nymaim | 7ef33a3be0522b3a021ff93a68dfbc75b6d86d2d37239426d265a61d82f1dfc4

Analysis

max time kernel
104s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
13/12/2022, 01:31

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General

Target
file.exe
Size 2.1MB
Sample221213-bxdfwsdd54
SHA256 7ef33a3be0522b3a021ff93a68dfbc75b6d86d2d37239426d265a61d82f1dfc4
MD5 1f80580b723d006bfb89ffbb4b88b517
SHA1 25c7ca3703392a551fdf8706174c6e3758203284
SHA512 795f4309cb20358055aed5909e7a29a030b90e6899776191f06c1f98a513a8ef14ab8bd87eb178e9a7aeeb85f4348bd1b72304d02ed408633657ce146642503b
SSDEEP 49152:GFrSru2UN3e+RcwocSy96g8/AcEDjLVcoyko59+dLWS1OBZf:GFrS6VZF3XRlL+ody+1pOJ
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
4524	is-3GJ4N.tmp
1532	nwFolders.exe
3084	j00vEYfij.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	nwFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4524	is-3GJ4N.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\is-7HA0G.tmp	is-3GJ4N.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-3GJ4N.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nwFolders.exe	is-3GJ4N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2TCNI.tmp	is-3GJ4N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NLK8O.tmp	is-3GJ4N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SCGJ0.tmp	is-3GJ4N.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-3GJ4N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9526O.tmp	is-3GJ4N.tmp
File created	C:\Program Files (x86)\PrintFolders\is-OE7V6.tmp	is-3GJ4N.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
3064	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1532	nwFolders.exe
1532	nwFolders.exe
1532	nwFolders.exe
1532	nwFolders.exe
1532	nwFolders.exe
1532	nwFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3064	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4160 wrote to memory of 4524	4160	file.exe	84
PID 4160 wrote to memory of 4524	4160	file.exe	84
PID 4160 wrote to memory of 4524	4160	file.exe	84
PID 4524 wrote to memory of 1532	4524	is-3GJ4N.tmp	85
PID 4524 wrote to memory of 1532	4524	is-3GJ4N.tmp	85
PID 4524 wrote to memory of 1532	4524	is-3GJ4N.tmp	85
PID 1532 wrote to memory of 3084	1532	nwFolders.exe	86
PID 1532 wrote to memory of 3084	1532	nwFolders.exe	86
PID 1532 wrote to memory of 3084	1532	nwFolders.exe	86
PID 1532 wrote to memory of 824	1532	nwFolders.exe	95
PID 1532 wrote to memory of 824	1532	nwFolders.exe	95
PID 1532 wrote to memory of 824	1532	nwFolders.exe	95
PID 824 wrote to memory of 3064	824	cmd.exe	97
PID 824 wrote to memory of 3064	824	cmd.exe	97
PID 824 wrote to memory of 3064	824	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4160
- C:\Users\Admin\AppData\Local\Temp\is-ICB7G.tmp\is-3GJ4N.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-ICB7G.tmp\is-3GJ4N.tmp" /SL4 $8002C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1989706 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4524
- - C:\Program Files (x86)\PrintFolders\nwFolders.exe
    "C:\Program Files (x86)\PrintFolders\nwFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1532
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\j00vEYfij.exe
      4⤵
      Executes dropped EXE
      PID:3084
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nwFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nwFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:824
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nwFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3064

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

nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.2MB
SHA256 50cc7434d7543abe939389a3e8e8c67fb2eb30f5f14fa05f1a43ab757e5e250a
MD5 6846fa8d0757c2d4796ddf6bd3be40d7
SHA1 00a2097fb14b7942058913f4044abb2672817d43
SHA512 9657f99e48815815b919f2b954d9cc8fd76e3329d35e72a6c8fb4b42fcdd35e8c6cb17837c77487a9d241cf80cf7cbaa81397caa9d3a5eaa1fae4315958a9b77
SSDEEP 49152:V6etOXNZcR/F5+Qpqo2th4ZDsMTOAimkMpQoAUk:VTtOXNGRt57pz2f4VsMTOA5kMpQZH
MD5 SHA1 SHA512 SSDEEP

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nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.2MB
SHA256 50cc7434d7543abe939389a3e8e8c67fb2eb30f5f14fa05f1a43ab757e5e250a
MD5 6846fa8d0757c2d4796ddf6bd3be40d7
SHA1 00a2097fb14b7942058913f4044abb2672817d43
SHA512 9657f99e48815815b919f2b954d9cc8fd76e3329d35e72a6c8fb4b42fcdd35e8c6cb17837c77487a9d241cf80cf7cbaa81397caa9d3a5eaa1fae4315958a9b77
SSDEEP 49152:V6etOXNZcR/F5+Qpqo2th4ZDsMTOAimkMpQoAUk:VTtOXNGRt57pz2f4VsMTOA5kMpQZH
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-AU7TN.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-3GJ4N.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-ICB7G.tmp\is-3GJ4N.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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is-3GJ4N.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-ICB7G.tmp\is-3GJ4N.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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j00vEYfij.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\j00vEYfij.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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j00vEYfij.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\j00vEYfij.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/1532-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1532-142-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/1532-143-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/1532-144-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/1532-152-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/1532-155-0x0000000000400000-0x000000000153C000-memory.dmp

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memory/4160-138-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4160-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4160-156-0x0000000000400000-0x000000000041E000-memory.dmp

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