nymaim | 0670be19d69df3a74ce4adf22db4c4de1885d592c430e58942fb247409cd8eed

Analysis

max time kernel
139s
max time network
142s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
05/10/2022, 23:27

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General

Target
file.exe
Size 233KB
Sample221005-3fd5msgbej
SHA256 0670be19d69df3a74ce4adf22db4c4de1885d592c430e58942fb247409cd8eed
MD5 2180cd2c1867ab5a820c5ed398315cb0
SHA1 e3dbd8ccf4d0f49936ce00baeada9923d043bf28
SHA512 3064dba0d25730599c4aef83db68babc88d38788d198087549c49065d27e917a4fbad2d3782a5e05eae474ac8a76f54036b46936bf66a5665adba962c5c157de
SSDEEP 3072:L11Qlz4hfSTn61Iq3v8yceS3Thc7ztPGNx5SsIg9n9jIScRi+eAuF50yhFFr5IRn:xqO1dvPcS7ztPYSlMMQ+duHF3RQWAC
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
1856	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
540	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
268	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
1956	1856	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
1900	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
948	file.exe
948	file.exe
948	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
948	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1856	Cleaner.exe
Token: SeDebugPrivilege	1900	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 948 wrote to memory of 268	948	file.exe	30
PID 948 wrote to memory of 268	948	file.exe	30
PID 948 wrote to memory of 268	948	file.exe	30
PID 948 wrote to memory of 268	948	file.exe	30
PID 268 wrote to memory of 1856	268	cmd.exe	32
PID 268 wrote to memory of 1856	268	cmd.exe	32
PID 268 wrote to memory of 1856	268	cmd.exe	32
PID 268 wrote to memory of 1856	268	cmd.exe	32
PID 1856 wrote to memory of 1956	1856	Cleaner.exe	34
PID 1856 wrote to memory of 1956	1856	Cleaner.exe	34
PID 1856 wrote to memory of 1956	1856	Cleaner.exe	34
PID 948 wrote to memory of 540	948	file.exe	35
PID 948 wrote to memory of 540	948	file.exe	35
PID 948 wrote to memory of 540	948	file.exe	35
PID 948 wrote to memory of 540	948	file.exe	35
PID 540 wrote to memory of 1900	540	cmd.exe	37
PID 540 wrote to memory of 1900	540	cmd.exe	37
PID 540 wrote to memory of 1900	540	cmd.exe	37
PID 540 wrote to memory of 1900	540	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:948
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\CXUqnKXz4Avc5mkYWqVtgC3h8wRd6\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:268
- - C:\Users\Admin\AppData\Local\Temp\CXUqnKXz4Avc5mkYWqVtgC3h8wRd6\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\CXUqnKXz4Avc5mkYWqVtgC3h8wRd6\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1856
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1856 -s 1152
      4⤵
      Program crash
      PID:1956
- 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:540
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1900

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\CXUqnKXz4Avc5mkYWqVtgC3h8wRd6\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\CXUqnKXz4Avc5mkYWqVtgC3h8wRd6\Cleaner.exe
Size 2.4MB
SHA256 cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060
MD5 79754768767380ef36ef446c6a1709e4
SHA1 2af83a6e20d7efc3119d312534b3f3968d17776e
SHA512 6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461
SSDEEP 24576:wO4dHPD/oAR4d3G/oAXndxzGmTG2/mR29SGeodc0GmTG2/mR6Trr2h60qP:w/PD/DL/D9CuZrr2h60qP
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\CXUqnKXz4Avc5mkYWqVtgC3h8wRd6\Cleaner.exe
Size 2.4MB
SHA256 cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060
MD5 79754768767380ef36ef446c6a1709e4
SHA1 2af83a6e20d7efc3119d312534b3f3968d17776e
SHA512 6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461
SSDEEP 24576:wO4dHPD/oAR4d3G/oAXndxzGmTG2/mR29SGeodc0GmTG2/mR6Trr2h60qP:w/PD/DL/D9CuZrr2h60qP
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\CXUqnKXz4Avc5mkYWqVtgC3h8wRd6\Cleaner.exe
Size 2.4MB
SHA256 cd6bb6fdf80bec69630a61707383e6430463751463635f35fce42eb97daa7060
MD5 79754768767380ef36ef446c6a1709e4
SHA1 2af83a6e20d7efc3119d312534b3f3968d17776e
SHA512 6f88e9e5f5309ff1e87666a8066333660db37f85031db6dbfb28460700a31d303e140f8dd5fe0e71f2de01706ac7e1317b8a6fd2d992a47bdaa3bb591965f461
SSDEEP 24576:wO4dHPD/oAR4d3G/oAXndxzGmTG2/mR29SGeodc0GmTG2/mR6Trr2h60qP:w/PD/DL/D9CuZrr2h60qP
MD5 SHA1 SHA512 SSDEEP

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memory/948-59-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/948-70-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/948-58-0x00000000006DB000-0x0000000000701000-memory.dmp

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memory/948-55-0x00000000006DB000-0x0000000000701000-memory.dmp

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memory/948-57-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/948-54-0x0000000074AB1000-0x0000000074AB3000-memory.dmp

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memory/948-75-0x0000000000400000-0x0000000000596000-memory.dmp

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memory/948-56-0x0000000000250000-0x000000000028F000-memory.dmp

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memory/1856-68-0x0000000000300000-0x0000000000342000-memory.dmp

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memory/1856-66-0x000007FEFB6D1000-0x000007FEFB6D3000-memory.dmp

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memory/1856-65-0x0000000000360000-0x00000000004D2000-memory.dmp

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