nymaim | 2463740a5c8dd040a02f30fe06bf3a9f31714b67e6d6592ff515ed0dfa13c196

Analysis

max time kernel
94s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
06/12/2022, 09:01

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General

Target
file.exe
Size 3.8MB
Sample221206-kywtasfd71
SHA256 2463740a5c8dd040a02f30fe06bf3a9f31714b67e6d6592ff515ed0dfa13c196
MD5 3910301fb489ed310314d7c12b5460d6
SHA1 8a6c011b4e7495bcad5ddd21d318185cfad8ea8d
SHA512 69ddf21bcc5d8f880719023696fad7e1a4970b832c6cea47663e51b4c9411ccfbe35a485e6b5a83f57f0e396e0ca185745ce02afe7cde552ef63af5a86d60285
SSDEEP 98304:KsFs/kkf2uygocW9IkL/Ic63wLvZXK9j3vpkn6aQ7aOU:Ekdb5LY3OJU3vPa2ax
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
1968	is-G7D3R.tmp
1652	PrintFolders.exe
4784	cAgXOs0rSq.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1968	is-G7D3R.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-2B6B4.tmp	is-G7D3R.tmp
File created	C:\Program Files (x86)\PrintFolders\is-USF3H.tmp	is-G7D3R.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-G7D3R.tmp
File created	C:\Program Files (x86)\PrintFolders\is-HQ323.tmp	is-G7D3R.tmp
File created	C:\Program Files (x86)\PrintFolders\is-24D0P.tmp	is-G7D3R.tmp
File created	C:\Program Files (x86)\PrintFolders\is-OPUOS.tmp	is-G7D3R.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6AIDH.tmp	is-G7D3R.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-G7D3R.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-G7D3R.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
4560	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1652	PrintFolders.exe
1652	PrintFolders.exe
1652	PrintFolders.exe
1652	PrintFolders.exe
1652	PrintFolders.exe
1652	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4560	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5028 wrote to memory of 1968	5028	file.exe	81
PID 5028 wrote to memory of 1968	5028	file.exe	81
PID 5028 wrote to memory of 1968	5028	file.exe	81
PID 1968 wrote to memory of 1652	1968	is-G7D3R.tmp	82
PID 1968 wrote to memory of 1652	1968	is-G7D3R.tmp	82
PID 1968 wrote to memory of 1652	1968	is-G7D3R.tmp	82
PID 1652 wrote to memory of 4784	1652	PrintFolders.exe	83
PID 1652 wrote to memory of 4784	1652	PrintFolders.exe	83
PID 1652 wrote to memory of 4784	1652	PrintFolders.exe	83
PID 1652 wrote to memory of 3516	1652	PrintFolders.exe	91
PID 1652 wrote to memory of 3516	1652	PrintFolders.exe	91
PID 1652 wrote to memory of 3516	1652	PrintFolders.exe	91
PID 3516 wrote to memory of 4560	3516	cmd.exe	93
PID 3516 wrote to memory of 4560	3516	cmd.exe	93
PID 3516 wrote to memory of 4560	3516	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5028
- C:\Users\Admin\AppData\Local\Temp\is-O9QRR.tmp\is-G7D3R.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-O9QRR.tmp\is-G7D3R.tmp" /SL4 $C003A "C:\Users\Admin\AppData\Local\Temp\file.exe" 3681525 96256
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1968
- - 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:1652
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\cAgXOs0rSq.exe
      4⤵
      Executes dropped EXE
      PID:4784
  - - 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:3516
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4560

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 6.2MB
SHA256 a0015c7ead12cc4b35144dc8e5e4ad3ef7396606b03364e8bd5754f5a6e6232a
MD5 b95fe8ad623fdd90cfbb3f57bb41150c
SHA1 1e6608cc191716bd1ef049e9c4477bd2ea5076bf
SHA512 8d1a08e6c696c3cc7fcaa0c119b33b2be527410cad277102718de4d431d2ac6dfd071c0542b0f62922f9c49c5eb3b5cae3190d4309ab19ac6ee6bcc2efe99c1d
SSDEEP 98304:DR/jd75PniyBESBbapl0GCSQFXs85FiYW18yozYqxNXCqf:DRB75FE++AGdgXXf
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.2MB
SHA256 a0015c7ead12cc4b35144dc8e5e4ad3ef7396606b03364e8bd5754f5a6e6232a
MD5 b95fe8ad623fdd90cfbb3f57bb41150c
SHA1 1e6608cc191716bd1ef049e9c4477bd2ea5076bf
SHA512 8d1a08e6c696c3cc7fcaa0c119b33b2be527410cad277102718de4d431d2ac6dfd071c0542b0f62922f9c49c5eb3b5cae3190d4309ab19ac6ee6bcc2efe99c1d
SSDEEP 98304:DR/jd75PniyBESBbapl0GCSQFXs85FiYW18yozYqxNXCqf:DRB75FE++AGdgXXf
MD5 SHA1 SHA512 SSDEEP

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is-G7D3R.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-O9QRR.tmp\is-G7D3R.tmp
Size 687KB
SHA256 cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2
MD5 075f33da1ee1e9c480243cac029b3c3e
SHA1 496cba41dd1b8878f7e10c3affb293231ca97ed3
SHA512 3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv6jfxOM:y5NoqWolrP837JzHvA6yknyWFxvwxOM
MD5 SHA1 SHA512 SSDEEP

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is-G7D3R.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-O9QRR.tmp\is-G7D3R.tmp
Size 687KB
SHA256 cec47d181cf1dad856463fc237ead179ffa5ab1f2aeeec442a99ee83c7db5cb2
MD5 075f33da1ee1e9c480243cac029b3c3e
SHA1 496cba41dd1b8878f7e10c3affb293231ca97ed3
SHA512 3c90572fa0151a9c1d557109f995f2093b9a043808675bd6ff6fd543bf364d826be04d0dfd60062670e4e8edb8f7b24f8bbd5a5f056c3f628aacf2175c3fe8db
SSDEEP 12288:gh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv6jfxOM:y5NoqWolrP837JzHvA6yknyWFxvwxOM
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-UA7LD.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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cAgXOs0rSq.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\cAgXOs0rSq.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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cAgXOs0rSq.exe

Path C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\cAgXOs0rSq.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/1652-146-0x0000000000400000-0x0000000001840000-memory.dmp

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memory/1652-145-0x0000000000400000-0x0000000001840000-memory.dmp

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memory/1652-150-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1652-154-0x0000000000400000-0x0000000001840000-memory.dmp

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memory/1652-156-0x0000000000400000-0x0000000001840000-memory.dmp

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memory/5028-135-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/5028-140-0x0000000000400000-0x000000000041E000-memory.dmp

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memory/5028-158-0x0000000000400000-0x000000000041E000-memory.dmp

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