nymaim | 8a1d05dc9bbd91bbfbdc1850065b864d02d0dcf954ea4d99ab9c5b9748fe6d05

Analysis

max time kernel
63s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
15/12/2022, 03:31

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General

Target
file.exe
Size 2.3MB
Sample221215-d2216aef2y
SHA256 8a1d05dc9bbd91bbfbdc1850065b864d02d0dcf954ea4d99ab9c5b9748fe6d05
MD5 55490450d5078ae25eeb42b0edbefd2f
SHA1 a184e2fd8db72f6e502f557e742d1613aaaf5b5e
SHA512 e7afa47d739292dbbb042f79d7244db0afbf31e5347d8b562fb50f3870ddb032046669a718d4d31a3a595ed21061e92eeaae3efd5dd2ab37605801aee4dde625
SSDEEP 49152:kNur/tAvXAmC0fjuNkVAfqzViOJ0zH4ZcdM+VnfyobsbY36QGxl5Zp2zeOCgSY/8:kNy/GPAlqjuNOAfQYO0H4mNZa8ss3gxJ
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
3004	is-16198.tmp
4188	nzFolders.exe
1876	eqsceBAYOYyj.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	nzFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3004	is-16198.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\unins000.dat	is-16198.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BA9N1.tmp	is-16198.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-16198.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nzFolders.exe	is-16198.tmp
File created	C:\Program Files (x86)\PrintFolders\is-M1F4N.tmp	is-16198.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0HQOR.tmp	is-16198.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NEL13.tmp	is-16198.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1PP6M.tmp	is-16198.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DSQFU.tmp	is-16198.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
1448	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4188	nzFolders.exe
4188	nzFolders.exe
4188	nzFolders.exe
4188	nzFolders.exe
4188	nzFolders.exe
4188	nzFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1448	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 3004	2440	file.exe	79
PID 2440 wrote to memory of 3004	2440	file.exe	79
PID 2440 wrote to memory of 3004	2440	file.exe	79
PID 3004 wrote to memory of 4188	3004	is-16198.tmp	80
PID 3004 wrote to memory of 4188	3004	is-16198.tmp	80
PID 3004 wrote to memory of 4188	3004	is-16198.tmp	80
PID 4188 wrote to memory of 1876	4188	nzFolders.exe	81
PID 4188 wrote to memory of 1876	4188	nzFolders.exe	81
PID 4188 wrote to memory of 1876	4188	nzFolders.exe	81
PID 4188 wrote to memory of 4216	4188	nzFolders.exe	90
PID 4188 wrote to memory of 4216	4188	nzFolders.exe	90
PID 4188 wrote to memory of 4216	4188	nzFolders.exe	90
PID 4216 wrote to memory of 1448	4216	cmd.exe	92
PID 4216 wrote to memory of 1448	4216	cmd.exe	92
PID 4216 wrote to memory of 1448	4216	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Users\Admin\AppData\Local\Temp\is-7F0DS.tmp\is-16198.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-7F0DS.tmp\is-16198.tmp" /SL4 $C01CC "C:\Users\Admin\AppData\Local\Temp\file.exe" 2124777 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3004
- - C:\Program Files (x86)\PrintFolders\nzFolders.exe
    "C:\Program Files (x86)\PrintFolders\nzFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4188
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\eqsceBAYOYyj.exe
      4⤵
      Executes dropped EXE
      PID:1876
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nzFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nzFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4216
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nzFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1448

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

nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 78258849a90f4f5682efa1617fe40b60ecb09cf9717b329ac4fe058db3fad316
MD5 f67bfeaf9b3c5bbad0ab44db6ae2715e
SHA1 5a23632e1155ffb75af79e1f4466669014fd358e
SHA512 f18e06b50e78bad4bd436b4a4649092b05dbca1dd5a32d85c62227d4dfa10936c89661e6f8615d87907b535308a89720cff6a9a2abea85631745fea698ef5cfb
SSDEEP 98304:Ezw1leioMfuIYZLixpJqTDisAnswVyUQ1JVbbL:ffuJ1
MD5 SHA1 SHA512 SSDEEP

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nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 78258849a90f4f5682efa1617fe40b60ecb09cf9717b329ac4fe058db3fad316
MD5 f67bfeaf9b3c5bbad0ab44db6ae2715e
SHA1 5a23632e1155ffb75af79e1f4466669014fd358e
SHA512 f18e06b50e78bad4bd436b4a4649092b05dbca1dd5a32d85c62227d4dfa10936c89661e6f8615d87907b535308a89720cff6a9a2abea85631745fea698ef5cfb
SSDEEP 98304:Ezw1leioMfuIYZLixpJqTDisAnswVyUQ1JVbbL:ffuJ1
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-16QKG.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-16198.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-7F0DS.tmp\is-16198.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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is-16198.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-7F0DS.tmp\is-16198.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

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eqsceBAYOYyj.exe

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

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\eqsceBAYOYyj.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/2440-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/2440-150-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/2440-155-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4188-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4188-151-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/4188-142-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/4188-154-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/4188-141-0x0000000000400000-0x0000000001548000-memory.dmp

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