nymaim | 3a66a8c0ce57bc0d60afca1ff3d70fd998b088d1499e32dc884f04ba94eb7395

Analysis

max time kernel
136s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
14/12/2022, 17:16

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General

Target
file.exe
Size 2.3MB
Sample221214-vs48ladd6z
SHA256 3a66a8c0ce57bc0d60afca1ff3d70fd998b088d1499e32dc884f04ba94eb7395
MD5 9133a96ef8d5b8f9d50437c875e56160
SHA1 d43a5540bf620b4c4d93ef07f5d574f461f1914e
SHA512 07440dc1a7df72c214f5044c389a841279bc641cf2c5ea712e8800b928c28287ee628b05be98466a2970c354112f1f7492e07f09606ad56387494ceb8dea5207
SSDEEP 49152:4Nur/S5Z3ZIbmWF/1TLWyRrqzd/XNHrbQe0OfrKdiqIeOCgSY/z:4Ny/SbZwm8/1YRtrbQeoccY/z
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
1680	is-NQ29O.tmp
4928	nyFolders.exe
4904	t6lTMFpA8YGJYa.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	nyFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1680	is-NQ29O.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-LKSD1.tmp	is-NQ29O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-V0LMT.tmp	is-NQ29O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QVEBN.tmp	is-NQ29O.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nyFolders.exe	is-NQ29O.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NQ29O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RFBH4.tmp	is-NQ29O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SOFUP.tmp	is-NQ29O.tmp
File created	C:\Program Files (x86)\PrintFolders\is-MAT12.tmp	is-NQ29O.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NQ29O.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
3168	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4928	nyFolders.exe
4928	nyFolders.exe
4928	nyFolders.exe
4928	nyFolders.exe
4928	nyFolders.exe
4928	nyFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3168	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4468 wrote to memory of 1680	4468	file.exe	80
PID 4468 wrote to memory of 1680	4468	file.exe	80
PID 4468 wrote to memory of 1680	4468	file.exe	80
PID 1680 wrote to memory of 4928	1680	is-NQ29O.tmp	81
PID 1680 wrote to memory of 4928	1680	is-NQ29O.tmp	81
PID 1680 wrote to memory of 4928	1680	is-NQ29O.tmp	81
PID 4928 wrote to memory of 4904	4928	nyFolders.exe	82
PID 4928 wrote to memory of 4904	4928	nyFolders.exe	82
PID 4928 wrote to memory of 4904	4928	nyFolders.exe	82
PID 4928 wrote to memory of 2124	4928	nyFolders.exe	92
PID 4928 wrote to memory of 2124	4928	nyFolders.exe	92
PID 4928 wrote to memory of 2124	4928	nyFolders.exe	92
PID 2124 wrote to memory of 3168	2124	cmd.exe	94
PID 2124 wrote to memory of 3168	2124	cmd.exe	94
PID 2124 wrote to memory of 3168	2124	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:4468
- C:\Users\Admin\AppData\Local\Temp\is-VEGKC.tmp\is-NQ29O.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-VEGKC.tmp\is-NQ29O.tmp" /SL4 $90058 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2168282 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1680
- - C:\Program Files (x86)\PrintFolders\nyFolders.exe
    "C:\Program Files (x86)\PrintFolders\nyFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4928
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\t6lTMFpA8YGJYa.exe
      4⤵
      Executes dropped EXE
      PID:4904
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nyFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nyFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2124
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nyFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3168

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

nyFolders.exe

Path C:\Program Files (x86)\PrintFolders\nyFolders.exe
Size 3.4MB
SHA256 5b4f57af333d8cb0f87613c5ab5bcfab3462b53fd73c66e2f98bdbdad0899b65
MD5 9d9b08cf3f3fd44d5e155ae41db253f8
SHA1 c8a100cf715da403268d0f5b2e7a3c3140c44866
SHA512 82dcc372ee45a6d09cc507ba966c394bd7e814ddcd66db76fe80b84aefe2a08ea079897944f49aee90f3fab087e39fb8f99074c9c198262664fc83109a66a50e
SSDEEP 98304:YdhJ1RJoY5vfhy/SWVpNMkyh8x6UzJKWO3ldk:M1f+Ta133k
MD5 SHA1 SHA512 SSDEEP

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nyFolders.exe

Path C:\Program Files (x86)\PrintFolders\nyFolders.exe
Size 3.4MB
SHA256 5b4f57af333d8cb0f87613c5ab5bcfab3462b53fd73c66e2f98bdbdad0899b65
MD5 9d9b08cf3f3fd44d5e155ae41db253f8
SHA1 c8a100cf715da403268d0f5b2e7a3c3140c44866
SHA512 82dcc372ee45a6d09cc507ba966c394bd7e814ddcd66db76fe80b84aefe2a08ea079897944f49aee90f3fab087e39fb8f99074c9c198262664fc83109a66a50e
SSDEEP 98304:YdhJ1RJoY5vfhy/SWVpNMkyh8x6UzJKWO3ldk:M1f+Ta133k
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-MCTI6.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-NQ29O.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-VEGKC.tmp\is-NQ29O.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-NQ29O.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-VEGKC.tmp\is-NQ29O.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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t6lTMFpA8YGJYa.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\t6lTMFpA8YGJYa.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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t6lTMFpA8YGJYa.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\t6lTMFpA8YGJYa.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/4468-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4468-156-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4468-138-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/4928-144-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/4928-152-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/4928-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4928-143-0x0000000000400000-0x0000000001564000-memory.dmp

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memory/4928-155-0x0000000000400000-0x0000000001564000-memory.dmp

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