nymaim | 59d3fccc6439876570a7b0f09d1b2b6c859b55fa141973e1fbaacca0984a79af

Analysis

max time kernel
91s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
14/12/2022, 02:32

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.2MB
Sample221214-c1bbdabh8v
SHA256 59d3fccc6439876570a7b0f09d1b2b6c859b55fa141973e1fbaacca0984a79af
MD5 852935d6133b1ef82bf66dc98bb7e276
SHA1 3cf689c03a4d56384fd71fb0ad810c6f6e18f914
SHA512 667b1c74d4bc3d8d2d95fb5521f8ecdefd2a1144c4182798965e9e237f15e276adec8a557428c83f198700f8a60f6e8c6e6279aa4089532c143aed98de94388c
SSDEEP 49152:1LM4zgeEutvJAWBbRAihypsNKNYv0cOBcCtY20k30M8TV:1LMtutvyUdAihyp36BOBHtYZk3K
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
4756	is-DE8JI.tmp
4928	nxFolders.exe
4236	9b68u.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	nxFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4756	is-DE8JI.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-DE8JI.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nxFolders.exe	is-DE8JI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7UQUD.tmp	is-DE8JI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GIHQ9.tmp	is-DE8JI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-H0SMP.tmp	is-DE8JI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RSLRJ.tmp	is-DE8JI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QA92U.tmp	is-DE8JI.tmp
File created	C:\Program Files (x86)\PrintFolders\is-JISJU.tmp	is-DE8JI.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-DE8JI.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
3952	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4928	nxFolders.exe
4928	nxFolders.exe
4928	nxFolders.exe
4928	nxFolders.exe
4928	nxFolders.exe
4928	nxFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3952	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4964 wrote to memory of 4756	4964	file.exe	81
PID 4964 wrote to memory of 4756	4964	file.exe	81
PID 4964 wrote to memory of 4756	4964	file.exe	81
PID 4756 wrote to memory of 4928	4756	is-DE8JI.tmp	82
PID 4756 wrote to memory of 4928	4756	is-DE8JI.tmp	82
PID 4756 wrote to memory of 4928	4756	is-DE8JI.tmp	82
PID 4928 wrote to memory of 4236	4928	nxFolders.exe	83
PID 4928 wrote to memory of 4236	4928	nxFolders.exe	83
PID 4928 wrote to memory of 4236	4928	nxFolders.exe	83
PID 4928 wrote to memory of 4620	4928	nxFolders.exe	91
PID 4928 wrote to memory of 4620	4928	nxFolders.exe	91
PID 4928 wrote to memory of 4620	4928	nxFolders.exe	91
PID 4620 wrote to memory of 3952	4620	cmd.exe	93
PID 4620 wrote to memory of 3952	4620	cmd.exe	93
PID 4620 wrote to memory of 3952	4620	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:4964
- C:\Users\Admin\AppData\Local\Temp\is-FF1QM.tmp\is-DE8JI.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-FF1QM.tmp\is-DE8JI.tmp" /SL4 $70034 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2063249 170496
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4756
- - C:\Program Files (x86)\PrintFolders\nxFolders.exe
    "C:\Program Files (x86)\PrintFolders\nxFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4928
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\9b68u.exe
      4⤵
      Executes dropped EXE
      PID:4236
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nxFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nxFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4620
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nxFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3952

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

Loading Replay Monitor...

Downloads

nxFolders.exe

Path C:\Program Files (x86)\PrintFolders\nxFolders.exe
Size 3.3MB
SHA256 e7d6df0691217a22367d4f1a714f7ad0ea6580797f0729a426b9b1e3ecea5f44
MD5 741c6e2661f7a2139fdb645fd594d635
SHA1 a5cb068084f6609173c19d4fa63c1f559a806f2e
SHA512 8b27e20577e323c75c3c913fed32968133022d272c04173c1fdeadcd0c2ab6259a6cdbf5a575b5dcd0c8ff196f123e2abd7d5114decacd48065755fe4309a194
SSDEEP 49152:sCIHwpAs7aQ0TfAMiK9T8cs9n4cmT/1fdZZ2pIH:sCIH4As7aQqfAMiK1eJ4c4ddZZwe
MD5 SHA1 SHA512 SSDEEP

Submit Download

nxFolders.exe

Path C:\Program Files (x86)\PrintFolders\nxFolders.exe
Size 3.3MB
SHA256 e7d6df0691217a22367d4f1a714f7ad0ea6580797f0729a426b9b1e3ecea5f44
MD5 741c6e2661f7a2139fdb645fd594d635
SHA1 a5cb068084f6609173c19d4fa63c1f559a806f2e
SHA512 8b27e20577e323c75c3c913fed32968133022d272c04173c1fdeadcd0c2ab6259a6cdbf5a575b5dcd0c8ff196f123e2abd7d5114decacd48065755fe4309a194
SSDEEP 49152:sCIHwpAs7aQ0TfAMiK9T8cs9n4cmT/1fdZZ2pIH:sCIH4As7aQqfAMiK1eJ4c4ddZZwe
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-DE8JI.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-FF1QM.tmp\is-DE8JI.tmp
Size 760KB
SHA256 f92bcd82630801e6015811bd7c19b8392b9cb80c476b40a50f5c38b6a79634d7
MD5 8586221a52b8c9c25d579b5bd6e5a2ad
SHA1 8b8167f74e4a2e6885bf54ee904e9195cf51a6c1
SHA512 6225c56f72a6b5bf4a1f0623030a473344c4b6452a3e05aa87145aefe03286ee3096c62148196f4f016bba5848138a1933287eda5b59bcd6657c3bf1e40ce8d2
SSDEEP 12288:Nh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvSmLN9MHHxOw:z5NoqWolrP837JzHvA6yknyWFxvzMHHV
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-DE8JI.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-FF1QM.tmp\is-DE8JI.tmp
Size 760KB
SHA256 f92bcd82630801e6015811bd7c19b8392b9cb80c476b40a50f5c38b6a79634d7
MD5 8586221a52b8c9c25d579b5bd6e5a2ad
SHA1 8b8167f74e4a2e6885bf54ee904e9195cf51a6c1
SHA512 6225c56f72a6b5bf4a1f0623030a473344c4b6452a3e05aa87145aefe03286ee3096c62148196f4f016bba5848138a1933287eda5b59bcd6657c3bf1e40ce8d2
SSDEEP 12288:Nh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvSmLN9MHHxOw:z5NoqWolrP837JzHvA6yknyWFxvzMHHV
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-KNQS3.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

9b68u.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\9b68u.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

9b68u.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\9b68u.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/4928-143-0x0000000000400000-0x0000000001559000-memory.dmp

Download

memory/4928-142-0x0000000000400000-0x0000000001559000-memory.dmp

Download

memory/4928-147-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/4928-151-0x0000000000400000-0x0000000001559000-memory.dmp

Download

memory/4928-154-0x0000000000400000-0x0000000001559000-memory.dmp

Download

memory/4964-132-0x0000000000400000-0x0000000000430000-memory.dmp

Download

memory/4964-134-0x0000000000400000-0x0000000000430000-memory.dmp

Download

memory/4964-155-0x0000000000400000-0x0000000000430000-memory.dmp

Download