nymaim | bae2ea79c52d98b448fa29fd70efc08c223f0a8a243175108e4da9f2981f3c46

Analysis

max time kernel
146s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
22/11/2022, 17:32

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General

Target
file.exe
Size 1.2MB
Sample221122-v39wtseh6t
SHA256 bae2ea79c52d98b448fa29fd70efc08c223f0a8a243175108e4da9f2981f3c46
MD5 06487280b5b04265f3136de325a62f7e
SHA1 6d53f42ac44e00419af005b54fa64fa865a6ba30
SHA512 6c3cf6fe973cbc3d3624b4207218127c8f1548da5fbdbffd5fd33a1222e94f0956e08af26a50d1a71055a0a32801382894df0fbdb7379b59cff3d31995176e3f
SSDEEP 24576:ZizoKLJV4OcPeRvJ6vY8mdhTRlLLf9JgKl5SQXqR2UrEgZIY7eCLxYiI:SZVWmdf9Lf9JgKljq9NeViI
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
3500	is-NJJAT.tmp
452	PrintFolders.exe
204	kiQGE.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
3500	is-NJJAT.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-G3MHA.tmp	is-NJJAT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-33VK0.tmp	is-NJJAT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HOSVK.tmp	is-NJJAT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NJJAT.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-NJJAT.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NJJAT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4DJEP.tmp	is-NJJAT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KH5LQ.tmp	is-NJJAT.tmp
File created	C:\Program Files (x86)\PrintFolders\is-R97H2.tmp	is-NJJAT.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
3396	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
452	PrintFolders.exe
452	PrintFolders.exe
452	PrintFolders.exe
452	PrintFolders.exe
452	PrintFolders.exe
452	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
452	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3396	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 3500	2280	file.exe	80
PID 2280 wrote to memory of 3500	2280	file.exe	80
PID 2280 wrote to memory of 3500	2280	file.exe	80
PID 3500 wrote to memory of 452	3500	is-NJJAT.tmp	81
PID 3500 wrote to memory of 452	3500	is-NJJAT.tmp	81
PID 3500 wrote to memory of 452	3500	is-NJJAT.tmp	81
PID 452 wrote to memory of 204	452	PrintFolders.exe	82
PID 452 wrote to memory of 204	452	PrintFolders.exe	82
PID 452 wrote to memory of 204	452	PrintFolders.exe	82
PID 452 wrote to memory of 3336	452	PrintFolders.exe	90
PID 452 wrote to memory of 3336	452	PrintFolders.exe	90
PID 452 wrote to memory of 3336	452	PrintFolders.exe	90
PID 3336 wrote to memory of 3396	3336	cmd.exe	92
PID 3336 wrote to memory of 3396	3336	cmd.exe	92
PID 3336 wrote to memory of 3396	3336	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:2280
- C:\Users\Admin\AppData\Local\Temp\is-B3KLD.tmp\is-NJJAT.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-B3KLD.tmp\is-NJJAT.tmp" /SL4 $9002C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1058787 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3500
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:452
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\kiQGE.exe
      4⤵
      Executes dropped EXE
      PID:204
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3336
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3396

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.4MB
SHA256 f5362e7e6a0f9631ba668eac723dc7997fb4078bbcdd24342a10d58c8ac3f9b8
MD5 924ca7eb73adf782579c7eca315541c9
SHA1 e2765b26a7deff8ab7bc903625abe8c957d9c270
SHA512 c688250d5ac862c04ecbbc72f7be0c0c3f46242faeca2b46e97d9991691660312bd9fbedf5e7ff2f5ba856ceba976b3c639c1d0ed5b115c5ce2a111d0add03a3
SSDEEP 24576:U+sLlt+46+BR+8+rr+pK+9q+L0P7JojzZElJX6iyTl4F/rTgGQOoFfW3vxmsibKI:t8c4TBAlryt9jL27JojVOJXfyRMkbdOW
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.4MB
SHA256 f5362e7e6a0f9631ba668eac723dc7997fb4078bbcdd24342a10d58c8ac3f9b8
MD5 924ca7eb73adf782579c7eca315541c9
SHA1 e2765b26a7deff8ab7bc903625abe8c957d9c270
SHA512 c688250d5ac862c04ecbbc72f7be0c0c3f46242faeca2b46e97d9991691660312bd9fbedf5e7ff2f5ba856ceba976b3c639c1d0ed5b115c5ce2a111d0add03a3
SSDEEP 24576:U+sLlt+46+BR+8+rr+pK+9q+L0P7JojzZElJX6iyTl4F/rTgGQOoFfW3vxmsibKI:t8c4TBAlryt9jL27JojVOJXfyRMkbdOW
MD5 SHA1 SHA512 SSDEEP

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is-NJJAT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-B3KLD.tmp\is-NJJAT.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-NJJAT.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-B3KLD.tmp\is-NJJAT.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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kiQGE.exe

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

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\kiQGE.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/452-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/452-142-0x0000000000400000-0x0000000001373000-memory.dmp

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memory/452-143-0x0000000000400000-0x0000000001373000-memory.dmp

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memory/452-147-0x0000000000400000-0x0000000001373000-memory.dmp

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memory/452-154-0x0000000000400000-0x0000000001373000-memory.dmp

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memory/2280-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2280-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2280-155-0x0000000000400000-0x0000000000413000-memory.dmp

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