nymaim | 76e36d8a69d09ef26a2689fe0edc4d6bd28d1cdbb27a871b7566357b59a9427f

Analysis

max time kernel
58s
max time network
60s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
07/10/2022, 02:39

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General

Target
file.exe
Size 397KB
Sample221007-c5akmsbdd2
SHA256 76e36d8a69d09ef26a2689fe0edc4d6bd28d1cdbb27a871b7566357b59a9427f
MD5 dfc51f13a95e4111854a6a3ac12a6f4a
SHA1 2dbaaa69bd00ead9b9fff95c1c169b5bced46216
SHA512 26bbf2b0d7a9941acdd0c5f475bfa6aa15ee2b1e25f8c1a3a479cfc01776ab9b0568ca1d03a7dae4275b71b4f7435bd7524a0f62d8fba8a5aee9d48dc7a8ccd7
SSDEEP 6144:M2+fdtSV88jhgOWSffdyBi1PqLMEqUC9JdUpzuzbgwuOfrYwVfU:MXf3KPjCifV1CLMEuTUJunnRfrQ
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
1792	UPsw2lRn.exe

Deletes itself 1 IoCs

pid	Process
1800	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
1444	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
924	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1444	file.exe
1444	file.exe
1444	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	924	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1444 wrote to memory of 1792	1444	file.exe	28
PID 1444 wrote to memory of 1792	1444	file.exe	28
PID 1444 wrote to memory of 1792	1444	file.exe	28
PID 1444 wrote to memory of 1792	1444	file.exe	28
PID 1444 wrote to memory of 1800	1444	file.exe	29
PID 1444 wrote to memory of 1800	1444	file.exe	29
PID 1444 wrote to memory of 1800	1444	file.exe	29
PID 1444 wrote to memory of 1800	1444	file.exe	29
PID 1800 wrote to memory of 924	1800	cmd.exe	31
PID 1800 wrote to memory of 924	1800	cmd.exe	31
PID 1800 wrote to memory of 924	1800	cmd.exe	31
PID 1800 wrote to memory of 924	1800	cmd.exe	31

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:1444
- C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\UPsw2lRn.exe
  2⤵
  - Executes dropped EXE
  PID:1792
- 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:1800
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:924

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

UPsw2lRn.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\UPsw2lRn.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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UPsw2lRn.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\UPsw2lRn.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/1444-57-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/1444-54-0x0000000075041000-0x0000000075043000-memory.dmp

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memory/1444-55-0x000000000063B000-0x000000000066C000-memory.dmp

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memory/1444-61-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1444-65-0x000000000063B000-0x000000000066C000-memory.dmp

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memory/1444-66-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/1444-68-0x000000000063B000-0x000000000066C000-memory.dmp

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memory/1444-69-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/1444-56-0x0000000000250000-0x00000000002A3000-memory.dmp

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