nymaim | f092d25ed680dea25e669c4ec031b218656c88024818b0007ceea59658967d73

Analysis

max time kernel
168s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
12/12/2022, 04:16

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General

Target
file.exe
Size 2.1MB
Sample221212-evspksac77
SHA256 f092d25ed680dea25e669c4ec031b218656c88024818b0007ceea59658967d73
MD5 829a5a03b8b79ba06f65642cf96d8a55
SHA1 08c77a6b7bce344950671c366e8a480052d782d4
SHA512 aafeb6d98bf93d5444a52153da0c0e9a7f6b6e5226891310e1b180bbae3c7ddd4e28ad7dc85f90a5e5014f36dc138ef8b741445b791ae635440e5c46eb8ccc1e
SSDEEP 49152:6Fm5/4g5c4lPankufeOx4AchCO57vxo62Dr0eve6FZvtaZ3:6Fm5/4dcyEHQv0evbLvta9
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
4044	is-QFHPL.tmp
2496	nwFolders.exe
1432	IOa0Xt1yyHCfyG.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	nwFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4044	is-QFHPL.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-6VKQJ.tmp	is-QFHPL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7KTNT.tmp	is-QFHPL.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-QFHPL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-N7M6D.tmp	is-QFHPL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-I0M6N.tmp	is-QFHPL.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nwFolders.exe	is-QFHPL.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-QFHPL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TPDCJ.tmp	is-QFHPL.tmp
File created	C:\Program Files (x86)\PrintFolders\is-ND4UP.tmp	is-QFHPL.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
1536	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2496	nwFolders.exe
2496	nwFolders.exe
2496	nwFolders.exe
2496	nwFolders.exe
2496	nwFolders.exe
2496	nwFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2496	nwFolders.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3484 wrote to memory of 4044	3484	file.exe	85
PID 3484 wrote to memory of 4044	3484	file.exe	85
PID 3484 wrote to memory of 4044	3484	file.exe	85
PID 4044 wrote to memory of 2496	4044	is-QFHPL.tmp	86
PID 4044 wrote to memory of 2496	4044	is-QFHPL.tmp	86
PID 4044 wrote to memory of 2496	4044	is-QFHPL.tmp	86
PID 2496 wrote to memory of 1432	2496	nwFolders.exe	87
PID 2496 wrote to memory of 1432	2496	nwFolders.exe	87
PID 2496 wrote to memory of 1432	2496	nwFolders.exe	87
PID 2496 wrote to memory of 736	2496	nwFolders.exe	98
PID 2496 wrote to memory of 736	2496	nwFolders.exe	98
PID 2496 wrote to memory of 736	2496	nwFolders.exe	98
PID 736 wrote to memory of 1536	736	cmd.exe	100
PID 736 wrote to memory of 1536	736	cmd.exe	100
PID 736 wrote to memory of 1536	736	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3484
- C:\Users\Admin\AppData\Local\Temp\is-M4TTJ.tmp\is-QFHPL.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-M4TTJ.tmp\is-QFHPL.tmp" /SL4 $8004C "C:\Users\Admin\AppData\Local\Temp\file.exe" 2001192 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4044
- - C:\Program Files (x86)\PrintFolders\nwFolders.exe
    "C:\Program Files (x86)\PrintFolders\nwFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:2496
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\IOa0Xt1yyHCfyG.exe
      4⤵
      Executes dropped EXE
      PID:1432
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nwFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nwFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:736
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nwFolders.exe" /f
        5⤵
        Kills process with taskkill
        
        PID:1536

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

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Downloads

nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.4MB
SHA256 44c24c5409603da30cf0a16eda7fa105885538fd98ba9454df5a485cc6b728c1
MD5 074bddbe5a9a45f587e85c5a42e627ba
SHA1 f2bd97ca1b9d63dacbe4d4f0edb165679a0a46ca
SHA512 98dd13ca3ec3edde89c2624ca56e2adaae92ce2a5741c01be0844aee71f0b5c6e06b9d7fa37a61b505b24aa23ade81ccd889190d3d20e954d465631aed4db482
SSDEEP 49152:xfpCHzQ+QkXkTStg2YUk/ASgbesk+sPbxm7f29XHS:xfpCHzQ+QkUTStrk/yesuPbxK29XS
MD5 SHA1 SHA512 SSDEEP

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nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.4MB
SHA256 44c24c5409603da30cf0a16eda7fa105885538fd98ba9454df5a485cc6b728c1
MD5 074bddbe5a9a45f587e85c5a42e627ba
SHA1 f2bd97ca1b9d63dacbe4d4f0edb165679a0a46ca
SHA512 98dd13ca3ec3edde89c2624ca56e2adaae92ce2a5741c01be0844aee71f0b5c6e06b9d7fa37a61b505b24aa23ade81ccd889190d3d20e954d465631aed4db482
SSDEEP 49152:xfpCHzQ+QkXkTStg2YUk/ASgbesk+sPbxm7f29XHS:xfpCHzQ+QkUTStrk/yesuPbxK29XS
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-BFR31.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-QFHPL.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-M4TTJ.tmp\is-QFHPL.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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is-QFHPL.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-M4TTJ.tmp\is-QFHPL.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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IOa0Xt1yyHCfyG.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\IOa0Xt1yyHCfyG.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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IOa0Xt1yyHCfyG.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\IOa0Xt1yyHCfyG.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/2496-142-0x0000000000400000-0x000000000155F000-memory.dmp

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memory/2496-144-0x0000000000400000-0x000000000155F000-memory.dmp

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memory/2496-143-0x0000000000400000-0x000000000155F000-memory.dmp

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memory/2496-148-0x0000000000400000-0x000000000155F000-memory.dmp

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memory/2496-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2496-155-0x0000000000400000-0x000000000155F000-memory.dmp

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memory/3484-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/3484-137-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/3484-156-0x0000000000400000-0x000000000041E000-memory.dmp

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