nymaim | 941f76ea7c2ad17b2233eb8cc584841e25f40bd3ed2ee3cd818a58e380f9b18a

Analysis

max time kernel
82s
max time network
136s
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, 11:03

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General

Target
file.exe
Size 2.4MB
Sample221212-m5n35sbb73
SHA256 941f76ea7c2ad17b2233eb8cc584841e25f40bd3ed2ee3cd818a58e380f9b18a
MD5 338650c7b6368f3ce8d56d4281ed19ce
SHA1 3c7390c8651ab708b50f9b10e28e3bbb123e0a1c
SHA512 21db0b99f5fd861e380c8d4ce9ecfac5301d85d0f51ff35452d29708327d3fc900fa80862ec8f38337de68d8b4b217adf8d99766a9964b668862a74ec09070d2
SSDEEP 49152:KFl85Qea2dciMMMiPUsbeEjgViGdT1Okl9hmy7zKsDf5lUFLZw:KFO5QeagXMcPR4yk5mGLUBa
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
4572	is-2NDNS.tmp
3528	nwFolders.exe
1268	2IDxxnErgmu7UA.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
4572	is-2NDNS.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-8BGN8.tmp	is-2NDNS.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nwFolders.exe	is-2NDNS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-ACO5D.tmp	is-2NDNS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1ORPF.tmp	is-2NDNS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-O8E00.tmp	is-2NDNS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-MVHBT.tmp	is-2NDNS.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2NDNS.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-2NDNS.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6O4JL.tmp	is-2NDNS.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
3572	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3528	nwFolders.exe
3528	nwFolders.exe
3528	nwFolders.exe
3528	nwFolders.exe
3528	nwFolders.exe
3528	nwFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3572	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 4572	4988	file.exe	85
PID 4988 wrote to memory of 4572	4988	file.exe	85
PID 4988 wrote to memory of 4572	4988	file.exe	85
PID 4572 wrote to memory of 3528	4572	is-2NDNS.tmp	86
PID 4572 wrote to memory of 3528	4572	is-2NDNS.tmp	86
PID 4572 wrote to memory of 3528	4572	is-2NDNS.tmp	86
PID 3528 wrote to memory of 1268	3528	nwFolders.exe	87
PID 3528 wrote to memory of 1268	3528	nwFolders.exe	87
PID 3528 wrote to memory of 1268	3528	nwFolders.exe	87
PID 3528 wrote to memory of 940	3528	nwFolders.exe	95
PID 3528 wrote to memory of 940	3528	nwFolders.exe	95
PID 3528 wrote to memory of 940	3528	nwFolders.exe	95
PID 940 wrote to memory of 3572	940	cmd.exe	97
PID 940 wrote to memory of 3572	940	cmd.exe	97
PID 940 wrote to memory of 3572	940	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4988
- C:\Users\Admin\AppData\Local\Temp\is-T76SJ.tmp\is-2NDNS.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-T76SJ.tmp\is-2NDNS.tmp" /SL4 $901DA "C:\Users\Admin\AppData\Local\Temp\file.exe" 2230650 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4572
- - 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 use of WriteProcessMemory
    PID:3528
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\2IDxxnErgmu7UA.exe
      4⤵
      Executes dropped EXE
      PID:1268
  - - 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:940
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nwFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3572

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 3.6MB
SHA256 4baffb5f949ae860145c253ac08ff823b877206017b68d1fb06f78edfed7790d
MD5 a4256c42cf8f39a71db2bfa174fdfed3
SHA1 f9888a9c935e277ea6bf317f4429b9d9055a8be0
SHA512 8118a97afeaade9fe35fa4ab9ea8e8ad15710cf944c8dd377566296cd0e6e1c45f824c3059972a778b806c6cd05150cdcc052e74cfd1a0f4ab0a2d10b080209a
SSDEEP 98304:y2Sos0mS2TSeY2d/+Fm4nM72TL86lgdjy3U:su844N
MD5 SHA1 SHA512 SSDEEP

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nwFolders.exe

Path C:\Program Files (x86)\PrintFolders\nwFolders.exe
Size 3.6MB
SHA256 4baffb5f949ae860145c253ac08ff823b877206017b68d1fb06f78edfed7790d
MD5 a4256c42cf8f39a71db2bfa174fdfed3
SHA1 f9888a9c935e277ea6bf317f4429b9d9055a8be0
SHA512 8118a97afeaade9fe35fa4ab9ea8e8ad15710cf944c8dd377566296cd0e6e1c45f824c3059972a778b806c6cd05150cdcc052e74cfd1a0f4ab0a2d10b080209a
SSDEEP 98304:y2Sos0mS2TSeY2d/+Fm4nM72TL86lgdjy3U:su844N
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-LP3IP.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-2NDNS.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-T76SJ.tmp\is-2NDNS.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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is-2NDNS.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-T76SJ.tmp\is-2NDNS.tmp
Size 687KB
SHA256 b5060a812c76a050304de3fd25542775644a816a1ea4d36f9c850106fb2e7452
MD5 6b9249ef93da4e9eeaec3a23ba930ea7
SHA1 f9e9d433c638356d4e6bb5b14a93a37abd0ac345
SHA512 ac4797bb3035dc10c85161acea00390c93918da0376d514b6fc047c86bb4cc55e6d084b15f6dbfe9f10bee339eaa70fee3d30d1a0060cbc97e642e0e6485e85b
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvgXxOM:y5NoqWolrP837JzHvA6yknyWFxvgXxOM
MD5 SHA1 SHA512 SSDEEP

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2IDxxnErgmu7UA.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\2IDxxnErgmu7UA.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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2IDxxnErgmu7UA.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\2IDxxnErgmu7UA.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/3528-142-0x0000000000400000-0x0000000001591000-memory.dmp

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memory/3528-141-0x0000000000400000-0x0000000001591000-memory.dmp

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memory/3528-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3528-151-0x0000000000400000-0x0000000001591000-memory.dmp

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memory/3528-154-0x0000000000400000-0x0000000001591000-memory.dmp

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memory/4988-132-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4988-150-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/4988-155-0x0000000000400000-0x000000000041E000-memory.dmp

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