nymaim | 350d0aacffdab4a63cc2b429f91d0c4a2cc767d3da154361f5228ed409c7d6dd

Analysis

max time kernel
91s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
26/11/2022, 16:17

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General

Target
file.exe
Size 2.0MB
Sample221126-trclhsfh85
SHA256 350d0aacffdab4a63cc2b429f91d0c4a2cc767d3da154361f5228ed409c7d6dd
MD5 d8f6ff05f1331506728d21187aa2e6c5
SHA1 d995dc1f5cf5d0fce8491a49a2e6f7601f839822
SHA512 f1b7cc4be3ba6d8f5a98df57620bf520affa9470f01a44ab98bc9cd4a38b1a0a75197c123415bd15ca10d077dd12dadafae646c0091542fde38ac2b77c7f6689
SSDEEP 49152:c3WKyTERpQgsp7jq64YbphHGX/YpWWlw+ruAG5cyR:c3McpzsdtxVJGX/Yplw9XcyR
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
5024	is-VGEQ1.tmp
1324	PrintFolders.exe
392	G9B4x.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
5024	is-VGEQ1.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\PrintFolders.exe	is-VGEQ1.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LUB7I.tmp	is-VGEQ1.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VGEQ1.tmp
File created	C:\Program Files (x86)\PrintFolders\is-V9N8D.tmp	is-VGEQ1.tmp
File created	C:\Program Files (x86)\PrintFolders\is-75LJ5.tmp	is-VGEQ1.tmp
File created	C:\Program Files (x86)\PrintFolders\is-OMUM6.tmp	is-VGEQ1.tmp
File created	C:\Program Files (x86)\PrintFolders\is-92D9M.tmp	is-VGEQ1.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-VGEQ1.tmp
File created	C:\Program Files (x86)\PrintFolders\is-Q6NV3.tmp	is-VGEQ1.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
4740	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1324	PrintFolders.exe
1324	PrintFolders.exe
1324	PrintFolders.exe
1324	PrintFolders.exe
1324	PrintFolders.exe
1324	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4740	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4540 wrote to memory of 5024	4540	file.exe	81
PID 4540 wrote to memory of 5024	4540	file.exe	81
PID 4540 wrote to memory of 5024	4540	file.exe	81
PID 5024 wrote to memory of 1324	5024	is-VGEQ1.tmp	82
PID 5024 wrote to memory of 1324	5024	is-VGEQ1.tmp	82
PID 5024 wrote to memory of 1324	5024	is-VGEQ1.tmp	82
PID 1324 wrote to memory of 392	1324	PrintFolders.exe	83
PID 1324 wrote to memory of 392	1324	PrintFolders.exe	83
PID 1324 wrote to memory of 392	1324	PrintFolders.exe	83
PID 1324 wrote to memory of 3508	1324	PrintFolders.exe	92
PID 1324 wrote to memory of 3508	1324	PrintFolders.exe	92
PID 1324 wrote to memory of 3508	1324	PrintFolders.exe	92
PID 3508 wrote to memory of 4740	3508	cmd.exe	94
PID 3508 wrote to memory of 4740	3508	cmd.exe	94
PID 3508 wrote to memory of 4740	3508	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:4540
- C:\Users\Admin\AppData\Local\Temp\is-B54C9.tmp\is-VGEQ1.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-B54C9.tmp\is-VGEQ1.tmp" /SL4 $C003A "C:\Users\Admin\AppData\Local\Temp\file.exe" 1901248 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:5024
- - 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 use of WriteProcessMemory
    PID:1324
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\G9B4x.exe
      4⤵
      Executes dropped EXE
      PID:392
  - - 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:3508
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4740

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 27224bfe91f47cb7de95822d93cb500a39b3a3d017bcc5ef0d0fd8dcbab9a8e9
MD5 7791ee89d2df0bef22c154316566c82a
SHA1 32477fccd235770bbf82cb13b14f0ebe317f5733
SHA512 6bf93e73b742b93056b9dc622042d94e3282d96eef35fc891532e45015e77dabf30428e75f608cbcd4054f0467e2cc83f055a9fcb76784ffa06881b587de893f
SSDEEP 49152:K7g4X14edanyTVN4l9oR41juJwa9HGzXI:K7g4XeedRTVN4l9oR41KJn9mzY
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 27224bfe91f47cb7de95822d93cb500a39b3a3d017bcc5ef0d0fd8dcbab9a8e9
MD5 7791ee89d2df0bef22c154316566c82a
SHA1 32477fccd235770bbf82cb13b14f0ebe317f5733
SHA512 6bf93e73b742b93056b9dc622042d94e3282d96eef35fc891532e45015e77dabf30428e75f608cbcd4054f0467e2cc83f055a9fcb76784ffa06881b587de893f
SSDEEP 49152:K7g4X14edanyTVN4l9oR41juJwa9HGzXI:K7g4XeedRTVN4l9oR41KJn9mzY
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-17L9S.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-VGEQ1.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-B54C9.tmp\is-VGEQ1.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-VGEQ1.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-B54C9.tmp\is-VGEQ1.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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G9B4x.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\G9B4x.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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G9B4x.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\G9B4x.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/1324-145-0x0000000000400000-0x0000000001549000-memory.dmp

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memory/1324-146-0x0000000000400000-0x0000000001549000-memory.dmp

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memory/1324-147-0x0000000000400000-0x0000000001549000-memory.dmp

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memory/1324-151-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1324-155-0x0000000000400000-0x0000000001549000-memory.dmp

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memory/1324-158-0x0000000000400000-0x0000000001549000-memory.dmp

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memory/4540-135-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4540-140-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4540-159-0x0000000000400000-0x0000000000413000-memory.dmp

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