nymaim | 1a561c773b702d46a5136233cbdde4ed17cbc1621b1025ca49c668df7ec540de

Analysis

max time kernel
75s
max time network
78s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
07/10/2022, 03:15

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General

Target
file.exe
Size 396KB
Sample221007-drw26abdf7
SHA256 1a561c773b702d46a5136233cbdde4ed17cbc1621b1025ca49c668df7ec540de
MD5 51a76a4caa19451877bfb75685947c67
SHA1 f85a3d259779fda536a707f296f02a286a4e000d
SHA512 d5537d8b48f5da60f10ab32546fdfc40aa66460e94a0d263c4fce550771caabe5b2f98a359e938ddca6b5e1f925136e2222830f1e187b0aa2c43e120fb471fd9
SSDEEP 6144:GJ6Lfeag3k1FxUrPlzYS1kY2s7VvXkuzbgwuQSFXwVfU:GwjdUrP1hkqJXkunnZud
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
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 1 IoCs

pid	Process
1772	gc5RZjZkMUzT.exe

Deletes itself 1 IoCs

pid	Process
1484	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1788	file.exe

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
1672	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1788	file.exe
1788	file.exe
1788	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1672	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1788 wrote to memory of 1772	1788	file.exe	29
PID 1788 wrote to memory of 1772	1788	file.exe	29
PID 1788 wrote to memory of 1772	1788	file.exe	29
PID 1788 wrote to memory of 1772	1788	file.exe	29
PID 1788 wrote to memory of 1484	1788	file.exe	30
PID 1788 wrote to memory of 1484	1788	file.exe	30
PID 1788 wrote to memory of 1484	1788	file.exe	30
PID 1788 wrote to memory of 1484	1788	file.exe	30
PID 1484 wrote to memory of 1672	1484	cmd.exe	32
PID 1484 wrote to memory of 1672	1484	cmd.exe	32
PID 1484 wrote to memory of 1672	1484	cmd.exe	32
PID 1484 wrote to memory of 1672	1484	cmd.exe	32

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\gc5RZjZkMUzT.exe
  2⤵
  - Executes dropped EXE
  PID:1772
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1484
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1672

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

gc5RZjZkMUzT.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\gc5RZjZkMUzT.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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gc5RZjZkMUzT.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\gc5RZjZkMUzT.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/1788-55-0x000000000056B000-0x000000000059C000-memory.dmp

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memory/1788-54-0x00000000761F1000-0x00000000761F3000-memory.dmp

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memory/1788-61-0x000000000056B000-0x000000000059C000-memory.dmp

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memory/1788-62-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/1788-63-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1788-57-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/1788-68-0x000000000056B000-0x000000000059C000-memory.dmp

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memory/1788-69-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/1788-56-0x00000000002D0000-0x0000000000323000-memory.dmp

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