nymaim | 123103bccf7e674fc3e501286f8f63122c6222aaa1cdf51e8515d044332968ae

Analysis

max time kernel
90s
max time network
147s
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, 09:47

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General

Target
file.exe
Size 2.3MB
Sample221215-lr7gwsfb21
SHA256 123103bccf7e674fc3e501286f8f63122c6222aaa1cdf51e8515d044332968ae
MD5 9cbdb8f40eacf1d49b62248eb2717358
SHA1 92735ac41741e90312ad48dc1f43164619d8b9cf
SHA512 556a8e0ded499e52b53af592849ad77f38d83850aad47fa38d238c161dff05ca7b9c4a7afb3d3911593172ed8f20ad9ef385a50109124bf45682e4c31ad78396
SSDEEP 49152:0Nur/LmaB3ZPRpKd5y2X9tx/sAv9V67TnWqxkPrY9xBAv3r1GTVwy0eOCgSY/L:0Ny/Lb3Z5I5btpHTmT+rY9jAvr1GTVwj
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
3632	is-86ILH.tmp
876	nzFolders.exe
3160	PpUpDsfpxyQFrI.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	nzFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3632	is-86ILH.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-BFF53.tmp	is-86ILH.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AAQ6E.tmp	is-86ILH.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nzFolders.exe	is-86ILH.tmp
File created	C:\Program Files (x86)\PrintFolders\is-CD0BH.tmp	is-86ILH.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KV2M9.tmp	is-86ILH.tmp
File created	C:\Program Files (x86)\PrintFolders\is-66E7C.tmp	is-86ILH.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-86ILH.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5202U.tmp	is-86ILH.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-86ILH.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
1740	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
876	nzFolders.exe
876	nzFolders.exe
876	nzFolders.exe
876	nzFolders.exe
876	nzFolders.exe
876	nzFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1740	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 3632	2876	file.exe	79
PID 2876 wrote to memory of 3632	2876	file.exe	79
PID 2876 wrote to memory of 3632	2876	file.exe	79
PID 3632 wrote to memory of 876	3632	is-86ILH.tmp	80
PID 3632 wrote to memory of 876	3632	is-86ILH.tmp	80
PID 3632 wrote to memory of 876	3632	is-86ILH.tmp	80
PID 876 wrote to memory of 3160	876	nzFolders.exe	81
PID 876 wrote to memory of 3160	876	nzFolders.exe	81
PID 876 wrote to memory of 3160	876	nzFolders.exe	81
PID 876 wrote to memory of 4120	876	nzFolders.exe	89
PID 876 wrote to memory of 4120	876	nzFolders.exe	89
PID 876 wrote to memory of 4120	876	nzFolders.exe	89
PID 4120 wrote to memory of 1740	4120	cmd.exe	91
PID 4120 wrote to memory of 1740	4120	cmd.exe	91
PID 4120 wrote to memory of 1740	4120	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2876
- C:\Users\Admin\AppData\Local\Temp\is-N1211.tmp\is-86ILH.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-N1211.tmp\is-86ILH.tmp" /SL4 $80048 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2123436 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3632
- - 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:876
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\PpUpDsfpxyQFrI.exe
      4⤵
      Executes dropped EXE
      PID:3160
  - - 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:4120
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nzFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1740

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 6cfd26f765510eef81e358266ff0ddaf1d28213aec4556c5d30fab4a645c9ab2
MD5 9a7c9dd957b6d178c6c332d838a7a890
SHA1 a69bb071632516c07488f3645833280212b6b7a5
SHA512 83751dceebd5f0af8311839d3769209729f413c9df9142620f32449c05582d5340a0a287b9c3d6c88d9d2112d510c47378441dc8e0578d4ef0b0957c5f0f1663
SSDEEP 98304:34ilEC0wnX7fs97KgE+/Wyx9YSIL2porY1h:6Efs5b
MD5 SHA1 SHA512 SSDEEP

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nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 6cfd26f765510eef81e358266ff0ddaf1d28213aec4556c5d30fab4a645c9ab2
MD5 9a7c9dd957b6d178c6c332d838a7a890
SHA1 a69bb071632516c07488f3645833280212b6b7a5
SHA512 83751dceebd5f0af8311839d3769209729f413c9df9142620f32449c05582d5340a0a287b9c3d6c88d9d2112d510c47378441dc8e0578d4ef0b0957c5f0f1663
SSDEEP 98304:34ilEC0wnX7fs97KgE+/Wyx9YSIL2porY1h:6Efs5b
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-0CMJD.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-86ILH.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-N1211.tmp\is-86ILH.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-86ILH.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-N1211.tmp\is-86ILH.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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PpUpDsfpxyQFrI.exe

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

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\PpUpDsfpxyQFrI.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/876-151-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/876-142-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/876-143-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/876-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/876-154-0x0000000000400000-0x0000000001548000-memory.dmp

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memory/2876-138-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/2876-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/2876-155-0x0000000000400000-0x0000000000439000-memory.dmp

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