nymaim | 969d616eab423fd1243cda0ad99ea0139e3f82b4bd566e149aec52aeda6ba283

Analysis

max time kernel
139s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
25/11/2022, 01:01

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General

Target
file.exe
Size 1.3MB
Sample221125-bc8rasbb38
SHA256 969d616eab423fd1243cda0ad99ea0139e3f82b4bd566e149aec52aeda6ba283
MD5 bc0510af78be8421ec51a90ea051bf0c
SHA1 673fcbe9191791686952aa80343a60e483d1a73b
SHA512 67cbe5037aba20b1dd511dcd2ce394e1cb13706c38e176860218da9ddb41dd566054579641280e11ba3491545ca0e9a562817b63be149f937299946594bb8098
SSDEEP 24576:tizPS6/5djQKKpS/42qk3N2TP7XdxezSvePEV2SqbazHJogZIY7eCLxYiy:GPS6/Tvq0N2TPLM8ePEES/HNNeViy
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
3220	is-EMR2O.tmp
4384	PrintFolders.exe
4836	hXsi8.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3220	is-EMR2O.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-R6JDH.tmp	is-EMR2O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-N1EP1.tmp	is-EMR2O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GVCSD.tmp	is-EMR2O.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-EMR2O.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-EMR2O.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-EMR2O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8FHT2.tmp	is-EMR2O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QF2GT.tmp	is-EMR2O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HU3VE.tmp	is-EMR2O.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
4588	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4384	PrintFolders.exe
4384	PrintFolders.exe
4384	PrintFolders.exe
4384	PrintFolders.exe
4384	PrintFolders.exe
4384	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4588	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3144 wrote to memory of 3220	3144	file.exe	81
PID 3144 wrote to memory of 3220	3144	file.exe	81
PID 3144 wrote to memory of 3220	3144	file.exe	81
PID 3220 wrote to memory of 4384	3220	is-EMR2O.tmp	82
PID 3220 wrote to memory of 4384	3220	is-EMR2O.tmp	82
PID 3220 wrote to memory of 4384	3220	is-EMR2O.tmp	82
PID 4384 wrote to memory of 4836	4384	PrintFolders.exe	83
PID 4384 wrote to memory of 4836	4384	PrintFolders.exe	83
PID 4384 wrote to memory of 4836	4384	PrintFolders.exe	83
PID 4384 wrote to memory of 4492	4384	PrintFolders.exe	85
PID 4384 wrote to memory of 4492	4384	PrintFolders.exe	85
PID 4384 wrote to memory of 4492	4384	PrintFolders.exe	85
PID 4492 wrote to memory of 4588	4492	cmd.exe	87
PID 4492 wrote to memory of 4588	4492	cmd.exe	87
PID 4492 wrote to memory of 4588	4492	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3144
- C:\Users\Admin\AppData\Local\Temp\is-DG51K.tmp\is-EMR2O.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-DG51K.tmp\is-EMR2O.tmp" /SL4 $90058 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1085403 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3220
- - 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:4384
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\hXsi8.exe
      4⤵
      Executes dropped EXE
      PID:4836
  - - 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:4492
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4588

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 1.7MB
SHA256 05b6a34938bc9430231072db0c6ddb2e59c4820692b9f46ca5014967b1983a7b
MD5 bf3fe89fd01abaf2b5cc6cb3ce2b4135
SHA1 adac78aa0c70876864c46d2cd7c701382689f839
SHA512 979b2eb30f235a8067004460518450c9c1a8c107cc211747bc6ea365a6faf6eab9cc5c222ee4f3f7b5bd839a20257cd22ca8771a0b2708f00e9b8590e4a7b9ee
SSDEEP 24576:h+lZ4H+9ZmG+I+p+h+M6Z+gYx+h07w3d2ljgUvScIClaLtpBIKlfza7/:wj9eBowMV0uwNs5qvxt5s7/
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 05b6a34938bc9430231072db0c6ddb2e59c4820692b9f46ca5014967b1983a7b
MD5 bf3fe89fd01abaf2b5cc6cb3ce2b4135
SHA1 adac78aa0c70876864c46d2cd7c701382689f839
SHA512 979b2eb30f235a8067004460518450c9c1a8c107cc211747bc6ea365a6faf6eab9cc5c222ee4f3f7b5bd839a20257cd22ca8771a0b2708f00e9b8590e4a7b9ee
SSDEEP 24576:h+lZ4H+9ZmG+I+p+h+M6Z+gYx+h07w3d2ljgUvScIClaLtpBIKlfza7/:wj9eBowMV0uwNs5qvxt5s7/
MD5 SHA1 SHA512 SSDEEP

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is-EMR2O.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-DG51K.tmp\is-EMR2O.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-EMR2O.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-DG51K.tmp\is-EMR2O.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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hXsi8.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\hXsi8.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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hXsi8.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\hXsi8.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/3144-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3144-155-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3144-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4384-143-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/4384-142-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/4384-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4384-151-0x0000000000400000-0x00000000013B4000-memory.dmp

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memory/4384-154-0x0000000000400000-0x00000000013B4000-memory.dmp

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