nymaim | 7cb4db450b9a45b77d0913c1a35ff79a68985b114e89e3497b236a9b5d1e55dc

Analysis

max time kernel
65s
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
13/12/2022, 18:01

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General

Target
file.exe
Size 2.4MB
Sample221213-wlwhjsfc93
SHA256 7cb4db450b9a45b77d0913c1a35ff79a68985b114e89e3497b236a9b5d1e55dc
MD5 3640cded167e3c2243fe0b08134557cb
SHA1 7093f0b3531546b13288738e150b226a0a7a8493
SHA512 c41eb315064890914054091e92e9505c9e6e379546957feccbf1a98d0227fe9999c75761a7c57199f89b35e52743c754793cfbaeb26036aeb27b190fcce0f2a6
SSDEEP 49152:xLMIa8iPvJyKDzZrNATdvzcBuX41iAMcCCb3SmjuSjY/5Epyz6vPosQz:xLMz71DzZrGpzcBuX41iAdCE3S3DEpyj
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
2524	is-Q25UT.tmp
5056	nxFolders.exe
4916	ZyLScVqgBbaC.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	nxFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2524	is-Q25UT.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-6MF8J.tmp	is-Q25UT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-SED1C.tmp	is-Q25UT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-L4OVG.tmp	is-Q25UT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nxFolders.exe	is-Q25UT.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-Q25UT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9OG1C.tmp	is-Q25UT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-91K33.tmp	is-Q25UT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-BG44R.tmp	is-Q25UT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-Q25UT.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
3672	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5056	nxFolders.exe
5056	nxFolders.exe
5056	nxFolders.exe
5056	nxFolders.exe
5056	nxFolders.exe
5056	nxFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3672	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 528 wrote to memory of 2524	528	file.exe	80
PID 528 wrote to memory of 2524	528	file.exe	80
PID 528 wrote to memory of 2524	528	file.exe	80
PID 2524 wrote to memory of 5056	2524	is-Q25UT.tmp	81
PID 2524 wrote to memory of 5056	2524	is-Q25UT.tmp	81
PID 2524 wrote to memory of 5056	2524	is-Q25UT.tmp	81
PID 5056 wrote to memory of 4916	5056	nxFolders.exe	82
PID 5056 wrote to memory of 4916	5056	nxFolders.exe	82
PID 5056 wrote to memory of 4916	5056	nxFolders.exe	82
PID 5056 wrote to memory of 3492	5056	nxFolders.exe	90
PID 5056 wrote to memory of 3492	5056	nxFolders.exe	90
PID 5056 wrote to memory of 3492	5056	nxFolders.exe	90
PID 3492 wrote to memory of 3672	3492	cmd.exe	92
PID 3492 wrote to memory of 3672	3492	cmd.exe	92
PID 3492 wrote to memory of 3672	3492	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:528
- C:\Users\Admin\AppData\Local\Temp\is-NC8L1.tmp\is-Q25UT.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-NC8L1.tmp\is-Q25UT.tmp" /SL4 $801C4 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2227579 170496
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2524
- - C:\Program Files (x86)\PrintFolders\nxFolders.exe
    "C:\Program Files (x86)\PrintFolders\nxFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:5056
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\ZyLScVqgBbaC.exe
      4⤵
      Executes dropped EXE
      PID:4916
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nxFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nxFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3492
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nxFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3672

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

nxFolders.exe

Path C:\Program Files (x86)\PrintFolders\nxFolders.exe
Size 3.5MB
SHA256 cae5d412b80ea21fff11989f4c85e9550c682b34a78319fc8558b46ca26d65e1
MD5 7ade761db36e30ab4f39f7f04f208d47
SHA1 96fa281ab510c84227d505eaa1008326fbc37cce
SHA512 356d201ccb1efca89ec5add986f2047dca64b656641b6de0053c0684c9e71f6d3a0a37ac2f3e64678c43fcc8ff64650e2134fed298434ac4b99cfc35cb1a6fa0
SSDEEP 98304:3lxadP8kcRVfAMQay7i25SIO/L49ElGAIs3O4fto9:NffH8ElC
MD5 SHA1 SHA512 SSDEEP

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nxFolders.exe

Path C:\Program Files (x86)\PrintFolders\nxFolders.exe
Size 3.5MB
SHA256 cae5d412b80ea21fff11989f4c85e9550c682b34a78319fc8558b46ca26d65e1
MD5 7ade761db36e30ab4f39f7f04f208d47
SHA1 96fa281ab510c84227d505eaa1008326fbc37cce
SHA512 356d201ccb1efca89ec5add986f2047dca64b656641b6de0053c0684c9e71f6d3a0a37ac2f3e64678c43fcc8ff64650e2134fed298434ac4b99cfc35cb1a6fa0
SSDEEP 98304:3lxadP8kcRVfAMQay7i25SIO/L49ElGAIs3O4fto9:NffH8ElC
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-F6HJ3.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-Q25UT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-NC8L1.tmp\is-Q25UT.tmp
Size 760KB
SHA256 f92bcd82630801e6015811bd7c19b8392b9cb80c476b40a50f5c38b6a79634d7
MD5 8586221a52b8c9c25d579b5bd6e5a2ad
SHA1 8b8167f74e4a2e6885bf54ee904e9195cf51a6c1
SHA512 6225c56f72a6b5bf4a1f0623030a473344c4b6452a3e05aa87145aefe03286ee3096c62148196f4f016bba5848138a1933287eda5b59bcd6657c3bf1e40ce8d2
SSDEEP 12288:Nh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvSmLN9MHHxOw:z5NoqWolrP837JzHvA6yknyWFxvzMHHV
MD5 SHA1 SHA512 SSDEEP

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is-Q25UT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-NC8L1.tmp\is-Q25UT.tmp
Size 760KB
SHA256 f92bcd82630801e6015811bd7c19b8392b9cb80c476b40a50f5c38b6a79634d7
MD5 8586221a52b8c9c25d579b5bd6e5a2ad
SHA1 8b8167f74e4a2e6885bf54ee904e9195cf51a6c1
SHA512 6225c56f72a6b5bf4a1f0623030a473344c4b6452a3e05aa87145aefe03286ee3096c62148196f4f016bba5848138a1933287eda5b59bcd6657c3bf1e40ce8d2
SSDEEP 12288:Nh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvSmLN9MHHxOw:z5NoqWolrP837JzHvA6yknyWFxvzMHHV
MD5 SHA1 SHA512 SSDEEP

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ZyLScVqgBbaC.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\ZyLScVqgBbaC.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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ZyLScVqgBbaC.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\ZyLScVqgBbaC.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/528-156-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/528-138-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/528-132-0x0000000000400000-0x0000000000430000-memory.dmp

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memory/5056-143-0x0000000000400000-0x000000000158B000-memory.dmp

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memory/5056-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/5056-152-0x0000000000400000-0x000000000158B000-memory.dmp

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memory/5056-144-0x0000000000400000-0x000000000158B000-memory.dmp

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memory/5056-142-0x0000000000400000-0x000000000158B000-memory.dmp

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memory/5056-155-0x0000000000400000-0x000000000158B000-memory.dmp

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