nymaim | 8e4d60fbedd0fda50ffe79d2ad1831790d0258d2d421acb942100e40d2ae0253

Analysis

max time kernel
185s
max time network
194s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
03/12/2022, 21:32

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 3.4MB
Sample221203-1dlqlaff42
SHA256 8e4d60fbedd0fda50ffe79d2ad1831790d0258d2d421acb942100e40d2ae0253
MD5 3c4f62e575eee7954b28d9195a1867b4
SHA1 74fe05ba5b7767e2df691cd5d8a8528cc860e724
SHA512 ed52afab1bde2fb7f4a59578e1a35ce56ad69a36cddb7c9eaad78a7aa1f9da563037252c507da711398e06e0bf6736401a833bc2b0f2a25c7bd2d4f7cefedd3f
SSDEEP 98304:IX3/na2FU1sDpkVZwEUtBmuJsWTftRozfJ2PAEqSldBv/yFXcy5:4fDcsDuwqRdU9qikFXcy5
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
1508	is-5R3S5.tmp
2172	PrintFolders.exe
2072	YPCYJgx.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1508	is-5R3S5.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-AH0M6.tmp	is-5R3S5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SESQE.tmp	is-5R3S5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KLSQT.tmp	is-5R3S5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8C7D7.tmp	is-5R3S5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PLLC0.tmp	is-5R3S5.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-5R3S5.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-5R3S5.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-5R3S5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9AM99.tmp	is-5R3S5.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
3724	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2172	PrintFolders.exe
2172	PrintFolders.exe
2172	PrintFolders.exe
2172	PrintFolders.exe
2172	PrintFolders.exe
2172	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2172	PrintFolders.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1260 wrote to memory of 1508	1260	file.exe	83
PID 1260 wrote to memory of 1508	1260	file.exe	83
PID 1260 wrote to memory of 1508	1260	file.exe	83
PID 1508 wrote to memory of 2172	1508	is-5R3S5.tmp	84
PID 1508 wrote to memory of 2172	1508	is-5R3S5.tmp	84
PID 1508 wrote to memory of 2172	1508	is-5R3S5.tmp	84
PID 2172 wrote to memory of 2072	2172	PrintFolders.exe	88
PID 2172 wrote to memory of 2072	2172	PrintFolders.exe	88
PID 2172 wrote to memory of 2072	2172	PrintFolders.exe	88
PID 2172 wrote to memory of 3844	2172	PrintFolders.exe	98
PID 2172 wrote to memory of 3844	2172	PrintFolders.exe	98
PID 2172 wrote to memory of 3844	2172	PrintFolders.exe	98
PID 3844 wrote to memory of 3724	3844	cmd.exe	100
PID 3844 wrote to memory of 3724	3844	cmd.exe	100
PID 3844 wrote to memory of 3724	3844	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1260
- C:\Users\Admin\AppData\Local\Temp\is-EH8UP.tmp\is-5R3S5.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-EH8UP.tmp\is-5R3S5.tmp" /SL4 $B006A "C:\Users\Admin\AppData\Local\Temp\file.exe" 3357242 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1508
- - 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 behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:2172
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\YPCYJgx.exe
      4⤵
      Executes dropped EXE
      PID:2072
  - - 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:3844
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        
        PID:3724

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 5.7MB
SHA256 91771072ff61e5506b51f936e7889eb75be62dc9fe0df56f7d33b458084108cf
MD5 ecceb829154188a97f9625df68cfc8d0
SHA1 adb21f5449a8d71afb255210c5d6667eb7a1b7ef
SHA512 70d7065686e80e97260b35d318c6a67661fd84aa7bddc7d8d73c20253b8d0ab92ae393030dbcb6f7cc87ba6151164004da8ccdb439e7a42cf9595f6c9d32956b
SSDEEP 98304:I7eF/jd75PniyBES6O0x5oiJvjbMVx91f:nB75FEG
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 5.7MB
SHA256 91771072ff61e5506b51f936e7889eb75be62dc9fe0df56f7d33b458084108cf
MD5 ecceb829154188a97f9625df68cfc8d0
SHA1 adb21f5449a8d71afb255210c5d6667eb7a1b7ef
SHA512 70d7065686e80e97260b35d318c6a67661fd84aa7bddc7d8d73c20253b8d0ab92ae393030dbcb6f7cc87ba6151164004da8ccdb439e7a42cf9595f6c9d32956b
SSDEEP 98304:I7eF/jd75PniyBES6O0x5oiJvjbMVx91f:nB75FEG
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-5R3S5.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EH8UP.tmp\is-5R3S5.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-5R3S5.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EH8UP.tmp\is-5R3S5.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-KLU0D.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

YPCYJgx.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\YPCYJgx.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

YPCYJgx.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\YPCYJgx.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/1260-137-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/1260-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/2172-143-0x0000000000400000-0x00000000017BD000-memory.dmp

Download

memory/2172-145-0x0000000000400000-0x00000000017BD000-memory.dmp

Download

memory/2172-144-0x0000000000400000-0x00000000017BD000-memory.dmp

Download

memory/2172-142-0x0000000000400000-0x00000000017BD000-memory.dmp

Download

memory/2172-149-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/2172-155-0x0000000000400000-0x00000000017BD000-memory.dmp

Download