nymaim | 6f18a807585a04f49c2ab4c5f472dfead0ef686640afbd4223b9e0c1cf33e8db

Analysis

max time kernel
123s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
21/11/2022, 06:02

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General

Target
file.exe
Size 1.4MB
Sample221121-grf8gsef29
SHA256 6f18a807585a04f49c2ab4c5f472dfead0ef686640afbd4223b9e0c1cf33e8db
MD5 d63d6a049f9e7a2dadb0837ca91204fd
SHA1 d549da3f21263b16ac33a7948ca958ac0399db78
SHA512 89e422f4385d4dc3d0d508f8325c86515c5f365e9bf19cb2ae0a2335834037f5d968b87464648d849da9c2aa5bfa65b2f237e316bf1d9efd685cdc79753bea17
SSDEEP 24576:BizxpHQKc66cbjla+SdPYOIH+xAo4k+VKs5A2LgqSqsBMxJBD2uCA8rgZIY7eCLD:qbHrScvIlOEaI+VuFFYJBSuCA8UNeVid
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
4620	is-JF8NQ.tmp
3148	PrintFolders.exe
2548	aqvycN8ypoFoLP.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4620	is-JF8NQ.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-S1QU1.tmp	is-JF8NQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-F8H8H.tmp	is-JF8NQ.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-JF8NQ.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-JF8NQ.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-JF8NQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-19VFB.tmp	is-JF8NQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AB7CJ.tmp	is-JF8NQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HMR73.tmp	is-JF8NQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HS3KR.tmp	is-JF8NQ.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
2284	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3148	PrintFolders.exe
3148	PrintFolders.exe
3148	PrintFolders.exe
3148	PrintFolders.exe
3148	PrintFolders.exe
3148	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3148	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 432 wrote to memory of 4620	432	file.exe	83
PID 432 wrote to memory of 4620	432	file.exe	83
PID 432 wrote to memory of 4620	432	file.exe	83
PID 4620 wrote to memory of 3148	4620	is-JF8NQ.tmp	84
PID 4620 wrote to memory of 3148	4620	is-JF8NQ.tmp	84
PID 4620 wrote to memory of 3148	4620	is-JF8NQ.tmp	84
PID 3148 wrote to memory of 2548	3148	PrintFolders.exe	85
PID 3148 wrote to memory of 2548	3148	PrintFolders.exe	85
PID 3148 wrote to memory of 2548	3148	PrintFolders.exe	85
PID 3148 wrote to memory of 712	3148	PrintFolders.exe	103
PID 3148 wrote to memory of 712	3148	PrintFolders.exe	103
PID 3148 wrote to memory of 712	3148	PrintFolders.exe	103
PID 712 wrote to memory of 2284	712	cmd.exe	105
PID 712 wrote to memory of 2284	712	cmd.exe	105
PID 712 wrote to memory of 2284	712	cmd.exe	105

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:432
- C:\Users\Admin\AppData\Local\Temp\is-O3NJV.tmp\is-JF8NQ.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-O3NJV.tmp\is-JF8NQ.tmp" /SL4 $D0182 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1269528 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4620
- - 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:3148
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\aqvycN8ypoFoLP.exe
      4⤵
      Executes dropped EXE
      PID:2548
  - - 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:712
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2284

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 a6f41887dd273e61724f929f73b87dbb0905f1abdea999059f77a04009ef7997
MD5 aba2f7f40b31635132cf0efd7209d6a3
SHA1 1667153ade663aab8be25138662d847e3628e607
SHA512 14b9cbe0297f62734d78b3b51f2dcbc7909647ed0162cc213d58b4b82370ccb0b64cad4a52dcb431a77e7f24e51a0703bb905de3520d48ec7881eec736e4cfd6
SSDEEP 24576:g+OF+++K+V+Jtp9+/+M+eP2ltAPro3zLDbvboPBCK1qBdiodrcpMZ29A5b2QKAw:pOknDUb+mVVltFLn0PBCK1qBphR4
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.7MB
SHA256 a6f41887dd273e61724f929f73b87dbb0905f1abdea999059f77a04009ef7997
MD5 aba2f7f40b31635132cf0efd7209d6a3
SHA1 1667153ade663aab8be25138662d847e3628e607
SHA512 14b9cbe0297f62734d78b3b51f2dcbc7909647ed0162cc213d58b4b82370ccb0b64cad4a52dcb431a77e7f24e51a0703bb905de3520d48ec7881eec736e4cfd6
SSDEEP 24576:g+OF+++K+V+Jtp9+/+M+eP2ltAPro3zLDbvboPBCK1qBdiodrcpMZ29A5b2QKAw:pOknDUb+mVVltFLn0PBCK1qBphR4
MD5 SHA1 SHA512 SSDEEP

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is-JF8NQ.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-O3NJV.tmp\is-JF8NQ.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-JF8NQ.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-O3NJV.tmp\is-JF8NQ.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-RKOKV.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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aqvycN8ypoFoLP.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\aqvycN8ypoFoLP.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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aqvycN8ypoFoLP.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\aqvycN8ypoFoLP.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/432-157-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/432-148-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/432-133-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/3148-144-0x0000000000400000-0x00000000013B1000-memory.dmp

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memory/3148-143-0x0000000000400000-0x00000000013B1000-memory.dmp

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memory/3148-149-0x0000000000400000-0x00000000013B1000-memory.dmp

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memory/3148-150-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3148-142-0x0000000000400000-0x00000000013B1000-memory.dmp

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memory/3148-156-0x0000000000400000-0x00000000013B1000-memory.dmp

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