nymaim | 92dfaa41bd92366f14e24ef7792d2026bdc394c2a7e146f3d4164148c500dc89

Analysis

max time kernel
91s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
12/12/2022, 07:01

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General

Target
file.exe
Size 2.3MB
Sample221212-hs8vkade5w
SHA256 92dfaa41bd92366f14e24ef7792d2026bdc394c2a7e146f3d4164148c500dc89
MD5 588eae2bf3686eb51d54551b93cd142d
SHA1 ff354e65b360094da41694a3a3e972b69d657ba3
SHA512 727752e60a5a06f34965a3a3bd44877fef1ecb80c3c35b7cb85fc8da962238668eb5f97aa20da11d6c5b48e16bec6333f7ffb0d9f41e6b254c66161c4bf06b8a
SSDEEP 49152:uFYsgX2NgJWzFcEr4WOm3HDILX4q3s8ZsqtWyRtbZf:uFYLQ+EDOxXHVeAjRtb1
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
5040	is-6H5JM.tmp
4072	nwFolders.exe
1168	rAGrzFU.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	nwFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
5040	is-6H5JM.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 opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-6H5JM.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-6H5JM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-S4EVL.tmp	is-6H5JM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-EQ24H.tmp	is-6H5JM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-N3AU4.tmp	is-6H5JM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LDC4B.tmp	is-6H5JM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KO42L.tmp	is-6H5JM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TFTMD.tmp	is-6H5JM.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nwFolders.exe	is-6H5JM.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
5024	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4072	nwFolders.exe
4072	nwFolders.exe
4072	nwFolders.exe
4072	nwFolders.exe
4072	nwFolders.exe
4072	nwFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5024	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4016 wrote to memory of 5040	4016	file.exe	50
PID 4016 wrote to memory of 5040	4016	file.exe	50
PID 4016 wrote to memory of 5040	4016	file.exe	50
PID 5040 wrote to memory of 4072	5040	is-6H5JM.tmp	83
PID 5040 wrote to memory of 4072	5040	is-6H5JM.tmp	83
PID 5040 wrote to memory of 4072	5040	is-6H5JM.tmp	83
PID 4072 wrote to memory of 1168	4072	nwFolders.exe	84
PID 4072 wrote to memory of 1168	4072	nwFolders.exe	84
PID 4072 wrote to memory of 1168	4072	nwFolders.exe	84
PID 4072 wrote to memory of 4660	4072	nwFolders.exe	92
PID 4072 wrote to memory of 4660	4072	nwFolders.exe	92
PID 4072 wrote to memory of 4660	4072	nwFolders.exe	92
PID 4660 wrote to memory of 5024	4660	cmd.exe	94
PID 4660 wrote to memory of 5024	4660	cmd.exe	94
PID 4660 wrote to memory of 5024	4660	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4016
- C:\Users\Admin\AppData\Local\Temp\is-5RF6T.tmp\is-6H5JM.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5RF6T.tmp\is-6H5JM.tmp" /SL4 $501C4 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2180337 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:5040
- - C:\Program Files (x86)\PrintFolders\nwFolders.exe
    "C:\Program Files (x86)\PrintFolders\nwFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4072
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\rAGrzFU.exe
      4⤵
      Executes dropped EXE
      PID:1168
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nwFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nwFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4660
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nwFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:5024

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

nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.6MB
SHA256 9ec8efcef49d0a8cbcf9db961c165503a1cd03faa91c1ee1061cfc55bebfac96
MD5 1a998e67bd3ef26ba4cb81b0040e0cf9
SHA1 170211e1ef8d737f55ebe100daf436307fa070d0
SHA512 f14c4960d746b81c19bf71b32b6a95cc5329cd0bd1d490783c2aea3484381918978b77b90726a10194c554b40e9afa432f939e48b40b345439dd60dc3f7a6aae
SSDEEP 98304:s62os10INyTSNFb4ECX0gF0NccPGS2bIzR5o:5u3JCcvo
MD5 SHA1 SHA512 SSDEEP

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nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.6MB
SHA256 9ec8efcef49d0a8cbcf9db961c165503a1cd03faa91c1ee1061cfc55bebfac96
MD5 1a998e67bd3ef26ba4cb81b0040e0cf9
SHA1 170211e1ef8d737f55ebe100daf436307fa070d0
SHA512 f14c4960d746b81c19bf71b32b6a95cc5329cd0bd1d490783c2aea3484381918978b77b90726a10194c554b40e9afa432f939e48b40b345439dd60dc3f7a6aae
SSDEEP 98304:s62os10INyTSNFb4ECX0gF0NccPGS2bIzR5o:5u3JCcvo
MD5 SHA1 SHA512 SSDEEP

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is-6H5JM.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5RF6T.tmp\is-6H5JM.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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is-6H5JM.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-5RF6T.tmp\is-6H5JM.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-UHK55.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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rAGrzFU.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\rAGrzFU.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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rAGrzFU.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\rAGrzFU.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/4016-156-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4016-139-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4016-133-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4072-144-0x0000000000400000-0x0000000001591000-memory.dmp

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memory/4072-143-0x0000000000400000-0x0000000001591000-memory.dmp

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memory/4072-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4072-152-0x0000000000400000-0x0000000001591000-memory.dmp

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memory/4072-154-0x0000000000400000-0x0000000001591000-memory.dmp

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