nymaim | 266e5b9dc714d3e25047372c0fffc8949c7c1df98fcb398baa731a6d6087b52d

Analysis

max time kernel
133s
max time network
152s
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, 04:47

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General

Target
file.exe
Size 1.3MB
Sample221122-fejbmsaf39
SHA256 266e5b9dc714d3e25047372c0fffc8949c7c1df98fcb398baa731a6d6087b52d
MD5 6d0360645d2eef429b993bf15482fd73
SHA1 5266d09cd36ad09a9295fac45d9a0a1ca75318ce
SHA512 f8adec757ca6182910eb8a8660fc9e31814a25bf12ab1da6d5aa602ad8c89807198b63cf962e78d701ba7f3bab78dcad9a4f9e4721f728b6d98de80a01532ea2
SSDEEP 24576:9izIKniDBegtUFJQwGXJKWUTjaJpL1s0oiU7Zfa5DPG/lj1WegZIY7eCLxYiz:WIKiDNUFJDSUPaJpL1i7MCN1WRNeViz
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
3132	is-9B3BB.tmp
4868	PrintFolders.exe
3444	qYG9oB4Y0eXGg.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
3132	is-9B3BB.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-R8389.tmp	is-9B3BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-CUUA7.tmp	is-9B3BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-THE78.tmp	is-9B3BB.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-9B3BB.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-9B3BB.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-9B3BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-T66AK.tmp	is-9B3BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6SQ3K.tmp	is-9B3BB.tmp
File created	C:\Program Files (x86)\PrintFolders\is-T3R2R.tmp	is-9B3BB.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
884	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4868	PrintFolders.exe
4868	PrintFolders.exe
4868	PrintFolders.exe
4868	PrintFolders.exe
4868	PrintFolders.exe
4868	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	884	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4904 wrote to memory of 3132	4904	file.exe	82
PID 4904 wrote to memory of 3132	4904	file.exe	82
PID 4904 wrote to memory of 3132	4904	file.exe	82
PID 3132 wrote to memory of 4868	3132	is-9B3BB.tmp	83
PID 3132 wrote to memory of 4868	3132	is-9B3BB.tmp	83
PID 3132 wrote to memory of 4868	3132	is-9B3BB.tmp	83
PID 4868 wrote to memory of 3444	4868	PrintFolders.exe	84
PID 4868 wrote to memory of 3444	4868	PrintFolders.exe	84
PID 4868 wrote to memory of 3444	4868	PrintFolders.exe	84
PID 4868 wrote to memory of 640	4868	PrintFolders.exe	86
PID 4868 wrote to memory of 640	4868	PrintFolders.exe	86
PID 4868 wrote to memory of 640	4868	PrintFolders.exe	86
PID 640 wrote to memory of 884	640	cmd.exe	88
PID 640 wrote to memory of 884	640	cmd.exe	88
PID 640 wrote to memory of 884	640	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4904
- C:\Users\Admin\AppData\Local\Temp\is-9JE0M.tmp\is-9B3BB.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-9JE0M.tmp\is-9B3BB.tmp" /SL4 $80044 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1097323 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3132
- - 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 use of WriteProcessMemory
    PID:4868
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\qYG9oB4Y0eXGg.exe
      4⤵
      Executes dropped EXE
      PID:3444
  - - 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:640
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:884

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 1.5MB
SHA256 da41979cff9c0739694cf84fbab4e878844892add3490fa87162939671016d2d
MD5 cbc9adfb931dc65fd388eafa197370bf
SHA1 9df6dd5893dbb6eddd37b6da3f308da4a7beb564
SHA512 681e40b4407516fb9165590a193973f24be1638f5d92914c9161a51040df15f7edc3e4ec8bbe4b62dd86c86fbd02d24dfba69ef4c0300c515e4ffc7b83918196
SSDEEP 24576:V+jaCr+Ym+f+/+H+v9T+J+OIMMeQzpj+Ou/G48oq5Wp2oS6ZNFglxwJS5qP:UG9AGmeUIx1ebOu/Cod5LFglG3P
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.5MB
SHA256 da41979cff9c0739694cf84fbab4e878844892add3490fa87162939671016d2d
MD5 cbc9adfb931dc65fd388eafa197370bf
SHA1 9df6dd5893dbb6eddd37b6da3f308da4a7beb564
SHA512 681e40b4407516fb9165590a193973f24be1638f5d92914c9161a51040df15f7edc3e4ec8bbe4b62dd86c86fbd02d24dfba69ef4c0300c515e4ffc7b83918196
SSDEEP 24576:V+jaCr+Ym+f+/+H+v9T+J+OIMMeQzpj+Ou/G48oq5Wp2oS6ZNFglxwJS5qP:UG9AGmeUIx1ebOu/Cod5LFglG3P
MD5 SHA1 SHA512 SSDEEP

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is-9B3BB.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9JE0M.tmp\is-9B3BB.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

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is-9B3BB.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-9JE0M.tmp\is-9B3BB.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-FJQQ9.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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qYG9oB4Y0eXGg.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\qYG9oB4Y0eXGg.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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qYG9oB4Y0eXGg.exe

Path C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\qYG9oB4Y0eXGg.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/4868-151-0x0000000000400000-0x0000000001378000-memory.dmp

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memory/4868-143-0x0000000000400000-0x0000000001378000-memory.dmp

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memory/4868-142-0x0000000000400000-0x0000000001378000-memory.dmp

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memory/4868-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4868-154-0x0000000000400000-0x0000000001378000-memory.dmp

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memory/4904-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4904-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/4904-155-0x0000000000400000-0x0000000000413000-memory.dmp

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