nymaim | 5907a31c45052e387100d65e401262cd4b84fa1977b4e210ece0d0a16a34fec3

Analysis

max time kernel
80s
max time network
87s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
20/11/2022, 04:47

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General

Target
file.exe
Size 2.2MB
Sample221120-fejbmsgc69
SHA256 5907a31c45052e387100d65e401262cd4b84fa1977b4e210ece0d0a16a34fec3
MD5 5b5bc27a82ca61cf6bce51cd005fcd6e
SHA1 40b083c5e973876fec5b6ccb35c954dd6929adb2
SHA512 de5751b03cd381bc3e19ca084046fae460f539d4a4490732c5310d20a31606969631806d26f6ab1c838779f0b2d31047ebb09f73b22862229952e4c4e2d0aff8
SSDEEP 49152:q263LYZH5VSYMejTh4G7i2MadHqAcieRy5bRXWxUxVkBaFwnm:r63u5VP93dHqhbUbUUxVkB04m
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
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 3 IoCs

pid	Process
2016	is-DCF2D.tmp
860	gusearcher85.exe
268	zzYdkVC7xZQz.exe

Loads dropped DLL 6 IoCs

pid	Process
1048	file.exe
2016	is-DCF2D.tmp
2016	is-DCF2D.tmp
2016	is-DCF2D.tmp
2016	is-DCF2D.tmp
860	gusearcher85.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\guSearcher\is-QNG1A.tmp	is-DCF2D.tmp
File created	C:\Program Files (x86)\guSearcher\is-0IF8A.tmp	is-DCF2D.tmp
File opened for modification	C:\Program Files (x86)\guSearcher\unins000.dat	is-DCF2D.tmp
File opened for modification	C:\Program Files (x86)\guSearcher\gusearcher85.exe	is-DCF2D.tmp
File created	C:\Program Files (x86)\guSearcher\unins000.dat	is-DCF2D.tmp
File created	C:\Program Files (x86)\guSearcher\is-MEFVQ.tmp	is-DCF2D.tmp
File created	C:\Program Files (x86)\guSearcher\is-6EKUO.tmp	is-DCF2D.tmp
File created	C:\Program Files (x86)\guSearcher\is-9GAC4.tmp	is-DCF2D.tmp
File created	C:\Program Files (x86)\guSearcher\is-BFP6E.tmp	is-DCF2D.tmp
File created	C:\Program Files (x86)\guSearcher\is-ARL2H.tmp	is-DCF2D.tmp
File created	C:\Program Files (x86)\guSearcher\is-STN69.tmp	is-DCF2D.tmp
File created	C:\Program Files (x86)\guSearcher\is-M7L8A.tmp	is-DCF2D.tmp

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
1324	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
860	gusearcher85.exe
860	gusearcher85.exe
860	gusearcher85.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1324	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 2016	1048	file.exe	27
PID 1048 wrote to memory of 2016	1048	file.exe	27
PID 1048 wrote to memory of 2016	1048	file.exe	27
PID 1048 wrote to memory of 2016	1048	file.exe	27
PID 1048 wrote to memory of 2016	1048	file.exe	27
PID 1048 wrote to memory of 2016	1048	file.exe	27
PID 1048 wrote to memory of 2016	1048	file.exe	27
PID 2016 wrote to memory of 860	2016	is-DCF2D.tmp	28
PID 2016 wrote to memory of 860	2016	is-DCF2D.tmp	28
PID 2016 wrote to memory of 860	2016	is-DCF2D.tmp	28
PID 2016 wrote to memory of 860	2016	is-DCF2D.tmp	28
PID 860 wrote to memory of 268	860	gusearcher85.exe	29
PID 860 wrote to memory of 268	860	gusearcher85.exe	29
PID 860 wrote to memory of 268	860	gusearcher85.exe	29
PID 860 wrote to memory of 268	860	gusearcher85.exe	29
PID 860 wrote to memory of 1960	860	gusearcher85.exe	32
PID 860 wrote to memory of 1960	860	gusearcher85.exe	32
PID 860 wrote to memory of 1960	860	gusearcher85.exe	32
PID 860 wrote to memory of 1960	860	gusearcher85.exe	32
PID 1960 wrote to memory of 1324	1960	cmd.exe	34
PID 1960 wrote to memory of 1324	1960	cmd.exe	34
PID 1960 wrote to memory of 1324	1960	cmd.exe	34
PID 1960 wrote to memory of 1324	1960	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1048
- C:\Users\Admin\AppData\Local\Temp\is-BTO5B.tmp\is-DCF2D.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-BTO5B.tmp\is-DCF2D.tmp" /SL4 $70120 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2080246 318464
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2016
- - C:\Program Files (x86)\guSearcher\gusearcher85.exe
    "C:\Program Files (x86)\guSearcher\gusearcher85.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:860
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\zzYdkVC7xZQz.exe
      4⤵
      Executes dropped EXE
      PID:268
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "gusearcher85.exe" /f & erase "C:\Program Files (x86)\guSearcher\gusearcher85.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1960
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "gusearcher85.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1324

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

gusearcher85.exe

Path C:\Program Files (x86)\guSearcher\gusearcher85.exe
Size 3.0MB
SHA256 e7cc808e202596111f7c94390893f0807bdb5e1fb7befe2ed0c7460583b0aa86
MD5 a66f700c6b4020fa6db38db71f8b918a
SHA1 689b99520f220abb34b8712c36d1106e888cdf75
SHA512 2bb610e5b3611e7446d8d230989cc903c5a9275b3dcd562c0f59a0489bf5fec8c3e8ff14aa166b4fbb05c458de8bd0b21469fd4c6b48666d99d307894aef5994
SSDEEP 49152:f1twzS3XqmNsgcVSb1+/zS7vBUMMS5dhQLt01oS4u4wxGdN8ZmkLW12:NXMkbuO7BUMMS5dhQ61oFuBQH8mkE2
MD5 SHA1 SHA512 SSDEEP

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gusearcher85.exe

Path C:\Program Files (x86)\guSearcher\gusearcher85.exe
Size 3.0MB
SHA256 e7cc808e202596111f7c94390893f0807bdb5e1fb7befe2ed0c7460583b0aa86
MD5 a66f700c6b4020fa6db38db71f8b918a
SHA1 689b99520f220abb34b8712c36d1106e888cdf75
SHA512 2bb610e5b3611e7446d8d230989cc903c5a9275b3dcd562c0f59a0489bf5fec8c3e8ff14aa166b4fbb05c458de8bd0b21469fd4c6b48666d99d307894aef5994
SSDEEP 49152:f1twzS3XqmNsgcVSb1+/zS7vBUMMS5dhQLt01oS4u4wxGdN8ZmkLW12:NXMkbuO7BUMMS5dhQ61oFuBQH8mkE2
MD5 SHA1 SHA512 SSDEEP

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is-DCF2D.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-BTO5B.tmp\is-DCF2D.tmp
Size 917KB
SHA256 a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff
MD5 f4d82ac5ccb900eb1ced5e8b69fac0c7
SHA1 b43f8fa853706d5732c4d77b7a509977ebe78ea3
SHA512 26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c
SSDEEP 12288:lkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphVV8y2UbZzoiGvu+xgx:iFRCUn4rP/37YzHXA6QJsoPtIpCxgx
MD5 SHA1 SHA512 SSDEEP

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is-DCF2D.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-BTO5B.tmp\is-DCF2D.tmp
Size 917KB
SHA256 a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff
MD5 f4d82ac5ccb900eb1ced5e8b69fac0c7
SHA1 b43f8fa853706d5732c4d77b7a509977ebe78ea3
SHA512 26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c
SSDEEP 12288:lkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphVV8y2UbZzoiGvu+xgx:iFRCUn4rP/37YzHXA6QJsoPtIpCxgx
MD5 SHA1 SHA512 SSDEEP

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zzYdkVC7xZQz.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\zzYdkVC7xZQz.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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gusearcher85.exe

Path \Program Files (x86)\guSearcher\gusearcher85.exe
Size 3.0MB
SHA256 e7cc808e202596111f7c94390893f0807bdb5e1fb7befe2ed0c7460583b0aa86
MD5 a66f700c6b4020fa6db38db71f8b918a
SHA1 689b99520f220abb34b8712c36d1106e888cdf75
SHA512 2bb610e5b3611e7446d8d230989cc903c5a9275b3dcd562c0f59a0489bf5fec8c3e8ff14aa166b4fbb05c458de8bd0b21469fd4c6b48666d99d307894aef5994
SSDEEP 49152:f1twzS3XqmNsgcVSb1+/zS7vBUMMS5dhQLt01oS4u4wxGdN8ZmkLW12:NXMkbuO7BUMMS5dhQ61oFuBQH8mkE2
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-DCF2D.tmp

Path \Users\Admin\AppData\Local\Temp\is-BTO5B.tmp\is-DCF2D.tmp
Size 917KB
SHA256 a9881bd0cfd544279a707471babeed014cd134268f2e793cecb604d1f9a987ff
MD5 f4d82ac5ccb900eb1ced5e8b69fac0c7
SHA1 b43f8fa853706d5732c4d77b7a509977ebe78ea3
SHA512 26fa609a47f7d57cc4b00bd861e7ad5441e4f891a76a50f3c8fed8a3ac51868641c1600fe50438c558f5fdd1ae790b1bbb286475e281a7fd46c5b892e110711c
SSDEEP 12288:lkxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphVV8y2UbZzoiGvu+xgx:iFRCUn4rP/37YzHXA6QJsoPtIpCxgx
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-JL3FH.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-JL3FH.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-JL3FH.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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zzYdkVC7xZQz.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\zzYdkVC7xZQz.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/860-71-0x0000000000400000-0x0000000001500000-memory.dmp

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memory/860-78-0x0000000000400000-0x0000000001500000-memory.dmp

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memory/860-86-0x0000000000400000-0x0000000001500000-memory.dmp

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memory/860-72-0x0000000000400000-0x0000000001500000-memory.dmp

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memory/860-83-0x0000000000400000-0x0000000001500000-memory.dmp

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memory/860-79-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/860-70-0x0000000000400000-0x0000000001500000-memory.dmp

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memory/1048-76-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1048-54-0x00000000759F1000-0x00000000759F3000-memory.dmp

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memory/1048-87-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/1048-55-0x0000000000400000-0x0000000000455000-memory.dmp

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memory/2016-77-0x0000000003120000-0x0000000004220000-memory.dmp

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memory/2016-69-0x0000000003120000-0x0000000004220000-memory.dmp

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