nymaim | 404b6fd0d019e07775b642488de23bdabab6ad891e277cd63cd7eb0be70f07c8

Analysis

max time kernel
106s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
15/12/2022, 15:02

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General

Target
file.exe
Size 2.2MB
Sample221215-sefa7sfe9x
SHA256 404b6fd0d019e07775b642488de23bdabab6ad891e277cd63cd7eb0be70f07c8
MD5 9873ad592bcd911a14cf1407ac0953a8
SHA1 d8f5f89bb08169f59d25baa3d6faf6ba6bf5294b
SHA512 59a6d87bec97a9cdf98ba3de34bd708e3e98715f6fe8bbb1a66a568429becc082a85d1f6ba14ffbbd7ba24cb290943d68b8455b7dfa2bdd2241e17f2c86df24d
SSDEEP 49152:cNur/FPZzRMWJEfQlO+P+6C0OxXNntJqCCR/9vxFqGaUfveOCgSY/7:cNy/FxtPJE4l+WcXXICCRV5FqGaUXcYz
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
4744	is-65APT.tmp
1896	nzFolders.exe
388	SMr97MICIY4DrM.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	nzFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4744	is-65APT.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-A61LM.tmp	is-65APT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-IA0Q1.tmp	is-65APT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-65APT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nzFolders.exe	is-65APT.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-65APT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-S8O26.tmp	is-65APT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UE2VT.tmp	is-65APT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-U78GM.tmp	is-65APT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-L1MHS.tmp	is-65APT.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
3392	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1896	nzFolders.exe
1896	nzFolders.exe
1896	nzFolders.exe
1896	nzFolders.exe
1896	nzFolders.exe
1896	nzFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3392	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3936 wrote to memory of 4744	3936	file.exe	80
PID 3936 wrote to memory of 4744	3936	file.exe	80
PID 3936 wrote to memory of 4744	3936	file.exe	80
PID 4744 wrote to memory of 1896	4744	is-65APT.tmp	81
PID 4744 wrote to memory of 1896	4744	is-65APT.tmp	81
PID 4744 wrote to memory of 1896	4744	is-65APT.tmp	81
PID 1896 wrote to memory of 388	1896	nzFolders.exe	85
PID 1896 wrote to memory of 388	1896	nzFolders.exe	85
PID 1896 wrote to memory of 388	1896	nzFolders.exe	85
PID 1896 wrote to memory of 2756	1896	nzFolders.exe	90
PID 1896 wrote to memory of 2756	1896	nzFolders.exe	90
PID 1896 wrote to memory of 2756	1896	nzFolders.exe	90
PID 2756 wrote to memory of 3392	2756	cmd.exe	92
PID 2756 wrote to memory of 3392	2756	cmd.exe	92
PID 2756 wrote to memory of 3392	2756	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:3936
- C:\Users\Admin\AppData\Local\Temp\is-9L8U8.tmp\is-65APT.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-9L8U8.tmp\is-65APT.tmp" /SL4 $B005E "C:\Users\Admin\AppData\Local\Temp\file.exe" 2073781 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4744
- - 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:1896
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\SMr97MICIY4DrM.exe
      4⤵
      Executes dropped EXE
      PID:388
  - - 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:2756
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nzFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3392

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 71ca7f20d2494c6a4e1bcb72f80aaeba5933d14c580c37a7425ee286e1de60c9
MD5 e0de267bbc39c65a15ca57efbd843c87
SHA1 926671f85b0c7be5d6545f554eacdadea31c5b84
SHA512 0fe79cc3118d62f3dcad655b27c3a9ff1385406e56ab74f102c422de09ecb970429f63cbc2c88a32d0b454310bc501a9bb5232a2ea92e7847f31a8ea5c49223a
SSDEEP 98304:+cmjBwm592dfPCWA/2bCiOMjQcjZur768jcKpY:tffF
MD5 SHA1 SHA512 SSDEEP

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nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 71ca7f20d2494c6a4e1bcb72f80aaeba5933d14c580c37a7425ee286e1de60c9
MD5 e0de267bbc39c65a15ca57efbd843c87
SHA1 926671f85b0c7be5d6545f554eacdadea31c5b84
SHA512 0fe79cc3118d62f3dcad655b27c3a9ff1385406e56ab74f102c422de09ecb970429f63cbc2c88a32d0b454310bc501a9bb5232a2ea92e7847f31a8ea5c49223a
SSDEEP 98304:+cmjBwm592dfPCWA/2bCiOMjQcjZur768jcKpY:tffF
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-275KE.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-65APT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9L8U8.tmp\is-65APT.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-65APT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9L8U8.tmp\is-65APT.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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SMr97MICIY4DrM.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\SMr97MICIY4DrM.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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SMr97MICIY4DrM.exe

Path C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\SMr97MICIY4DrM.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/1896-143-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/1896-142-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/1896-144-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/1896-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1896-152-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/1896-155-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/3936-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/3936-137-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/3936-156-0x0000000000400000-0x0000000000439000-memory.dmp

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