nymaim | 37be16b155fe766725b8e85ccd82a9e971266fb2df6fa46ae55696fd6d43e584

Analysis

max time kernel
91s
max time network
139s
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, 23:31

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General

Target
file.exe
Size 2.3MB
Sample221214-3hpddsbd56
SHA256 37be16b155fe766725b8e85ccd82a9e971266fb2df6fa46ae55696fd6d43e584
MD5 7e8f47a9c45ecfad789ea52bf6a43575
SHA1 cc9b68a73e281c8d578dedaf90a769584e37e31d
SHA512 f9553f296d8a9ff08ae45eba335a75180ff9584a770a4b6505e03c5cb2d44ee3c0183fc7afa8a6f73287190d0d874c472f9d8ce9e84aae55bc4e9faf07fd16f5
SSDEEP 49152:ANur/7AMYpn0C+m0j7lI6heYjvdY7ZfGSl8AoKSOP/0h/iMeOCgSY/j:ANy/Gp1nQy6MQGpJ8bJYScY/j
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
808	is-C032O.tmp
3472	nyFolders.exe
2496	USDq8OBYw.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	nyFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
808	is-C032O.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-RQ7IT.tmp	is-C032O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TJCGT.tmp	is-C032O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-IKJP7.tmp	is-C032O.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-C032O.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nyFolders.exe	is-C032O.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-C032O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6MC7Q.tmp	is-C032O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0IICB.tmp	is-C032O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-P1K0M.tmp	is-C032O.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
4160	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3472	nyFolders.exe
3472	nyFolders.exe
3472	nyFolders.exe
3472	nyFolders.exe
3472	nyFolders.exe
3472	nyFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4160	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3440 wrote to memory of 808	3440	file.exe	81
PID 3440 wrote to memory of 808	3440	file.exe	81
PID 3440 wrote to memory of 808	3440	file.exe	81
PID 808 wrote to memory of 3472	808	is-C032O.tmp	82
PID 808 wrote to memory of 3472	808	is-C032O.tmp	82
PID 808 wrote to memory of 3472	808	is-C032O.tmp	82
PID 3472 wrote to memory of 2496	3472	nyFolders.exe	85
PID 3472 wrote to memory of 2496	3472	nyFolders.exe	85
PID 3472 wrote to memory of 2496	3472	nyFolders.exe	85
PID 3472 wrote to memory of 3528	3472	nyFolders.exe	91
PID 3472 wrote to memory of 3528	3472	nyFolders.exe	91
PID 3472 wrote to memory of 3528	3472	nyFolders.exe	91
PID 3528 wrote to memory of 4160	3528	cmd.exe	93
PID 3528 wrote to memory of 4160	3528	cmd.exe	93
PID 3528 wrote to memory of 4160	3528	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3440
- C:\Users\Admin\AppData\Local\Temp\is-9U5SS.tmp\is-C032O.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-9U5SS.tmp\is-C032O.tmp" /SL4 $701D8 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2161149 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:808
- - 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:3472
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\USDq8OBYw.exe
      4⤵
      Executes dropped EXE
      PID:2496
  - - 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:3528
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nyFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4160

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 0be64790932a7b2d9362af8822fb3f90edfeaacd185f8ee64f66a2481cc0639a
MD5 538967aa57d384cd05286063650e8104
SHA1 afd99c8da7cf6358e674ca11f348bb7027cd670a
SHA512 ca013eabfecc50752cbe2dac4b2b56b5fa7936d488b32b256547378859af1db26644a15c66ddfea62d7b41ab1a711ed20acda8962234438a0465f24729d6aba8
SSDEEP 49152:QVTixACWqnOfhur/MZcpJrnaOB1Se9MbYVB5s/7ZG:Q1ixACWqOfhy/MZEraA1b9MYVB5s/74
MD5 SHA1 SHA512 SSDEEP

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nyFolders.exe

Path C:\Program Files (x86)\PrintFolders\nyFolders.exe
Size 3.4MB
SHA256 0be64790932a7b2d9362af8822fb3f90edfeaacd185f8ee64f66a2481cc0639a
MD5 538967aa57d384cd05286063650e8104
SHA1 afd99c8da7cf6358e674ca11f348bb7027cd670a
SHA512 ca013eabfecc50752cbe2dac4b2b56b5fa7936d488b32b256547378859af1db26644a15c66ddfea62d7b41ab1a711ed20acda8962234438a0465f24729d6aba8
SSDEEP 49152:QVTixACWqnOfhur/MZcpJrnaOB1Se9MbYVB5s/7ZG:Q1ixACWqOfhy/MZEraA1b9MYVB5s/74
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-00MQF.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-C032O.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9U5SS.tmp\is-C032O.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-C032O.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9U5SS.tmp\is-C032O.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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USDq8OBYw.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\USDq8OBYw.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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USDq8OBYw.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\USDq8OBYw.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/3440-138-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/3440-156-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/3440-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/3472-142-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/3472-144-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/3472-143-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/3472-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3472-152-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/3472-155-0x0000000000400000-0x0000000001564000-memory.dmp

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