nymaim | 44a0f733868fdc74689b32d99ce72739620ce45b816412b70cd530303ecddba9

Analysis

max time kernel
52s
max time network
54s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
07/10/2022, 16:48

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General

Target
file.exe
Size 396KB
Sample221007-va38ksche7
SHA256 44a0f733868fdc74689b32d99ce72739620ce45b816412b70cd530303ecddba9
MD5 1d23fdee8b23e49a515e93412ecd44d0
SHA1 ac86ae5bbb7c7ca171fa8f465daf00738e41cf3d
SHA512 5ac7446a917e2e4c7bcd4a19664d30def89f2bd7654babae9b8fab35ab87e1d61f9a54159291f62bdc61ef161c17cd738976dce993955ff7558fda1efda767b8
SSDEEP 12288:Hl15BAl/aCt3L/7zJ9eDgLBOstO6unnbsc:FL6l/rjCDAOsYQ
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
896	V9ysBvE76fzuE.exe

Deletes itself 1 IoCs

pid	Process
1796	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1808	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
1248	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1808	file.exe
1808	file.exe
1808	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1248	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1808 wrote to memory of 896	1808	file.exe	29
PID 1808 wrote to memory of 896	1808	file.exe	29
PID 1808 wrote to memory of 896	1808	file.exe	29
PID 1808 wrote to memory of 896	1808	file.exe	29
PID 1808 wrote to memory of 1796	1808	file.exe	30
PID 1808 wrote to memory of 1796	1808	file.exe	30
PID 1808 wrote to memory of 1796	1808	file.exe	30
PID 1808 wrote to memory of 1796	1808	file.exe	30
PID 1796 wrote to memory of 1248	1796	cmd.exe	32
PID 1796 wrote to memory of 1248	1796	cmd.exe	32
PID 1796 wrote to memory of 1248	1796	cmd.exe	32
PID 1796 wrote to memory of 1248	1796	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:1808
- C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\V9ysBvE76fzuE.exe
  2⤵
  - Executes dropped EXE
  PID:896
- 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:1796
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1248

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

V9ysBvE76fzuE.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\V9ysBvE76fzuE.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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V9ysBvE76fzuE.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\V9ysBvE76fzuE.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/1808-57-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1808-54-0x0000000076171000-0x0000000076173000-memory.dmp

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memory/1808-61-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1808-65-0x00000000005AB000-0x00000000005DC000-memory.dmp

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memory/1808-66-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1808-56-0x0000000000220000-0x0000000000273000-memory.dmp

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memory/1808-68-0x00000000005AB000-0x00000000005DC000-memory.dmp

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memory/1808-69-0x0000000000400000-0x0000000000468000-memory.dmp

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memory/1808-55-0x00000000005AB000-0x00000000005DC000-memory.dmp

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