nymaim | 60eedd59a3f8ec1a2398a5f7ff3763dd934612df4b72649962b18ca407641b29

Analysis

max time kernel
91s
max time network
107s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
14/12/2022, 09:17

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General

Target
file.exe
Size 2.3MB
Sample221214-k83place2t
SHA256 60eedd59a3f8ec1a2398a5f7ff3763dd934612df4b72649962b18ca407641b29
MD5 647234004a3afd397704c9ab086c1c54
SHA1 a2f9fb2e4788c5d78d37932b4a075a233ed035e7
SHA512 cf3e0f06b915c5936a99f07beeda83fc8471495a475722ade44ccead55c1460901f46175a820d65927354d88c277714655ae1c4459aa42d029ffd5b401831be9
SSDEEP 49152:UNur/IwRmrRsvd80iIahh0rCn1odo4rUTaLXOT4kIrL2BxMb2eOCgSY/Z:UNy/IwqRsy0ilhh0r5dpJXOs7rL2dcYh
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
4928	is-2D29E.tmp
1204	nyFolders.exe
5052	8B2h5KC.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	nyFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4928	is-2D29E.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-BM28P.tmp	is-2D29E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-IF7K1.tmp	is-2D29E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-U0VLH.tmp	is-2D29E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QGRVF.tmp	is-2D29E.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2D29E.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2D29E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2C21P.tmp	is-2D29E.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2EIBA.tmp	is-2D29E.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nyFolders.exe	is-2D29E.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
2672	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1204	nyFolders.exe
1204	nyFolders.exe
1204	nyFolders.exe
1204	nyFolders.exe
1204	nyFolders.exe
1204	nyFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2672	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4968 wrote to memory of 4928	4968	file.exe	80
PID 4968 wrote to memory of 4928	4968	file.exe	80
PID 4968 wrote to memory of 4928	4968	file.exe	80
PID 4928 wrote to memory of 1204	4928	is-2D29E.tmp	81
PID 4928 wrote to memory of 1204	4928	is-2D29E.tmp	81
PID 4928 wrote to memory of 1204	4928	is-2D29E.tmp	81
PID 1204 wrote to memory of 5052	1204	nyFolders.exe	84
PID 1204 wrote to memory of 5052	1204	nyFolders.exe	84
PID 1204 wrote to memory of 5052	1204	nyFolders.exe	84
PID 1204 wrote to memory of 2628	1204	nyFolders.exe	90
PID 1204 wrote to memory of 2628	1204	nyFolders.exe	90
PID 1204 wrote to memory of 2628	1204	nyFolders.exe	90
PID 2628 wrote to memory of 2672	2628	cmd.exe	92
PID 2628 wrote to memory of 2672	2628	cmd.exe	92
PID 2628 wrote to memory of 2672	2628	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4968
- C:\Users\Admin\AppData\Local\Temp\is-IKOJ2.tmp\is-2D29E.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-IKOJ2.tmp\is-2D29E.tmp" /SL4 $D0148 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2096617 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4928
- - 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:1204
  - - C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\8B2h5KC.exe
      4⤵
      Executes dropped EXE
      PID:5052
  - - 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:2628
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nyFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2672

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 3.4MB
SHA256 817dfd96e2eabe11c505de3b1fc15399db812416d8189ba6814788815d5343a5
MD5 a059a98d0a37daa7761481ea07366d3b
SHA1 6bdda54929471db563ffe8efbe8432d13d0f3a47
SHA512 3daae68384293d0b014bc706b1ed836a0664aa68f54017e993a874c5478277a0f2d6197c0ecfeaa800e91ac8d2fb4a41a5b0275f0f4dec0397a2aa48bbbb0c42
SSDEEP 98304:oAA08TvGnfhy/qylR3ZBJ2Z+Btz8ahAhnqaW6gjp:Nf+XZBJc2z/hp
MD5 SHA1 SHA512 SSDEEP

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nyFolders.exe

Path C:\Program Files (x86)\PrintFolders\nyFolders.exe
Size 3.4MB
SHA256 817dfd96e2eabe11c505de3b1fc15399db812416d8189ba6814788815d5343a5
MD5 a059a98d0a37daa7761481ea07366d3b
SHA1 6bdda54929471db563ffe8efbe8432d13d0f3a47
SHA512 3daae68384293d0b014bc706b1ed836a0664aa68f54017e993a874c5478277a0f2d6197c0ecfeaa800e91ac8d2fb4a41a5b0275f0f4dec0397a2aa48bbbb0c42
SSDEEP 98304:oAA08TvGnfhy/qylR3ZBJ2Z+Btz8ahAhnqaW6gjp:Nf+XZBJc2z/hp
MD5 SHA1 SHA512 SSDEEP

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is-2D29E.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-IKOJ2.tmp\is-2D29E.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-2D29E.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-IKOJ2.tmp\is-2D29E.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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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-MTDC7.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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8B2h5KC.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\8B2h5KC.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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8B2h5KC.exe

Path C:\Users\Admin\AppData\Roaming\{6eb576c0-6208-11ed-9190-806e6f6e6963}\8B2h5KC.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/1204-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1204-152-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/1204-143-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/1204-142-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/1204-144-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/1204-155-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/4968-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4968-138-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4968-156-0x0000000000400000-0x0000000000439000-memory.dmp

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