nymaim | eba4b8b392e5c68fc8f9f2ae9801544010813ff71597ee6d2773e71e90c64e02

Analysis

max time kernel
101s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
09/12/2022, 23:17

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General

Target
file.exe
Size 2.3MB
Sample221209-29pb2ahd8t
SHA256 eba4b8b392e5c68fc8f9f2ae9801544010813ff71597ee6d2773e71e90c64e02
MD5 84031c1a2494242402643379d1b5c2ef
SHA1 bff4f5d0b6b0c05786c6cd57f9fc6ddfffbfc842
SHA512 3c7c2bef54f231b1c2f4ef65042a5254cbba29175687611e9741e9260d29a81ea21aa5f97576e5ae2e43a478a9fb9d116fef5df5570a6185d6786fafd2c0cdc4
SSDEEP 49152:6qHtvx5xogynFUW1MeKe8q00teVMYNIdhfin/2WxM1klnZa:6wtvrpyn31MNJYeVNNGI24Vc
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
4112	is-N3TGV.tmp
2504	ntFolders.exe
4016	9wa47.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	ntFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4112	is-N3TGV.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-N3TGV.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-N3TGV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GBFSL.tmp	is-N3TGV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-S0F7I.tmp	is-N3TGV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4GBNV.tmp	is-N3TGV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7I4RA.tmp	is-N3TGV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1FV26.tmp	is-N3TGV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3DMDU.tmp	is-N3TGV.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ntFolders.exe	is-N3TGV.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
4712	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2504	ntFolders.exe
2504	ntFolders.exe
2504	ntFolders.exe
2504	ntFolders.exe
2504	ntFolders.exe
2504	ntFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4712	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4800 wrote to memory of 4112	4800	file.exe	81
PID 4800 wrote to memory of 4112	4800	file.exe	81
PID 4800 wrote to memory of 4112	4800	file.exe	81
PID 4112 wrote to memory of 2504	4112	is-N3TGV.tmp	82
PID 4112 wrote to memory of 2504	4112	is-N3TGV.tmp	82
PID 4112 wrote to memory of 2504	4112	is-N3TGV.tmp	82
PID 2504 wrote to memory of 4016	2504	ntFolders.exe	83
PID 2504 wrote to memory of 4016	2504	ntFolders.exe	83
PID 2504 wrote to memory of 4016	2504	ntFolders.exe	83
PID 2504 wrote to memory of 4380	2504	ntFolders.exe	86
PID 2504 wrote to memory of 4380	2504	ntFolders.exe	86
PID 2504 wrote to memory of 4380	2504	ntFolders.exe	86
PID 4380 wrote to memory of 4712	4380	cmd.exe	88
PID 4380 wrote to memory of 4712	4380	cmd.exe	88
PID 4380 wrote to memory of 4712	4380	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4800
- C:\Users\Admin\AppData\Local\Temp\is-EA797.tmp\is-N3TGV.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-EA797.tmp\is-N3TGV.tmp" /SL4 $D0042 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2185643 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4112
- - C:\Program Files (x86)\PrintFolders\ntFolders.exe
    "C:\Program Files (x86)\PrintFolders\ntFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2504
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\9wa47.exe
      4⤵
      Executes dropped EXE
      PID:4016
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ntFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\ntFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4380
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4712

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

ntFolders.exe

Path C:\Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.4MB
SHA256 7f21bbfe870f723bc5f881911230f94ed73132b4c19925fc4f614755b4ba5d39
MD5 71b6e25e901d84c88796947bebe8701e
SHA1 d27a90babea74bf0d1fcf1fa16195f9db5aca76b
SHA512 31062310a78026383a34f7e75ec586224e53a3ff4ae1b0720310a058b1bd37b61ceec8b9f57d1f3f1ca57ccab48b122acd45ea04e96534eb7fef08de46908803
SSDEEP 49152:sBE1X1WTwR/wcazLXcHKIhBsEfZzBUWbUYidoORRExn:sBE1X1WTwRDaX+5hBsYZzBUyUYiqdn
MD5 SHA1 SHA512 SSDEEP

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ntFolders.exe

Path C:\Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.4MB
SHA256 7f21bbfe870f723bc5f881911230f94ed73132b4c19925fc4f614755b4ba5d39
MD5 71b6e25e901d84c88796947bebe8701e
SHA1 d27a90babea74bf0d1fcf1fa16195f9db5aca76b
SHA512 31062310a78026383a34f7e75ec586224e53a3ff4ae1b0720310a058b1bd37b61ceec8b9f57d1f3f1ca57ccab48b122acd45ea04e96534eb7fef08de46908803
SSDEEP 49152:sBE1X1WTwR/wcazLXcHKIhBsEfZzBUWbUYidoORRExn:sBE1X1WTwRDaX+5hBsYZzBUyUYiqdn
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-27DUE.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-N3TGV.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EA797.tmp\is-N3TGV.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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is-N3TGV.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-EA797.tmp\is-N3TGV.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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9wa47.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\9wa47.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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9wa47.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\9wa47.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/2504-143-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/2504-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2504-142-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/2504-155-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/2504-144-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/2504-152-0x0000000000400000-0x0000000001571000-memory.dmp

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memory/4800-137-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4800-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4800-156-0x0000000000400000-0x000000000041E000-memory.dmp

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