nymaim | 85ce27fe2a189b1f7bc034e80bba9f1877a70a10b93d35f9e774f5b7e201aeb3

Analysis

max time kernel
138s
max time network
141s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
30/09/2022, 08:19

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General

Target
file.exe
Size 230KB
Sample220930-j7t6dsdac2
SHA256 85ce27fe2a189b1f7bc034e80bba9f1877a70a10b93d35f9e774f5b7e201aeb3
MD5 b41088df9cdfe9bf99ce53024a74a12b
SHA1 d945116b9ddb283a473d9273899f92272a86bc9d
SHA512 3f7d3638e3abc1b716eb6da6658dea25ac76a8ee81e15aedb176c56038d377d3880713b727c5db8be28d83dc40d849cabd97777c0383f0db01365042e5af85be
SSDEEP 6144:4rBV9n3btGkPHlBIvkgnEzXJKyGp5/0jH/nh:wBLBGkPb6S5KyGj07/h
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
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1864	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
328	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1340	cmd.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1936	1864	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
1532	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1932	file.exe
1932	file.exe
1932	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1932	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1864	Cleaner.exe
Token: SeDebugPrivilege	1532	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1932 wrote to memory of 1340	1932	file.exe	30
PID 1932 wrote to memory of 1340	1932	file.exe	30
PID 1932 wrote to memory of 1340	1932	file.exe	30
PID 1932 wrote to memory of 1340	1932	file.exe	30
PID 1340 wrote to memory of 1864	1340	cmd.exe	32
PID 1340 wrote to memory of 1864	1340	cmd.exe	32
PID 1340 wrote to memory of 1864	1340	cmd.exe	32
PID 1340 wrote to memory of 1864	1340	cmd.exe	32
PID 1864 wrote to memory of 1936	1864	Cleaner.exe	34
PID 1864 wrote to memory of 1936	1864	Cleaner.exe	34
PID 1864 wrote to memory of 1936	1864	Cleaner.exe	34
PID 1932 wrote to memory of 328	1932	file.exe	35
PID 1932 wrote to memory of 328	1932	file.exe	35
PID 1932 wrote to memory of 328	1932	file.exe	35
PID 1932 wrote to memory of 328	1932	file.exe	35
PID 328 wrote to memory of 1532	328	cmd.exe	37
PID 328 wrote to memory of 1532	328	cmd.exe	37
PID 328 wrote to memory of 1532	328	cmd.exe	37
PID 328 wrote to memory of 1532	328	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1932
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\pigecQq2sNa2Lb8OkCJe9hrxUc9T\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1340
- - C:\Users\Admin\AppData\Local\Temp\pigecQq2sNa2Lb8OkCJe9hrxUc9T\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\pigecQq2sNa2Lb8OkCJe9hrxUc9T\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1864
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1864 -s 1152
      4⤵
      Program crash
      PID:1936
- 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:328
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1532

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\pigecQq2sNa2Lb8OkCJe9hrxUc9T\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\pigecQq2sNa2Lb8OkCJe9hrxUc9T\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\pigecQq2sNa2Lb8OkCJe9hrxUc9T\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\pigecQq2sNa2Lb8OkCJe9hrxUc9T\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/1864-65-0x0000000000AF0000-0x0000000000C48000-memory.dmp

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memory/1864-68-0x00000000008E0000-0x0000000000922000-memory.dmp

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memory/1864-66-0x000007FEFB7B1000-0x000007FEFB7B3000-memory.dmp

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memory/1932-59-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/1932-54-0x0000000075981000-0x0000000075983000-memory.dmp

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memory/1932-58-0x000000000074B000-0x0000000000772000-memory.dmp

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memory/1932-55-0x000000000074B000-0x0000000000772000-memory.dmp

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memory/1932-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1932-57-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/1932-75-0x000000000074B000-0x0000000000772000-memory.dmp

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memory/1932-76-0x0000000000400000-0x0000000000597000-memory.dmp

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memory/1932-56-0x0000000000220000-0x000000000025F000-memory.dmp

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