nymaim | 8322baa86bfa9f72635d152d4ab63304e5da5b020b540bfe6d791f8e293dc4c7

Analysis

max time kernel
90s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
30/11/2022, 11:32

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.2MB
Sample221130-nnad4afe42
SHA256 8322baa86bfa9f72635d152d4ab63304e5da5b020b540bfe6d791f8e293dc4c7
MD5 39ef6ec3fdfac6e259ef807ee73beddc
SHA1 f3832f10ee3a25a69dfa2eb278ccd7ad5f4c12f4
SHA512 fd317d35edd3d5c7f9680ed3227951cf316fc127842586f8043d28e0490ed9c172c9c4677d93a5d61e849475dabefb939a31653ba4e7d4e4d3d5a0854e4dffc5
SSDEEP 49152:UL7QpPzQ4Lb2o67WMUbHs3hPXyRZJb7ymX0P6ennAG5cyx:U6PzQ43l0WMUzs34RZInPlXcyx
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
1884	is-S2VN6.tmp
668	PrintFolders.exe
1168	DXk1ZrUWI.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1884	is-S2VN6.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-7I6HJ.tmp	is-S2VN6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KAUN6.tmp	is-S2VN6.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-S2VN6.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-S2VN6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HQVLN.tmp	is-S2VN6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QTD8Q.tmp	is-S2VN6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-V7P1E.tmp	is-S2VN6.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SK2QU.tmp	is-S2VN6.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-S2VN6.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
4068	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
668	PrintFolders.exe
668	PrintFolders.exe
668	PrintFolders.exe
668	PrintFolders.exe
668	PrintFolders.exe
668	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4068	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4324 wrote to memory of 1884	4324	file.exe	81
PID 4324 wrote to memory of 1884	4324	file.exe	81
PID 4324 wrote to memory of 1884	4324	file.exe	81
PID 1884 wrote to memory of 668	1884	is-S2VN6.tmp	82
PID 1884 wrote to memory of 668	1884	is-S2VN6.tmp	82
PID 1884 wrote to memory of 668	1884	is-S2VN6.tmp	82
PID 668 wrote to memory of 1168	668	PrintFolders.exe	83
PID 668 wrote to memory of 1168	668	PrintFolders.exe	83
PID 668 wrote to memory of 1168	668	PrintFolders.exe	83
PID 668 wrote to memory of 4896	668	PrintFolders.exe	91
PID 668 wrote to memory of 4896	668	PrintFolders.exe	91
PID 668 wrote to memory of 4896	668	PrintFolders.exe	91
PID 4896 wrote to memory of 4068	4896	cmd.exe	93
PID 4896 wrote to memory of 4068	4896	cmd.exe	93
PID 4896 wrote to memory of 4068	4896	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:4324
- C:\Users\Admin\AppData\Local\Temp\is-EAQMB.tmp\is-S2VN6.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-EAQMB.tmp\is-S2VN6.tmp" /SL4 $701C4 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2109756 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1884
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:668
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\DXk1ZrUWI.exe
      4⤵
      Executes dropped EXE
      PID:1168
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4896
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4068

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 7ff713a3fdf32fd9e49127e84b47f358fd96bfd4dae3c836adff9bb0f2880306
MD5 6e5787d36e6e9cf225a69141c0458159
SHA1 db4f7911a01310c624e70cc27d3059bf6163f6b1
SHA512 a6b8a09c7b7cbf87f54ffa5268ea21630c67e00cc8115f95c871b6b6c57193bcc39d78062c5c7d1c164f719a244498d1ade1a35114d114d3ce502618e16fe169
SSDEEP 24576:ZXP/5rLn2wkWihTIXUBsehU8p+YnnAXGY388LYnsoN72EjVBG3q8kieB7W:RX9L2w1ihrseh5nAXGoH07hxBG3deI
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 7ff713a3fdf32fd9e49127e84b47f358fd96bfd4dae3c836adff9bb0f2880306
MD5 6e5787d36e6e9cf225a69141c0458159
SHA1 db4f7911a01310c624e70cc27d3059bf6163f6b1
SHA512 a6b8a09c7b7cbf87f54ffa5268ea21630c67e00cc8115f95c871b6b6c57193bcc39d78062c5c7d1c164f719a244498d1ade1a35114d114d3ce502618e16fe169
SSDEEP 24576:ZXP/5rLn2wkWihTIXUBsehU8p+YnnAXGY388LYnsoN72EjVBG3q8kieB7W:RX9L2w1ihrseh5nAXGoH07hxBG3deI
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-S2VN6.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EAQMB.tmp\is-S2VN6.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-S2VN6.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EAQMB.tmp\is-S2VN6.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-S3C9V.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

DXk1ZrUWI.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\DXk1ZrUWI.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

DXk1ZrUWI.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\DXk1ZrUWI.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/668-143-0x0000000000400000-0x000000000154D000-memory.dmp

Download

memory/668-148-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/668-142-0x0000000000400000-0x000000000154D000-memory.dmp

Download

memory/668-154-0x0000000000400000-0x000000000154D000-memory.dmp

Download

memory/668-144-0x0000000000400000-0x000000000154D000-memory.dmp

Download

memory/668-152-0x0000000000400000-0x000000000154D000-memory.dmp

Download

memory/4324-137-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/4324-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/4324-156-0x0000000000400000-0x0000000000413000-memory.dmp

Download