nymaim | 3f17df623c9ebef8a246e81999e4dfc3607a0c211f6eaa6391a226bb95cf47b5

Analysis

max time kernel
90s
max time network
110s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
02/12/2022, 17:33

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General

Target
file.exe
Size 2.1MB
Sample221202-v4w2csda2x
SHA256 3f17df623c9ebef8a246e81999e4dfc3607a0c211f6eaa6391a226bb95cf47b5
MD5 e8beeefbd4b9dd9a9dcb02ebb5ad066e
SHA1 4f5fb7e41a5396bf99c142848b194ef2112bc4ea
SHA512 ba5ae1a6a30f48bf933458db4f973a43378a2d775716a390cd67ef807c696d7ed31dd20022e9c78b5bbb0ab62f36a2e4d0a3303f1792d796e30fc3e9e22c3179
SSDEEP 49152:IqQmPCBXHteUHMa45KMDa2f1z98TXyTTJXGWdsk0nOAG5cyG:Iq5PC5Htd45KMe21z987NW6nOXcyG
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
3816	is-00RKE.tmp
2664	PrintFolders.exe
4716	3R0qewSNIT.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
3816	is-00RKE.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-IA9HI.tmp	is-00RKE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-H8H1J.tmp	is-00RKE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-H8NJM.tmp	is-00RKE.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-00RKE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TBTN7.tmp	is-00RKE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-85U5A.tmp	is-00RKE.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-00RKE.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-00RKE.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VKTJQ.tmp	is-00RKE.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
2440	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2664	PrintFolders.exe
2664	PrintFolders.exe
2664	PrintFolders.exe
2664	PrintFolders.exe
2664	PrintFolders.exe
2664	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2440	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4640 wrote to memory of 3816	4640	file.exe	81
PID 4640 wrote to memory of 3816	4640	file.exe	81
PID 4640 wrote to memory of 3816	4640	file.exe	81
PID 3816 wrote to memory of 2664	3816	is-00RKE.tmp	82
PID 3816 wrote to memory of 2664	3816	is-00RKE.tmp	82
PID 3816 wrote to memory of 2664	3816	is-00RKE.tmp	82
PID 2664 wrote to memory of 4716	2664	PrintFolders.exe	83
PID 2664 wrote to memory of 4716	2664	PrintFolders.exe	83
PID 2664 wrote to memory of 4716	2664	PrintFolders.exe	83
PID 2664 wrote to memory of 428	2664	PrintFolders.exe	92
PID 2664 wrote to memory of 428	2664	PrintFolders.exe	92
PID 2664 wrote to memory of 428	2664	PrintFolders.exe	92
PID 428 wrote to memory of 2440	428	cmd.exe	94
PID 428 wrote to memory of 2440	428	cmd.exe	94
PID 428 wrote to memory of 2440	428	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:4640
- C:\Users\Admin\AppData\Local\Temp\is-F2UUM.tmp\is-00RKE.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-F2UUM.tmp\is-00RKE.tmp" /SL4 $80066 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1931236 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3816
- - 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:2664
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\3R0qewSNIT.exe
      4⤵
      Executes dropped EXE
      PID:4716
  - - 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:428
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2440

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 89d1efcf5b5fd91530d8071b2bfac99c2905504328706b0c44c3137772231ca8
MD5 3749c1be59fbd47cb87060f583148fab
SHA1 c08cddd875fb3df7e55fabd35eb403c4e378fa42
SHA512 d1780a7af9ba5b269e84aab718825eea68a57949d4e2116ef289abdcf412e19fb6ff8fca9212cafdf740d0094a97e1bd35d40cc6c566b2ee3f5605f5f23aea11
SSDEEP 49152:cp5QLnlsSJUEI+0C6zREqG9qG2IvPIqrnF6vT:M5QDCSJq+07zREqTOIqrnF6b
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.3MB
SHA256 89d1efcf5b5fd91530d8071b2bfac99c2905504328706b0c44c3137772231ca8
MD5 3749c1be59fbd47cb87060f583148fab
SHA1 c08cddd875fb3df7e55fabd35eb403c4e378fa42
SHA512 d1780a7af9ba5b269e84aab718825eea68a57949d4e2116ef289abdcf412e19fb6ff8fca9212cafdf740d0094a97e1bd35d40cc6c566b2ee3f5605f5f23aea11
SSDEEP 49152:cp5QLnlsSJUEI+0C6zREqG9qG2IvPIqrnF6vT:M5QDCSJq+07zREqTOIqrnF6b
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-63KCV.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-00RKE.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-F2UUM.tmp\is-00RKE.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-00RKE.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-F2UUM.tmp\is-00RKE.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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3R0qewSNIT.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\3R0qewSNIT.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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3R0qewSNIT.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\3R0qewSNIT.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/2664-143-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/2664-144-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/2664-142-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/2664-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2664-152-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/2664-155-0x0000000000400000-0x0000000001552000-memory.dmp

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memory/4640-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4640-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4640-156-0x0000000000400000-0x0000000000413000-memory.dmp

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