nymaim | 222c66c16a31b6b5eb8e24d6d440f66f91e8bed257b03999c7b3c411fb670d84

Analysis

max time kernel
126s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
13/12/2022, 02:01

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General

Target
file.exe
Size 2.3MB
Sample221213-cfkdjsdd73
SHA256 222c66c16a31b6b5eb8e24d6d440f66f91e8bed257b03999c7b3c411fb670d84
MD5 d307f816b2da97862f783b71ff8b95e3
SHA1 47b54468c83491f08b44df6e5f957beb8cb9961a
SHA512 0e330a0f62fdae2d3e2ef2e1da59fea95e9adcd7a4e1413c9ca1785dc49dbc760e2752e6c68e555f14b00768b4971f9092255ad3414f3eb79092c039cba5dc1b
SSDEEP 49152:GFP5WTdGRRh5p7LmfuNkFb/YhPyeOjLH3Mn80toljuZa:GFP5WT8N3NlhPyeOXXMJoFuQ
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
2368	is-OJ38A.tmp
1368	nwFolders.exe
1000	ZX82uydeji.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	nwFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2368	is-OJ38A.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\nwFolders.exe	is-OJ38A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5IQ6D.tmp	is-OJ38A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LN84N.tmp	is-OJ38A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4EUNF.tmp	is-OJ38A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SU34N.tmp	is-OJ38A.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OJ38A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4GBTF.tmp	is-OJ38A.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2L9N8.tmp	is-OJ38A.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OJ38A.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
3480	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1368	nwFolders.exe
1368	nwFolders.exe
1368	nwFolders.exe
1368	nwFolders.exe
1368	nwFolders.exe
1368	nwFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3480	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 448 wrote to memory of 2368	448	file.exe	85
PID 448 wrote to memory of 2368	448	file.exe	85
PID 448 wrote to memory of 2368	448	file.exe	85
PID 2368 wrote to memory of 1368	2368	is-OJ38A.tmp	86
PID 2368 wrote to memory of 1368	2368	is-OJ38A.tmp	86
PID 2368 wrote to memory of 1368	2368	is-OJ38A.tmp	86
PID 1368 wrote to memory of 1000	1368	nwFolders.exe	90
PID 1368 wrote to memory of 1000	1368	nwFolders.exe	90
PID 1368 wrote to memory of 1000	1368	nwFolders.exe	90
PID 1368 wrote to memory of 4656	1368	nwFolders.exe	95
PID 1368 wrote to memory of 4656	1368	nwFolders.exe	95
PID 1368 wrote to memory of 4656	1368	nwFolders.exe	95
PID 4656 wrote to memory of 3480	4656	cmd.exe	97
PID 4656 wrote to memory of 3480	4656	cmd.exe	97
PID 4656 wrote to memory of 3480	4656	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:448
- C:\Users\Admin\AppData\Local\Temp\is-9U1JV.tmp\is-OJ38A.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-9U1JV.tmp\is-OJ38A.tmp" /SL4 $10004A "C:\Users\Admin\AppData\Local\Temp\file.exe" 2116883 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2368
- - 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:1368
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\ZX82uydeji.exe
      4⤵
      Executes dropped EXE
      PID:1000
  - - 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:4656
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nwFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3480

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 3.4MB
SHA256 b70ea8f4b92a8a6e47a21dda9969e73c66019c14fd06c3ef19f0375e13a304a0
MD5 8ef41f2db7f42ec9289de63b710d6dab
SHA1 5c64c6633343ca4e2667f85c6dc8c8d06d12d2bf
SHA512 55f0ba1844d1abb2585447d8e5f25e83bb5b3f9a283e6792e1dfbc15f2debc091d9adcbacf6c517e01a4fa716eb10d5e00311108aa0ddc3aa912e5856abe291c
SSDEEP 49152:VS3riJ3e1GDX5P0RQpnnqrVDsfZ2oqXbhlv1Eko8jOwyTWik:VKriJ3e1GL5cmZq5KZ2oOlv1Eko8jOwx
MD5 SHA1 SHA512 SSDEEP

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nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.4MB
SHA256 b70ea8f4b92a8a6e47a21dda9969e73c66019c14fd06c3ef19f0375e13a304a0
MD5 8ef41f2db7f42ec9289de63b710d6dab
SHA1 5c64c6633343ca4e2667f85c6dc8c8d06d12d2bf
SHA512 55f0ba1844d1abb2585447d8e5f25e83bb5b3f9a283e6792e1dfbc15f2debc091d9adcbacf6c517e01a4fa716eb10d5e00311108aa0ddc3aa912e5856abe291c
SSDEEP 49152:VS3riJ3e1GDX5P0RQpnnqrVDsfZ2oqXbhlv1Eko8jOwyTWik:VKriJ3e1GL5cmZq5KZ2oOlv1Eko8jOwx
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-3BQAD.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-OJ38A.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9U1JV.tmp\is-OJ38A.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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is-OJ38A.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9U1JV.tmp\is-OJ38A.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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ZX82uydeji.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\ZX82uydeji.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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ZX82uydeji.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\ZX82uydeji.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/448-155-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/448-138-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/448-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/1368-143-0x0000000000400000-0x000000000156E000-memory.dmp

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memory/1368-142-0x0000000000400000-0x000000000156E000-memory.dmp

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memory/1368-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1368-151-0x0000000000400000-0x000000000156E000-memory.dmp

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memory/1368-154-0x0000000000400000-0x000000000156E000-memory.dmp

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