5e38e00123d8474e6968c7a7
SHA1 a98ab52e4939cb420c3af8acbcc3a296390260c7
SHA512 b2685998bc4ee411822ce21e3924e982644bb777af86a40587fedd114012091be05bfb86639909de7890ae08a78463bc8c2ebae4f594566b912a15fd7c0d797a
SSDEEP 49152:ENur/8ZfewY5/4TQVKd16+0bI2xupVmWf4i57TeOCgSY/w:ENy/4tQAiKdkdM2xuVtLfcY/w
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
544	is-IB9N6.tmp
4916	nyFolders.exe
2416	B1IUYPa.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	nyFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
544	is-IB9N6.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-IB9N6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8TKTA.tmp	is-IB9N6.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-IB9N6.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nyFolders.exe	is-IB9N6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7NS1A.tmp	is-IB9N6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DKEJM.tmp	is-IB9N6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BD1CU.tmp	is-IB9N6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JNAAH.tmp	is-IB9N6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0S0KS.tmp	is-IB9N6.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
3464	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4916	nyFolders.exe
4916	nyFolders.exe
4916	nyFolders.exe
4916	nyFolders.exe
4916	nyFolders.exe
4916	nyFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3464	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 544	3016	file.exe	79
PID 3016 wrote to memory of 544	3016	file.exe	79
PID 3016 wrote to memory of 544	3016	file.exe	79
PID 544 wrote to memory of 4916	544	is-IB9N6.tmp	80
PID 544 wrote to memory of 4916	544	is-IB9N6.tmp	80
PID 544 wrote to memory of 4916	544	is-IB9N6.tmp	80
PID 4916 wrote to memory of 2416	4916	nyFolders.exe	81
PID 4916 wrote to memory of 2416	4916	nyFolders.exe	81
PID 4916 wrote to memory of 2416	4916	nyFolders.exe	81
PID 4916 wrote to memory of 2776	4916	nyFolders.exe	89
PID 4916 wrote to memory of 2776	4916	nyFolders.exe	89
PID 4916 wrote to memory of 2776	4916	nyFolders.exe	89
PID 2776 wrote to memory of 3464	2776	cmd.exe	91
PID 2776 wrote to memory of 3464	2776	cmd.exe	91
PID 2776 wrote to memory of 3464	2776	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3016
- C:\Users\Admin\AppData\Local\Temp\is-R68UE.tmp\is-IB9N6.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-R68UE.tmp\is-IB9N6.tmp" /SL4 $90048 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2296771 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:544
- - C:\Program Files (x86)\PrintFolders\nyFolders.exe
    "C:\Program Files (x86)\PrintFolders\nyFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4916
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\B1IUYPa.exe
      4⤵
      Executes dropped EXE
      PID:2416
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nyFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nyFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2776
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nyFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3464

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

nyFolders.exe

Path C:\Program Files (x86)\PrintFolders\nyFolders.exe
Size 3.6MB
SHA256 ae902cc1754892b877a4cd927d8e091f4ba81171cc6db8e4318b0d256390695d
MD5 9703e1d57947c1df429b770a411b323f
SHA1 0a67661aa75b9556f8721ca654d0f5c0c1aa150c
SHA512 dd0d123a9c6f166adfeae1b1f2d8767b0dd953588c75d6db7e18800affecb95cf22f8293fb6b803dc69cbdc4d126e98f8db0a2a458938d98feeead616f8d471c
SSDEEP 98304:G6q/Vr/tA+NNyfhy/xWMBPtSf4Bc8+eGGwjPfxZD:OEf+ufH
MD5 SHA1 SHA512 SSDEEP

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nyFolders.exe

Path C:\Program Files (x86)\PrintFolders\nyFolders.exe
Size 3.6MB
SHA256 ae902cc1754892b877a4cd927d8e091f4ba81171cc6db8e4318b0d256390695d
MD5 9703e1d57947c1df429b770a411b323f
SHA1 0a67661aa75b9556f8721ca654d0f5c0c1aa150c
SHA512 dd0d123a9c6f166adfeae1b1f2d8767b0dd953588c75d6db7e18800affecb95cf22f8293fb6b803dc69cbdc4d126e98f8db0a2a458938d98feeead616f8d471c
SSDEEP 98304:G6q/Vr/tA+NNyfhy/xWMBPtSf4Bc8+eGGwjPfxZD:OEf+ufH
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-7BAPM.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-IB9N6.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-R68UE.tmp\is-IB9N6.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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is-IB9N6.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-R68UE.tmp\is-IB9N6.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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B1IUYPa.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\B1IUYPa.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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B1IUYPa.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\B1IUYPa.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/3016-136-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/3016-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/3016-155-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4916-143-0x0000000000400000-0x0000000001596000-memory.dmp

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memory/4916-151-0x0000000000400000-0x0000000001596000-memory.dmp

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memory/4916-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4916-142-0x0000000000400000-0x0000000001596000-memory.dmp

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memory/4916-154-0x0000000000400000-0x0000000001596000-memory.dmp

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