nymaim | fcaa44b7f0190e554570e72ad38f44fd313ae035f4083e8fff5bc3937519e649

Analysis

max time kernel
147s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
13/12/2022, 18:33

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.2MB
Sample221213-w665saaa9y
SHA256 fcaa44b7f0190e554570e72ad38f44fd313ae035f4083e8fff5bc3937519e649
MD5 906351c0c7832892982a98f03cb080b8
SHA1 c615d36967b51f04fc626b680f6d3d03593213aa
SHA512 4c60e823b79a7dbf77afe227e8e8f7e9fb5bf91975798267ec6a3fa06ee483b031eafd7a098841f76ed8a58dea51d8ef179abc37ebacb3ac6827ea3fe823f9c8
SSDEEP 49152:NLM4UAZtFe+L8D9saVB12v3+nCD/ht+de9oqqCAR:NLMVAZ/szg3EKptie9oqqP
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-6L9AS.tmp
3324	nxFolders.exe
4052	JmqH3GVaJ.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	nxFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4756	is-6L9AS.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-QQLTJ.tmp	is-6L9AS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-OLP5B.tmp	is-6L9AS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6B211.tmp	is-6L9AS.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-6L9AS.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nxFolders.exe	is-6L9AS.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-6L9AS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SE9H3.tmp	is-6L9AS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-E0BQC.tmp	is-6L9AS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DQTAP.tmp	is-6L9AS.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
3508	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3324	nxFolders.exe
3324	nxFolders.exe
3324	nxFolders.exe
3324	nxFolders.exe
3324	nxFolders.exe
3324	nxFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3508	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4224 wrote to memory of 4756	4224	file.exe	80
PID 4224 wrote to memory of 4756	4224	file.exe	80
PID 4224 wrote to memory of 4756	4224	file.exe	80
PID 4756 wrote to memory of 3324	4756	is-6L9AS.tmp	81
PID 4756 wrote to memory of 3324	4756	is-6L9AS.tmp	81
PID 4756 wrote to memory of 3324	4756	is-6L9AS.tmp	81
PID 3324 wrote to memory of 4052	3324	nxFolders.exe	82
PID 3324 wrote to memory of 4052	3324	nxFolders.exe	82
PID 3324 wrote to memory of 4052	3324	nxFolders.exe	82
PID 3324 wrote to memory of 2484	3324	nxFolders.exe	90
PID 3324 wrote to memory of 2484	3324	nxFolders.exe	90
PID 3324 wrote to memory of 2484	3324	nxFolders.exe	90
PID 2484 wrote to memory of 3508	2484	cmd.exe	92
PID 2484 wrote to memory of 3508	2484	cmd.exe	92
PID 2484 wrote to memory of 3508	2484	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:4224
- C:\Users\Admin\AppData\Local\Temp\is-MBPFC.tmp\is-6L9AS.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-MBPFC.tmp\is-6L9AS.tmp" /SL4 $D01C0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2075757 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:3324
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\JmqH3GVaJ.exe
      4⤵
      Executes dropped EXE
      PID:4052
  - - 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:2484
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nxFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3508

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 8fe0807c0026bd3058ebba794dc5f3ee7f42d380e20643fd196f9708147a4b0f
MD5 5c2d434610be4a0b393111f3fea07d75
SHA1 eaec09303e11047abd3e32651c33a2f4ec1e2a55
SHA512 bccec11c914840d05c9f93fa602343076cb6ebe77dad28a3bf130aaff46a477063416fdfa1252dc138b72611d08d40f4774fe4d854259aa2bdbe8450e48b439f
SSDEEP 49152:KBrBHz8XGevzfAMtHjHVi3HEqqsb/YkgAGoF:KBrBHMGerfAMtHj10EqqyDgAZ
MD5 SHA1 SHA512 SSDEEP

Submit Download

nxFolders.exe

Path C:\Program Files (x86)\PrintFolders\nxFolders.exe
Size 3.3MB
SHA256 8fe0807c0026bd3058ebba794dc5f3ee7f42d380e20643fd196f9708147a4b0f
MD5 5c2d434610be4a0b393111f3fea07d75
SHA1 eaec09303e11047abd3e32651c33a2f4ec1e2a55
SHA512 bccec11c914840d05c9f93fa602343076cb6ebe77dad28a3bf130aaff46a477063416fdfa1252dc138b72611d08d40f4774fe4d854259aa2bdbe8450e48b439f
SSDEEP 49152:KBrBHz8XGevzfAMtHjHVi3HEqqsb/YkgAGoF:KBrBHMGerfAMtHj10EqqyDgAZ
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-6L9AS.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MBPFC.tmp\is-6L9AS.tmp
Size 760KB
SHA256 f92bcd82630801e6015811bd7c19b8392b9cb80c476b40a50f5c38b6a79634d7
MD5 8586221a52b8c9c25d579b5bd6e5a2ad
SHA1 8b8167f74e4a2e6885bf54ee904e9195cf51a6c1
SHA512 6225c56f72a6b5bf4a1f0623030a473344c4b6452a3e05aa87145aefe03286ee3096c62148196f4f016bba5848138a1933287eda5b59bcd6657c3bf1e40ce8d2
SSDEEP 12288:Nh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvSmLN9MHHxOw:z5NoqWolrP837JzHvA6yknyWFxvzMHHV
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-6L9AS.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MBPFC.tmp\is-6L9AS.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-VRM9R.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

JmqH3GVaJ.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\JmqH3GVaJ.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

JmqH3GVaJ.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\JmqH3GVaJ.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/3324-148-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/3324-142-0x0000000000400000-0x0000000001559000-memory.dmp

Download

memory/3324-143-0x0000000000400000-0x0000000001559000-memory.dmp

Download

memory/3324-144-0x0000000000400000-0x0000000001559000-memory.dmp

Download

memory/3324-152-0x0000000000400000-0x0000000001559000-memory.dmp

Download

memory/3324-155-0x0000000000400000-0x0000000001559000-memory.dmp

Download

memory/4224-138-0x0000000000400000-0x0000000000430000-memory.dmp

Download

memory/4224-132-0x0000000000400000-0x0000000000430000-memory.dmp

Download

memory/4224-156-0x0000000000400000-0x0000000000430000-memory.dmp

Download