nymaim | 4d9fbef8dbf505ce116fc43c6e2b16076324c9c8523de9f0439991bfcc09b687

Analysis

max time kernel
52s
max time network
55s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
07/10/2022, 08:11

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General

Target
file.exe
Size 396KB
Sample221007-j29znacbdl
SHA256 4d9fbef8dbf505ce116fc43c6e2b16076324c9c8523de9f0439991bfcc09b687
MD5 8fb921d71eef0d106f4ca92b665bd6dc
SHA1 3403a3dd3f88f7b4c6ecb21b2a19e1a951d789b8
SHA512 84c50731fbd916c6b66065e164c8faec36c11b5883fce492fdd98d56906b6a5712c8fddf9b56a6cea1fd8a440d605a24ddb8dc97b0ed95a048e36bb6260cf28b
SSDEEP 6144:FsiqJuVU68vY2ZgJQVxSF0AyUIoQ1Cwwf0CRwrzpm/FqcLuzbgwukQwVfU:F1I6v8AMOF0NoQ1vwf0CGmunnD4
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
548	4flFLdX3Bpq5.exe

Deletes itself 1 IoCs

pid	Process
108	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
2020	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
1496	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2020	file.exe
2020	file.exe
2020	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1496	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 548	2020	file.exe	30
PID 2020 wrote to memory of 548	2020	file.exe	30
PID 2020 wrote to memory of 548	2020	file.exe	30
PID 2020 wrote to memory of 548	2020	file.exe	30
PID 2020 wrote to memory of 108	2020	file.exe	31
PID 2020 wrote to memory of 108	2020	file.exe	31
PID 2020 wrote to memory of 108	2020	file.exe	31
PID 2020 wrote to memory of 108	2020	file.exe	31
PID 108 wrote to memory of 1496	108	cmd.exe	33
PID 108 wrote to memory of 1496	108	cmd.exe	33
PID 108 wrote to memory of 1496	108	cmd.exe	33
PID 108 wrote to memory of 1496	108	cmd.exe	33

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:2020
- C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\4flFLdX3Bpq5.exe
  2⤵
  - Executes dropped EXE
  PID:548
- 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:108
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1496

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

4flFLdX3Bpq5.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\4flFLdX3Bpq5.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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4flFLdX3Bpq5.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\4flFLdX3Bpq5.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/2020-55-0x00000000002CB000-0x00000000002FC000-memory.dmp

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memory/2020-54-0x00000000756B1000-0x00000000756B3000-memory.dmp

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memory/2020-61-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/2020-65-0x00000000002CB000-0x00000000002FC000-memory.dmp

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memory/2020-66-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/2020-56-0x0000000001C00000-0x0000000001C53000-memory.dmp

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memory/2020-68-0x00000000002CB000-0x00000000002FC000-memory.dmp

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memory/2020-69-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/2020-57-0x0000000000400000-0x0000000000468000-memory.dmp

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