nymaim | cf217902e3b10d4a3af13541120f33ad5fb91ce1df59981534e57b2b6bccd330

Analysis

max time kernel
121s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
09/12/2022, 07:46

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General

Target
file.exe
Size 2.1MB
Sample221209-jly78afe7v
SHA256 cf217902e3b10d4a3af13541120f33ad5fb91ce1df59981534e57b2b6bccd330
MD5 49303b56f946b20aa1c7057c6c21414d
SHA1 ee06f7e248df0a784a1c7da8f274301d645836af
SHA512 e4a39b4761bcdb37ec55fecc5364b213f83b291dc9271994df55333e4ab100726a5d4be03231b2e24d826cbfca4cc09c7d1da557efeed1bca00b754756499155
SSDEEP 49152:KK0s8e/RWa/Ys9AXCV5sBu1VA/HzmDASpj3yGBVFhZ7esZl:KKz8SJiu5sBu1VksAubyGjJrz
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
1856	is-OP3CG.tmp
840	ntFolders.exe
3300	w5PzG5.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	ntFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1856	is-OP3CG.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-SK3E3.tmp	is-OP3CG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RO1SS.tmp	is-OP3CG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-Q0H90.tmp	is-OP3CG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RSPGS.tmp	is-OP3CG.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\ntFolders.exe	is-OP3CG.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OP3CG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KMJGJ.tmp	is-OP3CG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AMH8B.tmp	is-OP3CG.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-OP3CG.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
4600	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
840	ntFolders.exe
840	ntFolders.exe
840	ntFolders.exe
840	ntFolders.exe
840	ntFolders.exe
840	ntFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4600	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4572 wrote to memory of 1856	4572	file.exe	51
PID 4572 wrote to memory of 1856	4572	file.exe	51
PID 4572 wrote to memory of 1856	4572	file.exe	51
PID 1856 wrote to memory of 840	1856	is-OP3CG.tmp	82
PID 1856 wrote to memory of 840	1856	is-OP3CG.tmp	82
PID 1856 wrote to memory of 840	1856	is-OP3CG.tmp	82
PID 840 wrote to memory of 3300	840	ntFolders.exe	83
PID 840 wrote to memory of 3300	840	ntFolders.exe	83
PID 840 wrote to memory of 3300	840	ntFolders.exe	83
PID 840 wrote to memory of 4404	840	ntFolders.exe	91
PID 840 wrote to memory of 4404	840	ntFolders.exe	91
PID 840 wrote to memory of 4404	840	ntFolders.exe	91
PID 4404 wrote to memory of 4600	4404	cmd.exe	93
PID 4404 wrote to memory of 4600	4404	cmd.exe	93
PID 4404 wrote to memory of 4600	4404	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4572
- C:\Users\Admin\AppData\Local\Temp\is-AFK0I.tmp\is-OP3CG.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-AFK0I.tmp\is-OP3CG.tmp" /SL4 $10006C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1974474 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1856
- - 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:840
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\w5PzG5.exe
      4⤵
      Executes dropped EXE
      PID:3300
  - - 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:4404
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ntFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4600

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 3.2MB
SHA256 fa4700aa81e7906580661f336ab71eb1599f2091836b1b95ad7a3d8fdb114f77
MD5 61391823ebd8a2913c70d35eb01e98b7
SHA1 e28689af028364746cde402a2838553aa4caaa92
SHA512 48aa3f7a309c98dc04e980422977bf6864a2085dcbbff9334cbc989f91079329d081daac76d50c81fc45257811a76c01437bfd7faefde2adbb7ad6d668aa0f0d
SSDEEP 49152:30AMqhSxJe9ZEGT3o6TMZVLDgCyfhKzZsOQjVsS:30AMqhSxJIjc6TMZVLDgCMhGZYKS
MD5 SHA1 SHA512 SSDEEP

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ntFolders.exe

Path C:\Program Files (x86)\PrintFolders\ntFolders.exe
Size 3.2MB
SHA256 fa4700aa81e7906580661f336ab71eb1599f2091836b1b95ad7a3d8fdb114f77
MD5 61391823ebd8a2913c70d35eb01e98b7
SHA1 e28689af028364746cde402a2838553aa4caaa92
SHA512 48aa3f7a309c98dc04e980422977bf6864a2085dcbbff9334cbc989f91079329d081daac76d50c81fc45257811a76c01437bfd7faefde2adbb7ad6d668aa0f0d
SSDEEP 49152:30AMqhSxJe9ZEGT3o6TMZVLDgCyfhKzZsOQjVsS:30AMqhSxJIjc6TMZVLDgCMhGZYKS
MD5 SHA1 SHA512 SSDEEP

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is-OP3CG.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-AFK0I.tmp\is-OP3CG.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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is-OP3CG.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-AFK0I.tmp\is-OP3CG.tmp
Size 687KB
SHA256 2820d4bdbd9cab3eee82c86b11cfb2b8ec55247bcb975331078ecd182c1471b2
MD5 2c3832fdf847813369ec960cd39c8265
SHA1 35b24c0b451e987c1e2b07b670a65fbcb02b118c
SHA512 408a642264e967aaa78cc7b58529aaa152ba85af12a4dc7dba0a82e560e08299031cb45d8de78e5fa26f03fc6db863344aaa68e010f7ddda4fc29501365d986a
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvo6xOM:y5NoqWolrP837JzHvA6yknyWFxvVxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-I7OQJ.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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w5PzG5.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\w5PzG5.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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w5PzG5.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\w5PzG5.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/840-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/840-142-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/840-143-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/840-144-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/840-155-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/840-152-0x0000000000400000-0x000000000153F000-memory.dmp

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memory/4572-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4572-138-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4572-156-0x0000000000400000-0x000000000041E000-memory.dmp

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